冷却速度对大厚度P20塑料模具钢硬度的影响  

Influence of Cooling Speed on Hardness of P20 Plastic Mold Steel with Large Thickness

作　　者：丛文龙 于志军 孙海燕 

机构地区：[1]苏南重工机械科技有限公司,江苏215000

出　　处：《大型铸锻件》2017年第1期33-35,共3页Heavy Casting and Forging

摘　　要：采用JMatPro软件,研究了一定成分下P20塑料模具钢的淬火工艺,分析了不同冷却速度下P20模具钢的显微组织以及硬度情况。结果表明:增大冷却速度将会显著抑制铁素体、珠光体以及贝氏体的转变,增加马氏体的转变量。为保证大厚度P20模具钢心部硬度值,其冷却速度需大于1℃/s以满足其技术要求。By adopting JMatPro software, the quenching process of P20 plastic mold steel with a certain chemical composition has been studied. Meanwhile, the microstrueture and the hardness of P20 plastic mold steel at different cooling speed have been analyzed. The results show that the transformation of ferrite, pearlite and bainite is inhabited obviously along with the increase of the cooling speed, at the same time the transformation of martensite is increased. In order to ensure the core hardness value of P20 mold steel with large thickness, the cooling speed shall be more than l^C/s, as so to meet the technical requirements.

关 键 词：P20钢 冷却速度 硬度 

分 类 号：O242.1[理学—计算数学] TG156[理学—数学]