Application of HIP-NNS to Large Complex Products Using Super Duplex Stainless Steel Powder

Application of HIP-NNS to Large Complex Products Using Super Duplex Stainless Steel Powder

Toyohito Shiokawa, Mitsuo Okuwaki, Hiroshi Urakawa

Abstract. In recent years, the productivity of offshore plants has been improved and the field of production from shallow water to deep sea has been expanded. Along with this, it is required that the plant equipment be upsized and maintenance-free. The conventional manufacturing method for duplex stainless steel parts such as valves for plant equipment was mainly forging. There is a problem though, it is difficult to obtain homogeneity with the physical characteristics. One solution to this problem is powder sintering using HIPed near net-shaped (HIP-NNS) products. However, near-net manufacturing requires advanced capsule design and powder filling control. In this paper, we will report the results of the HIP-NNS method when manufacturing a large-sized complex-shaped powder sintered product using the world’s largest HIP device.

Keywords
Near Net Shape, Super Duplex Stainless Steel, NORSOK

Published online 12/8/2023, 6 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Toyohito Shiokawa, Mitsuo Okuwaki, Hiroshi Urakawa, Application of HIP-NNS to Large Complex Products Using Super Duplex Stainless Steel Powder, Materials Research Proceedings, Vol. 38, pp 35-40, 2023

DOI: https://doi.org/10.21741/9781644902837-6

The article was published as article 6 of the book Hot Isostatic Pressing

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] Toyohito Shiokawa, Hiroshi Urakawa, Mitsuo Okuwaki, Yuto Nagamachi “HIP Process of a Valve Body to Near-Net-Shape using Grade 91 Powder” Proceedings of International Conference on HIP, 2017, pp. 58-64.
[2] T. Shiokawa, Y. Yamamoto, S. Hirayama and Y. Nagamachi “Comparison of experimental and FEM simulations of densification during HIP processing of powder into a cylindrical component” Proceedings of International Conference on HIP, 2011, pp. 225-230.
[3] Björn-Olof Bengtsson, “PROGRESS IN THE MATERIAL PROPERTIES OF STAINLESS POWDER FOR NEAR NET SHAPE PARTS. 140605-1012” Proceedings of International Conference on HIP, 2014, 104