Understand normalizing, annealing, quenching and tempering-1

The microstructure obtained by high-temperature tempering is tempered sorbite. The main purpose of tempering is to eliminate quenching stress and get the required structure. According to the different tempering temperature, tempering can be divided into a low temperature, medium temperature, and high temperature. Tempered Martensite, troostite, and sorbite were obtained.

Study of the Hardening-toughening Heat Treatment Process of High Chrome Cast Iron Grinding Balls (2)

3.The graded austenitizing isothermal quenching process 3.1 Effect of grade austenitizing austempering on mechanical properties of Grinding Ball After the ball was austenitized at 980 °C for 150 min + 920 °C for 30 Min, and then put into a salt bath furnace at 260 °C for 30 min and 50 Min, the hardness and […]

Study of the Hardening-toughening Heat Treatment Process of High Chrome Cast Iron Grinding Balls (1)

Abstract: The influence of quenching-tempering heat treatment, conventional austempering heat treatment and multi-stage austenitizing austempering heat treatment on the microstructure and property of high chrome cast iron grinding balls were comparatively investigated. The results show that the impact toughness and impact fatigue resistance of the grinding balls are higher after austempering. The austempering heat treatment […]

Heat treatment process of the high chrome cast iron Grinding Media

Guo Zhi-hong, Wei Ying-hui, Wang Hong-wei (Taiyuan University of Technology, materials science, Taiyuan, Shanxi) ABSTRACT: A heat treatment process of high chromium cast iron grinding media with trace alloying elements Mo, V, NB was studied. The heat treatment processes of quenching at 980 °C, tempering at 400 °C and 600 °C was adopted. The microstructure […]

grinding media heat treatment

Basic principle and properties of grinding media surface heat treatment

1. Induction Heating Surface quenching definition: is the use of a certain method to produce a certain frequency of induction current on the surface of the workpiece, the surface of the parts quickly heated, and then quickly quenching cooling heat treatment operation. PRINCIPLE: As shown in the figure, electromagnetic induction produces an induced current of […]

quenching and tempering process

Defects of quenching & tempering and Prevention

In the heat treatment process, the reject rate caused by the quenching process is usually higher. This is mainly in the quenching process, and at the same time, the formation of greater thermal stress and structural stress, in addition, it is easy to be exposed in the quenching and tempering process because of the inherent […]

high chrome steel balls producing

Heat treatment process for high chromium grinding ball

Ball mill is widely used in building materials, mineral processing, cement, thermal power generation and fertilizer production of the main grinding equipment, grinding ball is the largest consumption of wear-resistant parts. Therefore, with the continuous development of key industries such as building materials, the demand for grinding balls will increase greatly. At present, ordinary forged […]

Cr26% high chrome casr iron grinding balls

Influence of Heat Treatment on Structure and Properties of Cr26 High Chromium Cast Iron Grinding Ball

Written by LI Ju-cang, ZHAO Ai-min, WANG Li-na (University of Science and Technology Beijing, Beijing 100083, China) Abstract: The effects of heat treatment on the hardness, impact toughness, manufactured process, and microstructure used different heat treatment technology of dia50 mm Cr26 high chromium cast iron grinding ball have been studied. The results show that hardness of […]

Effects of Heat Treatment Process on Microstructure and Properties of High chrome Grinding Ball

Effects of Heat Treatment Process on Microstructure and Properties of High Chromium Grinding Ball

ABSTRACT: The heat treatment process of high chromium grinding ball produced by sand coated iron mould casting process was researched. Shrinkage and porosity defects have not been discovered after cutting along the diameter of grinding ball. The grinding ball in cast state has poor mechanical properties. Mechanical properties of grinding ball significantly increase after heat treatment After heat […]

heat treatment fire

The types of Surface Heat treatment

Chemical Heat Treatment-a heat treatment process in which a metal or alloy is placed in an active medium at a certain temperature so that one or more elements penetrate into its surface to change its chemical composition, structure, and properties. Common Chemical Heat Treatment Process: carburizing, nitriding, carbonitriding, aluminizing, boronizing and so on. The aim […]