矿用链轮CMT堆焊工艺特性研究
Study on Process Characteristics of Mining Sprockets CMT Surfacing
DOI: 10.12677/ME.2020.81001, PDF,   
作者: 朱 晗, 张晓超, 高洪明*：哈尔滨工业大学，先进焊接与连接国家重点实验室，黑龙江 哈尔滨 ；董曼淑：宁夏天地奔牛实业集团有限公司，宁夏 石嘴山
关键词: 链轮；磨损失效；CMT；堆焊；表面成形；Sprocket； Wear Failure； CMT； Surfacing； Surface Forming
摘要: 为了提高链轮表面的耐磨性和耐腐蚀性能，提出在链轮表面堆焊一定厚度的马氏体不锈钢材料的工艺方法。针对40CrNiMoA基材，采用耐磨药芯焊丝进行了CMT堆焊工艺试验，研究了预热温度、送丝速度、焊接速度等工艺参数对成形质量、稀释率、界面结合强度及硬度的影响规律。结果表明堆焊层表面形貌与热输入密切相关，堆焊层硬度远大于母材，并且堆焊层与母材的界面结合强度大于母材自身剪切强度，说明堆焊层与母材可以结合良好，为矿用链轮制造提供了技术支撑。
Abstract: In order to improve the wear resistance and corrosion resistance of the sprocket surface, it is proposed to weld a certain thickness of martensitic stainless steel material on the surface of the sprocket. The CMT process test was carried out on the 40CrNiMoA substrate of using wear-resistant flux cored wire, and the influence of process parameters such as preheating temperature, wire feeding speed and welding speed on the forming quality, dilution rate, interface bonding strength and hardness was studied. It is found that macroscopic morphology of the surfacing layer is closely related to the heat input. The hardness of the surfacing layer is much larger than that of the base metal, and the interface bonding strength between the surfacing layer and the base metal is greater than the shear strength of the base material, indicating that the surfacing layer and the base metal can combine well and provide technical support for mine sprocket manufacturing.
文章引用：朱晗, 董曼淑, 张晓超, 高洪明. 矿用链轮CMT堆焊工艺特性研究[J]. 矿山工程, 2020, 8(1): 1-8. https://doi.org/10.12677/ME.2020.81001

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