西南交通大学学报Issue(5)：862-868,7.DOI:10.3969/j.issn.0258-2724.2014.05.019
工业纯锆焊缝金相组织和力学性能
Metallurgical Structure and Mechanical Properties Test of Weld-Joint of Industrial Pure Zirconium
摘要
Abstract
The element distribution,metallurgical structure and mechanical properties in different parts as base-zone,heat-treatment zone,and welded seam in butt-jointed seam of industrial pure zirconium R60702 welded with TIG was analyzed using optical microscope,electron probe and micro-hardness tester to study the relationship of microstructure and mechanical properties. The results show that different zones of the butt-jointed seam have different metallurgical structures:the crystalline grains in the base metal are equiaxed and surface textured;smaller and equiaxed grains in incomplete recrystallization zone create better mechanical properties in strength and plasticity;coarse grains are found in over-heated zone;and the casting organization with fibre structure is obtained in welded seam zone. The elements distribute uniformly in the butt-welded seam without obvious segregation. The hardness distribution in the butt-jointed seam between the base metal to the welded seam zone is depicted as W-shape:the maximum micro-hardness reaches 290 HV50 g at the position of welded seam, the minimum harness is located in the overheated zone with a value of 162 HV50 g ,and the hardness of over-heated zone fall in between.关键词
R60702/焊接/金相组织/力学性能/元素分布Key words
R60702/welding/metallurgical structure/mechanical properties/element distribution分类
矿业与冶金引用本文复制引用
胡效东,姜迪,李亚江..工业纯锆焊缝金相组织和力学性能[J].西南交通大学学报,2014,(5):862-868,7.基金项目
中国博士后科学基金资助项目 （）
