应力对G115马氏体耐热钢晶界特性的影响
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摘要
研究了应力对新型G115马氏体耐热钢晶界特性的影响。通过对G115钢650℃/120 MPa持久断裂试样进行分析,结果表明,在应力作用下,析出相尺寸增大,数量减少,特别是大尺寸的析出相数量较多,而小尺寸的析出相数量较少;马氏体板条回复速度加快,呈多边形化,即形成亚晶;同时20°～50°晶界增多,大、小角晶界界面数量均增加。
Effect of stress on grain boundary characteristic in a new martensitic heat-resistant steel G115 was investigated. The creep ruptured specimen of G115 steel with the test condition of 650 ℃/120 MPa was analyzed. The results show that the size of precipitations increases and their quantity decreases under the stress. In particular,the quantity of precipitation with a large size is more,but with a small size is less. The recovery rate of the martensite laths is accelerated and is polygonalized. therefore,subgrains are formed. Meanwhile,the grain boundary with angle 20°-50° increases,and the amount of both the high angle grain boundaries and low angle grain boundaries increases.
Effect of stress on grain boundary characteristic in a new martensitic heat-resistant steel G115 was investigated. The creep ruptured specimen of G115 steel with the test condition of 650 ℃/120 MPa was analyzed. The results show that the size of precipitations increases and their quantity decreases under the stress. In particular,the quantity of precipitation with a large size is more,but with a small size is less. The recovery rate of the martensite laths is accelerated and is polygonalized. therefore,subgrains are formed. Meanwhile,the grain boundary with angle 20°-50° increases,and the amount of both the high angle grain boundaries and low angle grain boundaries increases.
引文
[1]GB/T 5310—2017.高压锅炉用无缝钢管[S].
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[9]马龙腾,刘正东,白银.二次正火处理对9Cr3W3Co钢微观组织和冲击韧性的影响[J].金属热处理,2017,42(3):1-6.Ma Longteng,Liu Zhengdong,Bai Yin. Effect of doubled normalization on microstructure and impact toughness of 9Cr3W3Co steel[J]. Heat Treatment of Metals,2017,42(3):1-6.
[10]李海昭,梁军,周超,等.正火温度对G115钢组织及650℃强度的影响[J].金属热处理,2018,43(2):173-177.Li Haizhao, Liang Jun, Zhou Chao, et al. Effect of normalizing temperature on microstructure of G115 steel and strength at 650℃[J]. Heat Treatment of Metals,2017,43(2):173-177.
[11]余永宁.金属学原理[M].北京:冶金工业出版社,2000.
[12]陈正宗,刘正东,包汉生,等.固溶温度对新型耐热合金晶界特性的影响G[J].金属热处理,2017,43(1):36-39.Chen Zhengzong,Liu Zhengdong,Bao Hansheng,et al. Effect of solution temperature on grain boundary Characteristic in new heatresistant alloy[J]. Heat Treatment of Metals,2017,43(1):
[2]刘正东,程世长,包汉生等.蒸汽温度超超临界火电机组用钢及制备方法:中国,ZL 201210574445. 1.[P]. 2013-04-17.Liu Zhengdong,Cheng Shichang,Bao Hansheng,et al. Steel for USC power plants and its preparation method:China,ZL 201210574445. 1.[P]. 2013-04-17.
[3]平田弘征,吉泽满,小川和博,等.铁素体类耐热钢:中国,CN101680065 B[P]. 2011-11-16.Hirata H,Yoshizawa M,Ono T,et al. Ferritic heat-resistant steel:China,CN 101680065 B[P]. 2011-11-16.
[4]Yan P,Liu Z D,Liu W,et al. Hot deformation behavior of a new 9%Cr heat resistant steel G115[J]. Journal of Iron and Steel Research,International,2013,20(9):73-79.
[5]Yan P,Liu Z D,Bao H S,et al. Effect of microstructural evolution of high temperature strength of 9Cr-3W-3Co martensitic heat resistant steel under different aging conditions[J]. Materials Science and Engineering A,2013,588:22-28.
[6]Yan P,Liu Z D,Bao H S,et al. Effect of normalizing temperature on the strength of 9Cr-3W-3Co martensitic heat resistant steel[J].Materials Science and Engineering A,2013,588:148-156.
[7]Yan P,Liu Z D,Bao H S,et al. Effect of tempering temperature on the toughness of 9Cr-3W-3Co martensitic heat resistant steel[J].Materials and Design,2014,54:874-879.
[8]Liu Zhengdong,Bao Hansheng,Chen Zhengzong,et al. Creep strength and oxidation resistance of industrially made G115 steel pipe[C]//Energy Materials. 2017:153-159.
[9]马龙腾,刘正东,白银.二次正火处理对9Cr3W3Co钢微观组织和冲击韧性的影响[J].金属热处理,2017,42(3):1-6.Ma Longteng,Liu Zhengdong,Bai Yin. Effect of doubled normalization on microstructure and impact toughness of 9Cr3W3Co steel[J]. Heat Treatment of Metals,2017,42(3):1-6.
[10]李海昭,梁军,周超,等.正火温度对G115钢组织及650℃强度的影响[J].金属热处理,2018,43(2):173-177.Li Haizhao, Liang Jun, Zhou Chao, et al. Effect of normalizing temperature on microstructure of G115 steel and strength at 650℃[J]. Heat Treatment of Metals,2017,43(2):173-177.
[11]余永宁.金属学原理[M].北京:冶金工业出版社,2000.
[12]陈正宗,刘正东,包汉生,等.固溶温度对新型耐热合金晶界特性的影响G[J].金属热处理,2017,43(1):36-39.Chen Zhengzong,Liu Zhengdong,Bao Hansheng,et al. Effect of solution temperature on grain boundary Characteristic in new heatresistant alloy[J]. Heat Treatment of Metals,2017,43(1):