Numerical simulation for optimization of the extrusion process of GH4169 tubes
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摘要: 結合GH4169在不同溫度、應變速率下的真應力-應變曲線,應用Msc.Superform有限元軟件對GH4169合金管材正擠壓進行了數值模擬,系統分析討論不同擠壓參數對擠壓過程的影響.結果表明:GH4169合金管材可以通過熱正擠壓成形,當擠壓速度為100 mm·s-1和300 mm·s-1,模角為20~30°,坯料預熱溫度為1040~1 050℃時,以及在良好的潤滑條件下可以獲得優化可控的擠壓工藝.Abstract: The hot extrusion process of GH4169 superalloy tubes was simulated by using Msc.Superform software with the true flow stress-true strain curves of GH4169 alloy at different temperatures and strain rates.The effects of technical parameters on the extrusion processing were systematically analyzed to optimize the extrusion process.The results show that high quality products can be expected using forward extrusion.The optimal parameters are the extrusion speed of 100 and 300 mm·s-1,the die angle of 20 to 30°,the billet preheating temperature of 1 040 to 1 050 ℃ and a better lubrication condition.
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Key words:
- high-temperature alloys /
- hot extrusion /
- tubes /
- numerical simulation
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