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Milling method of metal powder

A metal powder and grinding technology, applied in the field of metal powder grinding, can solve the problems of the influence of physical properties of parts, work hardening, and inability to meet mechanical properties, and achieve the effect of satisfying mechanical properties and eliminating work hardening.

Inactive Publication Date: 2013-02-06
张丽群
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production process of powder metallurgy, metal powder is first prepared, and mechanical pulverization and physical and chemical methods are used to manufacture metal powder. Work hardening is easy to occur in the process of mechanical pulverization. performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for grinding metal powder, comprising the steps of:

[0016] a. Weigh each metal raw material: 70kg of iron, 40kg of copper, 5kg of nickel, 5kg of tin, 4kg of aluminum and 3kg of cobalt;

[0017] b. After the above-mentioned metal raw materials are mixed and prepared, they are crushed to 10mm long coarse crushing with a crusher, and machined into 9mm long metal wires;

[0018] C, above-mentioned metal wire adopts vortex milling, and milling becomes the fine powder that can cross 200 mesh sieves;

[0019] d. Carry out annealing treatment to the fine powder to eliminate work hardening. The annealing treatment includes high temperature treatment and cooling treatment. The high temperature treatment is 10 hours at a temperature of 750° C., and the cooling treatment is at a temperature of 40° C. for 8 hours, and cooling water is sprayed.

Embodiment 2

[0021] A method for grinding metal powder, comprising the steps of:

[0022] a. Weigh each metal raw material: 75kg of iron, 45kg of copper, 7kg of nickel, 7kg of tin, 5kg of aluminum and 5kg of cobalt;

[0023] b. After the above-mentioned metal raw materials are mixed and prepared, they are crushed to 15mm long coarse crushing with a crusher, and machined into 9.5mm long metal wires;

[0024] C, above-mentioned metal wire adopts vortex milling, and milling becomes the fine powder that can cross 210 mesh sieves;

[0025] d. Carry out annealing treatment to fine powder to eliminate work hardening. Annealing treatment includes high temperature treatment and cooling treatment, high temperature treatment for 12 hours, adopting a temperature of 830°C, cooling treatment for 10 hours, adopting a temperature of 50°C, and using cooling water spray.

Embodiment 3

[0027] A method for grinding metal powder, comprising the steps of:

[0028] a. Weigh each metal raw material: 80kg of iron, 50kg of copper, 10kg of nickel, 10kg of tin, 7kg of aluminum and 7kg of cobalt;

[0029] b. After the above-mentioned metal raw materials are mixed and prepared, they are crushed to 20mm long coarse crushing with a crusher, and machined into 10mm long metal wires;

[0030] C, above-mentioned metal wire adopts vortex milling, and milling becomes the fine powder that can cross 220 mesh sieves;

[0031] d. Perform annealing treatment on the fine powder to eliminate work hardening. The annealing treatment includes high temperature treatment and cooling treatment. The high temperature treatment is 15 hours at a temperature of 920° C., and the cooling treatment is 12 hours at a temperature of 60° C. and sprayed with cooling water.

[0032] Mechanical crushing, re-cutting, and post-grinding are used to form metal powder, which is then annealed to eliminate wor...

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PUM

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Abstract

The invention discloses a milling method of metal powder. The milling method comprises the following steps of: weighing the following metal materials in parts by weight: 70-80 parts of ferrum, 40-50 parts of copper, 5-10 parts of nickel, 5-10 parts of stannum, 4-7 parts of aluminum and 3-7 parts of cobalt; after the metal materials are prepared according to proportion by weight, crushing the metal materials by a crushing machine to coarse fragments with the length of 10mm-20mm, and mechanically cutting and machining the fragments into metal wires with the length of 9mm-10mm; vortically milling the metal wires into fine powder capable of passing through a sieve of 200-220 meshes; and carrying out annealing treatment on the fine powder to eliminate work hardening. The milling method has the advantages that the mechanical properties of the metal power are satisfied by virtue of the procedures of mechanical crushing, cutting and milling to form the metal powder, and annealing treatment to eliminate the work hardening.

Description

technical field [0001] The invention relates to a grinding method of metal powder. Background technique [0002] In the production process of powder metallurgy, metal powder is first prepared, and mechanical pulverization and physical and chemical methods are used to manufacture metal powder. Work hardening is easy to occur in the process of mechanical pulverization. performance. Therefore, it is necessary to provide a new technical solution to solve the above problems. Contents of the invention [0003] The purpose of the present invention is to provide a grinding method of metal powder, which can eliminate the processing hard force and satisfy the mechanical properties. [0004] The technical scheme adopted in the present invention is: [0005] A method for grinding metal powder, comprising the steps of: [0006] a. Weigh each metal raw material by weight: 70-80 parts of iron, 40-50 parts of copper, 5-10 parts of nickel, 5-10 parts of tin, 4-7 parts of aluminum and 3...

Claims

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Application Information

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IPC IPC(8): B22F1/00
Inventor 张丽群
Owner 张丽群
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