Powder used in laser additive manufacturing of iron-based alloys with inner toughness and outer rigidity

An iron-based alloy, laser additive technology, applied in the directions of additive manufacturing, additive processing, process efficiency improvement, etc., to achieve the effects of high hardness, good bonding, and good engineering application prospects

Active Publication Date: 2019-12-06
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This has a profound impact on traditional processing and manufacturing industries

Method used

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  • Powder used in laser additive manufacturing of iron-based alloys with inner toughness and outer rigidity
  • Powder used in laser additive manufacturing of iron-based alloys with inner toughness and outer rigidity
  • Powder used in laser additive manufacturing of iron-based alloys with inner toughness and outer rigidity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The mass percentage of the powder composition is C: 0.05%, Cr: 1.40%, Ni: 1.70%, Si: 1.00%, Mo: 0.50%, Mn: 0.10%, B: 0.40%, V: 0.50%, and the rest is Fe. The particle size of the powder is 53~140 microns.

[0053] The high-toughness low-alloy steel in the core is prepared by laser melting deposition technology. The specific preparation process steps are:

[0054] 1) The alloy raw materials of the above components are vacuum smelted, gas atomized and screened to obtain spherical powder; the obtained spherical powder has a happy ball rate ≤ 2%, an oxygen content ≤ 250ppm, and an impurity content < 0.5%. Fluidity≤16s / 50g; bulk density of spherical powder≥4.35g / cm3;

[0055] 2) Dry the powder obtained in step 1 in an oven at 80°C for more than 3 hours;

[0056] 3) The surface of the low-alloy steel substrate is coated with 60 # -600 # After sanding, cleaning and drying, the low-alloy steel powder obtained in step 2 is irradiated by a fiber laser processing system by mea...

Embodiment 2

[0060] The mass percentage of low alloy steel powder is C: 0.05%, Cr: 1.40%, Ni: 1.70%, Si: 1.00%, Mo: 0.50%, Mn: 0.10%, B: 0.40%, V: 0.50% and the rest is Fe. The mass percentage of wear-resistant iron-based alloy powder is C: 0.78%, Cr: 18.83%, Ni: 1.54%, Si: 1.14%, Mo: 0.91%, Mn: 0.45%, B: 1.13%, Al: 0.08% , V: 2.00%, the rest is Fe. The particle size of the powder is 53~140 microns.

[0061] The laser melting deposition technology is used to prepare the wear-resistant iron-based alloy with inner toughness and outer rigidity. The specific preparation process steps are:

[0062] 1) The alloy raw materials of the above components are vacuum smelted, gas atomized and sieved to obtain spherical powder; the obtained spherical powder has a happy ball rate ≤ 2%, an oxygen content ≤ 250ppm, and an impurity content < 0.5 %, fluidity ≤16s / 50g; bulk density of spherical powder ≥4.35g / cm3;

[0063] 2) Dry the powder obtained in step 1 in an oven at 80°C for more than 3 hours;

[0...

Embodiment 3

[0070] The mass percentage of low alloy steel powder is C: 0.10%, Cr: 1.50%, Ni: 1.85%, Si: 1.15%, Mo: 0.55%, Mn: 0.30%, B: 0.55%, V: 0.55%, and the rest For Fe. The mass percentage of wear-resistant iron-based alloy powder is C: 1.18%, Cr: 20.44%, Ni: 1.44%, Si: 1.13%, Mo: 0.85%, Mn: 0.42%, B: 1.06%, Al: 0.12% , V: 4.00%, the rest is Fe. The particle size of the powder is 53~140 microns.

[0071] The laser melting deposition technology is used to prepare the wear-resistant iron-based alloy with inner toughness and outer rigidity. The specific preparation process steps are:

[0072]1) The alloy raw materials of the above components are vacuum smelted, gas atomized and sieved to obtain spherical powder; the obtained spherical powder has a happy ball rate ≤ 2%, an oxygen content ≤ 250ppm, and an impurity content < 0.5 %, fluidity ≤16s / 50g; bulk density of spherical powder ≥4.35g / cm3;

[0073] 2) Dry the powder obtained in step 1 in an oven at 80°C for more than 3 hours;

[...

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Abstract

The invention provides a powder material for laser additive manufacturing of an inner tough outer rigid wear-resistant iron-based alloy. The inner alloy powder used is a low-alloy steel powder material, and the outer alloy powder material is a wear-resistant iron-based alloy composite powder material. Using laser melting deposition technology, fiber laser processing system is used for laser additive manufacturing of iron-based alloy components with inner toughness and outer rigidity, and the prepared iron-based alloy has uniform structure, high surface strength, high hardness, and excellent core toughness. Features, used to manufacture shaft parts with complex shapes, large sizes, and high requirements for toughness and wear resistance. It can provide alloy powder for laser additive manufacturing of iron-based alloy shaft parts with inner toughness and outer rigidity. Material.

Description

technical field [0001] The invention relates to the technical field of laser additive manufacturing of new materials, in particular to a method for forming powder materials used in laser additive manufacturing of inner tough outer rigid wear-resistant iron-based alloys and components thereof. Background technique [0002] Iron-based alloys are widely used in various fields of the national economy due to their advantages such as wide sources, low price, and good comprehensive performance. With the development of society, the requirements for the performance of iron-based alloy materials are increasing. Camshafts are high wear-resistant and high-toughness alloy components mainly made of iron-based alloys, and are widely used in diesel engines. Due to the needs of energy saving and emission reduction, the weight and volume of new engines are gradually reduced, and the load on the camshaft is gradually increasing. For example, the camshaft load of conventional vehicles is genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/105B22F7/02B22F9/08B33Y70/00B33Y10/00C22C38/02C22C38/44C22C38/04C22C38/54C22C38/46C22C38/56C22C38/06C22C33/02
CPCB22F1/0003C22C33/0264C22C33/0285C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/54C22C38/56B22F7/02B22F9/082B33Y10/00B33Y70/00B22F10/00B22F10/322B22F10/22B22F10/34B22F10/366B22F10/32Y02P10/25
Inventor 张松崔雪张春华王海洋刘也川王强吴臣亮
Owner SHENYANG POLYTECHNIC UNIV
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