Laser surface melting: A suitable technique to repair damaged surfaces made in 14 Ni (200 grade) maraging steel
Laser surface melting: A suitable technique to repair damaged surfaces made in 14 Ni (200 grade) maraging steel
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DOI：
10.1016/j.surfcoat.2012.09.039
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发表时间：
2012-11
影响因子：
5.4
通讯作者：
M. Cabeza;G. Castro;P. Merino;G. Pena;M. Román
中科院分区：
文献类型：
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作者：
M. Cabeza;G. Castro;P. Merino;G. Pena;M. Román
使用以连续模式运行的高功率固体 Nd-YAG 激光器在不同的热处理条件下重熔马氏体时效钢 14 Ni（200 级）的表面。优化了加工参数，将该技术用作受损表面的修复程序，以提高马氏体时效钢制成的工具的使用寿命。在激光加热的材料中可以找到不同的区域。此外，除了在对应于所研究的钢的热处理条件之一的样品热影响区的狭窄层中发现的一些非常小的奥氏体池之外，没有发现奥氏体回复，这与该钢的低镍含量一致。激光表面熔化（LSM）与时效热处理相结合导致硬度（从325到520 HV0.1以上）和表面层的耐磨性显着提高（损失材料的体积从激光表面熔化条件下的钢中的 0.52 mm3 减少到激光表面熔化条件下的钢中的 0.28 mm3，并最终达到峰值时效硬化条件）。
A high power solid Nd-YAG laser, operating in continuous mode, was used to re-melt the surface of a maraging steel, 14 Ni (200 grade), in different heat treatment conditions. Processing parameters were optimized for the employment of this technique as a repairing procedure of damaged surfaces to increase the useful life of tools made in maraging steels. Different zones can be found in laser-heated material. In addition, the absence of austenite reversion, consistent with the low nickel content of this steel, was found with the exception of a few very small pools of austenite found in a narrow layer in the heat-affected zone of samples corresponding to one of the studied heat treatment conditions of steel.Laser surface melting (LSM) combined with aging heat treatment causes a significant rise in the hardness (from 325 to more than 520 HV0.1) and in the wear resistance of the surface layer (with a decrease in the volume of lost material from 0.52 mm3in the steel in the laser surface melted condition to 0.28 mm3in the steel in laser surface melted and finally peak age hardening condition).