研究目的
Investigating the effect of laser hardening performed by multichannel laser on the microstructure, the microhardness distribution, and the abrasive wear resistance of a 30KhGSA structural steel.
研究成果
The optimal condition for the laser hardening of structural 30KhGSA steel is quenching resulting in surface melting to a depth of 0.5 mm. A fine microstructure consisting mainly of untempered martensite forms in the treated area, which ensures a high microhardness (HV0.2 = 6600 MPa) and abrasive wear resistance.
研究不足
The study focuses on the effects of laser hardening on 30KhGSA steel, potentially limiting its applicability to other materials or treatment methods.
1：Experimental Design and Method Selection:
Laser hardening was carried out using the continuous radiation of a multichannel (48-beam) CO2 laser on a TsLT-Yu-5 apparatus under specified conditions.
2：Sample Selection and Data Sources:
30KhGSA steel workpieces were preliminarily oil-quenched from a temperature of 880°C, tempered at 200°C, and air cooled.
3：List of Experimental Equipment and Materials:
Carl Zeiss Axio Vert.AlMAT metallographic microscope, PMT-3 tester, diamond-plated steel spherical tip.
4：Experimental Procedures and Operational Workflow:
Microstructure studies, microhardness measurements, and wear tests were conducted.
5：Data Analysis Methods:
Microhardness distribution and wear characteristics were analyzed.
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