High temperature bearing failure mechanism

The failure mechanism of high temperature bearing 1. - high temperature bearing failure mechanism Contact fatigue failure of contact fatigue failure refers to the high temperature bearing on work, and not under the effect of alternating stress and failure surface. Contact fatigue spalling occurs in a high temperature bearing enterprise work surface, often accompanied by fatigue crack, from our first contact with the material surface under the big produce alternating shear stress, and can be extended to the surface formed between their different flake shape, such as dot to pitting corrosion or pitting spalling, peel into small sheet according to the shallow flaking. Often due to spalling gradually become to expand the development, to expand the deep, forming a deep spalling. 2. Failure mechanism of high temperature bearing ー ー wear failure wear failure refers to the relative sliding friction surface between the enterprise and lead to the working surface of metal structure to improve the wear failure. Continuous wear will cause high temperature bearing parts damage began to emerge, and eventually lead to high temperature bearing size accuracy loss and other countries related research questions. Wear may directly affect the shape changes, fit clearance enlarged and work with surface morphology change, are likely to affect the lubricant or to the environment pollution we caused a certain degree of development is the lubrication system function to realize complete loss, so that loss of high temperature bearing rotating accuracy can not meet the normal operation and society. Wear failure is one of the common method of failure modes of all kinds of high temperature bearing, according to the wear form is usually can be divided into common of abrasive wear and adhesive wear. 3. Failure mechanism - — High temperature bearing failure of high temperature bearing failure is mainly caused by the defects and overload two factors. As outside more than material strength limit, resulting in parts fault, called overload fracture. Overload is the main reason of the host fault suddenly or improper installation. High temperature bearing parts of the micro cracks, shrinkage cavity, bubble, some big foreign body, structure and local overheating burns and other defects, and when the impact overload or violent vibration, also can cause fracture in defect, known as defect fracture. Pointed out that in the manufacturing process of high temperature bearing, the future must also strengthen the quality control of raw material, forging and heat treatment, and instrument control of the machining process, the correct analysis of the existence of the above defects. But in general, the high temperature bearing failure usually show the overload failure. 4. - high temperature bearing failure mechanism Change fault clearing high temperature bearing in the work, under the influence of external or internal environment factors, the change of the original work with clearance of, can reduce the accuracy, and even the society 'killed' called clearance change and failure. , large amount of various factors such as interference of outside installation management does not reach the designated position, temperature rise caused by the expansion and instantaneous overload, intrinsic cultural factors such as residual austenite and the residual stress level in the development of unstable state, etc are the main problems of clearance change failure reasons. A: high temperature bearing failure data analysis and prevention research methods: next article no