Deep drawing mold material selection and heat treatment of the request

Because of the deep drawing die failure mainly adhesive wear and abrasive wear, and mainly adhesion wear. So choose mould material must have high abrasion resistance and adhesion resistance, and sufficient strength. Selection should also be thinking is deep drawing data sheet thickness, deep drawing parts of the size and shape of consumption elements such as the size of the batch. （ A) Light load deep drawing ( Deep drawing sheet steel and copper, aluminum alloy) When mould material consumption quantity is small, about appearance simple cylindrical shallow drawing, can choose T8, T10 steel; About the shape complexity of small to medium sized parts, choose CrWMn, 9 mn2v. Mass consumption or consumption in large batch of products, use Cr12MoV. Consumption quantity is large, choose carbide or steel bonded carbide. （ 2) Overloading deep drawing ( Pull deep steel plate, the depth of counter loop and thinning drawing) At the time of the mould material consumption volume is small, can choose T10, CrWMn. Consumption quantity is bigger, use Cr12MoV and GM steel. GM steel strength and toughness higher than that of high speed steel, Cr12MoV; Adhesive wear and abrasive wear resistance can be obviously better than the substrate steel and Cr12MoV, in terms of deep drawing die has been applied to get better. Consumption quantity is large, consider choose carbide or steel bonded carbide. ( 3) Deep drawing of stainless steel, high nickel alloy steel, heat-resistant steel mould drawing such data, adhesion and hair easy to attack, preferred tooling data for aluminum bronze. Consumption quantity is small, aluminum bronze, T10A (optional Hard chrome plating, pay attention to when hard chromium plating technology is adopted coating can't be too thick, the peeling off when the deep drawing in case) 。 Consumption quantity is large, aluminum bronze, Cr12MoV, Cr12Mo1V1 ( Surface nitriding) 。 Consumption quantity is large, choose cemented carbide. ( 4) Large deep drawing parts, deep drawing of automobile cover parts die materials can choose or high strength alloy cast iron nodular cast iron. Graphite nodular cast iron can be smooth oil immersion, the organization have the smooth effect, can effectively reduce the friction in deep drawing, and capital is low, easy to processing. High strength ductile iron can adopt double medium delay martensite isothermal quenching cooling, in order to obtain high strength and toughness, hardness is 55 ~ 58 HRC. Delay mould preheating first again after heating to 880 ~ 900 ℃, the heat preservation after the first air precooling, then salt water quenched to about 550 ℃ or turn to oil cooling, when mould temperature down to about 250 ℃, in 180 ~ 200 ℃ hot oil isothermal adhere to 2 ~ 3 hours, then the oil temperature down to about 170 ℃ isothermal 5 ~ 7 hours, and finally into air cooling).