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Conformal water-cooled injection mold steel part and preparation method thereof

An injection mold and water-cooling technology, applied in the direction of solid-state diffusion coating, coating, additive processing, etc., can solve the problems of low surface strength, surface pores and ablation tumors, and unsatisfactory performance, so as to improve the rate of ion nitriding , to achieve the effect of preparation and reduce heat treatment defects

Active Publication Date: 2022-04-15
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if this aging-nitriding process is copied to the selective laser melting molding mold, it will easily cause heat treatment defects, such as composition segregation, low surface strength, cracking, surface pores and ablation tumors, etc.
Although nitriding can theoretically improve the quality and life of molds formed by selective laser melting technology, the performance of the traditional peak aging-nitriding process directly applied to laser-molded injection mold steel parts is not ideal. The basic research of nitriding has not been reported publicly

Method used

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  • Conformal water-cooled injection mold steel part and preparation method thereof
  • Conformal water-cooled injection mold steel part and preparation method thereof
  • Conformal water-cooled injection mold steel part and preparation method thereof

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Effect test

Embodiment 1

[0060] The application provides a method for preparing a conformal water-cooled injection mold steel part, which comprises the following steps:

[0061] (1) CAD software is used to design the conformal water-cooled mold according to the requirements of the processed parts.

[0062] (2) and use selective laser melting technology to melt 18Ni maraging steel powder to prepare as figure 1 The shown conformal water-cooled injection mold component 1 includes a conformal cooling waterway 2 , a waterway outlet 3 and a waterway inlet 4 .

[0063] Among them, the mold samples obtained by additive manufacturing using selective laser melting technology are sequentially subjected to solid solution treatment and low temperature pre-aging treatment;

[0064] Among them, when the mold sample is formed by selective laser melting, the laser power is 265W, the scanning speed is 1000mm / s, the powder layer thickness is 40μm, and the scanning distance is 100μm; the working atmosphere is Ar, and th...

Embodiment 2

[0083] The application provides a method for preparing a conformal water-cooled injection mold steel part, which comprises the following steps:

[0084] (1) CAD software is used to design the conformal water-cooled mold according to the requirements of the processed parts.

[0085] (2) and use the selective laser melting technology to melt the corrosion-resistant stainless steel powder with a Cr content higher than 12wt.%, and prepare such as figure 1 A conformal water-cooled injection mold part 1 is shown.

[0086] Among them, the mold samples obtained by additive manufacturing using selective laser melting technology are sequentially subjected to solid solution treatment and low temperature pre-aging treatment;

[0087] Among them, when the mold sample is formed by selective laser melting, the laser power is 270W, the scanning speed is 1000mm / s, the thickness of the powder layer is 40μm, and the scanning distance is 100μm; the working atmosphere is Ar, and the laser volume ...

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Abstract

The invention discloses a conformal water-cooled injection mold steel part and a preparation method thereof, and relates to the field of laser processing and subsequent processing of conformal water-cooled injection molds. Specifically, the preparation method includes sequentially performing solution treatment, low-temperature pre-aging treatment, and ion nitriding treatment on the mold sample obtained by additive manufacturing using selective laser melting technology. ℃, the aging time is 60~180min, the temperature during ion nitriding treatment is 450~600℃, and the nitriding time is 3~10h. It uses the synergistic heat treatment effect of low temperature pre-aging and ion nitriding to keep the core of the mold sample While improving the strength and toughness of the sample, the ion nitriding rate of the surface layer of the sample is increased, thereby avoiding the heat treatment defects of the laser-processed mold steel part and the matrix, and realizing the preparation of high-quality conformal water-cooled injection mold steel parts.

Description

technical field [0001] The invention relates to the field of laser processing and subsequent processing of a conformal water-cooled injection mold, in particular to a conformal water-cooled injection mold steel part and a preparation method thereof. Background technique [0002] By adding vent holes and cooling channels in the injection mold, the quality and productivity of the product can be effectively improved. In the 1990s, the conformal cooling technology was proposed. The water channel changes according to the shape of the product to achieve uniform cooling, which can significantly reduce the cooling time and improve the quality of the injection mold and the product. [0003] The cooling channels in the early conformal water-cooled injection molds were mainly completed by machining, and the shape and distribution design of the channels were limited by the processing method, so it was difficult to realize the design concept and potential of the conformal water-cooled mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/24B29C33/38B33Y10/00C23C8/38C23F17/00
CPCB22F3/24C23C8/38C23F17/00B33Y10/00B29C33/3842B22F2003/248B22F2003/241
Inventor 洪悦董东东许伟王红莉汪唯李洪郭朝乾林松盛石倩代明江韦春贝唐鹏苏一凡唐春梅
Owner GUANGDONG INST OF NEW MATERIALS