Hot-pressed elbow is a elbow that is made by the hot pressing process.Hot-pressed elbow is processed with professional equipment after that pipe heating , then cut it and heat it to above the critical temperature , We put it into the hardening agent quickly after thermal insulation for a period of time, To make its temperature to reduce suddenly .It is made with rapid cooling method . The heat treatment method of hot-pressed elbow has two kinds, one kind is are hot processing, one kind is quenching treatment.