Precision parts processing and how to prevent wear

Precision parts processing plant common type of wear mainly includes the running-in wear, hard wear and surface fatigue wear, thermal wear, phase transformation wear and hydrodynamic wear these. Running-in wear is mechanical in the normal load, speed and lubrication conditions of wear, the wear general development is slow, in the short term, little influence on the quality of machining. Hard wear is due to the fall of the parts of abrasive or solids from the outside into the machine, with the processing area, subject to mechanical cutting and grinding, cause the damage of components, which is more serious impact on the quality of machining. Precision parts processing surface fatigue wear is mechanical in under the action of alternating load, the tiny crack or class dotted pits, which causes the damage of parts. This kind of wear and pressure size, load characteristics, usually part is closely related to the factors such as material, size. Is hot shape wear parts in the process of friction heat effect on parts, the parts have temper soften, burning phenomenon such as crease. That usually occurs in the high speed and high pressure of the sliding friction and wear of destructive is bigger, accompanied by the nature of accident and wear. Corrosion wear is a kind of chemistry, chemical corrosion and wear. When the workpiece surface with acid, alkali, salt liquid or harmful gas contact, will be made by chemical attack, or combined with oxygen to generate easy to fall off the surface of the parts of hard and brittle metal oxide and makes parts wear and tear. Phase transition is wear and tear parts working under high temperature condition for a long time, the parts surface metal organization heated bigger grains, grain boundary surrounded by oxidation, produced a small clearance, decreased parts vulnerable, abrasion resistance, resulting in the parts of wear and tear.
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