Aging Microstructure and Creep Rupture Properties of Super304H Steel Welded Joint
摘 要
对Super304H钢焊接接头进行了700℃保温不同时间(100,300,500 h)的时效处理,研究了其时效组织和冲击性能,并分析了焊接接头在700℃、不同应力下的持久性能。结果表明:700℃时效100 h后,Super304H钢焊接接头奥氏体晶界和枝晶界处析出大量的颗粒状、链球状和条状M23C6析出相,焊接接头的冲击韧性显著下降,随着时效时间的延长,M23C6相的析出速率减慢,冲击功基本保持稳定;焊接接头持久试样均在母材处断裂,且断裂前均发生明显的缩颈现象;当加载应力(180 MPa)较高时,断口主要呈穿晶断裂特征,而当加载应力(160 MPa)较低时,其断裂特征向沿晶断裂转变。
Abstract
Super304H steel welded joint was aged at 700℃ for different times (100, 300, 500 h), and the aging microstructure and impact property of the welded joint was investigated. The creep rupture properties of the welded joint at 700℃ under different stresses were analyzed. The results show that after aging at 700℃ for 100 h, granular, hammer-like and strip-like M23C6 phase precipitated from grain boundaries and dendritic grain boundaries of austenite in the Super304H steel welded joint, and impact toughness of the welded joint decreased apparently. With the increase of aging time, precipitating rate of M23C6 phase slowed down and the impact toughness became stable. The creep rupture sample of welded joint all fractured at the position of base material, and obvious necking occurred before fracture. The fracture mainly showed transgranular characteristic when the loading stress (180 MPa) was relatively high, and changed into intergranular characteristic when the loading stress (160 MPa) was relatively low.
中图分类号 TG142.1 DOI 10.11973/jxgccl201811013
所属栏目 材料性能及应用
基金项目
收稿日期 2017/9/3
修改稿日期 2018/10/17
网络出版日期
作者单位点击查看
备注张忠文(1962-),男,山东烟台人,研究员,硕士
引用该论文: ZHANG Zhongwen,LI Xinmei,DU Baoshuai,LI Zhiming,LI Wen. Aging Microstructure and Creep Rupture Properties of Super304H Steel Welded Joint[J]. Materials for mechancial engineering, 2018, 42(11): 62~66
张忠文,李新梅,杜宝帅,李志明,李文. Super304H钢焊接接头的时效组织及其持久性能[J]. 机械工程材料, 2018, 42(11): 62~66
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】SAWARAGI Y, OGAWA K, KATO S, et al. Development of the economical 18-8 stainless steel(Super304H) having high elevated temperature strength for fossil fired boillers[J]. The Sumitomo Search, 1992, 48(1):50-58.
【2】KAN T, SAWARAGI Y, YAMADERA Y, et al. Properties and experiences of a new austenitic stainless steel Super 304H (0.1C-18Cr-9Ni-3Cu-Nb-N) tubes for boiler tube application[C]//Materials for Advanced Power Engineering. Julich:Forschungsz Entrum Julich Press, 1998:441-450.
【3】SAWARAGI Y, OTSUKA N, SENBA H, et al. Properties of a new 18-8 austenitic steel tube (Super 304H) for fossil fired boilers after service exposure with high elevated temperature strength[J]. Sumitomo Search, 1994, 56:34-43.
【4】IGARASHI M. Creep properties of heat resistant steels and superalloys[M]. Springer:Springer Berlin Heidelberg, 2004:260-264.
【5】李学峰,张忠文,李新梅,等.超超临界机组用Super304H钢焊接接头的组织和性能[J].电焊机,2016,46(10):108-111.
【6】杨富,章应霖,任永宁,等.新型耐热钢焊接[M].北京:中国电力出版社,2006.
【7】李新梅,邹勇,邹增大,等. Super304H钢焊接接头时效脆化机理[J].焊接学报,2011,32(2):1-4, 24.
【8】肖纪美.不锈钢的金属学问题[M].北京:冶金工业出版社,2006:61-74.
【9】张忠文,李新梅,杜宝帅,等. 时效温度对Super304H钢焊缝金属组织和韧性影响[J].焊接学报,2011,32(7):43-46.
【10】赵杰.耐热钢持久性能的统计分析及可靠性预测[M].北京:科学出版社,2011:11.
【11】张俊善.材料的高温变形与断裂[M].北京:科学出版社,2007:88.
【2】KAN T, SAWARAGI Y, YAMADERA Y, et al. Properties and experiences of a new austenitic stainless steel Super 304H (0.1C-18Cr-9Ni-3Cu-Nb-N) tubes for boiler tube application[C]//Materials for Advanced Power Engineering. Julich:Forschungsz Entrum Julich Press, 1998:441-450.
【3】SAWARAGI Y, OTSUKA N, SENBA H, et al. Properties of a new 18-8 austenitic steel tube (Super 304H) for fossil fired boilers after service exposure with high elevated temperature strength[J]. Sumitomo Search, 1994, 56:34-43.
【4】IGARASHI M. Creep properties of heat resistant steels and superalloys[M]. Springer:Springer Berlin Heidelberg, 2004:260-264.
【5】李学峰,张忠文,李新梅,等.超超临界机组用Super304H钢焊接接头的组织和性能[J].电焊机,2016,46(10):108-111.
【6】杨富,章应霖,任永宁,等.新型耐热钢焊接[M].北京:中国电力出版社,2006.
【7】李新梅,邹勇,邹增大,等. Super304H钢焊接接头时效脆化机理[J].焊接学报,2011,32(2):1-4, 24.
【8】肖纪美.不锈钢的金属学问题[M].北京:冶金工业出版社,2006:61-74.
【9】张忠文,李新梅,杜宝帅,等. 时效温度对Super304H钢焊缝金属组织和韧性影响[J].焊接学报,2011,32(7):43-46.
【10】赵杰.耐热钢持久性能的统计分析及可靠性预测[M].北京:科学出版社,2011:11.
【11】张俊善.材料的高温变形与断裂[M].北京:科学出版社,2007:88.
相关信息