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Surface treatment method for metal stamping die

A surface treatment and metal stamping technology, applied in heat treatment furnaces, heat treatment equipment, metal material coating processes, etc., can solve the problems of short service life of molds, laborious maintenance, neglecting the importance of surface treatment, etc., to improve service performance and life. , the effect of improving thermal fatigue life and thermal wear resistance

Inactive Publication Date: 2018-04-20
蚌埠市宏大制药机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In modern industry, metal stamping dies are an important condition for industrial development. The production of products often depends on mold processing. As an important tool for casting production, the working performance of molds affects the use and quality of castings. Now Some stamping die processing technology adopts the optimal technical solution in terms of structural materials, but ignores the importance of surface treatment, which leads to the problem that the existing die has a short service life and laborious maintenance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for surface treatment of a metal stamping die, comprising the following steps:

[0017] (1) After heating the stamping die to 500°C, immediately immerse it in a mixed penetrating liquid at a temperature of 50°C, the content of iron boride in the mixed penetrating liquid is 0.15 g / kg, and the content of silicon nitride is 0.20 g / kg, The concentration of sodium chloride is 0.5 g / kg, and the soaking time is 30 minutes. During the soaking process, a vibrator is used to continuously vibrate and mix the permeate;

[0018] (2) Take out the mold after infiltration treatment, dry it at 70°C, put it into a heating furnace and heat it to 450°C, and keep it warm for 3 hours. After heat preservation, the mold has been tempered twice at low temperature. In 5 seconds, the temperature of the billet is rapidly lowered to 300°C, and then transferred to a low-temperature box-type heating furnace. The temperature in the box is set to 260°C, and it is removed after 1 minute of stag...

Embodiment 2

[0024] A method for surface treatment of a metal stamping die, comprising the following steps:

[0025] (1) After heating the stamping die to 550°C, immediately immerse it in a mixed penetrating liquid at a temperature of 55°C, the content of iron boride in the mixed penetrating liquid is 0.18 g / kg, and the content of silicon nitride is 0.25 g / kg, The concentration of sodium chloride is 0.6 g / kg, and the soaking time is 35 minutes. During the soaking process, a vibrator is used to continuously vibrate and mix the permeate;

[0026] (2) Take out the mold after infiltration treatment, dry it at 80°C, put it into a heating furnace and heat it to 500°C, and keep it warm for 3.5 hours. The mold after heat preservation has been tempered twice at low temperature. In 8 seconds, the temperature of the billet is rapidly reduced to 320°C, and then transferred to a low-temperature box-type heating furnace. The temperature in the box is set to 270°C, and it is removed after 2 minutes of st...

Embodiment 3

[0032] A method for surface treatment of a metal stamping die, comprising the following steps:

[0033] (1) After heating the stamping die to 600°C, immediately immerse it in a mixed penetrating liquid at a temperature of 60°C, the content of iron boride in the mixed penetrating liquid is 0.20 g / kg, and the content of silicon nitride is 0.30 g / kg, The concentration of sodium chloride is 0.8 g / kg, and the soaking time is 40 minutes. During the soaking process, a vibrator is used to continuously vibrate and mix the permeate;

[0034] (2) Take out the mold after permeation treatment, dry it at 90°C, put it into a heating furnace and heat it to 550°C, and keep it warm for 4 hours. After heat preservation, the mold has been tempered twice at low temperature. In 10 seconds, the temperature of the billet is rapidly lowered to 350°C, and then transferred to a low-temperature box-type heating furnace. The temperature in the box is set to 280°C, and it is removed after 3 minutes of stag...

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Abstract

The invention relates to the technical field of surface treatment of stamping dies, and discloses a surface treatment method for a metal stamping die. According to the surface treatment method, permeation treatment is carried out, penetrating fluid contains iron boride and silicon nitride, and therefore the thermal fatigue life of the die can be remarkably prolonged, and the thermal wear resistance of the die can be remarkably improved; and then heat treatment and surface strengthening treatment are carried out, different surface treatment modes are used for the die, and therefore the technical advantages of various surface treatment modes can be brought into play, and in addition, the obvious effects of the combined use can be achieved. The method has the advantages that the surface morphology, the chemical components, the structure and the stress state of the die are changed through a composite treatment technology, and therefore the operational performance of the die can be improved, and the service life of the die can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of stamping dies, and in particular relates to a surface treatment method of metal stamping dies. Background technique [0002] Stamping die is a special process equipment for processing materials (metal or non-metal) into parts (or semi-finished products) in cold stamping processing, called cold stamping die (commonly known as cold stamping die). Stamping is a pressure processing method that uses a mold installed on a press to apply pressure to the material at room temperature to cause separation or plastic deformation to obtain the required parts. In the stamping die, various metal materials and non-metal materials are used, mainly carbon steel, alloy steel, cast iron, cast steel, hard alloy, low melting point alloy, zinc-based alloy, aluminum bronze, synthetic resin, polyurethane Rubber, plastic, laminated birch boards, etc. The material for making molds requires properties such as ...

Claims

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Application Information

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IPC IPC(8): C23C12/02C21D9/00C23F1/28
CPCC23C12/02C21D9/0068C23F1/28
Inventor 张莉
Owner 蚌埠市宏大制药机械有限公司
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