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Method for preparing martensite aging steel based on injection molding

A maraging steel, injection molding technology, applied in the field of steel materials, can solve the problems affecting the comprehensive performance of the final product, high equipment requirements, complex processes, etc., to solve the problems of side effects, high reactivity and broad market prospects. Effect

Active Publication Date: 2018-11-30
湖南菲德克材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned patents use physical degreasing, such as thermal degreasing or ultrasonic degreasing. Thermal degreasing has disadvantages such as too high temperature and high equipment requirements, while ultrasonic degreasing has disadvantages such as high equipment requirements, complicated process, and high cost.
If the degreasing method of the above patent is replaced by catalytic degreasing, the problems of temperature, process and cost can be solved, but nitric acid will be used as degreasing agent in the catalytic degreasing process, and nitric acid will corrode cobalt in the alloy composition during the degreasing process, affecting Comprehensive performance of the final product

Method used

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  • Method for preparing martensite aging steel based on injection molding
  • Method for preparing martensite aging steel based on injection molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A maraging steel, which includes the following components in mass percentage: 18% Ni, 9% Co, 6% Mo, the balance is Fe and unavoidable impurities. The preparation method of the above-mentioned maraging steel comprises the following steps:

[0030] (1) Ni, Co, Mo, Fe atomized alloy powders are prepared by atomization method, wherein, the mass percentages of Ni, Co, Mo, Fe in the control alloy powders are respectively: 18%, 18% and 12%, the balance Fe and unavoidable impurities;

[0031] (2) carbonyl nickel and carbonyl iron are mixed to obtain carbonyl powder, and the mass percentages of carbonyl nickel and carbonyl iron are controlled to be 18% and 82%;

[0032] (3) Mix the atomized alloy powder obtained in step (1) with the carbonyl powder in step (2) at a mass ratio of 1:1 to obtain a premix (tap density is 5.2g / cm 3 );

[0033] (4) Mix the premix in the step (3) with the binder and carry out banburying, and after banburying is uniform, crush to obtain granular feed...

Embodiment 2

[0039] A maraging steel, which includes the following components in mass percentage: 18% Ni, 9% Co, 6% Mo, the balance is Fe and unavoidable impurities. The preparation method of the above-mentioned maraging steel comprises the following steps:

[0040] (1) Ni, Co, Mo, Fe atomized alloy powders are prepared by atomization method, wherein, the mass percentages of Ni, Co, Mo, Fe in the control alloy powders are respectively: 18%, 18% and 12%, the balance Fe and unavoidable impurities;

[0041] (2) carbonyl nickel and carbonyl iron are mixed to obtain carbonyl powder, and the mass percentages of carbonyl nickel and carbonyl iron are controlled to be 18% and 82%;

[0042] (3) Mix the atomized alloy powder obtained in step (1) with the carbonyl powder in step (2) at a mass ratio of 1:1 to obtain a premix (tap density is 5.2g / cm 3 );

[0043] (4) Mix the premix in the step (3) with the binder and carry out banburying, and after banburying is uniform, crush to obtain granular feed; ...

Embodiment 3

[0049] A maraging steel, which includes the following components in mass percentage: 18% Ni, 9% Co, 6% Mo, the balance is Fe and unavoidable impurities. The preparation method of the above-mentioned maraging steel comprises the following steps:

[0050] (1) Prepare Ni, Co, Mo, Fe atomized alloy powder by atomization method, wherein, the mass percent of Ni, Co, Mo, Fe in the control alloy powder is respectively: 18%, 13.5% and 9%, balance Fe and unavoidable impurities;

[0051] (2) carbonyl nickel and carbonyl iron are mixed to obtain carbonyl powder, and the mass percentages of carbonyl nickel and carbonyl iron are controlled to be 18% and 82%;

[0052] (3) Mix the atomized alloy powder obtained in step (1) with the carbonyl powder in step (2) in a mass ratio of 2:1 to obtain a premix (tap density is 4.8g / cm 3 );

[0053] (4)-(8) are the same as steps (4)-(8) of Example 1.

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Abstract

The invention discloses a method for preparing martensite aging steel based on injection molding. The martensite aging steel comprises Fe and the following components in percentage by mass: 17.5-18.5%of Ni, 8.5-9.5% of Co, 4.5-5.5% of Mo; and the method comprises the following steps: (1) Ni, Co, Mo and Fe atomizing alloy powder is prepared; (2) other components in the martensite aging steel are added in a form of carbonyl powder; and atomizing alloy powder in the step (1) and the carbonyl powder are mixed according to a mass ratio of (0.5-2): 1 to obtain a premixture; (3) the premixture and abinding agent are mixed for banburying, and is injected for molding by an injection molding machine; (4) nitric acid is used for catalytic degreasing; (5) the sintering is performed; and (6) the heattreatment is performed. In catalytic degreasing, the corrosion of Co by nitric acid can be prevented, so that the comprehensive performance of the martensite aging steel is excellent, the yield strength and the tensile strength are high, and the hardness is higher.

Description

technical field [0001] The invention belongs to the field of steel materials, in particular to a preparation method of maraging steel. Background technique [0002] Maraging steel is a kind of ultra-high strength steel. The outstanding advantage of maraging steel is 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. [0003] Metal Injection Molding (MIM for short) is a new powder metallurgy technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy. Generally, metals or alloys that can be made into powder can be processed by metal injection molding technology, which is widely used in the production of small, three-dimensional complex shapes and products with special performance requirements. The basic process of metal injection moldi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00B22F3/22B22F3/10B22F3/24C22C33/02C22C38/12C22C38/10C22C38/08
CPCC22C33/0285C22C38/105C22C38/12B22F3/1025B22F3/225B22F3/24B22F9/082B22F2003/248B22F2003/247B22F2998/10B22F1/103B22F1/10
Inventor 陈明进黄永雄
Owner 湖南菲德克材料科技有限公司
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