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Method for controlling component and thermal treatment technological process of pre-hardening plastic die steel

A plastic mold steel and process technology, applied in the field of steel material manufacturing, can solve problems affecting the surface quality of plastic products, cracking, quenching deformation, etc.

Inactive Publication Date: 2014-06-25
ZHENGZHOU UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Complicated and high-precision plastic molds undergo heat treatment after cavity processing, which will cause heat treatment defects such as quenching deformation, cracking, and decarburization, which seriously affect the surface quality of plastic products

Method used

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  • Method for controlling component and thermal treatment technological process of pre-hardening plastic die steel
  • Method for controlling component and thermal treatment technological process of pre-hardening plastic die steel
  • Method for controlling component and thermal treatment technological process of pre-hardening plastic die steel

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Embodiment 1

[0080]Embodiment 1: Design an orthogonal test, select the heat treatment process parameters that have a significant impact on performance through the orthogonal test: quenching temperature, cooling method, and tempering temperature, as the input of the artificial neural network (different mold steels that have a significant impact on performance The heat treatment process parameters are different, and the quenching temperature, cooling method and tempering temperature are selected in this embodiment). Table 1 is the input data used for network training; Table 2 is the output data used for network training; Table 3 is the chemical composition of die steel used for network prediction and the heat treatment process parameters used for network prediction; Table 4 is the performance and parameters of network prediction. actual performance. It can be seen from Table 4 that the predicted performance is in good agreement with the actual performance. BP network and GRNN network can be ...

Embodiment 2

[0091] Embodiment 2: Orthogonal experiment is designed, and heat treatment process parameters with significant influence are selected through the orthogonal experiment: quenching temperature and cooling method, first tempering temperature, and second tempering temperature, as the input of the artificial neural network. Table 5 is the input data used for network training; Table 6 is the output data used for network training; Table 7 is the chemical composition of steel used for network prediction and the heat treatment process parameters used for network prediction; Table 8 is the performance and actual performance of network prediction performance. Figure 4 It is the contour map of the hardness of the 1050°C quenched die steel, and other performance indicators of the 1050°C quenched die steel can be drawn as a contour map. It can be seen from Table 8 that the predicted performance is in good agreement with the actual performance. BP network and GRNN network can be used to stu...

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Abstract

The invention discloses a method for controlling the component and thermal treatment technological process of pre-hardening plastic die steel. The method includes the steps that firstly, an orthogonal test is designed according to structure characteristics and performance requirements of the pre-hardening plastic die steel, and thermal treatment technological parameters which have obvious influences on performance are found out through the test; then chemical components, the thermal treatment technological parameters and performance indexes are collected; an artificial neural network model is built, the model is trained, input of the model is the chemical components and the thermal treatment technological parameters, and output of the model is the performance indexes; the trained artificial neural network model is used for predicting steel performance and studying influence laws of input to output according to the chemical components and the thermal treatment technological parameters. According to the method, the complicated non-linear relationship between the chemical components, the thermal treatment technological parameters and mechanical properties is built, therefore, the component and thermal treatment technological process can be effectively controlled, the pre-hardening plastic die steel with excellent performance can be generated, and the service life of dies can be prolonged.

Description

technical field [0001] The invention relates to the field of iron and steel material manufacturing, in particular to a method for controlling the heat treatment process of pre-hardened plastic mold steel. Background technique [0002] At present, plastic products are widely used in various fields of the national economy, and are constantly developing in the direction of precision, large-scale and complexity. In plastic processing and molding, plastic molds are used. But at present, in many enterprises in our country, the service life of plastic molds is still relatively low. The main failure modes of the mold are surface wear, deformation and fracture. The vast majority of mold failures are caused by improper heat treatment and improper material selection. Therefore, the optimization of the chemical composition and heat treatment process of plastic mold steel can make it have good mirror finish, suitable hardness, good wear resistance and corrosion resistance, etc. [00...

Claims

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Application Information

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IPC IPC(8): G06N3/02G06F19/00
Inventor 周正悦徐磊
Owner ZHENGZHOU UNIV
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