High specific gravity tungsten alloy material and preparation method thereof

Abstract

The invention relates to a high specific weight tungsten alloy material and a preparation method thereof, and relates to a tungsten alloy material and a preparation method thereof. The invention solves the problems of poor plasticity, low strength, small deflection, large residual force of the prior high specific weight tungsten alloy product, and large equipment tonnage required, long demoulding time, tightly hermetical die and high cost in the method. The high specific weight tungsten alloy material is prepared by tungsten powder, nickel powder, iron powder and cobalt powder. The preparation method comprises the following steps: firstly, preparation of mixed powder A; secondly, preparation of a blank; thirdly, sintering of the blank; fourthly, preparation of mixed powder B; fifthly, preparation of a lubricating medium; and sixthly, acquisition of the high specific weight tungsten alloy material by placing the blank and the lubricating medium into the die for extrusion forming. The high specific weight tungsten alloy material has good plasticity, large strength, large deflection and small residual force. The preparation method is simple, has small equipment tonnage required, short demoulding time and low cost, and has no strict requirement on the die.

Description

technical field [0001] The invention relates to a tungsten alloy material and a preparation method thereof. Background technique [0002] my country is a country rich in tungsten resources, and tungsten alloys are widely used in cutting-edge scientific fields, military industry and civilian industry because of their high density and a series of excellent performance characteristics. High specific gravity tungsten alloys are mainly composed of nickel, iron, cobalt, copper, chromium and other elements, and are often prepared by hot isostatic pressing and radiation heating sintering methods. [0003] At present, the methods to improve the performance of tungsten alloy mainly include adding trace elements, improving the distribution ratio of ingredients, refining the size of tungsten particles, optimizing the sintering process, heat treatment and deformation strengthening. Deformation can achieve the purpose of significantly improving the strength, but the plasticity will decre...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor plasticity, low strength, small deformation and large residual force of existing high specific gravity tungsten alloy products, the method requires large tonnage of equipment, long demoulding time, strict sealing of molds and high cost. A kind of high specific gravity tungsten alloy material and preparation method thereof