Quick Search:       Advanced Search
柳建,朱胜,蔡志海,张平.振动对FV520B不锈钢MAG堆焊再制造成形组织结构的影响[J].稀有金属材料与工程(英文),2019,48(3):728~738.[liu jian,zhu sheng,cai zhihai and zhang ping.Effect of Vibration on Remanufacturing Microstructure of FV520B Stainless Steel by MAG Surfacing Deposition Technology[J].Rare Metal Materials and Engineering,2019,48(3):728~738.]
Effect of Vibration on Remanufacturing Microstructure of FV520B Stainless Steel by MAG Surfacing Deposition Technology
Download Pdf  View/Add Comment  Download reader
Received:September 09, 2017  Revised:November 08, 2017
DOI:
Key words: FV520B precipitation hardening stainless steel  Remanufacturing  MAG surfacing  Vibration  Microstructure
Foundation item:国家自然科学基金青年基金项目,面上项目
Author NameAffiliation
liu jian,zhu sheng,cai zhihai and zhang ping  
Hits: 55
Download times: 74
Abstract:
      The remanufacturing experiment of FV520B precipitation hardening stainless steel was carried out by using surfacing deposition technology. On this basis, the remanufacturing microstructure characteristics were analyzed and the effect of mechanical vibration on remanufacturing microstructure was studied. The results showed the following: Firstly, the remanufacturing microstructure of FV520B stainless steel by MAG surfacing deposition technology was comprised of martensite plus a carbide precipitation-hardening phase. It performed a characteristic periodical variation along the direction of forming height, which was described by certain self-similar fractal characteristics. The vibration would increase the probability of twin formation to some extent. There was also the broken effect on martensite lath that had to be taken into account. It should be noted that the width of the martensite lath decreased first and then increased with the continuous increase of the vibration rotation rate. Affected by the vibration, the lattice distortion and the preferred orientation of each crystal plane would both be changed. However, the change rule of different crystal planes was different. The Bragg diffraction peak positions of planes (110) and (211) shifted towards the direction of lower diffraction angle due to the addition of vibration. Furthermore, the offset increased first and then decreased with the continuous increase of the vibration speed. Meanwhile, the FWHM of diffraction peak (110) decreased first and then increased and the preferred orientation of this crystal plane increased first and then decreased. Within the range between 0 and the resonance speed, the FWHM of diffraction peak (211) decreased first and then increased with the continuous increase of the vibration speed and decreased again when the vibration speed was higher than the resonance speed. However, its preferred orientation continued to increase with the increase of the vibration rotation rate. In general, the sub-resonance frequency (The vibration rotational speed f=3000 r/min) had the most significant effect on the remanufacturing microstructure of FV520Bstainless steel by MAG surfacing deposition technology.