The advantages of wear-resistant elbow and wear-resistant 7075 aluminum plate are different from those of traditional steel pipe, wear-resistant alloy cast pipe, cast stone pipe, steel plastic pipe and steel rubber pipe. The outer layer of wear-resistant 7075 aluminum plate is seamless steel pipe. 7075 aluminum plate chemical plant: Coal Transportation 7075 aluminum plate. The inner layer is corundum. The hardness of corundum layer is as high as hv1100-1400, which is equivalent to WC-Co alloy. The wear resistance of corundum layer is more than 20 times that of carbon steel pipe. The wear resistance of the wear-resistant 7075 aluminum plate mainly depends on the corundum layer with the thickness of several millimeters, which is more than the composition and structure of the wear-resistant alloy cast steel pipe and cast stone pipe, and the thickness has a qualitative leap to the wear resistance.
In addition to high quality and good performance, the performance of 7075 aluminum plate is higher than that of other wear-resistant and corrosion-resistant heat pipes. The weight of 7075 aluminum alloy wear-resistant plate with the same specification and unit length is only about half of the wear-resistant alloy cast pipe, and the project cost per meter is reduced by 20% - 30%; only one third of the cast stone pipe weight is needed, and the project cost per meter is reduced by 5% - 10%; the price of 7075 aluminum plate used for corrosion resistance or high temperature resistance is only a small part of stainless steel pipe.
7075 aluminum plate production process
1. Raw materials are strip coil, wire rod and flux. Strict physical and chemical tests shall be carried out before placing.
2. Butt joint of strip head and tail, single wire or double wire submerged arc welding, and automatic repair of submerged arc welding after rolling into 7075 aluminum plate.
3. Before forming, the strip shall be leveled, cut, planed, cleaned, transported and bent.
4. The electric contact pressure gauge is used to control the pressure of the oil cylinders on both sides of the conveyor to ensure the smooth transportation of the strip steel. \5. Adopt external control or internal control roll for forming.
6. Adopt the weld gap control device to ensure that the weld gap meets the welding requirements. Strictly control the pipe diameter, the number of staggered edges and the gap between welds.
7. Lincoln welding machine is used for single line or double line submerged arc welding of internal and external welding machines to obtain stable welding specifications.
8. The continuous on-line ultrasonic automatic wound detector is used to detect the completed weld to ensure the coverage rate of non-destructive testing of spiral weld is 100%. If there is any defect, it will automatically alarm and spray print, and the production personnel can adjust the process parameters at any time to eliminate the defect.
9. Air plasma cutter is used to cut 7075 aluminum plates into single pieces.
10. After cutting into a single 7075 aluminum plate, the first three aluminum plates of each batch of 7075 shall be subject to strict initial inspection system to check the mechanical properties, chemical composition and melting state of welds, as well as the surface quality and non-destructive inspection of 7075 aluminum plate, so as to ensure that the pipeline manufacturing process is qualified before formal production.
11. Artificial ultrasonic and X-ray re inspection shall be carried out for the parts with continuous acoustic flaw detection marks at the weld. If there is any defect, NDT shall be carried out again after repair until it is confirmed that the defect has been eliminated.
12. Use X-ray television or film to inspect the pipe at the intersection of butt weld of strip and T-joint of spiral weld.
13. Each 7075 aluminum plate is hydrostatic tested, and the pressure is radial sealed. The test pressure and time are strictly controlled by 7075 aluminum plate hydraulic microcomputer test device. Test parameters are printed automatically.
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