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34CrNiMo6 Intorcution –Properties/chemical/application/heat treatment

34CrNiMo6 steel Intorcution –Properties/chemical/application/heat treatment

34CrNiMo6 is equal to 1.6582 .

The chemical of the grade for 34CrNiMo6 and 1.6582 as the below sheet :

The application of 34CrNiMo6:

34CrNiMo6 is a typical difficult-to-machine material, widely used in the manufacture of important parts such as camshafts and connecting rods of engines.

The 34CrNiMo6 alloy is high-strength. Because of its excellent comprehensive mechanical properties, it is widely used in the manufacture of engine camshafts and connecting rods and other important parts.

The stock for the specification as the below :

Mechanical properties of 34CrNiMo6 as the below mention :

After 34CrNiMo6 material is quenched and tempered, the hardness is 36-40 HRC, the tensile strength σb is 1 100 MPa, the elongation δ is 12%, and the impact toughness value ακ is 8 kg / cm2.

Heat treatment:

The tempering process of 34CrNiMo6 is 850 oil quenching and 580 degree tempering.

Quenched and Tempered (Q+T) of 34CrNiMo6 Steel

• Heat 34CrNiMo6 round steel slowly to the temperature of 850°C;
• Soak at this hardening temperature quench in oil;
• Temper as soon as 34CrNiMo6 steels reach room temperature.
• Heat uniformly to the suitable temperature;
• Withdraw from the furnace and cool in the air.
• The usual tempering temperature is 600°C which depending on the actual requirements.

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34CrNiMo6 Intorcution –classification and chemical analysis

34CrNiMo6 Introduction –classification and chemical analysis

classification:

① quenched and tempered structural steel

②Surface hardened structural steel

① The carbon content of quenched and tempered steels is generally about 0.25% to 0.55%. For structural parts of a given cross-sectional size, when quenching and tempering along the cross-section during quenching and tempering (quenching and tempering), the mechanical properties are good. If it is not quenched and free ferrite appears in the microstructure, the toughness decreases. For steels with a tendency to temper brittleness, such as manganese steel, chromium steel, nickel-chromium steel, etc., they should be cooled quickly after tempering. The critical quenching diameter of this type of steel increases with the increase in grain size and alloying element content. For example, 40cr and 35simn steel is about 30-40mm, and 40crnimo and 30crni2mov steel is about 60-100mm, which is commonly used in manufacturing Structural parts such as shafts and connecting rods with large loads.

②Surface hardened structural steel is used to manufacture hard and wear-resistant surface parts and flexible parts, such as gears and shafts. In order to increase the toughness of the core of the part, the carbon content in the steel should be low, generally 0.12 to 0.25%, and there is also an appropriate amount of alloying elements to ensure proper hardenability. Nitrided steel also needs to add alloy elements (such as al, cr, mo, etc.) that are easy to form nitrides. Carburized or carbonitrided steel, after carburizing or carbonitriding at 850 ～ 950 ℃, quenched and used under low-temperature tempering (about 200 ℃). The nitrided steel is directly treated by nitriding (480 ～ 580 ℃), and it is no longer quenched and tempered.

34CrNiMo6 (1.6582) belongs to European standard high-strength alloy structural steel.

According to the carbon equivalent calculation formula recommended by the International Welding Society (IIW) Ceq = C + 1 / 6Mn + 1/5 (Cr + Mo + V) +1/15 (Ni + Cu) (%)

(1) When Ceq <0.40%;

(2) When Ceq = 0.40 ～ 0.60%, the hardening tendency of the steel gradually becomes obvious, and the weldability is acceptable. When welding, appropriate preheating before welding and slow cooling after welding should be adopted to control its welding line energy;

(3) When Ceq> 0.60%, the steel has a strong hard tendency and poor weldability. It is a steel type that is more difficult to weld, and a higher preheating temperature and strict process measures must be taken to select suitable welding. material. It is calculated that the carbon equivalent value of 35CrMo steel Ceq = 0.72%.

