Prealloyed carcass powder

Abstract

The invention relates to pre-alloyed tire body powder and belongs to the technical field of powdery metallurgical material. The pre-alloyed tire body powder is used for solving the problem that the prior metal or pre-alloyed tire body powder has relatively low mechanical performance or overhigh sintering temperature. The powder consists of the following raw materials by weight percentage: 50 to 70 percent of Fe, 10 to 20 percent of Co, 10 to 20 percent of Cu, 1 to 5 percent of Ni, 1 to 5 percent of Sn, 1 to 3 percent of P and 5 to 10 percent of WC. Through repeated testing, proper mixing compositions are obtained; Fe, Co and Cu are adopted as basic compositions and are added with Ni, Sn, P, WC and other elements according to the mixture ratio to prepare the pre-alloyed tire body powder through the prior powder preparation technology. With the proper content and synergistic action of each added element, the pre-alloyed tire body powder has excellent composition evenness and enough activity of sintering reaction, simultaneously improves the performance of a sinter cake and particularly has remarkable improvement on rigidity, bending strength, wearing resistance, holding force to diamond and other aspects.

Description

technical field [0001] The invention relates to a metallurgical powder, in particular to a pre-alloyed matrix powder used for manufacturing diamond tools, and belongs to the technical field of powder metallurgy materials. Background technique [0002] With the intensification of competition in the industry, the demand for cost reduction and efficiency improvement in the stone and engineering construction industries has become increasingly strong, and the demand for high-performance diamond tools in domestic and foreign markets has risen rapidly. The method of manufacturing diamond tools is to mix diamond and metal powder first, then cold press the mixture, and then sinter it into a compact compact with or without pressure. Among them, the metal powder is used as the tool matrix binder to hold the diamond, and its raw material composition and particle size will have an important impact on the performance of the diamond tool. [0003] It is usually required that the metal pow...

AI Technical Summary

Problems solved by technology

High sintering temperatures lead to the following main disadvantages: reduced sintering die life, diamond degradation and high energy consumption

During the use of diamond saw blades, it is inevitable that the local temperature will be too high. From a technical point of view, the cobalt-based matrix has the advantage of good red hardness. The use of fine cobalt powder has brought good results to diamond tools. But its disadvantage is the high price of cobalt powder and strong price fluctuations. At the same time, cobalt is also suspected of causing harm to the environment.

When using the mixed powder of fine metal powder as the binder powder, because the uniformity of the mixed powder has a substantial influence on the mechanical properties of the final tool, the hardness, strength and wear resistance of the obtained sintered block are relatively low. lower