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首页> 外文会议>2002 World Congress on Powder Metallurgy amp; Particulate Materials Pt.8 Jun 16-21, 2002 Orlando, FI >EFFECT OF DENSITY AND MIX FORMULATION ON SINTERED STRENGTH AND DIMENSIONAL STABILITY OF 0.85 Mo LOW ALLOY STEEL POWDERS
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EFFECT OF DENSITY AND MIX FORMULATION ON SINTERED STRENGTH AND DIMENSIONAL STABILITY OF 0.85 Mo LOW ALLOY STEEL POWDERS

机译：密度和混合配方对0.85％Mo低合金钢粉烧结强度和尺寸稳定性的影响

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摘要

The growth of the P/M industry is highly focused on applications requiring high mechanical strength. For these applications, an improved dimensional control of the P/M components is also required in order to reduce or avoid post-sintering trealments and reduce cost. Low alloy steel base powders containing alloying elements such as manganese, molybdenum, nickel or chromium are widely used for such applications. In particular, pre-alloyed Mo steels are very interesting materials for high density applications since molybdenum is an efficient strength enhancer having little detrimental effect on the compressibility. Elemental powders such as graphite, copper and nickel are also usually admixed to increase the hardenability and achieve the targeted sintered properties without sacrificing too much on the compressibility. Of course, the concentration, the type and the nature of these additives also influence the dimensional stability. A study was conducted to evaluate and quantify the effect of elemental additives such as copper, nickel and graphite, and density on the sintered properties of parts made from a water atomized steel powder pre-alloyed with 0.85% Mo. The effect of mix composition and part thickness on the dimensional stability of ring specimens was also evaluated.
机译：P / M行业的增长高度集中在要求高机械强度的应用上。对于这些应用，还需要对P / M组件进行改进的尺寸控制，以减少或避免烧结后排料并降低成本。含有合金元素（例如锰，钼，镍或铬）的低合金钢基粉末被广泛用于此类应用。特别地，预合金钼钢是用于高密度应用的非常令人感兴趣的材料，因为钼是一种有效的强度增强剂，对压缩性几乎没有不利影响。通常还混合元素粉末（例如石墨，铜和镍）以提高淬透性并实现目标烧结性能，而不会牺牲太多可压缩性。当然，这些添加剂的浓度，类型和性质也影响尺寸稳定性。进行了一项研究，以评估和量化元素添加剂（如铜，镍和石墨）的影响以及密度对由0.85％Mo预合金化的水雾化钢粉制成的零件的烧结性能的影响。还评估了零件厚度对环形试样尺寸稳定性的影响。

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