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Europe Steel situation effected by COVID-19 with price ,trading issue…

The long-term producer Steel Plant (BMZ) has reduced processing capacity in the next round and wire orders of European and auto and auto parts manufacturers. This may reduce production this year by 300,000-350,000 metric tons, and encourages BMZ to carry out a three to a four-month renovation of the soot processing device that was originally scheduled to collect exhaust gas from the second electric arc furnace in 2021. The plan will be in 2020 The fourth quarter of the year, according to sources close to the company.

Price and trading volume

Steel prices are facing downward pressure due to the temporary shutdown of automobile manufacturers in most parts of Europe and the reduction in trade activity in the construction and other steel industries, which has led to the interruption of trade flows. Despite Europe ’s import protection measures, some key steel prices have reached a three-year low in 2019. At that time, the European market was oversupplied. Despite the import protection plan, imports to the EU remained at historical highs, and prices are now even Close to 2009 levels.

The Nordic HR coil ex-works price (Ruhr) started in January 2020 at a price of Eue435 ($ 469.80) / mt, even lower than Eur450 / mt in January 2009, and has risen to Eur474 / mt since the beginning of March 2020 . The impact of production cuts.

S & P Global Platts Energy Information research shows that imports are picking up, and Asia is actively providing imports to Europe. International prices are under pressure, but due to long delivery times and current trade and logistics uncertainties, many buyers have not considered imports. Nordic steel mills hope to provide hot-rolled coil CFR (North Africa) at a lower price because they seek to unload outside the EU to maintain domestic market prices.

Source Xiaomi Finance is integrated from Xinhua Net, Economic Observation Net, Overseas Steel, Tyco Steel, etc.

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Regarding analysis about the steel due to COVID-19

CIS

Regarding analysis about the steel due to COVID-19 Ukraine

In the last week of March, ArcelorMittalKryviy Rih worked in Ukraine, temporarily suspending the No. 1 blooming mill and the No. 3 light rolling mill at one of its two flowering plants. The facility will remain idle until the quarantine caused by a coronavirus in Ukraine on April 24. The plant will continue to operate mills 1 and 5, while mill 5 will maintain half of its capacity. The company said that in April and May, the output of its main products (long products, billet and pig iron) will be 20% lower than normal.Given that last year, the plant’s average monthly saleable output was 390,000-393,000 tons, and the monthly output from April to May may fall by 80,000 tons to 310,000-313,000 tons/month.

Metinvest, a Ukrainian mining and steel group, said this week that if the operations of its Italian plant will not return to normal soon, it will have to cut output from its Ukrainian steel plant. Since March 24, due to the coronavirus pandemic, its business has decreased significantly.  The production of utility steel from Italian medium and heavy plate coil producers Ferriera Valsider and Trametal, owned by Metinvest, has decreased by 40,000 metric tons.

The steel mill is scheduled to restart on April 3, but if the Italian government resumes quarantine, Metinvest will also be forced to reduce the output of its Ukrainian steel mills, mainly in Azovstal, which supplies slabs to Italian steel mills. If the situation continues, Metinvest does not rule out the temporary suspension of Azovstal’s slab continuous casting. The company may also consider blowing down No. 3 blast furnace in Azovstal and postponing the restart of the refurbished No. 4 blast furnace until May (expected to begin in April).

Although the two-week quarantine work began on March 30 in the Karaganda region where it is located, the Temirtau steel plant in Kazakhstan is still operating normally. “The company is in steel production, coal and iron ore mining as well as continuing to fulfill its obligations to customers.”

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Europe countries ‘ situation effected by COVID-19 Part two

Since April 7th, ArcelorMittal has begun preparations for the temporary closure of blast furnace A at its Gijon plant in Asturias. The plant has two blast furnaces with a total annual output of 4.2 million tons of crude steel. According to S & P Global Platts Energy Information, the annual crude steel production capacity of furnace A is about 2.7 million tons per year.

On the morning of March 31, Basque (Sestao) temporarily shut down the electric arc furnace to balance supply and demand. Sestao’s crude steel design capacity is about 1.4 million tons/year, but since September last year, the annual output has been 300,000 tons/year for the automotive industry.

Last week AM stopped production of its 250,000-ton / year steel rolling mill in Lesaka, which produces organic coated coils for the automotive sector. It also closed its Sagunto rolling mill, and its annual production capacity of galvanized products is about 600,000 tons, accounting for 70% of the automotive industry.

