Microstructure and corrosion resistance property of laser transformation hardening pre-hardened AISI P20 plastic die steel
Microstructure and corrosion resistance property of laser transformation hardening pre-hardened AISI P20 plastic die steel
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激光相变硬化预硬AISI P20塑料模具钢的显微组织及耐蚀性能
DOI：
10.1016/j.optlastec.2019.105852
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发表时间：
2020-02
影响因子：
5
通讯作者：
Yang Liu
中科院分区：
文献类型：
--
作者：
Zhuoyuan Li;Jian Zhang;Boqi Dai;Yang Liu
预硬化AISI P20塑料模具钢目前的表面性能阻碍了塑料模具使用寿命的进一步延长。采用激光相变硬化工艺对预硬化态AISI P20钢进行了不同工艺参数下的表面改性试验。系统地讨论和分析了其组织演变、力学性能、耐腐蚀性能和腐蚀机理。结果表明，表面粗糙度降低，对原材料的损伤较小。通过对显微组织和动电位阳极极化曲线的综合分析，发现高碳马氏体含量多、碳化物颗粒少是该表面改性工艺的有利因素。所有激光相变硬化试样的腐蚀电位都发生了正移，其硬度从表面到基体呈逐渐降低的分布，在激光相变硬化层表面处硬度最高。其中，1.8kW3mm/s工艺参数的试样显微硬度最高，耐腐蚀性能最好（在3.5wt%NaCl溶液中）。
The current surface properties of the pre-hardened AISI P20 plastic die steel prevent from further increasing the service lifetime of plastic molds. Surface modification experiments under different parameters were carried out on the pre-hardened AISI P20 steel through the laser transformation hardening process. The microstructure evolution, mechanical properties, corrosion resistance properties and the corrosion mechanism were discussed and analyzed systematically. The results indicated that the surface roughness was reduced and there existed insignificant damage to the raw materials. Based on a comprehensive analysis of the microstructure and potentiodynamic anodic polarization curves, more high-carbon martensite and less carbide particles were the positive factors for this surface modification process. The corrosion potential of all the laser transformation hardened samples shifted positively and their hardness exhibited a gradually decreasing distribution from the top surface to substrate with a highest value at the surface of the laser transformation hardened layer. Especially, the sample with parameters of 1.8 kW 3 mm/s had the highest microhardness and the best corrosion resistance property (in 3.5 wt% NaCl solution).
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DOI：
10.1007/s12613-016-1324-y
发表时间：
2016-09
期刊：
International Journal of Minerals, Metallurgy, and Materials
影响因子：
--
作者：
N. Nayebpashaee;H. Vafaeenezhad;S. Kheirandish;M. Soltanieh
通讯作者：
N. Nayebpashaee;H. Vafaeenezhad;S. Kheirandish;M. Soltanieh
影响因子：
3.9
作者：
Bai, Yuchao;Yang, Yongqiang;Wang, Di
通讯作者：
Wang, Di
影响因子：
8.3
作者：
Bonagani, Sunil Kumar;Bathula, Vishwanadh;Kain, Vivekanand
通讯作者：
Kain, Vivekanand
影响因子：
5
作者：
Chen, Zhikai;Zhu, Qinghai;Luo, Jingshuai
通讯作者：
Luo, Jingshuai
影响因子：
8.4
作者：
Meng, Chao;Zhou, Hong;Ren, Luquan
通讯作者：
Ren, Luquan