Q235钢双层辉光离子表面冶金超高铬高碳合金层的研究

利用双层辉光离子渗铬和渗碳技术,在Q235钢表面形成超高铬高碳合金层,随后进行了淬火、回火及耐磨性的对比试验,对其合金层的形态、组织、成分及发生的相变、碳化物类型进行了研究.结果表明,在本试验条件下,渗铬层深可达数百微米以上,采用双层辉光离子渗碳新工艺,渗入速度比一般离子渗碳快约10%,碳化物细小、弥散、均匀.用体视金相法估计,碳化物总百分比约占40%以上,耐磨性明显高于GCr15钢的淬火件.

Extra High Cr-C Alloyed Layer on Q235 Steel with Double Glow Plasma Surface Alloying

Alloyed layer with extra high chrome-carbon content was prepared on the surface of Q235 steel samples through double glow ion-chromizing and carburizing. The prepared samples were quenched, tempered and then tested with wear resistance machine. Microstructure, composition and phase transformation in the alloyed layer were analyzed. The resuits show that the depth of alloyed layer is up to several hundreds micron, the carburizing speed of double glow is 10% faster than that of the conventional ion-carburizing, the carbides in the alloyed layer are fine and even and their percentage is about 40%. The wear resistance of Cr-C alloyed layer on Q235 steel is obviously superior to GCrl5 steel.