AM’s Olaberria-Bergara production line for the automotive and construction industries is running.

the other europe countries’ situation analysis effected by COVID-19

United Kingdom

Steel producers are still working, but due to restrictions imposed by the government, production has been adjusted to reduce demand. The total output is usually 7.3 million tons/year. Major producers Tata Steel (Talbert Port has a production capacity of 3.5 million tons/year), British Steel (2.5 million tons/year) and Free Group reported that production in product areas related to the automotive industry has been reduced.

Tata Steel said: “We will continue to operate all four blast furnaces at our two steelmaking centers-IJmuiden in the Netherlands and Port Talbot in Wales. However, due to the sudden drop in steel production, liquid Steel production will decrease. Demand. ”

British Steel continues to operate two blast furnaces with an annual output of approximately 2.5 million tons.

Freedom Group continues to produce approximately 1.2 million shares of crude steel through two furnaces in Rotherham, England. Once the customer’s plan is completed and the plant and equipment are shut down, Liberty will only suspend operations at Liberty Pressing Solutions, Liberty TubeComponents and Liberty Aluminium Technologies related to the automotive industry, and restart effectively when needed.

Belgium: Liberty Liege-Dudelange closed the three production bases of Flemalle, Tiller, and Dudelange on March 21, and stated that it will continue to deliver finished products to customers.

Austria: Voestalpine, which has an annual capacity of 5 million tons, has idled a blast furnace in Linz and announced short-term work.

Poland: In view of the current market uncertainty, Poland ArcelorMittal Poland has postponed the restart of its Krakow blast furnace (expected to resume production in the second half of March).

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Europe countries ‘ situation effected by COVID-19 Part one

Germany

Germany is the largest steel-making country in the European Union, producing 39.7 million tons of crude steel in 2019. With the closure of the country’s automotive industry, several steel mills announced a reduction in production capacity.

The ArcelorMittal Bremen plant has a production capacity of 3.6 million tons and one of the two blast furnaces has been idle. The work of Bottrop and Eisenhuettenstadt reduced working hours.

Thyssenkrupp, Germany’s largest steel producer, will enter short-term production and cut production.

Salzgitter reduced flat steel output. Saarstahl and Dillinger have a pig iron production capacity of 4.6 million tons per year. Due to the high idling cost and the need for more maintenance work, their crude steel output is kept at the lowest technically possible productivity. Salstar ’s 500,000 t / y long steel mill capacity is 50%. Cold rolling mills are reducing production due to insufficient supply due to the shutdown of steel and automobile factories.

Italy

Italy is the second largest producer in the European Union. In 2019, crude steel production was 23 million tons per year. Except for the factories of Taranto and Arvedi of Angelor Mittal, all The steel mills have shut down their operations in accordance with government regulations against COVID-19.

Italy ’s largest flat steel producer Taranto has closed its 2 million ton / year blast furnace No. 2 and No. 1 smelting plant, but has obtained permission to keep No. 1 and No. 4 blast furnaces operating. Continuous cycle production capacity, so it is produced at a historically low level of approximately 8,500 metric tons per year.

Arvedi, a Lombardy electric arc furnace (EAF) steel producer with an annual capacity of 4 million tons per year, has also been allowed to continue production, but only at a reduced speed during the weekend.

France

ArcelorMittal has stopped the production of two blast furnaces, one of which is located in Foss-sur-Mer, and the other is located in Dunkirk, with about 4 million tons of crude steel rolled off the line every year.

The Beltrame Group, Europe’s largest commercial steel bar producer, closed its French business Lamines Marchands Europes (LME) in Trith Saint Leger in northern France, with an annual capacity of 850,000 tons of electric furnaces and two steel mills until the end of March. It is understood that the closure is under review.

Spain

The Spanish Steel Industry Association UNESID is seeking clarification from the Ministry of Industry on what is an important industry. Fighting the coronavirus in tougher measures will only allow “strategically important departments” to continue to operate. During the measures taken, many consumer factories (such as car manufacturers) have been closed.

