厚壁大直徑0Cr18Ni9Ti鋼管彎頭制作工藝的研究

RESEARCH ON MANUFACTURE PROCESS FOR LARGE-SIZED HEAVY-WALL 0Cr18Ni9Ti STEEL ELBOW

摘要: 厚壁大直徑不銹鋼管的擴徑推彎成型是無縫彎頭成型的難點。針對φ406.4mm×32mm-R610mm的厚壁0Cr18Ni9Ti鋼管彎頭擴徑推灣成型過程,校核了芯棒的強度,提出了芯棒的合理材質(zhì)及加工方法,確定了芯棒的形狀、溫度分布及成型管還與感應(yīng)圈之間的間隙等。經(jīng)生產(chǎn)驗證,其結(jié)果合理可行。

Abstract: Expanding/push-thending formation is the hardnut in forming process of seamless steel elbow with large-sized, heavy-walled stainless steel tube as blank. Based on the expanding/push-bending formation of the elbow with the φ4O6.4mm×32mm-R610mm, heavy-walled 0Cr18Ni9Ti steel tube as blank, calibration of the mandrel strength was made, and proper material of the mandrel and processing method were proposed. The mandrel profile, temperature distribution as well as clerance of the induction coil were also determined. Relevand operation practice has proven the effecativeness of all the said research results.