氢对2.25Cr-1Mo钢回火脆化的影响
Effect of Hydrogen on Temper Embrittlement of 2.25Cr-1Mo Steel
摘 要
对加氢反应器用2.25Cr-1Mo 钢进行了回火脆化并充氢处理;通过冲击试验机、俄歇电子能谱仪及扫描电镜等研究了2.25Cr-1Mo钢在回火脆化与氢脆联合作用下的脆化情况;结合晶界偏聚理论, 计算了在不同回火及充氢处理后杂质磷原子在晶界上的偏聚量。结果表明: 试验钢的脆化程度不能用显微组织、硬度的变化来评价;在回火温度范围内, 随着回火时间的延长, 试验钢回火脆化的程度逐渐增大, 氢进一步增加了其脆化程度, 并且回火脆化与氢脆联合作用下的脆化程度要远大于回火脆化的;氢增大了试验钢中杂质原子磷的扩散系数, 进而促进磷原子向晶界偏聚, 这是充氢加重回火脆化的主要原因。
回火脆化
2.25Cr-1Mo钢
氢脆
晶界偏聚
Auger electron spectrum
temper embrittlement
2.25Cr-1Mo steel
hydrogen embrittlement
grain boundary segregation
Abstract
Tempering and hydrogen charging were carried on a 2.25Cr-1Mo steel used for hydrogenation reaction, and then to study the effect of hydrogen embrittlement and temper embrittlement on embrittlement properties of the steel by impact testing, Auger electron spectrometer testing and scanning electron microscopy testing.Basing on grain boundary segregation theory, the amount of P atom segeration at grain boundaries was calculated after different tempering and hydrogen charging treatments. The results show that the microstructure and hardness could not be used to assess the embrittlement degree of the tested steel. With the increase of tempering time during tempering temperature range, the temper embrittlement gradually increased, and hydrogen charging enlarged embrittlement degree. The effect of combined effects of hydrogen embrittlement and temper embrittlement on embrittlement degree was much more than that of temper embrittlement alone. Hydrogen charging amplified diffusion coefficient of P atom, and thus aggravated element P segeration at grain boundaries, and this was the main reason of hydrogen charging aggravating temper embrittlement.
中图分类号 TG14 TG113 TG156
所属栏目 材料性能及其应用
基金项目
收稿日期 2012/8/12
修改稿日期 2013/6/26
网络出版日期
作者单位点击查看
备注刘涛(1983-), 女, 河北石家庄人, 助教, 硕士。
引用该论文: LIU Tao,ZHANG Xi-liang,LU Bao-cheng,ZHOU Chang-yu. Effect of Hydrogen on Temper Embrittlement of 2.25Cr-1Mo Steel[J]. Materials for mechancial engineering, 2013, 37(9): 49～53
刘涛,张喜亮,卢宝城,周昌玉. 氢对2.25Cr-1Mo钢回火脆化的影响[J]. 机械工程材料, 2013, 37(9): 49～53
被引情况:
【1】刘丹,宋文英,石鹏亮,王存宇, "淬火-配分-回火工艺处理低碳低合金钢的氢脆敏感性",机械工程材料 39, 66-69(2015)
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参考文献
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【11】ZHANG Xi-Liang, ZHOU Chang-yu. Study on mechanism of de-embrittlement based on the theory of grain boundary segregation for 2.25Cr-1Mo steel[J].Materials Science & Engineering A, 2011, 528(13/14): 4287-4291.
【12】谈金祝, 黄文龙.步冷试验法预测2.25Cr-1Mo钢回火脆性[J].南京化工大学学报, 1998, 20(5): 17-20.
【13】王忠堂, 宋鸿武, 周游, 等. Ti600钛合金置氢后激活能及热塑性研究[J].稀有金属, 2009, 33(5): 652-656.
【14】JOHNSON R A, LAM N Q. Solute segregation in metals under irradiation[J].Phys Rev B, 1976, 12/13: 4364-4375.
【15】周游, 王忠堂, 宋鸿武, 等.氢含量及工艺参数对Ti600合金激活能的影响[J].热加工工艺, 2009, 38(4): 20-23.
【16】王征, 王禹华, 李连杰, 等.氢在钢中晶格间隙和氢陷阱之间的扩散模式[J].材料开发与应用, 2009, 24(4): 85-89.
【2】Japan Pressure Vessel Research Congress. Embrittlement of pressure vessure steels in high temperature, high pressure hydrogen enviroment[J].WRC Bulletin, 1985, 305(6): 9-21.
【3】NAKAI Y, YASUHIRO M, YASUYA O. Effect of the degree temper embrittlement on the susceptibility of hydrogen embrittlement[J].Transactions ISIJ, 1982, 22(9): 285-291.
【4】华丽, 朱奎龙, 王志文, 等.2-1/4Cr-1Mo钢抗氢脆性能的研究[J].华东理工大学学报, 2003, 29(6): 621-624.
【5】FURUSAWA J, MAHARAJA Y, OHMORI Y. Temper embrittlement and hydrogen embrittlement of Cr-Mo steel[J].Transactions ISIJ, 1987, 35: 77-82.
【6】NAKANO K, AOKI T, KANEKO M. Hydrogen embrittlement of a temper embrittled 2.25Cr-1Mo steel under slow dynamic loading[J].Transactions ISIJ, 1982, 22(4): 93-99.
【7】大冢秀明, 齐树柏. 2.25Cr-1Mo钢的回火脆化和氢脆化的关系;C]//热壁加氢反应器技术文集. 北京: 中国石化总公司, 1987: 225-229.
【8】HUA Li. Experiment study of temper embrittlement of aged the specimens removed from a hydrogenation reactor[J].Engineering Failure Analysis, 2006, 13(4): 615-623.
【9】MCLEAN D. Grain boundaries in metals[D].London: Oxford University Press, 1957.
【10】GUTTMANN M. Equilibrium segregation in a ternary solution: a model for temper embrittlement[J].Surface Science, 1975, 53: 213-227.
【11】ZHANG Xi-Liang, ZHOU Chang-yu. Study on mechanism of de-embrittlement based on the theory of grain boundary segregation for 2.25Cr-1Mo steel[J].Materials Science & Engineering A, 2011, 528(13/14): 4287-4291.
【12】谈金祝, 黄文龙.步冷试验法预测2.25Cr-1Mo钢回火脆性[J].南京化工大学学报, 1998, 20(5): 17-20.
【13】王忠堂, 宋鸿武, 周游, 等. Ti600钛合金置氢后激活能及热塑性研究[J].稀有金属, 2009, 33(5): 652-656.
【14】JOHNSON R A, LAM N Q. Solute segregation in metals under irradiation[J].Phys Rev B, 1976, 12/13: 4364-4375.
【15】周游, 王忠堂, 宋鸿武, 等.氢含量及工艺参数对Ti600合金激活能的影响[J].热加工工艺, 2009, 38(4): 20-23.
【16】王征, 王禹华, 李连杰, 等.氢在钢中晶格间隙和氢陷阱之间的扩散模式[J].材料开发与应用, 2009, 24(4): 85-89.
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