刘俊建,陈国宏,余新海,王家庆,化建,宋有明,张涛,汤文明

• 1:合肥工业大学材料科学与工程学院
• 2:安徽省电力科学研究院
• 3:合肥津利能源科技发展有限公司

摘要(Abstract)：

采用ERNiCr-3和ERNiCrMo-3两种镍基焊丝,用气体保护钨极电弧焊(GTAW)法实现T92/HR3C异种钢管焊接。研究了接头的显微组织及其力学性能,以及焊后热处理对接头组织结构及力学性能的影响等。结果表明:T92/HR3C异种钢接头焊缝为胞状树枝晶组织,T92侧热影响区(HAZ)主要由过热区、粗晶区及细晶区构成;HR3C侧HAZ没有明显晶粒长大的现象,但晶界、晶内有碳、氮化物析出。ERNiCrMo-3焊接接头的强度、塑性及硬度较高,拉伸断裂位于母材;而ERNiCr-3焊接接头强度、硬度较低,但冲击韧性较高,拉伸断裂位于焊缝。760℃、30 min焊后热处理,有助于改善两种焊接接头的综合力学性能。

关键词(KeyWords)： T92钢;HR3C钢;异种钢焊接接头;焊后热处理;组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 安徽省电力科学研究院技术开发基金(2009咨-JS-03);; 安徽省高校自然科学研究重点项目

作者(Author): 刘俊建,陈国宏,余新海,王家庆,化建,宋有明,张涛,汤文明

DOI: 10.13289/j.issn.1009-6264.2011.02.012

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