High strength wear-resistant steel plate heat treatment
High-strength wear-resistant steel is generally alloy steel, representing steel numbers :JFE-EH400, JFE-EH450, JFE-EH500, DILLIDUR 400V, DILLIDUR 450V, DILLIDUR 500V, JFE-EH550 and so on.
Most of the above wear-resistant steel plates are imported wear-resistant steel plates, there are a large number of eutectic carbides in the organization, a large number of eutectic carbides exist after vacuum quenching, high wear resistance, large bearing capacity, often used to manufacture wear-resistant parts working under high wear resistance conditions.
The correct selection of heat treatment of high strength wear-resistant steel is the key in the manufacture of bearing bush. Vacuum low quenching and low return process and heat treatment distortion statistics have been made for the bearing bushing working in the polyvinyl alcohol (PVA) slurry. In this paper, the bearing bushing is working in the PET slurry, the service temperature is high, about 350℃, higher than the service temperature of the PVA slurry (about 100℃), and the high quenching and high return heat treatment process is proposed for the bearing bushing.
The processing procedure of the bearing is blanking → forging → nodular annealing → machining → vacuum quenching and tempering → grinding. The microstructure, hardness and heat treatment distortion of the bearing bush after spherodizing annealing and high quenching and high return were observed and measured in this experiment, so as to provide reference for the process adjustment of this kind of material and the dimensional processing allowance before quenching.
At present, the heat treatment of JFE wear-resistant steel plate accounts for more than 50% of the cold work die processing capacity, and mastering the different heat treatment processes, microstructure characteristics and distortion laws of this kind of material has positive guiding significance for the manufacture of scientific research and production of industrial die.
High wear-resistant steel bearing is a bearing part used in chemical, machinery and other industries, which works under specific pressure, temperature and medium. The operating conditions are harsh, the manufacturing process is complex, and the high wear-resistant steel for the manufacturing of the bearing shell must maintain a high hardness under certain temperature conditions, but also must have wear resistance, corrosion resistance, oxidation resistance, good dimensional stability and better processing performance.
