Q235钢单辉等离子表面渗Mo工艺的研究

Study on Process of Single Plasma Surface Molybdenum on Q235 Steel

利用辉光等离子渗金属技术在Q235钢表面分别进行在直流单辉电源、脉冲单辉电源两种情况下的不同工艺参数的渗Mo研究。着重研究保温时间、桶形辅助阴极等对渗Mo层合金元素含量和渗层厚度的影响,确定较合理的渗Mo工艺参数,并对渗Mo试样进行金相组织、渗层组织组成和相组成、渗层成分分布、晶体结构等检测。结果表明:在工艺相同的情况下,采用脉冲电源所得到的渗层较厚,较直流增加11.8%,渗层表面含Mo量也较高,约增加10.2%。

Q235 steel was subjected to single glow plasma surface molybdenizing technique with DC power supply and pulse power supply, respectively. And the different parameters of two molybdenizing processes were studied. The rational paramters for molybdenizing process were fixed based on the effects of holding time and bucket auxiliary cathode on alloying content and thickness of the alloying layer. Then the metallurgical structure, microstructure, phase composition, composition distribution and crystal structure of the alloying layers were analysed. The results show that, under the same conditions, the alloying layer of pulse power supply increases by 11.8% in thickness and 10.2% in molybdenum content compared with DC power supply.