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Method for manufacturing die for casting

A technology of mold and hot work die steel, applied in vacuum evaporation coating, coating, sputtering coating and other directions, can solve the problem of insufficient bonding force between film and substrate

Active Publication Date: 2012-05-16
惠州臻富机械电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem of insufficient bonding between the existing film layer and the substrate

Method used

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  • Method for manufacturing die for casting

Examples

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Embodiment 1

[0031] This embodiment is used to illustrate the mold preparation method provided by the present invention.

[0032] The die-cast die core of the thin-walled parts of the magnesium alloy mobile phone shell was prepared from commercially available hot work die steel model Dievar, and the die core was soaked in a degreasing agent for 3 minutes. The degreasing agent was Ridoline 53S, and the temperature was controlled at 40°C. . Then ultrasonically clean it in pure water for 4 minutes, put it into a vacuum degassing box for degassing and drying, heat to 110°C, vacuumize to 10Pa, and degass for 30 minutes.

[0033] PVD vacuum ion coating equipment is used, and TiB is placed on the top of the vacuum chamber 2 The middle part below the vacuum chamber is a rotatable workbench for placing workpieces. The working gas is argon with a purity of 99.99%, and the reaction gas is nitrogen with a purity of 99.99%. Open the working door of the vacuum chamber of the ion coating machine, plac...

Embodiment 2

[0038]This embodiment is used to illustrate the mold preparation method provided by the present invention.

[0039] The difference from Example 1 is that the degassing drying conditions are 200° C., vacuumed to 5 Pa, and the degassing time is 60 minutes. Obtain mold core A2.

Embodiment 3

[0041] This embodiment is used to illustrate the mold preparation method provided by the present invention.

[0042] The difference from Example 1 is that it does not contain a discharge cleaning step. Obtain mold core A3.

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Abstract

The invention discloses a method for manufacturing a die for casting, comprising the step of forming at least one TiBN layer on the surface of hot die steel after pretreatment by PVD (physical vapor deposition), wherein the pretreatment comprises degreasing and cleaning in order, and degassing and drying are carried out in a vacuum degassing box after cleaning, the degassing and drying is carried out at 100-200 DEG C, the vacuum degassing box is vacuumized at 5-10 Pa, and the degassing time is 30-60 minutes. The bonding force between the obtained coating and a base material is greatly improved, and die surface erosion is retarded, thereby improving the product surface quality and die service life.

Description

【Technical field】 [0001] The invention relates to a method for preparing a mold for die casting. 【Background technique】 [0002] With the continuous development of technology, metal die-casting molds have been widely used in industrial production. As a newly developed communication product, mobile phones are also manufactured using metal die-casting molds in large numbers. Generally speaking, die casting molds work at higher working temperatures. When working, the molten metal needs to be injected into the cavity of the mold at high pressure and high speed, which will inevitably have a severe impact and wash on the surface of the mold cavity, and the mold will be corroded and worn over time. . [0003] For example, the temperature of the magnesium alloy solution is as high as 630-650 degrees Celsius. Under the high-speed impact of the high-temperature metal flow, the magnesium alloy die-casting mold will have granular or regional erosion on the surface of the cavity, which...

Claims

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Application Information

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IPC IPC(8): C23C14/06C23C14/35B22D17/22
Inventor 杨春花
Owner 惠州臻富机械电子科技有限公司
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