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A kind of preparation method of large size high performance tungsten alloy product

A tungsten alloy and large-size technology, which is applied in the field of product manufacturing, can solve the problems of increased manufacturing process difficulty, large performance differences, and low material utilization, so as to reduce the overall process difficulty, reduce equipment requirements, and improve material utilization. Effect

Active Publication Date: 2020-03-24
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, due to the large size of the product, the difficulty of the manufacturing process has increased geometrically, especially when higher mechanical properties and larger sizes are required at the same time, it is difficult to control the parameters of the sintering process, and the performance of different parts of the sintered product Huge differences often lead to inconsistent charging density, large differences in green compact strength, and large fluctuations in sintered density, resulting in large differences in the final performance of each product, poor consistency of the core and edge of a single product, resulting in high product scrap rate and material utilization. The rate is low, resulting in high product manufacturing costs, which cannot meet the needs of use
[0003] After investigation, there are only patent documents on the preparation method of large-scale tungsten rods, and there is no report on the preparation method of large-scale tungsten alloy powder metallurgy parts with a single weight exceeding 500 kg.

Method used

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  • A kind of preparation method of large size high performance tungsten alloy product
  • A kind of preparation method of large size high performance tungsten alloy product
  • A kind of preparation method of large size high performance tungsten alloy product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing a large-size high-performance tungsten alloy product, the preparation method is:

[0034] a. The mass percentage of each component of the tungsten alloy product is: W: 94.95%; Ni: 3.15%; Fe: 1.5%, Co: 0.35%, Mn; 0.05% (additionally). Among them, the particle size of tungsten powder is 3-5um.

[0035] b. Put the weighed powder into the double cone mixer, and weigh the mixing ball according to the total weight of the powder. WC balls, ball to material weight ratio 0.45. Mixing time 10h. The mixed powder passes through a 30-mesh sieve, removes the mixing ball, and then passes through a 100-mesh sieve.

[0036] c. Put the mixed alloy powder into the custom-made rubber sleeve. The rubber sleeve is made of black oil-resistant rubber. The size of the rubber sleeve can be designed according to the product situation. The powder loading process should be even. Inhomogeneity causes size irregularity of the blank after pressing.

[0037] d. Put the powd...

Embodiment 2

[0046] a. The mass percentages of the components of tungsten alloy products are: W: 92.95%; Ni: 5.2%; Fe: 1.4%, Co: 0.4%, Mn; 0.05% (additionally). Among them, the particle size of tungsten powder is 3-5um.

[0047] b. Put the weighed powder into the double cone mixer, and weigh the mixing ball according to the total weight of the powder. WC balls, ball to material weight ratio 0.45. Mixing time 10h. The mixed powder passes through a 30-mesh sieve, removes the mixing ball, and then passes through a 100-mesh sieve.

[0048] c. Put the mixed alloy powder into the custom-made rubber sleeve. The rubber sleeve is made of black oil-resistant rubber. The size of the rubber sleeve can be designed according to the product situation. The powder loading process should be even. Inhomogeneity causes size irregularity of the blank after pressing.

[0049] d. Put the powdered rubber suit into a cold isostatic press, press at a pressure of 180-220Mpa, keep the pressure for 3-5min, releas...

Embodiment 3

[0058] A method for preparing a large-size high-performance tungsten alloy product, the preparation method is:

[0059] a. The mass percentage of each component of the tungsten alloy product is: W: 94.95%; Ni: 3.15%; Fe: 1.5%, Co: 0.35%, Mn; 0.05% (additionally). Among them, the particle size of tungsten powder is 3-5um.

[0060] b. Put the weighed powder into the double cone mixer, and weigh the mixing ball according to the total weight of the powder. WC balls, ball to material weight ratio 0.45. Mixing time 10h. The mixed powder passes through a 30-mesh sieve, removes the mixing ball, and then passes through a 100-mesh sieve.

[0061] c. Put the mixed alloy powder into the custom-made rubber sleeve. The rubber sleeve is made of black oil-resistant rubber. The size of the rubber sleeve can be designed according to the product situation. The powder loading process should be even. Inhomogeneity causes size irregularity of the blank after pressing.

[0062] d. Put the powd...

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Abstract

The invention discloses a preparation method of a large-size high-performance tungsten alloy material. The preparation method comprises the following steps: alloy powder is uniformly mixed to obtain amixture, the mixture is formed through cold isostatic pressing, the formed mixture is subjected to circulated sintering densification, a sintered workpiece is subjected to rough machining and splicing surface treatment, the splicing technology is carried out in an induction sintering furnace, and the spliced large-size tungsten alloy product is subjected to vaccum thermal treatment and finish machining to obtain a finished product. According to the preparation method, the technology is simple, the cost is low, the mechanical property of all parts of a product is ensured to be stable; the material composition is ensured to be uniform, the difficulty of the manufacturing technology is lowered, the material utilization ratio is increased, and the production cost is reduced. The preparation method is also suitable for splicing of tungsten alloy pieces with different densities and compositions; variable density and variable performance can be realized on one product; the requirement that the mechanical property of different parts of a specified product is different is met; the requirement to the equipment safeguarding capacity is lowered, the rate of finished products is increased, theproduction efficiency is improved, the blank of China in the field is filled, and the market application prospect is broad.

Description

technical field [0001] The invention relates to a method for preparing a large-scale high-performance tungsten alloy material product, in particular to the production of a large-scale tungsten alloy powder metallurgy part with a unit weight exceeding 500 kg and requiring relatively high mechanical properties. Background technique [0002] Because of its high melting point, high hardness, high wear resistance, excellent high temperature strength, thermal and electrical conductivity and good corrosion resistance, tungsten alloy is widely used in machinery, electronics, chemical industry, atomic energy , military, aviation, aerospace and many other fields. With the rapid development of the national military industry and the shipbuilding industry, higher requirements are put forward for large-scale powder metallurgy tungsten alloy products. While ensuring high mechanical properties, the unit weight and size of the products continue to increase. Large-size tungsten alloy parts a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/04C22C1/04B22F7/06
CPCB22F7/06B22F2998/10C22C1/045C22C27/04B22F1/0003B22F3/04B22F3/1007B22F2003/248
Inventor 陈子明尚福军黄伟冯宏伟张保玉徐国辉王登强董俊歧刘晓彬李绍义
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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