Knowledge of Lanzhou 180 alloy steel pipe
The main parameters of traditional pass of micro stretch reducing mill include: spreading coefficient, average diameter of pass, long half shaft of pass, short half shaft of pass and ovality coefficient.
3. Actual production effect
After reducing the total reduction rate and single frame reducing rate and optimizing pass parameters, the physical samples of 114mm × 22mm finished steel pipe are taken. Through the actual measurement data, it shows that the degree of "internal hexagonal" is significantly reduced, which meets the national standard and fully meets the needs of users. By comparing the measured data before and after optimization, it can be seen that the "inner hexagonal" measurement value of steel pipe produced by the optimized 114mm pass is significantly reduced.
4 Conclusion
The production practice has proved that the inner hexagonal defect of micro tension reducing steel pipe can be reduced or even eliminated by reducing the total reducing rate and single frame reducing rate and selecting reasonable pass design.
Sizing technology of micro tension reducing mill for seamless alloy steel pipe
Lanzhou 180 alloy steel tube news
Alloy steel pipe price traders will reduce the willingness to stock up, increase the willingness to ship, steel prices continue to fall. In addition, affected by negative factors such as steel mill output rising and slow social inventory deceleration, downstream terminal procurement is cautious, demand is cold, market bearish sentiment is gradually strong, and alloy steel pipe price wait-and-see attitude is obvious. As a result, steel prices continued to decline last week. At the beginning of the week, the futures market continued to open low and fluctuate. In addition, during the weekend, the steel billet fell in a narrow range. The pessimism and panic in the spot steel market intensified again, and the medium and heavy plate market continued to weaken. It is late May, and the problem of funds for businesses has also followed. The phenomenon of cash out at low prices in local markets has increased significantly, and the pressure of stabilizing market prices is increasing. In terms of steel mills: the base price of 16-25mm thick plate in Puyang, Wenfeng and other second-line steel mills is still stable. However, even if the price is locked, there is still room for preferential price of 20 yuan. Merchants have strong risk awareness and dare not order in large quantities. Only a few traders with serious shortage of resources order to replenish inventory.
Lanzhou 180 alloy steel pipe in stock
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