Preparing method for improving Mo alloy performance by adding Ti

Abstract

The invention provides a preparing method for improving the Mo alloy performance by adding Ti. According to the preparing method, the granularity of adopted Mo powder is smaller than 2.9 micrometers, the oxygen content is 0.13%, the granularity of high-purity TiH2 powder is smaller than 50 micrometers, the TiH2 powder is added into the Mo powder, and Mo-Ti mixed powder with the mass fraction of Ti being 0.8% is prepared through mechanical milling; an alloy is prepared through high-pressure mould pressing, presintering and high-temperature sintering; a small number of the Ti element is added into molybdenum so that the tensile strength of the alloy can be effectively improved; and in addition, when the sintering temperature is 1920 DEG C and the adding amount of the Ti is 0.8%, the tensile strength of the alloy is maximum, and particle textures can be further refined.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a preparation method for improving the performance of Mo alloy by adding Ti. Background technique [0002] Metal molybdenum has the characteristics of low thermal expansion coefficient and low vapor pressure, high melting point, wear resistance, thermal conductivity and high temperature strength, and excellent miscibility with various metals, so it is widely used in iron and steel industry, electronics industry, aviation and nuclear energy technology , Metal pressure processing and other fields. At present, the main methods of preparing molybdenum products are smelting method and powder metallurgy method. However, with the continuous complexity of the shape of modern products, molybdenum ingots are prepared by smelting, and the subsequent processing is a great waste of materials. The powder metallurgy method can not only prepare parts with complex shapes, but also has less sub...

AI Technical Summary

Problems solved by technology

However, with the continuous complexity of the shape of modern products, molybdenum ingots are prepared by smelting, and the subsequent processing is a great waste of materials. The powder metallurgy method can not only prepare parts with complex shapes, but also has less subsequent processing and higher material utilization. high

However, if pure molybdenum metal is sintered without subsequent treatment (such as deformation strengthening and annealing treatment), the brittleness of the material is very obvious and the strength is not high

However, the products prepared by powder metallurgy are generally close to the final shape, and it is difficult for these products to be strengthened by extrusion, forging, hot rolling, etc. to improve plasticity. Therefore, the products are brittle and their applications are greatly limited.

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