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首页> 外文会议>Association for Iron amp; Steel Technology(AIST) Process Metallurgy, Product Quality and Applications Proceedings; 20040926-29; New Orleans,LA(US) >Comparison of Three Ni-Hard I Alloys
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Comparison of Three Ni-Hard I Alloys

机译：三种Ni-Hard I合金的比较

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摘要

This report documents the results of an investigation which was undertaken to reveal the similarities and differences in the mechanical properties and microstructural characteristics of three Ni-Hard I alloys. One alloy (B1) is ASTM A532 class IA Ni-Hard containing 4.2 wt. pct. Ni. The second alloy (B2) is similar to B1 but higher in Cr, Si, and Mo. The third alloy (T1) also falls in the same ASTM specification, but it contains 3.3 wt. pct. Ni. The alloys were evaluated in both as-cast and stress-relieved conditions except for B2, which was evaluated in the stress-relieved condition only. While the matrix of the high Ni alloys is composed of austenite and martensite in both conditions, the matrix of the low Ni alloy consists of a considerable amount of bainite, in addition to the martensite and the retained austenite in as cast condition, and primarily bainite, with some retained austenite, in the stress relieved condition. It was found that the stress relieving treatment does not change the tensile strength of the high Ni alloy. Both the as cast and stress relieved high Ni alloys had a tensile strength of about 350 MPa. On the other hand, the tensile strength of the low Ni alloy increased from 340 MPa to 452 MPa with the stress relieving treatment. There was no significant difference in the wear resistance of these alloys in both as-cast and stress-relieved conditions.
机译：该报告记录了调查的结果，该调查旨在揭示三种Ni-Hard I合金的机械性能和微观结构特征的异同。一种合金（B1）是ASTM A532 IA级Ni-Hard合金，含4.2 wt。 pct。你。第二种合金（B2）与B1相似，但Cr，Si和Mo含量较高。第三种合金（T1）也符合相同的ASTM规格，但含量为3.3 wt％。 pct。你。除了铸态B2和仅在应力消除条件下评估的B2以外，均在铸态和应力消除条件下对合金进行了评估。高镍合金的基体在两种情况下均由奥氏体和马氏体组成，而低镍合金的基体除铸态的马氏体和残余奥氏体外还包括大量贝氏体，主要是贝氏体。 ，残余奥氏体，处于应力释放状态。发现应力消除处理不会改变高Ni合金的拉伸强度。铸态和消除应力的高Ni合金的抗拉强度均为约350 MPa。另一方面，通过应力消除处理，低Ni合金的抗拉强度从340MPa增加到452MPa。在铸态和消除应力的条件下，这些合金的耐磨性没有显着差异。

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