邱星武.45 钢表面激光相变硬化改性组织及耐蚀性能[J].精密成形工程,2015,7(4):80-83.
QIU Xing-wu.Microstructure and Corrosion Resistance of Laser Transformation Hardening Modified on 45 Steel Surface[J].Journal of Netshape Forming Engineering,2015,7(4):80-83. |
| 45 钢表面激光相变硬化改性组织及耐蚀性能 |
| Microstructure and Corrosion Resistance of Laser Transformation Hardening Modified on 45 Steel Surface |
| 投稿时间：2015-05-28 修订日期：2015-07-10 |
| DOI：10.3969/j.issn.1674-6457.2015.04.017 |
| 中文关键词: 激光相变硬化 显微组织 耐蚀性能 |
| 英文关键词: laser transformation hardening microstructure corrosion resistance |
| 基金项目:四川省德阳市重点科学技术研究项目(2013ZZ074-11) |
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| 中文摘要: |
| 目的 为了改善 45 钢表面状态,提高其表面性能,采用 CO2 激光器对其表面进行激光相变硬化处理。 方法 利用带有能谱的扫描电子显微镜(SEM/ EDS)、盐雾试验机等,对激光相变硬化层组织及耐蚀性能进行了观察和分析。 结果 激光相变硬化层由熔化区、相变硬化区和热影响区三部分组成,其组织依次为:混合马氏体+未溶碳化物、针状马氏体、残余奥氏体。 随扫描速度增加,耐蚀性先变好而后变差。 结论 激光相变硬化处理可改善 45 钢的表面性能,显著提高其耐蚀性能。 |
| 英文摘要: |
| In order to improve the surface properties of 45 steel, the laser transformation hardening treatment was carried out by CO2 laser on its surface. The microstructure and properties of alloying layer were analyzed by scanning electron microscope with energy spectrum (SEM/ EDS), salt spray tester, etc. The laser transformation hardening layer was constituted by melting zone, transformation hardened zone and heat affected zone. The microstructure included the mixed martensite plus undissolved carbides, acicular martensite, and retained austenite. With the increase of the scanning speed, the corrosion resistance increased first and then decreased. After laser transformation hardening treatment, the surface properties of 45 steel were improved, which significantly increased the corrosion resistance. |
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