摘要
焊接质量是由各焊接参数相互综合作用决定的。通过中心复合设计试验方案,基于响应面法建立了316L不锈钢冷金属过渡(CMT)焊接参数(焊接电流、焊接速度、保护气流量和弧长修正值)与焊缝成形尺寸(熔深、熔宽、余高)之间的数学模型,分析了各焊接参数对焊缝成形的影响,得出较优的焊接参数。结果表明:所建立的模型能够反映焊接参数与焊缝成形尺寸之间的关系,能够用于焊缝成形的预测,得到了焊接参数对焊缝成形质量的影响规律;在本试验条件下,保护气流量和焊接速度的交互作用对焊缝熔深有显著的影响,焊接电流与弧长修正值的交互作用对焊缝余高有显著的影响。优化后模型所得焊缝的尺寸与实际试验得到的焊缝尺寸误差分别为:熔深为7.8%、熔宽为2.0%以及余高为4.9%。采用最优的焊接参数制备的增材件成形性良好,室温抗拉强度可高达555.3 MPa,断后伸长率最大为40.7%,强度和塑性均满足铸造性能指标。
Welding quality is determined by the comprehensive interaction of various welding parameters.The mathematical model between cold metal transfer(CMT)welding parameters(welding current,welding speed,shielding gas flow and arc length correction value)and weld formation size(penetration,weld width,weld reinforcement)of 316L stainless steel was established based on response surface methodology through the central composite design test scheme.The influence of welding parameters on weld formation was analyzed,and the optimal welding parameters were obtained.The results show that the established model can reflect the relationship between welding parameters and weld formation size,and can be used to predict weld forming.The influence of welding parameters on weld forming quality is obtained.Under this test condition,the interaction of shielding gas flow and welding speed has a significant impact on weld penetration,and the interaction of welding current and arc length correction value has a significant impact on weld reinforcement.The weld size error between the optimized model and the actual test is 7.8%for penetration,2.0%for width and 4.9%for reinforcement.The additive parts prepared with the optimal welding parameters have good formability,the tensile strength at room temperature can reach 555.3 MPa,the maximum elongation is 40.7%,and the strength and plasticity meet the casting performance index.
作者
黄佳欣
任香会
于振涛
韩善果
HUANG Jia-xin;REN Xiang-hui;YU Zhen-tao;HAN Shan-guo(Institute of Advanced Abrasive Resistance and Functional Materials,Jinan University,Guangzhou 510635,China;Guangdong Provincial Key Laboratory of Advanced Welding Technology,China-Ukraine Institute of Welding,Guangdong Academy of Sciences,Guangzhou 510650,China;Yangjiang Zhongwu batton Technology Research Institute,Yangjiang 529533,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2023年第3期205-216,共12页
Transactions of Materials and Heat Treatment
基金
广东省科技计划项目(2022B1212050001)
广州市对外科技合作项目(201907010006)
阳江市科技专项资金项目(SDZX2020007)
阳江市重大科技创新项目(SDZX2021010)。
关键词
316L不锈钢
响应面法
CMT
焊缝成形尺寸
性能
316L stainless steel
responsive surface methodology
CMT
weld formation size
property
作者简介
黄佳欣(1997-),女,硕士研究生,主要从事增材制造成形工艺研究,E-mail:1326618854@qq.com;通信作者:任香会(1981-),女,高级工程师,主要从事电弧增材制造研究,E-mail:13128609002@163.com。
