Long-life alloy die-casting module and manufacturing method thereof

A manufacturing method, die-casting mold technology, applied in the direction of manufacturing tools, heat treatment process control, furnace type, etc., can solve the problem of no microstructure refinement, insufficient homogeneity of structure and composition, and poor microstructure spheroidization effect and other problems, to achieve good high temperature tempering stability, segregation improvement, fine microstructure effect

Active Publication Date: 2007-12-05
宝武特种冶金有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, this manufacturing process has the following problems: 1) The heating step is unreasonable, mainly because the time control is too short, resulting in insufficient uniformity of the structure and composition; 2) This annealing process is a typical stress-relief annealing process, and the microstructure is not Any refinement is mainly to reduce the hardness of the product, and the effect on the spheroidization of the microstructure is not good, and the result is coarse grains
The above two deficiencies lead to a short life of the module, with a service life of about 20,000-40,000 modules

Method used

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  • Long-life alloy die-casting module and manufacturing method thereof
  • Long-life alloy die-casting module and manufacturing method thereof
  • Long-life alloy die-casting module and manufacturing method thereof

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Embodiment 1

[0045] The weight percentage of the chemical composition of the module is: C 0.41wt%, Si 1.21wt%, Mn 0.50wt%, Cr 5.25wt%, V 1.10wt%, Mo 1.30wt%, S 0.0008wt%, P 0.010wt%, the rest is Fe and unavoidable impurities;

[0046] The electroslag ingot was kept in a heating furnace at a temperature of 1260°C for 19 hours for homogenization treatment. The photo of the metallographic structure after the homogenization treatment is shown in Figure 1;

[0047] The electroslag ingot has undergone two upsetting and elongating treatments. The opening forging temperature is 1245°C and the final forging temperature is 890°C.

[0048] The microstructure treatment of the module is air-cooled to room temperature at a solid solution temperature of 1090°C, and then undergoes two high-temperature tempering treatments at 860°C and 720°C. The process curve of the microstructure treatment is shown in Figure 2. The photo of the structure is shown in Figure 3, and the photo of the spheroidized structure ...

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Abstract

The present invention provides one kind of long service life module for aluminum alloy pressure casting die. The material for the module has the components including C 0.37-0.45 wt%, Si 0.90-1.40 wt%, Mn 0.30-0.60 wt%, Cr 5.10-5.70 wt%, V 1.00-1.40 wt%, Mo 1.20-1.50 wt%, S 0.0005-0.003 wt%, P 0.001-0.015 wt%, and Fe and inevitable impurities for the rest. The module is produced through the following steps: homogenizing electroslag ingot in a heating furnace at 1230-1290 deg.c for 15-20 hr, twice upsetting and stretching in the initial forging temperature of 1230-1250 deg.c and final forging temperature of 850-900 deg.c, and structure fining treatment of the hot forging in an annealing furnace at 860-950 deg.c. The module has over 3.5 times longer service life compared with that of available technology.

Description

technical field [0001] The invention relates to a hot work mold steel module and a metallurgical manufacturing method thereof, in particular to a long-life aluminum alloy die-casting mold module used in the mold manufacturing industry and a manufacturing method thereof. Background technique [0002] Hot work die steel modules are special die steel modules, which can be divided into die-casting die modules and forging die modules according to their uses, both of which are raw materials for manufacturing hot work dies. Aluminum alloy die-casting mold module is the most commonly used type of die-casting mold module, which is used to manufacture die-casting molds for aluminum alloy products. The aluminum alloy die-casting mold modules currently used in my country use traditional metallurgical techniques to imitate the high-tungsten and low-carbon modules introduced by the former Soviet Union. The chemical composition ratio of these modules is unreasonable, using C0.30-0.40wt%, S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/24C21D9/70B21J1/06C21D8/00C21D11/00C21D1/26
Inventor 续维胡俊辉徐明华王庆亮张宏奎
Owner 宝武特种冶金有限公司
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