CMT堆焊15-5PH工艺及组织性能研究

赖书斌; 刘浩然; 庞广超; 段清龙; 赵旭晨; 郭龙龙

doi:10.3969/j.issn.1674-6457.2026.07.014

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精密成形工程 ›› 2026, Vol. 18 ›› Issue (7) : 154-165. DOI: 10.3969/j.issn.1674-6457.2026.07.014

先进连接技术

CMT堆焊15-5PH工艺及组织性能研究

赖书斌¹, 刘浩然², 庞广超¹, 段清龙³, 赵旭晨², 郭龙龙^2,*

作者信息 +

Process, Microstructure and Properties of 15-5PH Cladding Deposited using CMT

LAI Shubin¹, LIU Haoran², PANG Guangchao¹, DUAN Qinglong³, ZHAO Xuchen², GUO Longlong^2,*

Author information +

文章历史 +

摘要

目的针对冷金属过渡（Cold Metal Transfer,CMT）堆焊15-5PH工艺参数优化缺乏试验和数据指导的问题,研究工艺参数对15-5PH堆焊层成形质量、微观组织、力学性能的影响规律。方法以CMT的送丝速度、堆焊速度为变量开展单道堆焊试验,厘清了送丝速度、堆焊速度对堆焊层成形质量的影响规律,探明了工艺参数窗口;在CMT工艺参数窗口内,开展多道堆焊试验,利用光学显微镜分析了堆焊层的微观组织,通过拉伸试验、显微硬度试验测试了堆焊层的力学性能。结果当堆焊速度恒定时,随着送丝速度增加,单焊道宽度增大、高度先升后降;当送丝速度恒定时,随堆焊速度的增加,单焊道宽度、高度均降低;随送丝速度的增加,堆焊层表面波纹度和稀释率均先减小后增大。堆焊层主要由等轴马氏体、少量的柱状马氏体、铁素体和球状碳化物组成;随送丝速度的增加,晶粒尺寸逐渐增大,堆焊层的抗拉强度逐渐增大,显微硬度呈波动变化,伸长率变化不明显。当送丝速度为7 m/min、堆焊速度为5 mm/s时,堆焊层具有良好的成形质量、较高的硬度、相对最优的拉伸性能。结论探明了CMT工艺参数对成形质量、微观组织、力学性能的影响规律,获得了成形质量、力学性能良好的堆焊层。研究成果为CMT堆焊15-5PH的形性调控提供试验和数据支撑。

Abstract

The work aims to investigate the effect of process parameters on forming quality, microstructure, and mechanical properties of 15-5PH cladding layers to overcome the lack of experimental and data support for optimizing the cold metal transfer (CMT) process parameters for 15-5PH cladding. Firstly, single-pass cladding experiments were conducted with wire feed speed and welding speed as variables to clarify the effect of these parameters on forming quality and determine the optimal process parameter window. Within parameters window, multi-pass cladding experiments were performed. Then, microstructure of the cladding layer was analyzed by optical microscopy, and mechanical properties were evaluated through tensile testing and microhardness testing. At a constant welding speed, increasing the wire feed speed resulted in an increase in weld width, with height initially rising and then decreasing. At a constant wire feed speed, increasing the welding speed reduced both weld width and height. As the wire feed speed increased, the surface waviness and dilution rate of the cladding layer first decreased and then increased. The cladding layer primarily consisted of equiaxed martensite, a small amount of columnar martensite, ferrite and spherical carbides. Moreover, with increasing wire feed speed, the grain size gradually increased, the tensile strength of the cladding layer increased gradually, the microhardness showed a fluctuating change, and the elongation changed insignificantly. At a wire feed speed of 7 m/min and a welding speed of 5 mm/s, the cladding layer exhibited excellent forming quality, high hardness, and optimal tensile properties. The effect of CMT process parameters on forming quality, microstructure and mechanical properties is clarified, and high-performance cladding layers with sound forming are successfully prepared. The outcomes provide experimental reference and theoretical data for the shape-performance control of CMT cladding for 15-5PH.

导出引用

赖书斌, 刘浩然, 庞广超, 段清龙, 赵旭晨, 郭龙龙. CMT堆焊15-5PH工艺及组织性能研究[J]. 精密成形工程. 2026, 18(7): 154-165 https://doi.org/10.3969/j.issn.1674-6457.2026.07.014

LAI Shubin, LIU Haoran, PANG Guangchao, DUAN Qinglong, ZHAO Xuchen, GUO Longlong. Process, Microstructure and Properties of 15-5PH Cladding Deposited using CMT[J]. Journal of Netshape Forming Engineering. 2026, 18(7): 154-165 https://doi.org/10.3969/j.issn.1674-6457.2026.07.014

中图分类号： TG455

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