D6A大型锻材白点缺陷探讨及工艺改进  

Discussion on Flakes of D6A Large Forgings and Its Process Improvement

作　　者：丁勇 

机构地区：[1]攀钢集团四川长城特殊钢股份有限公司特冶中心,四川江油621704

出　　处：《特钢技术》2007年第3期38-40,共3页Special Steel Technology

摘　　要：根据D6A钢种探伤合格率低,试制初期探伤合格率仅有30%左右,探伤缺陷主要表现为棒材中心部位密集型缺陷等特点,制定了新的生产工艺及热处理工艺,通过新工艺改进,该钢的探伤合格率已达到80%以上,基本解决了探伤合格率低的问题。Basod on characteristics such as low detection qualification rate, about 30% of detection qualification rate at the beginning of trial - production, detection defects showing mainly as closely packed defects in the central location of bars of D6A steel, this paper made a new production process and heat treatment process, through the process improvement, detection qualification rate of this steel reached above 80%, so the problem of low detection qualification rate was solved basically.

关 键 词：白点 极限氢含量 内应力 

分 类 号：TG316.192[金属学及工艺—金属压力加工]