Tailoring the Mechanical Properties of Laser Cladding-Deposited Ferrous Alloys with a Mixture of 410L Alloy and Fe⁻Cr⁻B⁻Si⁻Mo Alloy Powders.

Sheng Huang,Weijun Zhu,Xiaoyu Zhang,Dichen Li,Lianzhong Zhang

doi:10.3390/ma12030410

Abstract

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.

Highlights

Many defective components, which are mis-machined in the manufacturing process or locally worn in the service process, have to be scrapped, resulting in serious resource waste and huge economic losses
Laser cladding deposition (LCD), called laser engineering net shaping (LENS) [2], is a laser additive manufacturing process, which is based on the iterative process of coaxial powder delivery melting/rapid solidification layer-by layer deposition [3]
The results showed that the rail cladded by 316 stainless steels did not deform under the cyclic loading applied and would offer a greatly enhanced rolling contact fatigue life

Summary

Introduction

Many defective components, which are mis-machined in the manufacturing process or locally worn in the service process, have to be scrapped, resulting in serious resource waste and huge economic losses. Steel is the most commonly used materials for gears, shafts, railway wheels, and so on in many industrial applications, and the market demand for the repairing of such products is huge. Laser cladding deposition (LCD), called laser engineering net shaping (LENS) [2], is a laser additive manufacturing process, which is based on the iterative process of coaxial powder delivery melting/rapid solidification layer-by layer deposition [3]. Owing to the manufacturing principle and those significant merits, LCD technique is suitable for the repairing of defective components [5]

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