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一种含Nb奥氏体耐热合金无缝管及其制备和组织调控方法
InventionUnknown
10Claims · 2 independent
§ Ⅰ
Dossier Overview
Applicant
北京科技大学; 江苏武进不锈股份有限公司; 湖州永兴特种不锈钢有限公司
Inventor
姚志浩; 梁凯; 朱秋华; 代卫星; 程健; 吴明华
Filing Date
Sep 2, 2026
Publication Date
Oct 27, 2026
IPC Classification
C21D 8/10 (2006.01)C21D 1/26 (2006.01)C21D 1/34 (2006.01)C22C 38/42 (2006.01)C22C 38/48 (2006.01)C22C 38/44 (2006.01)C22C 38/46 (2006.01)C22C 38/54 (2006.01)C22C 38/02 (2006.01)C22C 38/04 (2006.01)C22C 38/58 (2006.01)
本发明公开了一种含Nb奥氏体耐热合金无缝管及其制备和组织调控方法,包括:采用经热轧处理的含Nb奥氏体耐热合金管坯为原料;在二辊斜轧穿孔前对管坯进行分级加热,先在1000~1050℃保温60~150min,再升温至1100~1150℃保温15~20min;随后采用二辊斜轧方式进行热穿孔,轧辊转速30~60r/min;荒管经第一道次冷轧(变形量30~35%)、中间退火(1000~1050℃/60~150min水冷)、第二道次冷轧(变形量55~60%)后,于1200~1250℃保温30~60min进行固溶处理后水冷。本发明可有效抑制富Nb析出相链状分布,降低混晶倾向,成品管晶粒度可控制在5~7级。
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