【2017年整理】气体渗碳淬火件中的氢脆问题.doc

气体渗碳淬火件中的氢脆问题 李志义,，马学文3，李晓澎1，2 （1.重庆义扬机电设备有限公司,重庆 400042; 2.重庆长江工业炉公司, 重庆 401329; 3.株州齿轮公司,湖南 株州 400029) 前言：当我们去有关兄弟工厂和学术交流的时候，不少同志询问我们关于气体淬火件中的氢脆问题，由于在重庆296厂主持兵器用结构钢在表面处理过程中氢脆和应力腐蚀断裂的研究 该项目由重庆296厂李志义、姜相荣、袁纪良，包头52所王来生、王明美、厉小东等高工、清华大学顾家琳教授、中科院沈阳金属研究所王毓麟研究员和杜金山高工共同完成，首创145℃高温浓碱介质中悬臂弯曲试验，系统地测试了十种钢在不同表面处理方法及不同工艺规范下材料的缺口强度和应力腐蚀门槛应力强度因子，同时测定上述钢的氢行为，包括吸氢量、氢扩散系数、氢逸出规律、电化学特性、检测氢与某些元素的交互作用，宏观和微观断口分析等），经7312个试样8年研究获部级二等奖，该项技术属国内首例，对于机械行业产品失效分析具有重要的指导作用。academic exchanges, because we have made deep research in Hydrogen brittleness and stress corrosion fracture in structural steel for weapons with surface treatment. The research was completed by the senior engineers of Li Zhiyi, Jiang Xiangrong, Yuan Jiliang, working in Chongqing 296 factory, and Wang laisheng, Wang Mingmei, Li Xiaodong, working in 52 research institute in Paotou, and Pro. Gu Jialin in Tsinghua University, and research fellow Wang Yulin, Du jinshan in Academia Sinic Shenyang Institute of Metal Research. Cantilever bending test was succeeded firstly in high temperature concentrated alkali medium at 145℃. And the notch strength and stress corrosion critical stress intensity factor were tested systematically in 10 types of steels which were different in ways and process specifications of surface treatment. The behaviors of hydrogen (including capacity of hydrogen absorption, diffusion coefficient of hydrogen, escape regularity of hydrogen, electrochemical character, test of interaction between hydrogen and some other element, and macro- and micro-fracture analysis ) in the steels were tested simultaneously. This technology, which has been obtained the second prize of ministry-level, and also which is the first one in China, was worked over 8 years and researched through 7,312 samples. It is placed an important role on failure analysis of product in mechanical industries. The researches of the hydrogen brittleness in carburizing quenching pieces are always so few……. Now I have been retired for 13 years, and I a