RESEARCH ON TREATING PROCEDURE OF EQUIAXED GRAIN CRYSTALLIZING FOR AUSTENITIC STAINLESS STEEL WELDING
摘 要
为了改善焊管的耐腐蚀性和力学性能,将奥氏体不锈钢对接焊管经过拉拔减径预变形后,再用适当温度退火处理,从而使焊缝组织实现再结晶,即以不具方向性的等轴晶组织取代具有方向性很强的柱状晶(或柱状树枝晶)组织。结果表明,已等轴晶化的焊缝,不仅在组织形貌上变得和母材基本一致,而且耐腐蚀性也得到了提高。为了保证焊缝组织完全转变为细小的等轴晶组织,预变形量应在9.4%以上的减径率,并且最佳退火温区应在980~1 000℃以内。
Abstract
In order to improve the corrosion-resistance and the mechanical properties of the welded pipe, the austenitic stainless steel butt welded pipe has been made to undergo a diameter reduction pre-deformation drawing and an annealing treatment at proper temperature. As a result of these, the welding seam structure recrystallization has occurred, ie the equiaxed grain structure has replaced the strongly directional columnar grain stucture (or columnar branch grain), namely, equiaxed grain crystallization. The results also show, equiaxed grain crystallized weld not only becomes consistent with the matrix in microstructure appearance on the whole, but also becomes improved in corrosion-resistance. For the purpose of insuring the welding structure to be changed into fine equiaxed grain completely, the pre-deformation amount of the reduction diameter rate must be great than 9.40%, and the optimum annealing temperature zone should be within 980~1 000℃.
中图分类号 TG142.71
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收稿日期 2005/7/29
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备注夏承钰(1948-),女,高级工程师,学士。
引用该论文: XIA Cheng-yu,XU Lei,LIU Xiao-bo,ZHU Guang-yu. RESEARCH ON TREATING PROCEDURE OF EQUIAXED GRAIN CRYSTALLIZING FOR AUSTENITIC STAINLESS STEEL WELDING[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2006, 42(5): 224~227
夏承钰,徐磊,刘晓波,朱广宇. 奥氏体不锈钢焊缝组织等轴晶化处理方法的研究[J]. 理化检验-物理分册, 2006, 42(5): 224~227
被引情况:
【1】梁磊,张建良,李小利,赵阳,刘世宏, "溴化锂机组不锈钢焊接管腐蚀失效的原因",腐蚀与防护 36, 1198-1201(2015)
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参考文献
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【3】[德]埃里希·福克哈德,栗卓新,朱学军译.不锈钢焊接冶金[M].北京:化学工业出版社, 2004.
【4】刘国勋主编.金属学原理[M].北京:冶金工业出版社北, 1980.270-282,333-339.
【5】吴武楠.18-8奥氏体不锈钢、弹簧钢丝强化工艺研究[A].第七届全国 不锈钢钢年会论文集[C].北京:原子能出版社, 1988.
【6】翁宇庆.超细晶钢——钢的组织细化理论与控制技术[M].北京:冶金工业出版社, 2003.137.
【7】刘建潮.氢及形变对Fe-Cr-Ni-Mn-N系不锈钢组织和性能的影响[A].第七届全国不锈钢年会论文集[C].北京:原子能出版社, 1988.
【8】A 249/A 249M-03, Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes[S].
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