Study on extrusion forming of superalloy tubes by flow function method
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摘要: 針對IN690高溫合金管材在擠壓過程中擠壓力大及預測不準等問題,以優化設計擠壓工藝和參數進而實現降低擠壓力、減少能耗為目標,應用流函數法建模分析擠壓變形過程和建立擠壓力求解模型,得到了穩定擠壓時金屬的速度流線.研究了擠壓溫度、摩擦因數和模具角度等因素對擠壓力的影響規律,建立了IN690高溫合金管材擠壓工藝參數與擠壓力的關系.以擠壓力最小為優化目標,優化設計了最佳擠壓溫度和模具角度.Abstract: There exist high extrusion force and its inaccurate forecast in the extrusion process of an IN690 superalloy tube.After the flow function method was used to analyze the extrusion process and to construct a mathematical model of solving the extrusion force,the flow lines of the superalloy were presented in the stable extrusion state.The relationship between technological parameters and extrusion force of the IN690 superalloy tube was determined on the basis of studying the effects of extrusion temperature,friction coefficient and mold angle on the extrusion force.The extrusion temperature and mold angle were optimized by minimizing the extruding force.
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Key words:
- superalloys /
- nickel alloys /
- extrusion /
- flow function /
- optimization
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