A new generation of non-uniform cemented carbide for mining-1

       

This article systematically researched the microstructure of the production process of phenanthrene homogeneous hard alloy for mining. Experiments show that two alloy mixtures A (WC-1%T aC-15%C o) and B (WC-1%T a C-5. 0goC o) are used to separate wet milling into granules. The alloys mixed with each other and vacuum sintered have high-cobalt and low-cobalt areas locally, coarse tungsten carbide crystals, and the overall unevenness of the bonding phase distribution, resulting in a uniform microstructure. Rock drilling practice has proved that the new generation of heterogeneous cemented carbide has the high toughness of high-cobalt alloys and the high wear resistance of low-cobalt alloys. The medium-89X type drill and slab-hard rock tunneling machine pick bits made with it, drilled medium-grained granite in open-pit mines, and cut i12-14 new quartz sandstone (60~70% quartz) in coal mines. Satisfactory results.

According to the test result of the instrument, no matter what kind of cobalt content of tungsten-cobalt alloy, ~llM s value is lower than 135, there will be phase in the alloy; if the g tM s value is close to 160, there will be non-chemical in the alloy.
Taiwan carbon phase. When using this instrument to test, it is related to the weight of the tested platform and the content of cobalt. The calculation formula is: M s = reading × 1.07 (coefficient) / percentage content of the drill (2) after carbon calibration This kind of performance is compared with normal Taiwan gold performance. The different cobalt content and different carbon content that produce the correction effect are the physical and mechanical properties of metal and the vacuum sintering of normal carbon content. After carbon correction and sintering, the performance of the alloy is basically the same as that of the alloy after vacuum sintering with normal carbon content, which has no adverse effects on its physical and mechanical properties.