基于CMT的30CrMo增材再制造工艺及力学性能  

Additive remanufacturing process and mechanical properties of 30CrMo basedon CMT

作　　者：郭龙龙 徐斌荣 刘春伟 王军 刘广阔 曹嘉晨 吴泽兵 GUO Longlong;XU Binrong;LIU Chunwei;WANG Jun;LIU Guangkuo;CAO Jiachen;WU Zebing(Mechanical Engineering College,Xi′an Shiyou University,Xi′an 710065,China;Baoji Oilfield Machinery Co.Ltd.,Baoji 721002,China;Material Corrosion and Protection Key Laboratory of Sichuan Province,Zigong 643000,China)

机构地区：[1]西安石油大学机械工程学院,陕西西安710065 [2]宝鸡石油机械有限责任公司,陕西宝鸡721002 [3]材料腐蚀与防护四川省重点实验室,四川自贡643000

出　　处：《兵器材料科学与工程》2023年第2期29-36,共8页Ordnance Material Science and Engineering

基　　金：国家油气钻井装备工程技术研究中心开放基金(BOMCO J118-JKY016-2023);陕西省教育厅科研计划项目(22JP065);陕西省自然科学基础研究计划(2020JQ-780);材料腐蚀与防护四川省重点实验室开放基金(2022CL27);重庆市轻合金材料与加工工程技术研究中心开放基金(GCZ202001)。

摘　　要：针对30CrMo钢零部件的增材再制造,用金属冷过渡工艺开展单道、多道熔覆试验,分析送丝速度、焊接速度对单焊道宽度和高度的影响规律和机理,构建单道焊成形质量预测模型、横截面轮廓模型,推导焊道间距计算公式,测试熔覆层的力学性能。结果表明:焊接速度恒定时,随送丝速度增加,焊缝宽度先增后减、焊缝高度逐渐增加;送丝速度恒定时,随焊接速度增加,焊缝宽度、高度均减小;建立的模型精度较好,能预测焊缝几何特征和焊道间距;熔覆层的最高抗拉强度为1 238 MPa,最低为1 148 MPa;最大伸长率为6.95%、最小为6.05%。为30CrMo钢的增材再制造提供试验依据和数据参考。For the additive remanufacturing of 30CrMo steel parts,the cold metal transfer(CMT)process was used to carry out single pass and multi pass cladding experiments. The influence rule and mechanism of the welding speed and wire feeding speed on the width and height of the single weld beads were clarified. Moreover,the models,which was used to predict the formation quality and cross section profile of the single weld beads,were established. The calculation formula of weld bead spacing was deduced. Meanwhile,the mechanical properties of cladding was tested. The results show that,when the welding speed is constant,the weld width increases firstly and then decreases,and the weld height gradually increases with the increase of wire feeding speed. However,when the wire feeding speed is constant,the weld width and height both decrease with the increase of welding speed. The established models have good accuracy and can be used to predict the geometric characteristics of the weld and the weld bead spacing. The maximum and minimum tensile strength of the cladding layer are 1 238 MPa and 1 148 MPa,respectively. Meanwhile,the maximum and minimum elongation are 6.95% and 6.05%,respectively. The outcomes of this study provide experimental basis and data reference for additive manufacturing of 30CrMo steel.

关 键 词：30CrMo 成形质量 焊道间距 力学性能 CMT 

分 类 号：TG455[金属学及工艺—焊接]