由于温锻模存在屈服强度和硬度下降,热应力和粘焊、粘着等现象,所以应选用在高温下具有较高机械强度和韧性的材料。在日本,一般选用热作模具钢SKD61或SK钢。然而,随着加工应力的增大和采用了强制冷却的方式,应选用高温强度或耐热裂性更高的YEM(AISI,H10),MDC(AIS1,H19),或其改良型钢种(YEM—K、MDC—K,MDC—K3);或具有高韧性的高速钢(YXR3,YXR4),以提高温锻模的寿命。 Due to the existence of temperature forging die yield strength and hardness decreased, thermal stress and sticky welding, adhesion and other phenomena, it should be used at high temperatures with high mechanical strength and toughness of the material. In Japan, the hot-die steel SKD61 or SK steel is generally used. However, YEM (AISI, H10), MDC (AIS1, H19), or its modified steels (YEM-H19) with higher temperature strength or hot cracking resistance should be used as the machining stress increases and forced cooling is adopted. K, MDC-K, MDC-K3), or high-speed steel (YXR3, YXR4) with high toughness to increase the service life of hot die.