Transactions of Materials and Heat Treatment

Title：Manufacture technology of large-sized hollow billet for powder superalloy

Authors： Yang Xiuqing1 Zhou Cheng′en2 Li Yuanyuan1 Lei Bingwang1

Unit： 1.Inner Mongolia North Heavy Industry Group Corp.Ltd. 2.College of Science Inner Mongolia University of Technology

KeyWords： powder superalloy small-sized hollow ingot upsetting for billetmaking hollow billet large-sized tubes

ClassificationCode：TG376.2

year,vol(issue):pagenumber：2025,50(3):197-204

Abstract：

The use of large-scale powder superalloy extrusion tube of Φ600 mm×Φ350 mm (outer diameter × inner diameter) to prepare advanced aero-engine drum shafts and other ring (cylinder) parts has become a new research direction today. For the problem that small-scale hollow powder superalloy ingot of Φ660 mm × Φ315 mm × 1070 mm (outer diameter × inner diameter × length) could not be used as the billet for direct extrusion of the 900 series, a superalloy ingot structure of “jacket cladding+built-in mandrel+insulation pad” was developed, and the metal flow law of closed upsetting for superalloy was studied. At the same time, the influence degrees of different materials and process parameters on the shape and size of the billet were analyzed by numerical simulation technology. The results show that when cladding the hollow billet of powder superalloy,the mandrel of 40Cr steel with the length of 750 mm,the base and end cover of steel 15 with the thickness of 100 mm, and the hard jacket of steel 15 with the thickness of 30 mm are selected. After heating and closed upsetting, there is no cracking on the surface of powder alloy. After removing the mandrel, the inner hole diameter of the billet is ≥Φ355 mm, which meets the requirements of the extrusion process.

Funds：

作者简介：杨秀清（1966-），女，学士，正高级工程师 E-mail：yangxiuqing360b@126com

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