Laser additive 24crnimore alloy steel powder and preparation method

A laser additive and alloy steel technology, applied in additive processing, metal processing equipment, transportation and packaging, etc., can solve the problems of limited mechanical processing equipment, complex heat treatment process, high manufacturing cost, etc., to promote application and rapid development Effect

Active Publication Date: 2018-06-22
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, high-speed rail brake discs are mainly manufactured by traditional casting heat treatment methods, which have problems such as high manufacturing costs, complicated heat treatment procedures, and limited machining equipment. At the same time, the core technology is monopolized by foreign countries and has formed related technical protection.

Method used

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  • Laser additive 24crnimore alloy steel powder and preparation method
  • Laser additive 24crnimore alloy steel powder and preparation method
  • Laser additive 24crnimore alloy steel powder and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Be used for the preparation method of laser additive manufacturing 24CrNiMoRE alloy steel powder, specifically comprise the following steps:

[0067] Step 1, preprocessing:

[0068] (1) The raw material 24CrNiMoRE alloy steel is made into a conical ingot, the diameter D1 of the upper surface of the conical ingot is Φ105mm, the diameter D2 of the lower surface is Φ90mm, and the height H1 is 200mm; a through hole is processed in the center of the ingot, and the diameter D3 of the through hole is Φ20mm ; Then process the lower surface of the steel ingot to a height H2 of 25mm, and a chamfer angle θ of 40° to fit closely with the bottom of the crucible. The roughness of the inner and outer surfaces of the steel ingot is Ra13.0;

[0069] (2) Clean the processed 24CrNiMoRE alloy steel ingot and place it in the crucible induction melting atomization device, the specific operations are:

[0070] Use No. 1000-2000 metallographic sandpaper to remove oxides and impurities on the ...

Embodiment 2

[0104] The preparation method of laser additive manufacturing 24CrNiMoRE alloy steel powder specifically comprises the following steps:

[0105] Step 1, preprocessing:

[0106] (1) The raw material 24CrNiMoRE alloy steel is made into a conical ingot, the diameter D1 of the upper surface of the conical ingot is Φ105mm, the diameter D2 of the lower surface is Φ90mm, and the height H1 is 200mm; a through hole is processed in the center of the ingot, and the diameter D3 of the through hole is Φ30mm ; Then process the lower surface of the steel ingot with a height H2 of 30mm and a chamfer angle θ of 50° so that it can be more closely assembled with the bottom of the crucible. The roughness of the inner and outer surfaces of the steel ingot is Ra15.0;

[0107] (2) Clean the processed 24CrNiMoRE alloy steel ingot and place it in the crucible induction melting atomization device. The specific operations are:

[0108] Use No. 1000-2000 metallographic sandpaper to remove oxides and imp...

Embodiment 3

[0142] The preparation method of laser additive manufacturing 24CrNiMoRE alloy steel powder specifically comprises the following steps:

[0143] Step 1, preprocessing:

[0144] (1) The raw material 24CrNiMoRE alloy steel is made into a conical ingot, the diameter D1 of the upper surface of the conical ingot is Φ105mm, the diameter D2 of the lower surface is Φ90mm, and the height H1 is 200mm; a through hole is processed in the center of the ingot, and the diameter D3 of the through hole is Φ30mm ; Then the lower surface of the steel ingot is processed to a height H2 of 28mm, and the chamfer angle θ is 45° so that it can be tightly assembled with the bottom of the crucible. The roughness of the inner and outer surfaces of the steel ingot is Ra15.0;

[0145] (2) Clean the processed 24CrNiMoRE alloy steel ingot and place it in the crucible induction melting atomization device, the specific operations are:

[0146] Use No. 1000-2000 metallographic sandpaper to remove oxides and im...

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Abstract

A laser-added 24CrNiMoRE alloy steel powder and its preparation method. The chemical composition of the alloy steel powder is by mass percentage: C: 0.23-0.27%, Cr: 0.90-1.15%, Ni: 0.90-1.15%, Mo: 0.45-0.60%, Mn: 0.90~1.15%, Si: 0.30~0.45%, Y: 1~2%, the balance is Fe; the shape of alloy steel powder is spherical, the particle size is 1~180μm, and the bulk density is 4.74~4.97g / cm3 , the hollow sphere rate is less than 2%; the fluidity of 24CrNiMoRE alloy steel powder with a particle size of 1 to 50 μm is 15.6 to 18.7 s / 50g, and the fluidity of 24CrNiMoRE alloy steel powder with a particle size of 50 to 180 μm is 14.3 to 15.1 s / 50g; preparation Method: Using the vacuum crucible induction melting gas atomization method, by adjusting the gas atomization process parameters, a powder with spherical shape, good fluidity, controllable particle size range, low hollow sphere rate, and strong and tough structure was prepared, which was applied to high-speed rail Laser additive manufacturing of brake disc friction parts.

Description

technical field [0001] The invention belongs to the technical field of preparation of high-performance alloy steel powder for laser additive manufacturing, in particular to a spherical 24CrNiMoRE alloy steel powder for laser additive manufacturing and a preparation method thereof. Background technique [0002] After decades of development, the laser additive manufacturing technology of metal parts has become one of the new industrialization technologies that are being developed at home and abroad. Among them, high-performance alloy steel is an important material for manufacturing metal parts, and plays a key role in the fields of rail transit, nuclear power, metallurgy, and machinery manufacturing. With the rapid development of manufacturing technology, the use of advanced additive manufacturing technology to manufacture key components has shown great momentum. vitality. my country is a big country in the manufacture of high-speed rail, and high-speed rail is a strategic le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44C22C38/04C22C38/02B22F1/00B22F9/08B33Y70/00
CPCC22C38/005C22C38/02C22C38/04C22C38/44B22F9/082B33Y70/00B22F2009/0848B22F1/065
Inventor 陈岁元魏明炜孙苗郭快快梁京刘常升
Owner NORTHEASTERN UNIV LIAONING
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