采用行程限制法将1300WB低合金钢粉压制成型并在不同温度下烧结制备了低合金钢,研究了烧结温度对其显微组织、微观形貌、密度、压溃强度和硬度的影响.结果表明:随着烧结温度升高,试样中孔隙的数量减少、尺寸减小,孔隙由连通状变得独立封闭,且孔形状由不规则形向球形转变;较低温度烧结试样的显微组织由珠光体、铁素体和渗碳体组成,随烧结温度升高,珠光体数量增多,试样的显微组织变均匀;试样的密度、压溃强度和硬度均随烧结温度升高而增大.%1300WB low-alloy steel powder was compression formed by a route limitation method and then was sintered to a low-alloy steel at different temperatures.The effects of sintering temperature on the microstructure,micromorphology,density,compressive strength and hardness were studied.The results show that with the increase of sintering temperature,the pore quantity in the sample decreased and the size was reduced;the connected pores became independent;the pore shape changed from irregular to spherical.The microstructure of the low-temperature sintered sample was composed of pearlite,ferrite and cementite.With the increase of sintering temperature,the amount of pearlite increased and the microstructure became uniform.The density,compressive strength and hardness of samples also increased with increasing sintering temperature.
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