Purpose

This paper aims to summarize the influence law of hybrid deposited and micro-rolling (HDMR) technology on the shaping strain and residual stress. And the rolling parameters combination was further optimized to guide the actual production.

Design/methodology/approach

This paper proposed a three-dimensional coupled thermo-mechanical model of the HDMR process. The validated model is used to investigate the influences of rolling parameters on stress and plastic strain (the distance between the energy source and roller [D_e–r], the rolling compression [c_r] and the friction coefficient [f_r]). The orthogonal optimization of three factors and three levels was carried out. The influence of rolling parameters on the plastic strain and residual stress is analyzed.

Findings

The simulation results show that HDMR technology can effectively increase the shaping strain of the weld bead and reduce the residual tensile stress on the weld bead surface. Furthermore, the influence of rolling parameters on stress and strain is obtained by orthogonal analysis, and the corresponding optimal combination is proposed. Also, the rolling temperature significantly affects the residual stress, and the rolling reduction has a substantial effect on the plastic deformation.

Research limitations/implications

Owing to the choice of research methods, this paper failed to study microstructure evolution.

Originality/value

This paper provides a reference principle for the optimal selection of rolling parameters in HDMR.

中文翻译：

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工艺参数对复合沉积微轧应力应变的影响

目的

本文旨在总结混合沉积微滚轧(HDMR)技术对成形应变和残余应力的影响规律。并进一步优化轧制参数组合，指导实际生产。

设计/方法/方法

本文提出了 HDMR 过程的三维耦合热机械模型。经验证的模型被用于研究上滚动应力和塑性应变（能量源和辊[之间的距离参数的影响d _È-R ]，轧制压缩[ C ^ _{- [R} ]和摩擦系数[ ˚F _{- [R} ]）。进行了三因素三个水平的正交优化。分析了轧制参数对塑性应变和残余应力的影响。

发现

仿真结果表明，HDMR技术可以有效增加焊道成形应变，降低焊道表面残余拉应力。进一步通过正交分析得到轧制参数对应力应变的影响，并提出相应的优化组合。此外，轧制温度显着影响残余应力，轧制压下率对塑性变形有显着影响。

研究限制/影响

由于研究方法的选择，本文未能研究微观结构演化。

原创性/价值

本文为HDMR中滚动参数的优化选择提供了参考原则。