将Φ25 mm的TC11钛合金棒材在四机架Y型轧机上连轧至Φ17 mm,孔型系统选为平三角-圆-平三角-圆.试验测试了轧件入口温度为950℃时在四机架连轧过程中的温降,以及轧件温度为750,850,950,1050℃时不同压下量对应的轧制力、轧制力矩值；分析了轧件在不同孔型中轧制时的变形区几何形状;修正了轧制力数学模型；计算值与试验值偏差较小.因此,该数学模型计算的轧制力可以为Y型三辊轧制钛合金棒材提供理论研究和工程实践基础.
Titanium alloy TCll rods with Φ25 mm,were rolled to that with Φ17 mm in four passes by a triangle-round-triangle-round sequence.The rod temperature drop was measured at entry temperature 950 ℃ during continuous rolling,and the rolling forces and the roll torques were measured in the case of different area reductions at 750,850,950,and 1050 ℃.Then,the geometry shapes of deformation zone were analyzed for different passes.The mathematic model of the rolling force for Y-type mill was modified based on empirical modifications of two-roll theories.A number of experiments were also carried out to check the validity of the proposed mathematic model.The result shows that the difference between the calculated value and the experimental value is relatively minor.Therefore,this mathematic model can provide the foundation for theoretical research and engineering application of Y-type rolling process.
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