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为了解决钢渗硼时出现富碳过渡层这一问题,本文在分析对比几种渗硼方法的基础上,提出应用硼砂、硅和碳酸钠为渗硼剂,使钢件在渗硼过程中适当脱碳,以控制硼化物层内侧碳元素含量的无毒固体渗硼的方法。文中对渗硼剂的选择,渗硼机理,渗硼组织特征,影响渗硼质量因素等作了初步的探讨。本文通过热力学分析指出,这一渗硼方法是可行的。试验表明,45钢经950℃渗硼后可以获得预期的过渡层组织,过渡层不增碳。这一渗硼方法,由于渗硼剂具有对基体材料脱碳——渗硼的特性,可以控制碳钢硼化物层内侧组织,对高碳钢或某些高合金钢渗硼也能获得梳齿状硼化物层,对提高工业纯铁软磁性元件的表面耐磨性能也取得良好的使用效果,而且成本低,不污染环境,因此,可以预期它对发展渗硼工艺的应用,将会有积极的作用。
In order to solve the problem of carbon-rich transition layer during boronizing steel, based on the analysis and comparison of several boronizing methods, it is proposed that borax, silicon and sodium carbonate should be used as the boronizing agent to make the steel parts proper during the boronizing process Decarburization, in order to control the content of carbon inside the boride layer non-toxic solids boriding method. In this paper, the selection of boronizing agent, boronizing mechanism, the characteristics of boronizing structure, affecting the quality of boronizing and other made the initial discussion. In this paper, thermodynamic analysis indicates that this boronizing method is feasible. Experiments show that 45 steel after boronizing 950 ℃ can get the expected transition layer organization, the transition layer does not increase carbon. This boronization method, because boronizing agent has the property of decarburizing-boronizing the base material, can control the inner side of the carbonized steel boride layer and can also obtain the comb teeth of high carbon steel or some high-alloy steel Boride layer to improve the industrial pure iron soft magnetic component surface wear resistance also achieved good results, and low cost, does not pollute the environment, therefore, it can be expected that its application development of boronizing technology, there will be a positive Role.