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Metal powder injection molded high-strength martensite aged steel and preparation method thereof

A maraging steel and injection molding technology, which is applied in the field of metal powder injection molding high-strength maraging steel and its manufacturing, can solve the problems of high content and high price, and achieve the goal of improving production efficiency and reducing production costs Effect

Active Publication Date: 2014-08-13
HAIAN YINGQIU POWDER METALLURGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, maraging steel is widely used to make molds in foreign countries; but in China, because maraging steel contains Ni, Co and other precious metal elements, and the content is high and the price is expensive, it is still difficult to be widely used.

Method used

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  • Metal powder injection molded high-strength martensite aged steel and preparation method thereof
  • Metal powder injection molded high-strength martensite aged steel and preparation method thereof
  • Metal powder injection molded high-strength martensite aged steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: Metal powder injection molding high-strength maraging steel and its manufacturing method. In terms of weight percentage, the composition of the maraging steel includes: Ni 17%, Co 8%, Mo 4.5%, C 0.08% , and the balance is iron and unavoidable impurities.

[0022] like figure 1 , figure 2 , image 3 As shown, the manufacturing method of the metal powder injection molding high-strength maraging steel, the specific steps are as follows:

[0023] (1) MIM powder mixing: MIM has high requirements for raw material powder, and the selection of powder is beneficial to mixing, injection molding, degreasing and sintering. In terms of weight percentage, 17% of carbonyl Ni powder, 8% of fine Co element powder (average particle size ≤ 2.5um), 4.5% of ultrafine Mo element powder (320 mesh), and the rest is carbonyl iron powder and unavoidable powder The composition of the proportioning composition is fully mixed (loading capacity 92%); it is mixed with a Y-type mixi...

Embodiment 2

[0032] Embodiment 2: Metal powder injection molding high-strength maraging steel and its manufacturing method. In terms of weight percentage, the composition of the maraging steel includes: Ni 18%, Co 9%, Mo5.5%, C 0.07 %, the balance is iron and unavoidable impurities.

[0033] like figure 1 , figure 2 , image 3 As shown, the manufacturing method of the metal powder injection molding high-strength maraging steel, the specific steps are as follows:

[0034] (1) MIM powder mixing: In terms of weight percentage, 18% carbonyl Ni powder, 9% fine Co element powder, 5.5% ultrafine Mo element powder, and the rest are carbonyl iron powder and unavoidable powder ratio composition The composition is fully mixed; Y-type mixing equipment is used for mixing, the rotating speed is 13 rpm, and the time is 3.5 hours;

[0035] (2) Adhesive mixing: a combined adhesive consisting of 50% high-density polyethylene, 10% paraffin wax and 40% Brazilian wax in a weight ratio by using a wax-based...

Embodiment 3

[0043] Example 3: Metal powder injection molding high-strength maraging steel and its manufacturing method. In terms of weight percentage, the composition of the maraging steel includes: Ni 19%, Co 10%, Mo 6.5%, C 0.06% , and the balance is iron and unavoidable impurities.

[0044] like figure 1 , figure 2 , image 3 As shown, the manufacturing method of the metal powder injection molding high-strength maraging steel, the specific steps are as follows:

[0045] (1) MIM powder mixing: In terms of weight percentage, 19% carbonyl Ni powder, 10% fine Co element powder, 6.5% ultrafine Mo element powder, and the rest are carbonyl iron powder and unavoidable powder ratio composition The composition is fully mixed; Y-type mixing equipment is used for mixing, the rotating speed is 15 rpm, and the time is 4 hours;

[0046] (2) Adhesive mixing: a combined adhesive consisting of 50% high-density polyethylene, 10% paraffin wax and 40% Brazilian wax in a weight ratio by using a wax-bas...

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Abstract

The invention relates to the technical field of martensite aged steel and preparation methods thereof and particularly relates to metal powder injection molded high-strength martensite aged steel and a preparation method thereof. The metal powder injection molded high-strength martensite aged steel contains the following ingredients in percentage by weight: 17-19% of Ni, 8-10% of Co, 4.5-6.5% of Mo, not higher than 0.08% of C and the balance of Fe and unavoidable impurities. The preparation method of the metal powder injection molded high-strength martensite aged steel comprises the following steps: adding a binder to the above powder materials according to a certain proportion to form a combination, mixing and milling the combination, crushing, injection molding, degreasing, sintering, carrying out solution treatment and ageing. By replacing a smelting production process with a metal injection molding process, three-dimensional irregular metal powder injection molded high-strength martensite aged steel structural parts can be manufactured through one-time molding; by adopting second-time solid-solution process treatment and ageing treatment, the metal powder injection molded high-strength martensite aged steel has the advantages that the tensile strength is over 1,500MPa, the elongation percentage is 10%, the impact strength is over 50J / cm<2>, and the hardness is HRC40-48.

Description

technical field [0001] The invention relates to the technical field of maraging steel and its manufacturing method, in particular to metal powder injection molding high-strength maraging steel and its manufacturing method. Background technique [0002] Maraging steel is a kind of ultra-high-strength steel. The outstanding advantages of this steel are that the heat treatment process is simple and convenient. After solid solution, it is mechanically processed first and then aged. The heat treatment deformation is small, and the processing performance and welding performance are very good. . In recent years, maraging steel is widely used to make molds in foreign countries; but in China, because maraging steel contains Ni, Co and other precious metal elements, and the content is high and the price is expensive, it is still difficult to be widely used. This type of steel is mainly used for precision forging dies and plastic molds, and the main production process is smelting. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/12B22F3/22B22F3/24
Inventor 申承秀王春官
Owner HAIAN YINGQIU POWDER METALLURGY CO LTD
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