8620钢的正火工艺研究  

Research on Normalizing Process of 8620 Steel

作　　者：张静[1] 杨杨 

机构地区：[1]天津理工大学中环信息学院,天津300380 [2]西科沃克瑞泰克热处理设备制造有限公司,天津300385

出　　处：《工业炉》2014年第4期59-62,共4页Industrial Furnace

摘　　要：正火能合理调整工件内部的微观缺陷,细化晶粒,提高综合力学性能,而且正火工艺比较低廉,通常采用正火对8620进行预备处理。鉴于现今対8620合金钢的正火处理存在一些问题,如魏氏组织的存在,大块珠光体组织以及晶粒不均匀等影响产品使用寿命。从常规工艺入手,通过改变等温时间和冷却速度,找出各自影响的结果,寻求优化工艺,从而消除金属工件热处理过程中出现的问题,提高产品质量。The normalizing could adjust microscopic defect of part,refined grains,enhances the comprehensive mechanical function,moreover,the normalizing is quite cheap.For the 8620 steel,normalizing is usually taken to do pre-treatment.But some problems of the alloy steel normalizing process have been detected,such as the existence of Wei Shi organizes,bulk pearlyte organization and crystal grain non-uniform and so on.This article starts from the conventional process,then changes holding time and cooling rate,finds out influence factors of each parameter,searches the optimized process,to eliminate the problem which appear in the heat treatment process of metal part and improve the product quality.

关 键 词：8620 20CrNiMo 正火工艺 热处理 

分 类 号：TG156.4[金属学及工艺—热处理]