碳化鸨(硬质合金)在密封材料中占有特殊的地位,其原因是这种材料有高的硬度,钢度和耐磨性,因此在重负荷,含 有固体颗粒物质,易结晶的介质中,选用碳化鸨作为摩擦材料尤为适宜。
鸨钻类硬度合金在酸性介质中耐腐蚀性能较差,而“Wc-Ni-Cr”耐腐蚀硬质合金不仅保持了常用硬质合金的优良性能, 而且抗腐蚀能力大大提高,能适合化工生产中作为输送酸,碱介质的机械密封摩擦付材料。
WC(TC)occupies the special position in the sealing material, as it has has high hardness, Steel degree and wearability. So, it is best choice to use the tungsten carbide in heavy load and medium which contain the solid particulate matter and crystallization.
TC-cobalt has bad corrosion resistance in acid medium. But iWc-Ni-Cri has a good performance of the general TC, also its resisting-corrosion make a great improvement. It can used in chemical industry as friction material of mechanical seal which are used intransportation for acid alkali medium.
性能 Performanace | YG6 或 YG8 | WC-Ni-Cr |
密度g/cm3 Density (g/cm3) | > 14.7 | > 14.3 |
硬度(HRA) Hardness (HRA) | > 90 | > 90 |
抗弯强度(Mpa) Bend strength(Mpa) | > 1470 | > 1470 |
热膨胀系数d/°c) o Coefficent of heat expansion (1 /°C ) | 4.5 X ICT | 5 X 10-6 |
弹性模量(Mpa) Elastic modulus(Mpa) 热传导 | 600 | 608 |
系数(Wm/k) Thermal codutivty(Wm/k) | 58.1-87.9 | 58.6-83.7 |