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24CrNiMoRe alloy steel powder of laser additives and production method thereof

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

Active Publication Date: 2017-02-15
NORTHEASTERN UNIV
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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 and 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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  • 24CrNiMoRe alloy steel powder of laser additives and production method thereof
  • 24CrNiMoRe alloy steel powder of laser additives and production method thereof
  • 24CrNiMoRe alloy steel powder of laser additives and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The preparation method for laser additive manufacturing of 24CrNiMoRe alloy steel powder specifically includes the following steps:

[0069] Step 1, preprocessing:

[0070] (1) The raw material 24CrNiMoRe alloy steel is made into a circular truncated steel ingot, the diameter of the upper surface of the circular truncated steel ingot is D 1 For Φ105mm, the diameter of the lower surface D 2 Φ90mm, height H 1 is 200mm; through holes are machined in the center of the ingot, the diameter of the through holes is D 3 is Φ20mm; then the lower surface of the ingot is processed to a height H 2 It is 25mm, the chamfering angle θ is a 40° slope so that it is tightly assembled with the bottom of the crucible, and the inner and outer surface roughness of the steel ingot is Ra13.0;

[0071] (2) Clean the processed 24CrNiMoRe alloy steel ingot and place it in the crucible induction melting atomization device. The specific operations are:

[0072] Use 1000-2000 metallographic sand...

Embodiment 2

[0105] The preparation method of laser additive manufacturing 24CrNiMoRe alloy steel powder specifically includes the following steps:

[0106] Step 1, preprocessing:

[0107] (1) The raw material 24CrNiMoRe alloy steel is made into a circular truncated steel ingot, the diameter of the upper surface of the circular truncated steel ingot is D 1 For Φ105mm, the diameter of the lower surface D 2 Φ90mm, height H 1 is 200mm; through holes are machined in the center of the ingot, the diameter of the through holes is D 3 is Φ30mm; then the lower surface of the ingot is processed to a height H 2 It is 30mm, the chamfering angle θ is 50° slope, so that it can be assembled more closely with the bottom of the crucible, and the inner and outer surface roughness of the steel ingot is Ra15.0;

[0108] (2) Clean the processed 24CrNiMoRe alloy steel ingot and place it in the crucible induction melting atomization device. The specific operations are:

[0109] Use 1000-2000 metallographic ...

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 truncated steel ingot, and the diameter of the upper surface of the truncated steel ingot is D 1 Φ105mm, lower surface diameter D 2 Φ90mm, height H 1 is 200mm; a through hole is processed in the center of the steel ingot, and the diameter of the through hole is D 3 Φ30mm; then process the lower surface of the ingot to a height H 2 28mm, the chamfer angle θ is 45° so that it fits closely with the bottom of the crucible, and the roughness of the inner and outer surfaces of the 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 operation is:

[0146] Use No. 1000-2000 metallographic sandpaper to remove oxides and impurities on the surfac...

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Abstract

The invention discloses 24CrNiMoRe alloy steel powder of laser additives and a production method thereof. The alloy steel powder is composed of, by weight, 0.23-0.27% of C, 0.90-1.15% of Cr, 0.90-1.15% of Ni, 0.45-0.60% of Mo, 0.90-1.15% of Mn, 0.30-0.45% of Si, 1-2% of Re(Y) and the balance Fe. The alloy steel powder is spherical, the particle size is 1-180 micrometers, the apparent density is 4.74-4.97 g / cm<3>, and the hollow sphere rate is smaller than 2%. The mobility of the 24CrNiMoRe alloy steel powder with the particle size being 1-50 micrometers is 15.6-18.7s / 50g, and the mobility of the 24CrNiMoRe alloy steel powder with the particle size being 50-180 micrometers is 14.3-15.1s / 50g. According to the production method, the spherical powder with the mobility being good, the particle size being controllable, the hollow sphere rate being low and the structure toughness being high can be produced through vacuum crucible induction smelting and gas atomizing methods and by adjusting the technological parameters of gas atomizing and can be applied to laser additive manufacturing of friction parts of brake discs of high-speed rails.

Description

technical field [0001] The invention belongs to the technical field of preparation of high-performance alloy steel powder for laser additive manufacturing, and specifically relates to a spherical 24CrNiMoRe alloy steel powder for laser additive manufacturing and a preparation method thereof. [0002] technical background [0003] 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 high-speed rail manufacturing, and high-speed rail is ...

Claims

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Application Information

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Patent Type & Authority Applications(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
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