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研究了G3镍基耐蚀合金管材玻璃润滑热挤压工艺中润滑膜的成膜行为,建立了润滑膜厚度的理论计算模型.同时,针对6000 t卧式挤压机,结合G3合金热挤压工艺有限元模拟分析,对热挤压工艺参数和玻璃润滑剂黏度进行了系统的研究.结果表明,可以通过玻璃润滑膜厚度及完成一次热挤压所需玻璃垫厚度的理论计算公式优化G3合金管材热挤压工艺参数,并进一步获得了玻璃润滑剂黏度性质须满足:玻璃粉的软化温度大约为720℃;在720-800℃,玻璃黏温系数在-0.05℃~(-1)和-0.04℃~(-1)之间;热变形温度1100—1200℃区间的黏度为25—200 Pa.s.
The film forming behavior of lubricating film in G3 nickel-base corrosion-resistant alloy pipe glass was studied, and the theoretical calculation model of lubricating film thickness was established.At the same time, for 6000 t horizontal extruder, combined with G3 alloy hot extrusion Process finite element simulation analysis of the hot-extrusion process parameters and the viscosity of the glass lubricant were systematically studied.The results show that the thickness of the glass film can be completed by a hot press and the required thickness of the glass mat theoretical formula to optimize G3 alloy The hot extrusion process parameters of the pipe and further obtain the viscosity properties of the glass lubricant to be satisfied: the softening temperature of the glass frit is about 720 ℃; at 720-800 ℃, the viscosity coefficient of the glass at -0.05 ℃ -1 and - 0.04 ℃ ~ (-1); the thermal deformation temperature range of 1100-1200 ℃ is 25-200Pa.s.