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矿山设备“抓斗”上的齿,材质均为ZGMn13。这种高锰钢在受到冲击或挤压力作用时,由于冷变形而硬化,表面硬度大大提高,耐磨性也随之提高。这种高锰钢在矿山应用较广。其化学成分为0.9%～1.3%C、11%～14%Mn、0.3%～0.8%Si、S≤0.05%、P≤0.10%,膨胀系数比碳钢大,可焊性很差。焊接时如果母材受热量很大,焊后冷却速度慢,就会使高锰钢经过水韧处理(加热温度1000～1100℃、水冷)后得到的奥氏体组织析出碳化物,造成塑性下降,易产生裂纹,耐冲击、磨损性能也有所降低。我们从抓斗的制造中,逐步摸索了一
Mining equipment “grab” on the teeth, the material is ZGMn13. This high manganese steel in the role of impact or squeezing pressure, due to cold deformation and hardening, the surface hardness greatly improved, wear resistance also will increase. This high manganese steel is widely used in mines. Its chemical composition is 0.9% ~ 1.3% C, 11% ~ 14% Mn, 0.3% ~ 0.8% Si, S≤0.05%, P≤0.10%, the expansion coefficient is larger than that of carbon steel, and the solderability is poor. If the welding of the base metal by a large amount of heat, slow cooling after welding, it will make the high manganese steel tough toughening treatment (heating temperature 1000 ~ 1100 ℃, water cooling) obtained after the austenite carbide precipitation, resulting in plastic decline , Easy to produce cracks, impact resistance, wear performance has also been reduced. We have gradually explored one from the manufacturing of the grab