锻压技术

锻造比对H13模具钢晶粒组织遗传规律的影响

英文标题：Influence of forging ratio on heredity rules of grain structure for die steel H13

作者：李长荣张迁王鹏

关键词：H13模具钢锻造晶粒度遗传性锻造比

分类号：TG314

出版年,卷(期):页码：2017,42(10):9-12

摘要：

为探究锻造比对H13模具钢晶粒组织遗传性的影响，在实验室条件下对H13模具钢进行真空冶炼，并加工成锻造比不同的锻件。观察锻造前后、不同锻造比下以及锻件在进行860 ℃等温球化退火后的金相组织变化。研究结果表明：锻造比为1时，经等温球化退火后H13模具钢晶粒保持了原试样的组织形态，具有明显的遗传现象；随着锻造比的增大，晶粒度增加，晶粒细化，晶粒组织的遗传性减弱；当锻造比为4时，晶粒度达到8.1，达到超细晶粒等级，晶粒组织的遗传现象基本消除；随着锻造比的增大，晶粒破碎明显增加，弱化了其组织的遗传性。

To investigate the influence of forging ratio on the grain structure heredity of die steel H13, the die steel H13 was vacuum smelted in the laboratory and processed into forgings with different forging ratios, and the microstructure changes before and after forging under different forging ratios and isothermal spheroidizing at 860 ℃were observed. The results show that when the forging ratio is 1, the grain of die steel H13 after isothermal spheroidizing keeps its original grain and appears obvious heredity phenomenon. When the forging ratio increases, the grain size increases and refines, and the heredity of grain decreases. When the forging ratio is 4, the grain size is up to 8.1 with super grain level, and the heredity of grain is almost eliminated. Thus, with the forging ratio increasing, the grain is significantly broken, and the heredity of grain is obviously weakened.

基金项目：

贵州省科技厅重点工业攻关项目（黔科合GY【2012】3016）

作者简介：李长荣（1963-），男，博士，教授,E-mail：cr263@163.com

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