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Metal mold surface treatment process

A metal mold and surface treatment technology, which is applied in the direction of metal material coating process, superimposed layer plating, solid-state diffusion coating, etc., can solve the problem of metal mold toughness, insufficient wear resistance, poor corrosion resistance, and reduce the use of molds Life and other issues, to improve performance such as corrosion resistance and cold and heat fatigue resistance, improve wear resistance and corrosion resistance, and improve wear resistance

Pending Publication Date: 2022-07-29
西安致远航空科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the H13 mold is applied at a higher temperature and bears a greater impact force, and the surface is easily oxidized during work. At the same time, it is also subjected to repeated heating and cooling, which is prone to fatigue cracks and reduces the service life of the mold.
At present, nitriding treatment is generally used to strengthen the surface of the mold, but the nitriding treatment will produce a white layer, and the toughness of the ε brittle hard phase is poor.
The resulting metal mold not only has relatively insufficient toughness and wear resistance; it also has defects such as poor corrosion resistance and poor cold and heat fatigue resistance, which affects the service life of the metal mold

Method used

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  • Metal mold surface treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A metal mold surface treatment process, comprising the following steps:

[0046] Step 1, the preparation of molybdenum sulfide coating;

[0047] S1. Roughen the metal mold made of 4Cr5MoSiV1 so that the surface roughness Ra is 0.8 μm, then clean the metal mold with cleaning solution and absolute ethanol respectively. After cleaning, take out the metal mold and use hot air to clean the metal mold. its blow dry;

[0048] S2. The dried metal mold is placed in the ion chemical heat treatment furnace, the pure molybdenum plate and the metal mold are placed on the two cathodes in turn, the pure molybdenum plate is used as the source electrode for providing molybdenum atoms, and the metal mold is placed on the other cathode. ; Then clean the furnace cavity and pump the pressure in the furnace to 1.0-3.0Pa, then fill in an appropriate amount of inert gas, and then adjust the voltage on the source electrode and the metal mold to an appropriate value; after the adjustment is com...

Embodiment 2

[0075] Compared with Embodiment 1, the difference between this embodiment is as follows:

[0076] In the glow discharge process of step S2, the source voltage is 500V, the working voltage is -500V, the electrode spacing is 30mm, the argon gas pressure is 40Pa, the temperature is 1000°C, and the constant temperature time is 6h.

[0077] In step S3, the mixed gas is formed by mixing carbon disulfide vapor and argon according to a volume ratio of 2:1, and the flow rate of the mixed gas is 0.1 L / min.

[0078] In step S3, the time of infiltration treatment is set to 100min, and the current is set to 1.6A.

[0079] During the deposition of the chromium nitride coating, the argon pressure was 0.4Pa, the deposition bias was 25V, the deposition pressure was 2.3Pa, the deposition temperature was 460°C, and the deposition time was 80min.

[0080] During the deposition of titanium nitride coating, the argon pressure was 0.3Pa, the deposition bias was 100V, the deposition pressure was 5Pa...

Embodiment 3

[0085]Compared with Embodiment 1, the difference between this embodiment is as follows:

[0086] In the glow discharge process of step S2, the source voltage is 1200V, the working voltage is -900V, the electrode spacing is 60mm, the argon gas pressure is 60Pa, the temperature is 1200°C, and the constant temperature time is 8h.

[0087] In step S3, the mixed gas is formed by mixing carbon disulfide vapor and argon according to a volume ratio of 2.5:1, and the flow rate of the mixed gas is 0.12 L / min.

[0088] In step S3, the time of infiltration treatment is set to 130min, and the current is set to 1.8A.

[0089] During the deposition of the chromium nitride coating, the argon pressure was 0.5Pa, the deposition bias was 30V, the deposition pressure was 2.5Pa, the deposition temperature was 480°C, and the deposition time was 110min.

[0090] During the deposition of the titanium nitride coating, the argon pressure was 0.4Pa, the deposition bias was 300V, the deposition pressure...

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Abstract

The invention relates to the technical field of metal surface strengthening modification, in particular to a metal mold surface treatment process. The method comprises the following steps: placing a cleaned metal mold in an ion chemical heat treatment furnace, and carrying out molybdenum infiltration treatment on the surface of the metal mold by adopting a glow discharge process; in the molybdenum infiltration process, bombarded particles are accelerated under the action of electric field force when passing through an accelerating electric field, so that the particles can impact the surface of the metal mold with larger impact force, and the molybdenum infiltration depth is increased; the mixed gas permeates into the surface layer of the metal mold under a high-temperature condition, and a thicker and more compact molybdenum sulfide coating is formed on the surface of the mold, so that the wear resistance of the mold is effectively improved; under the synergistic cooperation of the molybdenum sulfide coating, the chromium nitride coating, the titanium nitride coating and the protective coating, the wear resistance, corrosion resistance and fatigue resistance of the treated metal mold are greatly improved, the service life of the mold is prolonged, and the grade of the metal mold is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of metal surface strengthening and modification, in particular to a metal mold surface treatment process. Background technique [0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. In a nutshell, a mold is a tool used to make a shaped item, this tool is made up of various parts, and different molds are made up of different parts. It mainly realizes the processing of the shape of the object through the change of the physical state of the formed material, and is known as the "mother of industry". [0003] The H13 mold is applied at a higher temperature, bears a large impact force, and the surface is easily oxidized during operation, and it is also subjected to repeated heating and cooling, which is prone to fatigue cracks and reduces the service life of...

Claims

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Application Information

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IPC IPC(8): C23C12/00C23C14/06C23C14/32C23C28/04
CPCC23C12/00C23C14/325C23C14/0641C23C28/04
Inventor 申新华刘晔党建坤姚斌曲薇
Owner 西安致远航空科技有限公司
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