Sep 01, 2020
Since the shot blasting machine is a wearable equipment, there will be various problems in daily use. The blades of the shot blasting machine are made of white cast iron. Since the white cast iron is technically good and the price is relatively cheap, of course you need to participate Some alloy elements, the primary alloying element is chromium, its composition is as high as 30%. In addition to adding chromium to cast iron, some Ni, Mo, w, v. The amount is 0.5 to 6%. Then heat treatment, Martensite and austenite arrangements are available. A lot of carbides that can ensure the alloy has high hardness are infiltrated into this arrangement, which improves the working ability of the parts in a corrosive medium environment. The service life of the shot blasting machine unit mainly depends on the concavity and convexity of the blade life, the structure of the shot blasting machine and its blades, the raw materials, the quality and shape of the shot, the speed of shot blasting, the angle of shot, and the recovery condition of shot blasting. It is also related to the chemical composition of the alloy, the solution casting technology and the processing conditions after the furnace, as well as the metallographic arrangement and mechanical properties of the blade itself after heat treatment.
Through a lot of experimental analysis, we finally understand the cause of the failure of the shot blasting machine blade. The main reason for the failure of the shot blasting machine blade is the blade wear, so why is the blade wear?
Researchers have found that the blades of the shot blasting machine will be repeatedly impacted by the projectiles when working, and the basic structure of the blades will be deformed under such frequent impact. After the base tissue of the blade is squeezed to produce flow, it will harden and cause fracture under continuous impact. In this case, the surface of the blade has lost its protection, and the exposed body will produce fine cracks under frequent impact. At this time, the role of support will be lost and the projectile will easily be lost due to impact. Repeating this way will cause blade wear.
The blade of the shot blasting machine always rotates at a high speed when it is working, so the blade will always receive the pressure of the projectile. Such a periodic force will make the blade also bear periodic stress. According to the analysis, we can also draw a conclusion that most of the shot blasting machine blades are always in a low stress state.
Based on the above analysis, we have concluded that the failure of the shot blasting machine blade is mainly caused by the combined action of wear and fatigue. When the blade of the shot blasting machine is working, it will be subjected to periodic stress. Because the projectile wears the blade periodically, it also accelerates the deformation of the blade of the shot blasting machine and the loss of material. Wear and periodic stress will cause the blade to accumulate damage, which will cause the blade to break over time.
Fundamentally speaking, the root cause of the failure of the shot blasting machine blade is the concentration of force. If we can reduce the degree of this concentration, we can extend the service life of the blade.
If you need more relevant information, please inquire or come to Qingdao Wozhou Machinery Factory for inspection and negotiation!
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