High Wear-Resistant Cold Work Die Steel Heat Treatment Process

High wear-resistant cold work die steel is generally high carbon high chromium steel, representative steel grades are: Cr12, Cr12MoV, Cr12Mo1V1, Cr12W, Cr12V, LD (7Cr7Mo2V2Si), ER5 (Cr8MoWV3Si), GM (9Cr6-W3Mo2V2) and so on.

Most of the above steels are ledeburite steels. There are a large number of eutectic carbides in the structure. There are a large number of eutectic carbides after vacuum quenching. The wear resistance is high and the bearing capacity is large. It is often used for manufacturing under high wear resistance conditions. Die for cold working of work.

The correct selection of the heat treatment of the material is the key to the manufacture of the bearing. I have done the vacuum low-quenching and low-return process and heat treatment distortion statistics for the bearing bush working in the polyvinyl alcohol (PVA) slurry. In this article, the bearing bush is working in the polyester (PET) slurry, and the use temperature is higher, at 350 ℃ About, higher than the use temperature of PVA slurry (about 100℃), the bearing is planned to adopt high quenching and high heat treatment process.

The processing procedures of the bearing bush are blanking→forging→spheroidizing annealing→machining→vacuum quenching and tempering→grinding, etc. This experiment observes and tests the microstructure, hardness and heat treatment distortion of the bearing bush after the spheroidizing annealing and high quenching and high recovery process, so as to provide future process adjustments for this type of material and the size processing allowance before quenching. reference.

At present, the heat treatment of Cr12 materials accounts for more than 50% of the processing capacity of cold work molds. Mastering the different heat treatment processes, microstructure characteristics and distortion laws of these materials has positive guiding significance for the manufacture of molds in scientific research and production.

Cr12MoV steel bearing bush is a kind of bearing part used in chemical, machinery and other industries. It works under specific pressure, temperature and medium. The operating conditions are harsh and the manufacturing process is complex. In addition to maintaining high hardness under certain temperature conditions, the Cr12MoV steel for the manufacture of bearing bushes must also have wear resistance, corrosion resistance, oxidation resistance, good dimensional stability and good quilting. Processing performance, etc.

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By Minghe Die Casting Manufacturer |Categories: Helpful Articles |Material Tags: Aluminum Casting, Zinc Casting, Magnesium Casting, Titanium Casting, Stainless Steel Casting, Brass Casting,Bronze Casting,Casting Video,Company History,Aluminum Die Casting |Comments Off