Huang Sheng, Li Dichen, Zhang Lianzhong, Zhang Xiaoyu, Zhu Weijun
State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Materials (Basel). 2019 Jan 29;12(3):410. doi: 10.3390/ma12030410.
The effects of different ratios of 410L alloy and Fe⁻Cr⁻B⁻Si⁻Mo alloy powders on the microstructure and mechanical properties of laser cladding-deposited ferrous alloys were investigated. The experimental results revealed that the 410L alloy had good strength and excellent ductility due to its microstructure consisting of large elongated ferrite dendrites surrounded by a small number of martensite grains, while the Fe⁻Cr⁻B⁻Si⁻Mo alloy had high strength and poor ductility because of its eutectic microstructure composed of ferrite and Fe₂B/Cr₂B. As the concentration of Fe⁻Cr⁻B⁻Si⁻Mo alloy powder added to the 410L alloy powder increased, the ferrite grains became finer and the volume fraction of the eutectic increased, which eventually improved the strength and reduced the plasticity. Then, 410L + 12.5% Fe⁻Cr⁻B⁻Si⁻Mo alloy powder was successfully deposited onto AISI 1060 steel substrate via laser cladding deposition, and the mechanical properties met those of the substrate, which verified that tailoring the mechanical properties of the laser cladding-deposited alloys with a mixture of 410L and Fe⁻Cr⁻B⁻Si⁻Mo alloy powders for steel repairing applications is a feasible solution.
研究了410L合金与Fe⁻Cr⁻B⁻Si⁻Mo合金粉末不同比例对激光熔覆沉积铁基合金微观结构和力学性能的影响。实验结果表明，410L合金具有良好的强度和优异的延展性，这归因于其微观结构由大量细长的铁素体枝晶和少量马氏体晶粒组成；而Fe⁻Cr⁻B⁻Si⁻Mo合金由于其由铁素体和Fe₂B/Cr₂B组成的共晶微观结构，具有高强度和较差的延展性。随着添加到410L合金粉末中的Fe⁻Cr⁻B⁻Si⁻Mo合金粉末浓度增加，铁素体晶粒变得更细，共晶体积分数增加，最终提高了强度并降低了塑性。然后，通过激光熔覆沉积将410L + 12.5% Fe⁻Cr⁻B⁻Si⁻Mo合金粉末成功沉积到AISI 1060钢基体上，其力学性能与基体相当，这验证了用410L和Fe⁻Cr⁻B⁻Si⁻Mo合金粉末混合物定制激光熔覆沉积合金的力学性能用于钢修复应用是一种可行的解决方案。
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