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Europe Steel Industrial have effected by COVID-19

European industries  affected by the pandemic

The European steel industry was severely hit by the coronavirus pandemic. Experts report that the automotive industry is the second largest consumer industry for steel, temporarily closed. while the construction industry (the most consumed industry) slowed sharply in the UK in the last week of March. It can be expected that the current crisis (still intensifying) will have the same impact on the steel industry as the global financial crisis, or even greater. According to data from the World Steel Association (world steel), the financial crisis led to the EU ’s crude steel production in 2009 A year-on-year decline of nearly 30% to 139 million tons.

European steel price affected by the pandemic, the demand and capacity are reduced.

Jefferies International analysts Simon Thackray and Abraham Akra said this week: “The dislocation of COVID-19 steel demand should bring capacity utilization back to [Global Financial Crisis] levels and Steel production will be significantly affected. “During the COVID-19 pandemic, auto factories have been closed. We expect construction activities to slow down accordingly. Some governments are now exempt from lock-in operations. The mid-term demand blow from the pandemic will lead to unemployment. The rate is rising and it is expected that it will take several months to restore the locked state. ”

According to the International Iron and Steel Association, 28 countries/regions in the EU produced 159.4 million tons of crude steel in 2019. Sources from well-positioned steel makers say the current crisis may shut down the steelmaking capacity of major EU mills by as much as 50%. Agent SP Angel estimated on Friday that the European blast furnace with an annual capacity of 19 million tons has been closed and the capacity of other blast furnaces is decreasing. Other furnace shutdowns will occur in the next few days. Brazilian miner Vale said mid-week that European iron ore demand had been cut by 18 million tons.

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Global Steel Industrial have effected by COVID-19 – Preview

The global crisis, a large number of steel mills shut down! 40% of domestic steel mills lost money, and European steel prices fell back to 2009

In January-February, China Steel Association’s steel companies have lost more than 40% of their losses

Now member steel companies are basically on the brink of loss

The spread of the epidemic has exceeded all expectations, and the situation facing the steel industry and the market is confusing.

Chi Jingdong, vice chairman of the China Iron and Steel Association, said: “No one expected that it would be as serious as it is now. The whole world has reached a situation that is a little bit out of control. The new and old problems of the Chinese steel industry are superimposed and under the impact of the epidemic, Where will it go again? ”

Two months ago, the Chinese steel companies at that time were in an awkward position: the raw materials were difficult to enter, the materials were difficult to come out, and the inventory was rising … A person in charge of a large state-owned steel company told the Economic Observer, “The first quarter It ’s good to lose money. ”

the expertise’s prediction about the steel market

However, Chi Jingdong introduced, “The loss of member steel companies in January-February has exceeded 40%. Now the profit margin of member steel companies has fallen to almost 1%, which is basically at the edge of loss.”

His prediction for the future steel market is: In the short term, April steel prices will fluctuate within a narrow range with high probability. It is not always possible that profits will drop sharply, but good benefits are also difficult. If the foreign market is not good after April and May, at least the steel price in the first half of the year will be unsatisfactory. If the epidemic is delayed until June or July, the impact will be greater.

Chi Jingdong believes that this year the steel industry and the market are at great risk, and it is recommended that steel enterprises should be prepared to deal with the market decline.

In this steel test, the difficulties, problems and even deep-seated contradictions of the entire industry and enterprises themselves were exposed.

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Acero M2

El acero para herramientas M2 es acero de alta velocidad de tungsteno-molibdeno con una composición de carbono bien equilibrada y alta tenacidad.

¿Qué es el Acero M2?

El acero para herramientas M2 es acero de alta velocidad de tungsteno-molibdeno con una composición de carbono bien equilibrada y alta tenacidad. También se llama acero JIS SKH51 y DIN 1.3343. Es fácil sobrecalentar, controlar la temperatura de calentamiento de enfriamiento es necesario y los requisitos de protección del tratamiento térmico son estrictos. Se usa ampliamente para hacer herramientas de corte debido a su gran dureza y resistencia al desgaste. Ha reemplazado el acero de alta velocidad T1 en la mayoría de las aplicaciones, se ha convertido en la primera opción del cliente debido a su gran rendimiento y relación de precio de rendimiento extremadamente alto. Las propiedades del acero y el tratamiento térmico son las siguientes.

