摘要
本文首次开展了微束等离子弧的表面改性研究．采用２Ａ、３Ａ和４Ａ微束等离子弧，对Ｆｅ－Ｃｒ－Ｃ－Ｓｉ－Ｂ自熔合金喷焊层进行了表面扫描重熔，观察、分析了试样显微组织和成分分布，测定了扫描前后试样在１ＮＨ２ＳＯ４溶液中的极化曲线．由于试样的自淬火作用，微束等离子弧扫描细化了组织，减小了显微偏析。
Surface modification using micro-beam plasma-arc was conducted for the first time in the study. With 2A,3A and 4A plasma-arc,the Fe Cr C Si B overlay was scanned by the multi-pass method. The microstructure was observed using SEM, and the distribution of alloy elements was analysed using EDAX.The polarization curves both with and without scanning were in 1N H 2SO 4 solution.It was found that after micro-beam plasma-arc scanning, the microstructure was refined and microsegregation was eliminated. As a result, the corrosion resistance was significantly improved.
基金
国家自然科学基金
浙江大学曹光彪高科技发展基金
