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UD-Ⅱ是一种主要由以MoB与Ni为主原料、在烧结中发生反应而生成的Mo_2NiB_2为代表的复硼化物和Ni构成的反应烧结型金属陶瓷,由于烧结是在无压条件下进行,故其形状的自由度大。 UD-Ⅱ的主要特点是:1.具有优良的高温特性。即使在800℃的高温下其弯曲强度也几乎不下降,仍能保持超过200kgf/MM~2的高水平。而且其硬度随温度上升而下降的比例也较其它材料小,例如在室温下具有大致相同硬度(HV=1000kg/mm~2)的UD-Ⅱ与超硬合金,在500℃下其硬度分别为870.590kg/mm~2,而在800℃下则分别为
UD-II is a reactive sintered cermet mainly composed of complex boride and Ni, typified by Mo2NiB2, which is mainly made of MoB and Ni and reacted during sintering. Since sintering is performed under no pressure, , So the shape of the large degree of freedom. UD-Ⅱ’s main features are: 1. Has excellent high temperature properties. Even at a high temperature of 800 ° C, the flexural strength hardly drops, and a high level exceeding 200 kgf / mm 2 can be maintained. Also, the hardness decreases with increasing temperature. The hardness of UD-II and cemented carbide, which have substantially the same hardness (HV = 1000 kg / mm 2) at room temperature, is 870.590kg / mm ~ 2, while at 800 ℃, respectively