Die surface intensifying process

Abstract

The method includes steps: (1) carrying out operation of eliminating stress for finished dies; (2) carrying out procedure of sand blasting by using ceramics sand; (3) processing operation of beads striking: successional striking surface of die by pellet type granules made from metal or glass in high speed. The said processes has the advantages of more rigid surface, increasing compressive stress, reducing crazing and other defects so as to raise performance of antifatigue of the die.

Description

technical field [0001] The invention relates to a mold surface treatment method, in particular to a mold surface strengthening treatment method capable of improving the surface structural properties of mold materials. Background technique [0002] Die-casting and forging molds often form defects or residual tensile stress on the surface of the mold after processing or production for a period of time. These surface defects or residual stress often cause the source of mold damage and reduce the service life of the mold. Furthermore, the thermal cracking and thermal erosion of the mold after a short period of use are the most troublesome quality problems for the mold industry, which also leads to a sharp increase in maintenance costs and manufacturing costs. Most of the machining processes, including electric discharge machining, wire cutting machining and surface nitriding treatment, will form a hardened white layer on the surface of the mold, resulting in embrittlement of the...

AI Technical Summary

Problems solved by technology

[0002] Die-casting and forging molds often form defects or residual tensile stress on the surface of the mold after processing or production for a period of time. This surface defect or residual stress often causes the root cause of mold damage and reduces the service life of the mold

Furthermore, thermal cracks and thermal erosion caused by molds after a short period of use are the most troublesome quality problems for mold manufacturers, which also cause maintenance costs and manufacturing costs to increase sharply.

Most of the machining processes, including electric discharge machining, wire cutting machining and surface nitriding treatment, will form a hardened white layer on the surface of the mold, resulting in embrittlement of the mold surface and reducing the production life of the mold.

Therefore, how to solve the shortcomings of the surface hardness of the aforementioned die-casting and forging dies, and further strengthen the surface structure of the dies, so as to reduce the maintenance costs and extend the service life of the dies, is the key direction that the industry should strive to develop and break through.

[0003] Therefore, the present invention proposes a mold surface strengthening treatment method for the above-mentioned problems to improve the shortcomings of the traditional mold surface that is easy to wear

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