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

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...

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

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