D2, / 1.2379 steel
D2, / 1.2379 steel is high wear-resistant and micro-deformation cold mold steel, belong to the wind harden tool steel. The mass fraction of the carbon is as high as 1.5%, the mass fraction of chromium is as high as 11.5%, the hardness after heat treatment can reach 60 HRC, ductility, toughness, rust-resistant ability is getting weak relatively, the steel surface is also difficult to make mirror polishing processing. With the development of cold stamping products to high precision, high efficiency and various types, it is required that die steel have better wear resistance and toughness. Compared with Cr12MoV steel, on the chemical composition of the steel increased Mo, V, changed the steel casting organization, improved the morphology of austenite dish, strong toughness, and abrasion resistance is better than that of Cr12MoV steel, improved the service life of the mold. Because the yield point and plastic deformation resistance of the steel are higher than that of Cr12MoV steel, its forging performance and thermoplastic formability are slightly worse than that of Cr12MoV steel.
Form of D2, / 1.2379 we supply
Round bar Diameter: 8mm-600mm (8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,25mm,28mm,30mm,35mm,40mm,45mm,50mm,55mm,60mm,65mm,70mm,75mm,80mm,85mm,90mm,85mm,100mm,105mm,110mm,125mm,130mm,140mm- 600mm
Steel plate:2-250mm x 200-800mm
We have Vertical Saw cutting machine,Horizontal saw cutting machine,Lathes ,Bandsaw Machine for customised size.the tolerance of the cutting finished product would be guaranteed.
Reference Picture of the D2 round bar:
Basic information
D2, / 1.2379, high carbon and high chromium cold die steel widely used in the world, belongs to lipidoid steel with high hardenability, high abrasion resistance. High-temperature oxidation resistance, good corrosion resistance after quenching and polishing, low heat treatment deformation
Chemical composition
| Carbon | Manganese | Phosphorus | sulfur | silicon | Chromium | Vanadium | Molybdenum | |
| 1.4-1.6 | 0.1-0.6 | 0.03Max | 0.03max | 0.1-0.6 | 11-13 | 0.5-1.1 | 0.7-1.2 |
Heat treatment
Annealed:≤255HB, impression diameter:≥3.8mm;
Q+T:≥59HRC, Quench with preheat Temperature of 820±15℃, and then salt bath with 1000±6℃ or heat in controlled atmosphere furnace with the temperature of 1010±6℃. Keep this temperature for 10-20mins, and cool in air. after that tempering at 200±6℃., The hardness after Q+T will be no less than 59HRC
As tool steel, It must process with the annealing after production so it can be well prepared for the Q+T later in a specific usage.
Application
D2 is Suitable for complicated tool steel with possible deformation, all kinds of cold stamping die with high abrasion resistance and long life, cold cutting edge and thread rolling plate. Cold extrusion forming, drawing die, stainless steel sheet and high hardness material blanking die.
Typical applications:
1) For deep drawing mold of refrigerator compressor rear cover, quenching hardness 56~58HRC.
2) to improve the D2 cold work mold service life of the flat steel rolled products, adopt the method of adding rare earth, the wear resistance and impact toughness of steel is greatly improved, so as to achieve the purpose of prolonging the service life of circular mold flat steel rolled products.
3) as the content of V and Mo in D2 steel is higher than that of Cr12MoV steel, it has better comprehensive performance, and traditional Cr12MoV steel will be gradually replaced.
4) compared with Cr12MoV steel, the rolling wheel and off-platform adjustment plate cold punch made of D2 steel can increase the service life by 5-6 times.
Contact
Email: Jack@otaisteel.com
Tel: +86-769- 23190193
Fax: +86-769-88705839