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(1)目前各种方案的碳氮硼三元共渗,含硼均微,微量硼起何作用,这是一个争议问题。本文通过工艺试验、机械性能试验、耐磨试验、电子扫描金相分析,表明微量硼起的作用有限,并对几种论点进行了讨论。尽管现行工艺的三元共渗,实质上是二元共渗,但设备简单,原料易得,工艺稳定,质量有保证,在生产实践中确能提高产品寿命,仍是一种值得重视和推广的新工艺。(2)试验了多种材料的适应性,Cr_(12)Mo 经共渗后,出现了独特的组织,耐磨性远远超过常规处理的 Cr_(12)Mo 及高速钢,大可在模具上推广使用。高速钢经共渗后,硬度、耐磨性亦有提高。航空用渗碳钢12Cr_2Ni_4A、18Cr_2Ni_4WA 由渗碳改为共渗前景也是乐观的。(3)两段法大大改善碳化物的形状和分布,对于要求高度耐磨的零件,可通过这种方法,在表层造成均匀、颗粒状的碳化物。
(1) At present, various programs of carbonitriding boron ternary permeation, boron are micro, boron what role since this is a controversial issue. In this paper, through the process test, mechanical property test, wear test, electronic scanning metallographic analysis shows that the role of trace boron plays a limited role, and discussed several arguments. Although the ternary permeation of the current process is essentially binary co-permeation, the equipment is simple, the raw materials are easily obtained, the process is stable, the quality is guaranteed, and the life of the product can indeed be prolonged in production practice, which is still worthy of attention and promotion New craft (2) The adaptability of many kinds of materials was tested. Cr (12) Mo was co-permeated and appeared unique structure. The wear resistance of Cr12 Mo was much higher than that of Cr 12 Mo and HSS. On the promotion of use. After high-speed steel co-permeation, hardness, wear resistance also increased. Aerospace carburizing 12Cr_2Ni_4A, 18Cr_2Ni_4WA from carburizing to permeation prospect is also optimistic. (3) The two-stage method greatly improves the shape and distribution of carbides. For such parts that require a high degree of wear resistance, uniform and granular carbides can be formed on the surface by this method.