Heat treatment method of granulation ring mold

Abstract

The invention relates to a heat treatment method of a granulation ring mold, which has the characteristics that the granulation ring mold is made of 45 steel; the heat treatment method comprises preheat treatment and final heat treatment, wherein the preheat treatment and the final heat treatment both comprise a quenching step and a tempering step; carbon constructional quality steel is selected as the material of the ring mold, and is ordinary and cheap; an optimized subcritical quenching heat treatment process is adopted for enhancing abrasion resistant performance of the ring mold; treated metallurgical structure is a composite phase of tempered martensite and retained austenite; the optimal combination of hardness and toughness is found; and the abrasion resistant performance of the material reaches a optimal level. The ring mold has high comprehensive mechanical performance and high anti-abrasion capability of abrasive materials, and can replace expensive alloy steel and stainless steel materials for finishing granulation procedures.

Description

Technical field: [0001] The invention relates to a heat treatment method of a granulation ring die. Background technique: [0002] At present, the structure of the ring die on the granulator is relatively mature, but its wear is a difficult technology for the ring die to solve. Most of the existing granulation ring dies are made of high-quality alloy steel and high-chromium stainless steel. The materials are expensive and the manufacturing cost is high, which greatly increases the cost of granulation products. Ordinary metal materials are difficult to resist the abrasive wear on the ring die during the granulation process. The service life is short; the ring dies produced by many manufacturers have not solved this practical problem well. Invention content: [0003] The purpose of the present invention is to avoid the deficiencies of the prior art and provide a granulation ring die heat treatment method. Therefore, the problems existing in the prior art are effectively so...

AI Technical Summary

Problems solved by technology

[0002] At present, the structure of the ring die on the granulator is relatively mature, but its wear is a technology that is difficult to solve for the ring die

Most of the existing granulation ring dies are made of high-quality alloy steel and high-chromium stainless steel. The materials are expensive and the manufacturing cost is high, which greatly increases the cost of granulation products. Ordinary metal materials are difficult to resist the abrasive wear on the ring die during the granulation process. The service life is short; the ring dies produced by many manufacturers have not solved this practical problem well