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钨及碳化钨晶内的形貌和粒度,对硬质合金的强度和韧性有很大影响。弄清它们之间的关系,对提高合金性能将是有益的。因此钨及碳化钨晶内亚结构的观察方法是一个重要环节。经试验,用金相显微镜观察钨及碳化钨晶内亚结构既简便,效果也好。一试样制备 1 铜镶样称取一定重量的不同粉末,用汽油石腊溶液均匀掺和,用80纲目铜筛网过筛,再用手压机压制成8×9mm圆柱体,置于80℃左右的电烘箱内烘干,保温3小时,将残余汽油挥发后,再置于铜片上装入88mm瓷舟皿内,轻推入通氢气的管状炉中。试样在中温带
Tungsten and tungsten carbide morphology and grain size, the strength and toughness of cemented carbide have a great impact. To understand the relationship between them, to improve the performance of the alloy will be beneficial. Therefore, tungsten and tungsten carbide crystal sub-structure of the observation method is an important part. After the test, using a metallurgical microscope to observe the tungsten and tungsten carbide intracrystalline substructure is both simple and effective. A sample preparation 1 copper inlay Weigh a certain weight of different powders, uniformly mixed with petrol paraffin solution, sieved with 80 mesh copper screen, and then pressed into a hand press 8 × 9mm cylinder placed in 80 ℃ electric oven drying, heat 3 hours, the residual volatile oil, and then placed on the copper sheet into the 88mm boat boat, gently pushed into the tube through the hydrogen furnace. The sample is in temperate zone