中碳调质钢激光热处理耐蚀性研究
Study on Corrosion Resistance of Medium Carbon Steel After Laser Treatment
钟 娜, 王引真, 韩 彬, 王瑞英
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作者单位：中国石油大学(华东) 机电学院, 山东 东营 257061
中文关键字：激光相变硬化； 耐蚀性； 40Cr
英文关键字：laser transformation hardening; corrosion resistance; 40Cr
中文摘要：采用5 kW横流CO2激光器对40Cr钢表面进行大面积的激光相变硬化；用失重法和电化学方法测试材料激光相变硬化后的耐蚀性。结果表明，在搭接率为20%的条件下，调质态的40Cr激光相变硬化后腐蚀电流密度为110.4 μA，耐蚀性较母材提高了30%，而正火态的40Cr激光相变硬化后腐蚀电流密度为293.9 μA，耐蚀性能大幅度下降。
英文摘要：The big area transformation hardening on 40Cr steel surface were carried out with a 5 kW crosscurrent CO2 laser. The corrosion resistance of media carbon steel after phase-transformation hardening was measured by weightless law and electrochemical method. The results show that: under 20% joint rate, the mechanism corrosion resistance of tempered 40Cr steel reinforced by laser transformation hardening increases by 30%, while the mechanism corrosion resistance of 40Cr steel dramatically declines after laser transformation hardening.