摘要
采用CT643钎料、高频钎焊工艺对排锯进行焊接试验,研究钎焊时间对排锯性能的影响。用万能力学试验机、电子显微镜测试钎焊接头的剪切强度和组织形貌,体式显微镜测量钢基侧钎料的钎着面积,金相显微镜、洛氏硬度计对比分析热影响区的组织和硬度变化。结果表明:钎焊时间延长,热影响区接头的剪切强度逐渐降低、组织的晶粒长大并形成回火屈氏体,且钢基体钎料的钎着面积逐渐降低,热影响区尺寸增大、硬度降低;当钎焊时间为1.8 s时,CT643钎料渗入钢基体约90μm,钢基体向钎料界面扩散反应形成高度约10μm的竹笋状突起。
CT643 brazfing filler was used to conduct welding experiments on row saw through high frequency brazing.The effect of brazing time on the performance of row saw was studied.The shear strength and morphology of the brazed joint were tested by universal capability testing machine and electron microscope.The brazing area of the solder beside the steel matrix was measured by body microscope.The microstructure and hardness of the heat affected zone were compared and analyzed by metallographic microscope and Rockwell hardness tester.The results show that with the increase of brazing time,the shear strength of joints decreases gradually,and the grain size at the heat affected zone grows to form tempered troostite.In addition,the brazing area of steel matrix decreases,and the area of heat affected zone increases with decreased hardness.When the brazing time was 1.8 s,the CT643 solder infiltrates into the steel matrix for about 90μm,while the steel matrix diffuses to the solder interface to form bamboo shoot-like protrusions with a height of about 10μm.
作者
于奇
李振
于新泉
鲍丽
马佳
潘建军
龙伟民
YU Qi;LI Zhen;YU Xinquan;BAO Li;MA Jia;PAN Jianjun;LONG Weimin(State Key Laboratory of Advanced Brazing Filler Metals and Technology,Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 45001,China;Zhengzhou Emerging Industry Technology Research and Promotion Center,Zhengzhou 45000,China)
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2019年第6期43-47,共5页
Diamond & Abrasives Engineering
基金
国家重大科技04专项“高档数控机床与基础制造设备——汽车发动机缸体缸盖生产用超硬刀具国产化示范应用(SK201901A31–04)”
关键词
排锯钎焊
钎焊时间
钎着面积
热影响区
row saw brazing
brazing time
brazing area
heat affected zone
