Experimental and Numerical Investigation of CMT Wire and Arc Additive Manufacturing of 2205 Duplex Stainless Steel
Experimental and Numerical Investigation of CMT Wire and Arc Additive Manufacturing of 2205 Duplex Stainless Steel
复制标题
2205双相不锈钢CMT线材和电弧增材制造的实验和数值研究
DOI：
10.3390/coatings12121971
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发表时间：
2022
期刊：
影响因子：
3.4
通讯作者：
Chen Jiao
中科院分区：
文献类型：
--
作者：
Yu Yuan;Ruifeng Li;Xiaolin Bi;Jiayang Gu;Chen Jiao
研究了冷金属转移(CMT)焊丝和电弧添加剂制造2205双相不锈钢的力学性能、显微硬度和金相组织。结果表明，往复式外加剂沿建筑方向的极限抗拉强度、屈服强度和断裂伸长率分别为856.73、710.5和42.35%。另外，实验中选取了同向运动(SDM)和往复运动(RM)作为参数变量，利用ABAQUS软件建立了有限元模型，对不同路径下添加剂成形的温度和残余应力场进行了测试和模拟。首先，通过将模拟结果的实验结果与单道次附加试件横截面的宏观形貌进行比较，验证了所选有限元模型的准确性。数值模拟结果表明，由于添加剂扫描路径的不同，其温度场分布有较大差异，且随着沉积层的增加，SDM添加剂的热积累大于RM，从而使SDM添加剂在实际的添加剂试件中发生端部塌陷。通过模拟比较不同路径的等效应力分布，发现SDM和RM在垂直方向上的等效应力分布基本相同，最小等效应力出现在沉积层的底部，约为116.5 Mpa，最大等效应力出现在距顶部8 mm处，约为348 Mpa。
In this paper, the mechanical properties, microhardness and metallographic structure of 2205 duplex stainless steel by cold metal transfer (CMT) wire and arc additive manufacturing process are studied. The results show that the ultimate tensile strength, yield strength and elongation at break of reciprocating additive along building direction (BD) are 856.73 MPa, 710.5 MPa and 42.35%, respectively. In addition, the same direction motion (SDM) and reciprocating motion (RM) is selected as parameter variables in the experiment, and the finite element model is established by ABAQUS software, and the temperature and residual stress field of the additive forming at different paths are tested and simulated. Firstly, the accuracy of the selected finite element model was verified by comparing the experimental results from the simulation results to the macroscopic morphology of the cross-section of the single-pass additive specimen. The numerical simulation results show that due to the difference of the additive scanning paths, the distribution of the temperature field has a large difference, and with the increase of the deposited layer, the heat accumulation of the SDM additive is larger than that of the RM, so that the end collapses of the SDM additive will occur in the actual additive specimen. By simulating and comparing the equivalent stress distribution of different paths, the equivalent stress distribution of SDM and RM is approximately the same in the vertical direction, and the minimum of equivalent stress appears at the bottom of the deposition layers, about 116.5 MPa, and the maximum of equivalent stress appears at 8 mm from the top, about 348 MPa.