Product knowledge about the performance of steel shot and steel grit

Speaking of steel shot basically a lot of people do not know what steel shot is for, what is the use of steel shot? Only people who have had relevant work experience know, so what exactly is the role of steel shot? Steel shot is commonly used in steel workpiece coating before the removal of oxide skin and rust treatment, in this case often use centrifugal shot blasting equipment. The spherical shape and low hardness of the steel shot does not cause much wear and tear on the equipment. Steel shot can be used for grinding and descaling of castings and surface treatment of castings. Some steel structures, shipyards need to be pre-treated with steel shot before painting, rust removal.

First, steel shot is a common metal workpiece treatment materials, steel shot of tight organization, uniform particle size, with steel shot treatment of metal workpiece surface can play a role in increasing the surface pressure of metal workpiece, can be very good to improve the fatigue resistance of the workpiece. The use of steel shot to deal with the surface of metal workpieces has the characteristics of fast cleaning speed, steel shot and steel sand have the appropriate hardness, has a good rebound, the internal corners and complex shapes of the workpiece can be cleaned up uniformly and quickly, shorten the time of the surface treatment, and improve the efficiency of the work, it is a very good surface treatment material.

Second, steel shot is a commonly used surface treatment materials, steel shot a variety of types of steel shot, for different types of steel shot, the need for raw materials and equipment are also different. Third, the steel shot is a high-quality wear-resistant materials, steel shot of moderate hardness, toughness, good impact resistance, long service life. In cleaning the workpiece has a good rebound, fast cleaning speed, low consumption. Steel shot is used in a wide range of areas, such as castings, forgings, and machined parts after the surface of the parts and components after heat treatment of the surface of the parts and other areas. Ordinary manufacturing, shipbuilding, etc. are to be used in steel shot.

Shot blasting treatment is poor:

 (1) the supply of steel shot is insufficient, this time the current value of the nine thrower is lower than the specified value, should make up for the addition of pellets.

 (2) into the shot blasting workpiece with water, resulting in pellet agglomeration, blocking the bottom of the shot blasting room or pellet conveying pipeline, clean up all plug equipment. Whether or not to adjust the cleaning machine draining and drying part, to ensure that the workpiece does not carry water.

 (3) steel shot particle size becomes fine (containing should be separated to remove the fine particles) check the separator, adjust the baffle, increase the separator air volume.

 (4) improper shot blasting, check the direction of the directional set of direction and adjustment.

 (5) impeller, drum rotation direction is not correct, correction.

 (6) Impeller, directional sleeve, wheel wear, check and replace.

 (7) serious cast corrosion of the workpiece or serious oil contamination. The former increase shot blasting time or re-throwing, the latter adjust the cleaning to ensure that the degreasing effect.

 (8) equipment failure (including equipment leakage), overhaul equipment.

 Separator discharged in the waste pills contain coarse available pellets: separator air volume is too large. Adjust the butterfly valve, reduce the air volume.

 Pellets dirty with oil: workpiece degreasing is not clean, contamination of pellets and workpiece. Adjust the cleaning to ensure the degreasing effect.