Factors affecting the mechanical wear
Mechanical wear of the main factors affecting a part material, work load, velocity, temperature, lubrication, surface quality, assembly and installation of quality, mechanical structural features and sports properties.
(1) wear and tear of parts materials
Parts wear resistance depends on its hardness and toughness. Determine the surface hardness of the ability to resist deformation, but too easy to make the hardness of fragility, and the material surface grinding granular peeling; toughness can prevent the grit, increase its wear resistance.
After heat treatment or chemical heat treatment of steel, you can get excellent mechanical properties, improve the mechanical wear resistance. Sometimes, the use of surface flame hardening or high-frequency quenching method of the material to improve wear resistance. Or the use of carburizing, nitriding, cyanide method, the surface of the steel with high hardness and wear resistance.
In the combination of parts, such as deputy in the shaft bearing, as is the need to process the main parts, therefore, should be wear-resistant material (such as high-quality alloy steel) to produce; of relatively simple parts, such as bearings or bearing liner , then the choice of babbitt, copper alloy, aluminum alloy and other lead-based or relatively soft materials (also known by run-gold) to make in order to achieve the purpose of reducing friction and wear.
(2) mechanical work load on the wear of
Generally speaking, the greater the pressure unit, the more wear and tear parts increased the size of the mouth in addition to the load, the load characteristics have a direct impact on the wear and tear. Such as the static load or variable load, without impact load. Short-term or long-term load and so on. Generally not long-term overload and shock load to bear.
(3) mechanical effects of velocity on the wear and tear
Mechanical operation, high and low speed, direction, speed and constant speed, forward and reverse, and off, have varying degrees of wear and tear effect. Normally in dry friction conditions, the faster the speed the higher the wear and tear; the rate of lubricant, the more easy to form the liquid to reduce friction and wear; start the machine the higher the frequency, mechanical wear and tear is also faster.
(4) temperature, humidity and environment effects of wear and tear
Temperature mainly affects oil absorption intensity. Lubricant film has a very high mechanical stability, but the temperature and chemical stability is poor, while at high temperature and chemical changes, the oil will lose its adsorption properties.
If mechanical work environment by moisture, water, gas, gas, dust, iron filings, or other liquids, gases, chemicals and other corrosive media, the impact will lead to and accelerate the oxidation and corrosion of mechanical wear.
(5) The surface quality of parts
Mainly refers to the mechanical surface quality does not increase quality, including the macro-geometry, surface roughness, and marks the direction.
Surface roughness of each load in a most reasonable roughness, the wear volume of the smallest, light-load a reasonable roughness smaller than the overload; in the same load, generally speaking. The smaller the roughness, wear smaller, but more than reasonable wear and tear will gradually increase after point. This is because it is too smooth to make contact with the surface by the fire, divided between the attraction increased, resulting in the possibility of adhesive wear also increases.jaw crusher Impact Crusher
Processing your request, Please wait....
