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| The research progress of near net shaping hot isostatic pressing simulation |
| QU Zong-hong1,2，LIU Jian-tao1,2 |
（1. High Temperature Material Institute， Central Iron and Steel Research Institute， Beijing 100081， China
2. Key Laboratory of Advanced High Temperature Materials， Beijing 100081， China） |
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Abstract Near net shaping hot isostatic pressing （NNS-HIP） forming process has the advantage of high material utilization ratio and good uniformity of billet microstructure. It is an important forming process for complex shape parts made of nickel based PM superalloys and PM titanium alloys etc. The characteristics and production process of NNS-HIP， development and applications at home and abroad were introduced， and the microscopic and macroscopic powder densification models were also presented. By comparing and analyzing the numerical simulation and experimental results of hot isostatic pressing of different models， the advantages and disadvantages of different models were summarized， and the factors affecting the accuracy of numerical simulation were analyzed.
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Received: 12 June 2016
Published: 14 November 2017
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2017, Vol. 27 
