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| The effects of W particle size on the structure and mechanical properties of tungsten-copper alloy strips prepared by warm powder rolling |
| CUI Li-qun1，HAN Sheng-li1，LI Da-ren2，HU Ke1 |
| Gu1 angdong Institute of Materials and Processing, National Engineering Research Center of Powder Metallurgy of Titanium & Rare metals, Guangzhou 510650, China，2 Guangdong Polytechnic Institute, Guangzhou 510091, China |
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Abstract Tungsten powder of different particle size thoroughly mixed with copper powder respectively, then the mixtures warm rolled into green strips at 100 °C .The green strips were sintered at 1350 °C to prepare tungsten-copper alloy strips. The effects of W particle size on the density and thickness of green strips were discussed. The structure and mechanical properties of the sintered alloy strips were investigated. The results show that the relative density of green strips increases and the thickness decreases with the increasing of W particle size. The larger the particle size of W powder, the smaller the relative density and the smaller the volume shrinkage of the raw slab after liquid phase sintering.But the larger W particle size, the more difficult W particle form sintering neck during liquid phase sintering, that is not conducive to generate W-skeleton and reduce the mechanical properties of tungsten-copper alloy strips.
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Received: 10 May 2018
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| injection molding; viscosity body; sintering; crack; MIM |
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2019, Vol. 29 
