论文部分内容阅读
淬火温度升高时,高铬工具钢具有残余奥氏体量增加的明显趋势。当残余奥氏体量>40%时,将导致抗弯强度降低,冲击韧性明显提高。弯曲试验时,试样的最大挠度与钢材的冲击韧性(晶粒度不变时)之间呈直线关系;残余奥氏体量与钢的淬火硬度之间呈抛物线关系;残余奥氏体量与淬火时的尺寸变化之间基本上呈直线关系。淬火温度升高时,残余奥氏体对冲击韧性及淬火时尺寸变化的影响程度也增大。X12M钢淬火零件在高于400℃温度下多
High quenching temperature, high chromium tool steel with retained austenite increased the obvious trend. When the amount of retained austenite> 40%, will result in lower bending strength, impact toughness improved significantly. The bending test, the maximum deflection of the sample and the impact toughness of steel (grain size constant) was a linear relationship between the amount of retained austenite and the quenching hardness of steel was a parabolic relationship between the amount of retained austenite and Quenching the size of the change between the basically linear relationship. Quenching temperature increases, the residual austenite impact toughness and dimensional changes when quenching also increased. X12M steel quenched parts at temperatures higher than 400 ℃