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M_(23)C_(6)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。
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 M_(23)C_(6) 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.
作者
齐向前
Qi Xiangqian(Engineering Technology Department,Tianjin Maritime College,Tianjin 300372,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2021年第10期199-203,共5页
Heat Treatment of Metals
基金
天津市津南区科技补贴项目(201805012)。
关键词
G115钢
熔敷金属
回火
马氏体
力学性能
微观组织
G115 steel
deposited metal
tempering
martensite
mechanical properties
microstructure