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假若材料从烧结温度能足够快地冷却,则一些粉末冶金材料不需要进行后续热处理就能形成马氏体组织。这些粉末冶金材料叫做“烧结硬化”钢。部分合金化粉Distaloy 4800A和添加铜的Ni-Mo预合金化钢如Ancorsteel○R4600V都可以烧结硬化。一种用Mo作为主要合金化元素的新高压缩性低合金粉Ancorsteel 85 HP,当添加以Cu与石墨时也能烧结硬化。Ancorsteel 85 HP的压缩性比Ni-Mo预合金粉高。研究过冷却速度对Ancorsteel 85 HP+2%Cu+0.9%石墨的显微结构与力学性能的影响。对一系列材料密度评估了拉伸与冲击性能,并且和基于Ancorsteel 4600V的试样做了对比。
If the material cools sufficiently rapidly from the sintering temperature, some powder metallurgy materials can form martensite without subsequent heat treatment. These powder metallurgy materials are called “Sintering” steel. Part of the alloying powder Distaloy 4800A and the addition of copper Ni-Mo pre-alloyed steel such as Ancorsteel ○ R4600V can be hardened. Ancorsteel 85 HP, a new high-compression low-alloyed powder with Mo as the main alloying element, also hardens when added with Cu and graphite. Ancorsteel 85 HP is more compressible than Ni-Mo pre-alloyed powders. The effect of supercooling speed on the microstructure and mechanical properties of Ancorsteel 85 HP + 2% Cu + 0.9% graphite was investigated. Tensile and impact properties were evaluated for a range of material densities and compared to samples based on Ancorsteel 4600V.