Gr5 titanium alloy ring parts properties
Titanium ring parts rolling process is usually configured with billet making equipment, ring rolling machine, heat treatment and other equipment to organize production, compared with the traditional ring parts free forging process, ring parts die forging process, ring parts flame cutting, has a better technical and economic effect, specifically in the following aspects:
1, small equipment tonnage, less investment, wide processing range. Ring rolling deformation can be achieved through the accumulation of local deformation and ring forming. In comparison to overall die forging, the deformation force of ring rolling is much reduced and therefore both tonnage of rolling equipment and investment costs for equipment are drastically decreased. The production of various sizes and cross-sectional shapes of ring parts, small mass less than 1kg, large can reach several tons or even tens of tons, the diameter of more than 10 m. In a rolling mill can often produce different specifications of the ring parts without changing rolls.
2、No need for special molds, low production cost. Ring production only needs one set of rolls to solve the problem of producing different types and sizes of ring parts. While using die forging production, the production of each type of ring requires a set of molds, each set of molds costing hundreds of thousands of yuan, resulting in higher production costs.
3、High dimensional accuracy of ring parts, less machining allowance and high material utilization. The geometric accuracy of the ring formed by rolling is comparable to that of the die forging, and the blank punching with small skin, and no flying edge material consumption. Comparative to free forging and flame cutting processes, accuracy is greatly increased and machining allowance decreased considerably; additionally, no rough layers existed in free forging and horse frame reaming processes or flame cutting processes. When the Federal German Henrichs plant produces ring parts with diameter less than 1000mm, the outside diameter error can be controlled to ±1mm.
4、Good internal quality of ring parts. Roll formed titanium ring parts, the internal organization is dense, fine grains, fibers along the circumferential direction, its tensile strength and fatigue life is significantly higher than other forging and mechanical processing of ring parts produced.
5、High productivity. The maximum productivity of ring parts using rolling production method has reached 1000 pieces / h, much higher than the free forging and flame cutting of ring parts, but also higher than the productivity of die forging. In the United States, the production of a diameter of 4500mm, height of 600mm, the mass of 6t ring parts, only one heating, operated by a worker, rolling 10mi can be. And with forging method, it needs 3 times heating, operated by 5 workers, finished by lh~2h.
6、Save material. Ring rolling typically achieves an utilization rate of 90-95% while forging methods typically result in losses between 20%-40% of metal being utilized.
The above aspects make the cost of titanium ring rolling lower than other production methods. Federal Germany has compared the cost of ring parts produced by various methods. The production of a diameter of 3500mm, high for 110mm 45 steel ring parts, with plate bending after welding method of production than the rolling method of production costs 26% higher; free forging method of production than the rolling method 77% higher; with flame cutting method of production than the rolling method 160% higher. British Luo a Luo company manufacturing jet engines used ring parts, using the rolling method instead of forging method of production, each engine can reduce the cost of 100,000 U.S. dollars. This shows that for all types of ring production, especially in the field of aviation, aerospace and other engines used in the difficult to deform the material ring parts, rolling manufacturing technology have good technical economy.
