国内精品自线一区二区,亚洲欧美视频在线观看二区,久久福利合集精品视频

文章信息/Info

Author(s):: DU Jinhui; LU Xudong; DENG Qun; ZHUANG Jingyun; （Central Iron & Steel Research Institute, Beijing 100081, China）

摘要:: GH4169合金具有較高的高溫強度，優(yōu)異的持久、蠕變和疲勞性能，同時具備良好的加工和焊接性能，廣泛用于航空、航天、石化等領域。隨著航空、航天發(fā)動機性能的不斷提高，對發(fā)動機關鍵用材GH4169在承溫能力、持久蠕變性能和抗疲勞性能提出了更高要求，以滿足先進航空發(fā)動機高性能、高可靠性、長壽命的需求。從合金改型、冶煉工藝優(yōu)化、熱加工技術提升等方面，系統(tǒng)論述了GH4169合金近50年基礎研究成果及工程制備技術的進展。內容包括基于提高熱穩(wěn)定性，發(fā)展適應更高使用溫度的改型合金的合金化原理；基于制備大尺寸、無偏析、純凈化鑄錠的三聯(lián)冶煉工藝技術進步；基于制備細晶棒材的快鍛和徑鍛聯(lián)合開坯的熱加工技術提升；基于實現(xiàn)近凈成形超塑性變形的熱模鍛和等溫鍛的最新進展。

Abstract:: As a result of higher high temperature strength, excellent rupture stress, creep and fatigue properties, as well as good processing and welding performance, GH4169 alloy has been widely used in aerospace, petrochemical and other fields. With continuous improvement on performance of aeronautical and astronautical engines, some higher requirements were put forward to the key material GH4169 Such as temperature bearing capability, rupture stress and creep properties as well as fatigue resistant performance were improved to meet the demands of high performance, high reliability and long service life of the advanced aeroengines. The achievement of basic research and development of industrial manufacture technologies were systematically expounded from aspects of alloy modification, optimization of melting process, improvement of hot deformation technology for the past fifty years in this paper. Expounded contents include: development of alloying principle of modified alloy with higher temperature bearing capability for improving the thermal stability; triple melting technology for the preparation of large sizd clean ingot without segregation, promotion of hot processing technology of press forging and radial forging combination for the preparation of fine grained bar; new progress of hot die forging and isothermal forging for the realization of near net forming.