Abstract

The results of experimental studies of the surface roughness and the microstructure of high-speed steel R6M5 after gas-laser cutting are presented. It is shown that the parameters the surface roughness obtained in the case of the studied samples correspond to typical values of the surface-roughness parameters after such types of machining as turning or grinding operations. In the course of gas-laser cutting, a quenching zone up to 110 μm in depth with an increased microhardness amounting to 10 600 ± 160 MPa is formed in the surface layer. Short-term tempering in the temperature range of A_c1–620°С does not lead to decomposition of the martensite; neither a transition zone nor tempering zone are revealed.

中文翻译：

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气体激光切割后高速钢表面的显微图像和显微组织

摘要

介绍了高速钢 R6M5 气体激光切割后表面粗糙度和显微组织的实验研究结果。结果表明，在研究样品的情况下获得的表面粗糙度参数对应于车削或磨削等加工类型后表面粗糙度参数的典型值。在气体激光切割过程中，表层形成深度达 110 μm、显微硬度增加达 10 600 ± 160 MPa 的淬火区。A _c1 –620°С温度范围内的短期回火不会导致马氏体分解；没有显示过渡区和回火区。