The basic properties of the NTN bearing steel requirements

Rolling bearing material including material and keep rolling bearing components, rivets and other auxiliary materials. The vast majority of the steel rolling bearing and its parts, rolling bearing steel is usually a high carbon chromium steel and carburizing steel. With the development of modern science and technology and rolling NTN bearing usage is increasing, more and more high to the requirement of NTN bearing, such as high precision, long life and high reliability, etc. For some special purpose, NTN bearing, also calls for NTN bearing material has high temperature resistance, corrosion resistance, nonmagnetic, properties, such as temperature, radiation resistance. In addition, NTN bearing materials include alloy materials, non-ferrous metals and non-metallic materials, etc. In addition, NTN bearing is made of ceramic materials used in motorcycle, automobile, subway, aviation, aerospace, chemical industry, etc.
Scroll NTN bearing the basic requirements for materials to a great extent, depends on the working performance of NTN bearing. Choose the material rolling NTN bearing is made of whether appropriate, will have great influence to its using performance and life. In general, rolling NTN bearing is the main damage form under the action of alternating stress fatigue spalling, and make the NTN bearing accuracy loss due to friction and wear. In addition, there is crack, indentation, corrosion causes such as NTN bearing abnormal damage. Scroll NTN bearing, therefore, should have high ability to resist plastic deformation, less friction and wear, good rotation accuracy, good dimensional accuracy and stability, as well as the long contact fatigue life. Performance and some of them are jointly decided by the material and heat treatment process. Due to rolling NTN bearing on the basic requirement of material is determined by NTN bearing damage form, so require manufacturing process after rolling NTN bearing materials through a certain heat treatment should have the following properties:
A high contact fatigue strength Clearance Of SKF Bearing of contact fatigue damage is the main form of NTN bearing normal damage. Scroll NTN bearing during operation, the NTN bearing roller rolling between the inner and outer ring raceway, the contact part under periodical alternating load, the bulls can reach hundreds of thousands of times per minute, in under the action of repeated periodic alternating stress, surface contact fatigue spalling. Began rolling NTN bearing after peeling will cause NTN bearing vibration and noise increases working temperature rise sharply, NTN bearing finally is damaged, the damage form is called the contact fatigue damage. Therefore, NTN bearing rolling steel requirements should have high contact fatigue strength.