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可能有几种方法可使铁基粉末冶金零件达到较高密度。二次压制/二次烧结可使密度大于7.3g/cm3,但受到成本与几何形状条件的限制。对一种新方法进行了评价,用这种方法可一次压制得到高使用性能材料,并将其和其他生产工艺进行了比较。比较是利用Ancorsteel 85HP与Distaloy 4800A基本材料进行的。对各种生坯与烧结件性能进行了评价,其中包括:生坯强度,横向断裂强度,拉伸性能及冲击值。数据清楚地证明,拥有专利的[1]ANCORDENSETM工艺(温压)提供的使用性能可与二次压制/二次烧结制作的相比拟。用一次压制达到了生坯密度值的无孔隙密度极限的98.5%。
There are probably several ways to achieve higher density of iron-based powder metallurgy parts. Secondary compression / secondary sintering allows densities greater than 7.3 g / cm3, subject to cost and geometry constraints. A new method was evaluated in which high performance materials were pressed in one pass and compared to other manufacturing processes. The comparison was made using Ancorsteel 85HP and Distaloy 4800A base material. Various green and sintered parts were evaluated for their properties, including green strength, transverse rupture strength, tensile properties and impact values. The data clearly demonstrate that the patented [1] ANCORDENSETM process (warm pressing) provides performance comparable to that produced by secondary pressing / secondary sintering. One-time compression reached 98.5% of the non-porous density limit of the green density value.