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Method for additive manufacturing of H13 steel

An additive manufacturing and 3D technology, applied in the field of additive manufacturing H13 steel, can solve the problems of shrinkage porosity, H13 cracks, easy inclusions, etc., and achieve the effects of less microstructure defects, obvious grain refinement, and uniform structure

Active Publication Date: 2021-09-21
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is difficult to process parts with complex shapes
There are serious macro-band segregation in the forging structure, and there are coarse Widmanstatten structures; after forging, internal stress is easily generated due to factors such as slow cooling and unevenness, resulting in cracks in H13, and easy inclusions or shrinkage cavities during forging loose
[0005] The above-mentioned problems affect the microstructure and properties of H13 steel, which poses challenges to the use in actual working conditions, and also limits the possibility of H13 steel application in more directions

Method used

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  • Method for additive manufacturing of H13 steel
  • Method for additive manufacturing of H13 steel
  • Method for additive manufacturing of H13 steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 As shown, a method for additively manufacturing H13 steel comprises the following steps:

[0044] S1: material selection

[0045] H13 steel powder with a thickness of 15-25 μm is selected. The H13 steel powder is composed of the following mass percentages: C content 0.32%, Si content 0.80%, Mn content 0.20%, Cr content 4.75%, Mo content 1.10%, V content 0.80%, P The content is 0.01%, the S content is 0.01%, and the balance is Fe; the average sphericity of H13 steel powder is SPHT=0.906, the powder fluidity is 23.4s / 50g, and the bulk density is 3.951g / cm 3 , the tap density is 4.793g / cm 3 ,, such H13 steel powder has good forming effect in additive manufacturing, and has high strength after forming;

[0046] S2: dry

[0047] Dry the H13 steel powder selected in step S1 under a protective atmosphere, the protective atmosphere used is argon or nitrogen, the drying temperature is 60°C, and the drying time is 24h to ensure that the H13 steel powder is fu...

Embodiment 2

[0055] Such as figure 1 As shown, a method for additively manufacturing H13 steel comprises the following steps:

[0056] S1: material selection

[0057] H13 steel powder with a thickness of 25-35 μm is selected. The H13 steel powder is composed of the following mass percentages: C content 0.35%, Si content 1%, Mn content 0.3%, Cr content 5%, Mo content 1.5%, V content 1%, P The content is 0.02%, the S content is 0.02%, and the balance is Fe; the average sphericity of H13 steel powder is SPHT=0.906, the powder fluidity is 23.4s / 50g, and the bulk density is 3.951g / cm 3 , the tap density is 4.793g / cm 3 ,, such H13 steel powder has good forming effect in additive manufacturing, and has high strength after forming;

[0058] S2: dry

[0059] Dry the H13 steel powder selected in step S1 under a protective atmosphere, the protective atmosphere used is argon or nitrogen, the drying temperature is 60-80°C, and the drying time is 24h to ensure that the H13 steel powder is fully drie...

Embodiment 3

[0067] Such as figure 1 As shown, a method for additively manufacturing H13 steel comprises the following steps:

[0068] S1: material selection

[0069] H13 steel powder with a thickness of 35-45 μm is selected. The H13 steel powder is composed of the following mass percentages: C content 0.45%, Si content 1.20%, Mn content 0.50%, Cr content 5.50%, Mo content 1.75%, V content 1.20%, P The content is 0.03%, the S content is 0.03%, and the balance is Fe; the average sphericity of H13 steel powder is SPHT=0.906, the powder fluidity is 23.4s / 50g, and the bulk density is 3.951g / cm 3 , the tap density is 4.793g / cm 3 ,, such H13 steel powder has good forming effect in additive manufacturing, and has high strength after forming;

[0070] S2: dry

[0071] Dry the H13 steel powder selected in step S1 under a protective atmosphere, the protective atmosphere used is argon or nitrogen, the drying temperature is 80°C, and the drying time is 24h to ensure that the H13 steel powder is fu...

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Abstract

The invention discloses a method for additive manufacturing of H13 steel, and relates to the technical field of additive manufacturing die steel rear end heat treatment. The method comprises the following steps: S1, material selection: selecting 15-53 [mu] m H13 steel powder; S2, drying: drying the H13 steel powder in a protective atmosphere; S3, printing: printing the H13 steel on CAD modeling software; S4, performing solution treatment: performing solution treatment on a H13 steel profile formed through additive manufacturing; S5, performing aging heat treatment: performing double aging heat treatment on the H13 steel profile subjected to solid solution treatment and then air cooling to the room temperature. Compared with casting-state H13 steel, the printing-state H13 steel subjected to the heat treatment process has the advantages that the internal microstructure defects are fewer, pores are greatly reduced, grain refinement is obvious, and the microstructure is uniform.

Description

technical field [0001] The invention relates to the technical field of back-end heat treatment of additive manufacturing die steel, in particular to a method for additive manufacturing of H13 steel. Background technique [0002] Additive Manufacturing technology (Additive Manufacturing, AM) is a new material processing technology that has emerged in the field of metal processing in recent years. It uses high-energy density lasers or electron beam emitters as heat sources, and the energy spot is concentrated at 20-100 μm. Within the range, selecting spherical metal powder with a melting particle diameter between 5 and 50 μm can obtain complex metal components with a high degree of freedom, and produce nearly 100% high-density parts. The development of such processing technology has driven the rapid development of my country's mold steel industry. Mold is called the "mother of industry", and many processing and manufacturing industries rely on the mold industry to develop on a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B22F1/00B22F10/64C22C38/02C22C38/04C22C38/22C22C38/24B33Y10/00B33Y40/10B33Y40/20B33Y70/00
CPCB22F10/28B22F10/64C22C38/02C22C38/04C22C38/22C22C38/24B33Y10/00B33Y40/10B33Y40/20B33Y70/00Y02P10/25
Inventor 刘世锋韩李雄王岩魏瑛康杨鑫支浩
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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