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Development of Properties of P/M Austenitic Stainless Steels by Nitrogen Infusion

机译:充氮对P / M奥氏体不锈钢性能的影响

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摘要

Properties of nitrogen alloyed P/M austenitic stainless steels manufactured by Hot Isostatic Pressing (HIP) of gas atomized powders were studied. Nitrogen contents beyond the solubility limit of nitrogen in the melt were obtained by solid state nitriding in a fluidized bed furnace. As a disadvantage of the fluidized bed nitriding, the oxygen contents in the powder and the final product increased. Nitrogen alloying increases the strength level, as well as the corrosion and wear resistance of P/M austenitic stainless steels. Nitride precipitation is detrimental to corrosion resistance and ductility, but beneficial to yield strength and wear resistance.
机译:研究了气体雾化粉末的热等静压(HIP)制造的氮合金化P / M奥氏体不锈钢的性能。通过在流化床炉中进行固态氮化来获得超过氮在熔体中的溶解度极限的氮含量。作为流化床渗氮的缺点,粉末和最终产物中的氧含量增加。氮合金化可提高强度水平,以及P / M奥氏体不锈钢的耐蚀性和耐磨性。氮化物沉淀不利于耐腐蚀性和延展性,但有益于屈服强度和耐磨性。

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