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Surface treatment method for automobile manufacturing extrusion die

A technology for extrusion dies and automobile manufacturing. It is used in manufacturing tools, heat treatment furnaces, heat treatment equipment, etc. It can solve the problems of short mold service time, low tensile strength and impact toughness at the core of the mold, and shorten the production cycle. Promotion and use, the effect of improving thermal stability

Inactive Publication Date: 2018-11-23
安徽启慧信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of the low tensile strength and impact toughness of the mold core and the short service life of the mold in the prior art, and propose a surface treatment method for an extrusion mold used in automobile manufacturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment one: a kind of surface treatment method of extrusion die for automobile manufacturing, comprising the following steps:

[0019] S1, cleaning the surface of the extrusion die for automobile manufacturing (the surface cleaning step of the extrusion die for automobile manufacturing is: the extrusion die for automobile manufacturing is cleaned and wiped with 80% ethanol, and then aluminum oxide powder is used to clean the surface of the extrusion die for automobile manufacturing. The surface of the extrusion die is ground and washed, and finally 80% ethanol is used to clean and wipe the extrusion die for automobile manufacturing. After it is naturally air-dried and has no ethanol smell), it is heated to 1300°C for the first time, and it is cleaned with ordinary After the engine oil is rapidly cooled to room temperature, heat the extrusion die for automobile manufacturing for the second time to 750°C for tempering at a high temperature, and keep it warm for 2 hours...

Embodiment 2

[0022] Embodiment two: a kind of surface treatment method of extrusion die for automobile manufacturing, comprising the following steps:

[0023] S1, cleaning the surface of the extrusion die for automobile manufacturing (the surface cleaning step of the extrusion die for automobile manufacturing is: the extrusion die for automobile manufacturing is cleaned and wiped with 80% ethanol, and then aluminum oxide powder is used to clean the surface of the extrusion die for automobile manufacturing. The surface of the extrusion die is ground and washed, and finally 80% ethanol is used to clean and wipe the extrusion die for automobile manufacturing. After it is naturally air-dried and has no ethanol smell), it is heated to 1400°C for the first time, and it is cleaned with ordinary After the engine oil is rapidly cooled to room temperature, heat the extrusion die for automobile manufacturing for the second time to 780°C for high temperature tempering, and keep it warm for 2 hours. Te...

Embodiment 3

[0026] Embodiment three: a kind of surface treatment method of extrusion die for automobile manufacturing, comprising the following steps:

[0027] S1, cleaning the surface of the extrusion die for automobile manufacturing (the surface cleaning step of the extrusion die for automobile manufacturing is: the extrusion die for automobile manufacturing is cleaned and wiped with 80% ethanol, and then aluminum oxide powder is used to clean the surface of the extrusion die for automobile manufacturing. The surface of the extrusion die is ground and washed, and finally 80% ethanol is used to clean and wipe the extrusion die for automobile manufacturing. After it is naturally air-dried and has no ethanol smell), it is heated to 1400°C for the first time, and it is cleaned with ordinary After the engine oil is rapidly cooled to room temperature, heat the extrusion die for automobile manufacturing for the second time to 750°C for tempering at a high temperature, and keep it warm for 2 hou...

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PUM

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Abstract

The invention discloses a surface treatment method for an automobile manufacturing extrusion die. The surface treatment method comprises the following steps: S1, cleaning the surface of the die, heating for the first time, cooling to room temperature, tempering the die twice under high temperature and naturally cooling to room temperature for standby application; S2, putting the die into an ion nitriding furnace, extracting air in the ion nitriding furnace out, introducing nitrogen, then introducing ammonia gas and a carbon source into the ion nitriding furnace so that air pressure in the ionnitriding furnace reaches the second pressure intensity; S3, electrifying the ion nitriding furnace, simultaneously warming a temperature of the ion nitriding furnace and opening the ion nitriding furnace after thermal insulation. According to the surface treatment method disclosed by the invention a twice-tempering method is utilized, so that a production cycle of the automobile manufacturing extrusion die is shortened, production energy is saved, and a microstructure of the automobile manufacturing extrusion die is improved; thus, thermal stability, fracture toughness and high temperature resistance of the automobile manufacturing extrusion die are improved, and large-scale popularization and application of the automobile manufacturing extrusion die are facilitated.

Description

technical field [0001] The invention relates to the technical field of die processing, in particular to a method for surface treatment of an extrusion die for automobile manufacturing. Background technique [0002] The traditional extrusion die surface treatment quenching adopts vacuum high-pressure air cooling for continuous cooling. During quenching and cooling, the temperature difference between the mold surface and the core is large, and the structure difference between the surface and the core after cooling is large. After secondary tempering, the mold surface precipitates The carbide dispersion degree of the mold is high, and the dispersion degree of the carbide precipitated in the mold core is low, so that the mechanical properties of the tensile strength and impact toughness of the mold core are low. The hardness is not high, and in the subsequent surface chemical heat treatment and nitriding, the center of the mold is prone to pulse, herringbone, accumulation, and n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D1/58C21D9/00C23C8/36C23F17/00
CPCC21D1/18C21D1/58C21D9/0068C23C8/36C23F17/00
Inventor 赵文明丁玲玲崔华国
Owner 安徽启慧信息科技有限公司
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