1.3343 Características del acero

1. Dureza (estado original de fábrica): ≤255HB
2. Temperatura de endurecimiento: 1220 ℃ -1240 ℃
3. Dureza (después del tratamiento térmico): ≤63HRC
4. Es una gran opción en aplicaciones de corte debido a su gran resistencia al desgaste y tenacidad.
5. Carburo distribuido uniformemente y alta tenacidad.
6. Se puede utilizar para hacer fresas, escariadores, brochas, cortadoras de engranajes y otras herramientas de la industria.

Tratamiento térmico de acero M2 y producido

Maquinabilidad

La conformación de aceros para herramientas M2 puede ejecutarse utilizando estrategias de rectificado. Pero, que tiene mala capacidad de molienda. Por eso se les llama acero para herramientas de maquinabilidad «mediana» en condiciones de recocido. La maquinabilidad de estos aceros es solo el 50% de la de los aceros para herramientas de endurecimiento por agua o grupo W fácilmente mecanizables.

Recocido

Calentar a 1600 ° F, remojar completamente al calor. El horno se enfría 25 ° F por hora a 900 ° F, el aire se enfría a temperatura ambiente. Dureza recocida aproximada 241 Brinell máximo.

Alivio de la tensión del material sin endurecer: Caliéntelo lentamente de 1200 a 1250 ° F. Remoje durante dos horas por pulgada de espesor al calor. Enfriamiento lento (horno frío si es posible) a temperatura ambiente.

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El acero para herramientas M2 es acero de alta velocidad de tungsteno-molibdeno con una composición de carbono bien equilibrada y alta tenacidad.

Endurecimiento

Calentar el acero M2 lentamente a 1550 ° F, remojar completamente, calentar a 1850 ° F, remojar completamente. El tiempo de remojo en el horno varía de unos pocos minutos a 15 minutos, dependiendo del tamaño de la herramienta, la capacidad de calor del horno y el tamaño de la carga. – Calentar a 2150 a 2200 ° F para máx. tenacidad y mínima distorsión. – Calentar a 2250 a 2275 ° F para máx.

Templado

Es necesario templar dos veces, a veces se prefiere templar tres veces. Remojar durante 2 horas por pulgada de espesor. Aire frío a temperatura ambiente entre los ánimos. El mejor rango de templado para dureza, resistencia y tenacidad es de 1000 a 1050 ° F.

Temple

Para obtener una dureza completa, es necesario enfriar en aceite a 150-200 ° F. El aire se enfría a 150 ° F. Cuando se enfría en sal caliente, se mantiene el enfriamiento justo por encima de la temperatura de Ms. Después de igualar, retire las partes de la sal caliente y enfríe al aire a 150 ° F.

Tratamiento térmico de acero M2

El acero M2 se precalienta antes del endurecimiento a 2610 ° C (4730 ° F). Luego se calienta rápidamente de 2610 ° C (4730 ° F) a 3960 ° C (7160 ° F). El acero finalmente se enfría durante 3 a 5 minutos y se enfría en aire, baño de sal o aceite.

1.3343 Aplicación de acero

La aplicación se decide por la composición química del acero M2 y sus propiedades. Tiene alta dureza, dureza roja. Buena termoplasticidad y excelente tenacidad. Se utiliza para fabricar herramientas que requieren buena resistencia al desgaste y tenacidad que pueden soportar grandes fuerzas de impacto. Tales como cortadores de piñones, cepilladoras, fresas, herramientas de torneado, brocas, etc.

Suministro de acero para herramientas M2

Barra redonda

Especificación: Dia 12-220 mm; Longitud: puede ser personalizado
Superficie: superficie negra / superficie brillante / pulida / pelada / torneada

Hoja / placa / losa

Especificación: espesor: 3-200 mm; ancho: se puede personalizar; longitud: se puede personalizar
Superficie: superficie negra / superficie brillante / pulida / pelada / torneada

aviso

Tenemos nuestros propios equipos de corte y procesamiento. Las especificaciones se pueden cortar y personalizar según sus requisitos.

Nos especializamos en proveedores y proveedores especiales de acero con un stand de alta calidad durante muchos años. Como proveedor profesional de acero M2, contáctenos para cualquier solicitud de materiales de acero AISI M2 / DIN 1.3343. Songshun Acero siempre contigo.

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