690合金锻造棒材中的细晶带对成品管组织的影响
Influence of Fine-Grain Bands in Forged 690 Alloy Bars on Microstructure of Final Tubes
摘 要
对核电蒸汽发生器传热管用690合金锻造棒材按热挤压过程中的加热工艺进行热处理, 并按传热管制管工艺制备了退火态中间管和特殊热处理(TT)态成品管, 分析了棒材组织中的细晶带对不同状态管材显微组织影响。结果表明: 锻造棒材中碳化物析出的不均匀性是导致出现细晶带的主要原因; 锻造棒材细晶带中碳化物的不均匀析出, 对后续加工过程中的管材组织均匀性产生不利影响, 使传热管成品组织中碳化物析出同样存在不均匀性, 最终造成成品管局部组织的不均匀。
锻造棒材
细晶带
传热管
碳化物
690 alloy
forging bar
fine-grain banding
heat-exchange tube
carbide
Abstract
Heat treatment experiments were conducted on forged 690 alloy bars for heat-exchange tubes of steam generator in nuclear power plant according to hot extrusion heating process. Annealed intermediate tubes and thermal-treatment final tubes were prepared using product process for heat-exchange tubes. The microstructure of the samples at different states were analyzed. The results show that the non-homogeneous precipitation of carbides was the main reason for abnormal fine-grain bands existing in the microstructure of forged bars. The abnormal fine-grain bands in forged bars would have adverse effects on the microstructure uniformity of 690 alloy tubes in succeeding processions and result in non-homogeneous precipitation of carbides in the thermal-treatment final tubes.
中图分类号 TG113.12
所属栏目 试验研究
基金项目 蔡志刚(1978-), 男, 浙江湖州人, 工程师, 硕士。
收稿日期 2014/8/27
修改稿日期 2015/2/1
网络出版日期
作者单位点击查看
引用该论文: CAI Zhi-gang,WANG Yong-dong,SU Cheng,CAO Ping. Influence of Fine-Grain Bands in Forged 690 Alloy Bars on Microstructure of Final Tubes[J]. Materials for mechancial engineering, 2015, 39(4): 48～52
蔡志刚,王永东,苏诚,曹萍. 690合金锻造棒材中的细晶带对成品管组织的影响[J]. 机械工程材料, 2015, 39(4): 48～52
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参考文献
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【4】丰涵, 宋志刚, 郑文杰, 等.固溶处理对Inconel690 合金组织和力学性能的影响［J］.钢铁研究学报, 2009,21(3):46-50.
【5】李强, 周邦新. 690 合金的显微组织研究［J］.金属学报,2001,37 (1): 8-11.
【6】KAI J J, YU G P, TSAI C H, et al. The effects of heat treatment on the chromium depletion, precipitate evolution, and corrosion resistance of Inconel690 alloy［J］.Metallurgical Transactions: A,1989,20:2057-2059.
【7】LIM Y S, KIM J S, KIM H P, et al. The effect of grain boundary misorientation on the intergranular M23C6 carbide precipitation in thermally treated alloy 690［J］.Journal of Nuclear Materials, 2004, 335:108-114.
【8】徐颖, 孙宝德, 王浩伟, 等.热处理对690合金抗腐蚀性能影响综述［J］.核动力工程,1995, 16(5):459-461.
【9】焦少阳, 路晓晖, 王坤,等.核电站热交换器用换热直管的生产工艺及性能［J］.机械工程材料, 2013,37(3): 46-48.
【10】GORMAN J. Guidelines for PWR steam generator tubing specifications and repair, volume 2, revision 1: guidelines for procurement of alloy 690 steam generator tubing［R］.Mclean, Virginia in USA: EPRI, 1999:66-68.
【2】邱绍宇, 苏兴万, 文燕, 等.热处理对690合金腐蚀性能影响的试验研究［J］.核动力工程, 1995, 16(4):336-340.
【3】朱红, 董建新, 张麦仓, 等.固溶处理对Inconel690合金组织影响［J］.北京科技大学学报, 2002,24(5):511-513.
【4】丰涵, 宋志刚, 郑文杰, 等.固溶处理对Inconel690 合金组织和力学性能的影响［J］.钢铁研究学报, 2009,21(3):46-50.
【5】李强, 周邦新. 690 合金的显微组织研究［J］.金属学报,2001,37 (1): 8-11.
【6】KAI J J, YU G P, TSAI C H, et al. The effects of heat treatment on the chromium depletion, precipitate evolution, and corrosion resistance of Inconel690 alloy［J］.Metallurgical Transactions: A,1989,20:2057-2059.
【7】LIM Y S, KIM J S, KIM H P, et al. The effect of grain boundary misorientation on the intergranular M23C6 carbide precipitation in thermally treated alloy 690［J］.Journal of Nuclear Materials, 2004, 335:108-114.
【8】徐颖, 孙宝德, 王浩伟, 等.热处理对690合金抗腐蚀性能影响综述［J］.核动力工程,1995, 16(5):459-461.
【9】焦少阳, 路晓晖, 王坤,等.核电站热交换器用换热直管的生产工艺及性能［J］.机械工程材料, 2013,37(3): 46-48.
【10】GORMAN J. Guidelines for PWR steam generator tubing specifications and repair, volume 2, revision 1: guidelines for procurement of alloy 690 steam generator tubing［R］.Mclean, Virginia in USA: EPRI, 1999:66-68.
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