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Heat treatment process used for Cr12MoV steel casting die surface

A technology for casting molds and mold profiles, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of high cost and large surface hardness, achieve small surface deformation, reduce tool wear costs, and have Environmentally friendly effects

Active Publication Date: 2017-07-28
芜湖创挚汽车科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively large surface hardness after quenching, the machining tool wear is more obvious, and the cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A heat treatment process for Cr12MoV steel casting mold surface, comprising the following steps:

[0040] S1. Sample preparation: Polish the surface of the sample with sandpaper to remove the oxide layer and stains, and use alcohol to clean the surface to make the mold obtain a smooth and clean surface;

[0041] S2. Pretreatment: apply light-absorbing paint solution on the mold surface, wait for the diluent to volatilize, and the thickness of the coating after the diluent volatilizes is 0.5mm;

[0042] The light-absorbing coating can be any light-absorbing coating used for laser heat treatment purchased on the market. In this embodiment, the mass fraction of the light-absorbing coating is 15% to 20% of brown corundum and 15% to 18% of quartz sand; 25%-32% phenolic resin, 30%-35% industrial alcohol, 4%-8% rare earth oxide, 3%-6% anti-sedimentation agent;

[0043] S3, mold treatment: forging and spheroidizing the mold;

[0044] S4. Preparation base:

[0045] 1. Model t...

Embodiment 2

[0053] The difference between the second embodiment and the third embodiment lies in: the method for preparing the base is different.

[0054] 1. Model the base in catia, open a groove on the upper end of the base for assembling the mold, the depth of the groove is smaller than the height of the mold, and then assemble the base and the mold so that the mold is embedded in the groove, and the base and the mold are combined to form to be lasered;

[0055] 2. Set the base material. The thermal conductivity of the base material is better than that of the mold material. Put the 3D model into ansys, input the base material and mold material, do thermal field analysis, and modify the base structure according to the analysis results. The self-cooling capacity is adjusted to be equal;

[0056] 3. Make the base according to the 3D model.

Embodiment 3

[0058] The difference between the third embodiment and the first embodiment lies in that the method for preparing the base is different.

[0059] 1. Model the base in catia, the lower end of the mold can be stably placed on the upper end of the base, and a cooling cavity is set up on the lower end of the base vertically upwards. Several cooling cavities are evenly distributed on the base, and then the three-dimensional model The base and the mold are assembled together to form the part to be lasered;

[0060] 2. Set the coolant material, the material of the base is consistent with the mold material, put the 3D model into ansys, input the base material, coolant material and mold material, do thermal field analysis, and determine the cooling required in the cooling cavity according to the analysis results Liquid volume, adjust the self-cooling capacity of each part of the laser to be equal;

[0061] 3. Make the base according to the three-dimensional model. The material of the ...

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Abstract

The invention discloses a heat treatment process used for a Cr12MoV steel casting die surface. The heat treatment process comprises the following steps: preparing a sample; preparing a preparing a base used for balancing the self-cooling capacity of the die at all parts, wherein the upper end surface of the base is clung to the end surface of one side, back on to the die surface, of the die, and the base and the die form a part to be subjected to laser processing with an equal self-cooling capacity at all parts; performing laser quenching; performing 510 DEG C high-temperature tempering on the die for three times. According to the heat treatment process used for the Cr12MoV steel casting die surface, the steel material of the die surface is quickly heated by utilizing a focused laser beam, so that the steel material can generate phase deformation to form a martensite hardening layer, and the hardness requirement of the casting die surface is met.

Description

technical field [0001] The invention relates to a heat treatment process, in particular to a heat treatment process for the surface of a Cr12MoV steel casting mold. Background technique [0002] In recent years, with the development of the automobile industry, the competition in the automobile market has become increasingly fierce. Focusing on the efficient production, low cost and safety of automobile bodies, the update and replacement frequency of various models is higher than ever before. The demand for molds in the automobile industry The quantity has also shown an unprecedented rapid growth; but at the same time, higher requirements have been put forward for the quality of the mold. [0003] At present, in order to improve the surface hardness and service life of the mold, heat treatment is generally performed on the surface of the mold. The traditional heat treatment process uses tools such as an oxyacetylene spray gun to heat the working part of the mold with flame, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/09C21D9/00
CPCC21D1/09C21D9/0068
Inventor 陈利丰陈挚金牛
Owner 芜湖创挚汽车科技有限公司
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