無縫鋼管的矯直殘余應力與壓下量和溫度的關(guān)系研究

Study Concerning Effect of Screwdown Amount and Temperature of Straightening on Residual Stress of Seamless Steel Pipe

摘要: 采用MSC.MARC有限元軟件模擬分析無縫鋼管的矯直過程,研究了在滿足無縫鋼管直線度要求的情況下,管體殘余應力與矯直壓下量和矯直溫度之間的關(guān)系。無縫鋼管矯直過程的模擬分析和實驗測試表明,無縫鋼管的彈性模量(或鋼級)越高,其矯直殘余應力越大;適當提高矯直溫度,可降低矯直殘余應力,提高無縫鋼管的機械性能。

Abstract: Based on the analysis as made via simulation of the straightening process of the seamless steel pipe as set up with the MSC.MARC Finite Element(FE) software, an investigation is conducted on the effect of the screwdown amount and temperature of straightening on the residual stress of the pipe body under the precondition that the straightness of the pipe is ensured. Owing to the said simulation analysis and relevant experimental measurements, it is identified that the greater the elasticity modulus(or the higher the steel grade) of the pipe, the bigger the after-straightening residual stress will be. Accordingly, the mechanical properties of the seamless steel pipe are expected to be improved with the said residual stress reduced by means of getting the straightening temperature enhanced appropriately.