焊后回火温度对G115钢熔敷金属组织及室温力学性能的影响

doi:10.13251/j.issn.0254-6051.2021.10.035

金属热处理 ›› 2021, Vol. 46 ›› Issue (10): 199-203.DOI: 10.13251/j.issn.0254-6051.2021.10.035

焊后回火温度对G115钢熔敷金属组织及室温力学性能的影响

齐向前

天津海运职业学院工程技术系, 天津 300372

收稿日期:2021-06-04 出版日期:2021-10-25 发布日期:2021-12-08
作者简介:齐向前(1978—),男,高级工程师,主要研究方向为金属材料及无损检测技术,E-mail: qixiang_qian@126.com
基金资助:
天津市津南区科技补贴项目(201805012)

Effect of post-weld tempering temperature on microstructure and room temperature mechanical properties of G115 steel deposited metal

Qi Xiangqian

Engineering Technology Department, Tianjin Maritime College, Tianjin 300372, China

Received:2021-06-04 Online:2021-10-25 Published:2021-12-08

摘要/Abstract

摘要： 采用G115钢焊条焊接了熔敷金属试板,然后分别在760、780、800、820 ℃下进行了焊后回火热处理,并对不同回火温度下试样的力学性能和显微组织进行了分析。结果表明,G115钢熔敷金属的最佳回火温度为800 ℃,随着回火温度的升高,析出相M₂₃C₆有长大的趋势。760~820 ℃回火后的冲击断口表现为韧窝断裂和准解理断裂特征,在韧窝内存在焊接冶金脱氧过程中形成的球形第二相粒子。

关键词: G115钢, 熔敷金属, 回火, 马氏体, 力学性能, 微观组织

Abstract: G115 steel filler rod was welded on a steel test plate, and then the post-weld tempering for the plate was carried out at 760, 780, 800 and 820 ℃, respectively. The mechanical properties and microstructure of the weld-deposited steel plate under different tempering temperatures were analyzed. The results show that the best tempering temperature of the G115 steel deposited on the plate is 800 ℃. With the increases of the tempering temperature, the precipitation phase M₂₃C₆ has a growing-up trend. The impact fracture of the steel plate tempered at 760-820 ℃ is characterized by dimple fracture and quasi-cleavage fracture. Spherical second phase particles are observed in the dimples which formed during the deoxidation reaction in welding metallurgy process.

Key words: G115 steel, deposited metal, tempering, martensite, mechanical properties, microstructure

中图分类号:

TG142.73

齐向前. 焊后回火温度对G115钢熔敷金属组织及室温力学性能的影响[J]. 金属热处理, 2021, 46(10): 199-203.

Qi Xiangqian. Effect of post-weld tempering temperature on microstructure and room temperature mechanical properties of G115 steel deposited metal[J]. Heat Treatment of Metals, 2021, 46(10): 199-203.

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焊后回火温度对G115钢熔敷金属组织及室温力学性能的影响

Effect of post-weld tempering temperature on microstructure and room temperature mechanical properties of G115 steel deposited metal

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