Microstructure and Mechanical Properties of Overlapping Layered Heterostructured Materials Fabricated by CMT Additive Manufacturing

ZHANG Qi; WANG Xiaoli; ZHOU Zibo; XIAO Nan; DING Hongyu; HU Qingxian

doi:10.7512/j.issn.1001-2303.2025.10.08

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Microstructure and Mechanical Properties of Overlapping Layered Heterostructured Materials Fabricated by CMT Additive Manufacturing
Vol. 55, Issue 10, Pages: 66-76(2025)
Received：28 August 2025，

Published：20 October 2025
DOI： 10.7512/j.issn.1001-2303.2025.10.08
稿件说明：

移动端阅览

张琪，王晓丽，周子博，等.CMT电弧增材制备交叠层状异质材料的微观结构和机械性能［J］.电焊机，2025，55（10）：66-76. DOI： 10.7512/j.issn.1001-2303.2025.10.08.

ZHANG Qi, WANG Xiaoli, ZHOU Zibo, et al.Microstructure and Mechanical Properties of Overlapping Layered Heterostructured Materials Fabricated by CMT Additive Manufacturing[J].Electric Welding Machine, 2025, 55(10): 66-76. DOI： 10.7512/j.issn.1001-2303.2025.10.08.

摘要

异质材料增材制造作为增材制造领域的一个前沿方向，通过一体化的结构功能设计，克服了单一材料的性能局限，实现了传统单一材料无法达到的综合性能。本研究中，采用冷金属过渡电弧增材制造（CMT-WAAM）技术，利用高强钢（HSS）和低碳钢（LCS）焊丝，采用正交沉积策略制备了交叠层状异质金属（OLH）试样，成形良好且无明显冶金缺陷。HSS试样中主要为针状马氏体，LCS试样中主要为多边铁素体，而在OLH试样中，HSS区域主要为马氏体和部分铁素体，LCS区域主要为铁素体和部分马氏体。OLH试样中HSS区硬度约为340.7 HV，与HSS试样硬度（326.0 HV）接近，而LCS区硬度约为245.9 HV，相较于LCS试样硬度（171.1 HV）提高143.8%。OLH试样结合了HSS 试样的抗拉强度和 LCS 试样的延展性，拉伸性能介于HSS和LCS试样之间。

Abstract

Heterogeneous materials additive manufacturing represents a cutting-edge direction in the additive manufacturing field. Its core significance lies in overcoming the performance limitations of single materials and achieving comprehensive properties unattainable with traditional materials through spatially integrated structural functional design. In this study

utilizing cold metal transfer wire arc additive manufacturing (CMT-WAAM) technology

samples of high-strength steel (HSS)

low-carbon steel (LCS)

and overlapping layered heterogeneous (OLH) were fabricated. Macroscopic and microscopic examinations revealed no significant defects. In the OLH samples

the HSS regions developed predominantly ferrite

while the LCS regions formed martensite. The HSS zones showed comparable hardness (340.7 HV) to monolithic HSS (326.0 HV). In contrast

the LCS zones exhibited a 143.8% increase in hardness (245.9 HV) compared to monolithic LCS (171.1 HV). The OLH samples combined HSS-grade tensile strength with LCS-level ductility.

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