摘要:
通常采用水雾化工艺制取铁粉和低合金钢粉,其主要优点是经济成本低,所制粉末呈不规则形状,因而具有较高的压坯强度。这种工艺现也越来越多地用于制取不锈钢粉。由于不锈钢中含有诸如Cr、Mn、Si等强氧化物形成元素,因此水雾化不锈钢粉的氧化问题十分严重,对其烧结过程和材料的力学性能有很大影响。为了达到既降低烧结不锈钢的成本,又不损害其力学性能的目的,因此,如何有效地减少烧结不锈钢中的氧含量就具有十分重要的意义。本文着重探讨了以碳做还原剂对水雾化奥氏体不锈钢粉真空烧结过程及其力学性能的影响。
Abstract:
Water atomizing technology is usually adopted for manufacturing iron and low alloyed steel powder,the main reason of which consists in low productive cost and powder having irregular shape, resulting in relatively high strength of green compacts. Such technology is being more and more used for the preparation of stainless steel powder. The elements such as Cr, Mn, Si, etc in stainless steel are liable to form oxides. Therefor, there is a very serious problem of oxidation of water-atomized stainless steel powder which greatly influences the sintering process and mechanical properties of materials, with the purposes of decreasing the productive costs of sintered stainless steel and no damaging its mechanical properties,it is of very importance to effectively reduce oxygen contents in sintered stainless steel. The present paper has discussed emphatically the influences of using carbon as reducing agent on the vacuum sintering process of water-atomized austenite stainless steel powder and on its mechanical properties.
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