论文部分内容阅读
基于DEFORM-2D有限元平台,以INCONEL625难变形合金大型厚壁挤压管为研究对象,通过虚拟正交与回归分析,研究了工艺参数坯料预热温度(P)、模具预热温度(M)、挤压速度(V)、摩擦因子(F)、挤压比(λ)和模具几何结构参数凹模半角(β)、凹模圆角(R1,R2)、工作带长度(L)对该过程挤压力峰值和模口管材温度峰值的影响。结果表明,P,F,V,β,λ5个参数对挤压力峰值和模口管材温度峰值的影响较为显著;通过逐步回归法建立了挤压力峰值和模口管材温度峰值与上述5个主要参数之间的回归数学模型,并通过该回归数学模型以额定挤压力200 MN和模具出口管材最高温度1250℃为条件确定了5个主要参数的合理取值范围:F=0.01~0.02;V=100~200 mm/s;P=1000~1250℃;β=35°~50°;λ=4.5~7;在此基础上,建立了多个影响显著参数下的INCONEL625难变形合金大型厚壁管挤压极限图,并阐明了该挤压极限图的制作原理和应用。经验证,该挤压极限图是可行的。
Based on the DEFORM-2D finite element platform and INCONEL625 large-wall thick-walled extruded tube, the parameters of preheating temperature (P), mold preheating temperature (M) , Extrusion speed (V), friction factor (F), extrusion ratio (λ) and mold geometry parameters die half angle (β), die radius (R1, R2) The process of extrusion peak pressure and die pipe temperature peak. The results show that the influence of five parameters of P, F, V, β and λ on the peak value of extrusion force and the peak temperature of die-pipe is significant. The peak value of extrusion pressure and the peak temperature of die- The mathematical model of the regression was established and the reasonable range of the five main parameters was determined by the regression mathematical model under the conditions of the rated squeezing pressure of 200 MN and the maximum temperature of the die outlet pipe of 1250 ℃. F = 0.01 ~ 0.02; V = 100-200 mm / s; P = 1000-1250 ° C; β = 35-50 °; λ = 4.5-7. On the basis of this, a series of large-scale thicknesses of INCONEL625 hard- Wall tube extrusion limit map, and illustrates the extrusion limit diagram of the production principle and application. It is verified that this squeeze limit graph is feasible.