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Near Full Density Nano Iron-based Materials by Pulse Current Sintering

机译：脉冲电流烧结近全密度纳米铁基材料

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摘要

Constant current plus pulse current electrical sintering was introduced into the sintering of a ball-milled nanocrystalline Fe-2Cu-2Ni-1Mo-0.8C mixed powder. Effect of pulse current charging time on the properties of sintered products was studied. Constant electric current sintering was also used for comparison. A nanostructured iron-based material was obtained within 4 minutes of sintering. It has a density of 7.7 g/cm~3 (relative density of 98.7 %) with an average grain size (iron-matrix) of 58 nm and carbide particle size of less than 100 nm, a hardness of HRC 64 and transverse rupture strength of 2004 MPa. When only pulsed electric current sintering was used with a sintering time of 5 min, a fine grained iron-base material with density of 7.74 g/cm~3 (relative density of 99.2%), a hardness of HRC 65 and transverse rupture strength of 2045 MPa was obtained.
机译：将恒流加脉冲电流电烧结引入到球磨纳米晶Fe-2Cu-2Ni-1Mo-0.8C混合粉末的烧结中。研究了脉冲电流充电时间对烧结产品性能的影响。恒流烧结也用于比较。在烧结的4分钟内获得纳米结构的铁基材料。它的密度为7.7 g / cm〜3（相对密度为98.7％），平均粒径（铁基体）为58 nm，碳化物粒径小于100 nm，HRC 64的硬度和横向断裂强度2004 MPa。当仅使用脉冲电流烧结且烧结时间为5分钟时，密度为7.74 g / cm〜3（相对密度为99.2％），HRC 65硬度和横向断裂强度分别为的细晶粒铁基材料。获得2045MPa。

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