Due to the rapid development of my country’s aircraft manufacturing industry, the comprehensive performance of domestic aircraft has been rapidly improved, and the demand for stainless steel precision pipes has also increased significantly. Generally speaking, the stainless steel pipes involved in this field mainly include precision stainless steel pipes and high temperature. The annual consumption of alloy pipes and corrugated metal hoses is about 5,000 tons. Among them, the most used are high nickel alloy stainless steel pipes and 600 series stainless steel pipes, such as 630/631 materials. Some of the new stainless steel materials are also used as domestically-made new high-performance structural steel stainless steel materials that can be used in the development of new domestic aircraft. The main ones are 16Co14Ni10Cr2Mo, 23Co14Ni12Cr3Mo, TM210A, 16Cr3NiWMoVNb, 0Cr13Ni8Mo2Al, 1Cr15Ni4Mo3N, 0Cr15Ni5Cu2Ti, 0Cr16NiCu2MoNTiCu2MoNTi, 0Cr16NiCu2MoNTi.
With the continuous development and progress of my country's aviation manufacturing technology, especially the new generation of aircraft has more stringent requirements for the performance of structural materials. Among them, structural steel and stainless steel new materials with high strength, high toughness, good fatigue resistance and high purity are widely used in new aircraft. A number of high-performance structural steels and stainless steels for aviation, such as AF1410AerMet100, PH13-8Mo, 18Ni (300), 16Х3НВФМБ, 13Х15Н4АМ3-Ш, etc., have been developed/imitated in China. Compared with ordinary steel, the technical level of new high-performance structural steel and stainless steel for aviation is obviously higher.
In addition, the domestic demand for cutting-edge weapons is increasing, and the use of new technologies to manufacture new military equipment is also subject to strict requirements. As far as fighters are concerned, because of extremely stringent take-off and landing conditions, the performance of the landing gear is limited. There are extremely high requirements.
Features of high-performance stainless steel pipe
The characteristics of high-performance stainless steel pipe in the application field are mainly high strength and toughness, excellent welding performance, good fatigue resistance and stress corrosion resistance, and insensitive to notches and hydrogen embrittlement. Among them, AF1410 steel is the only steel grade that can be used for damage tolerance design so far, and it has been used to make aircraft flat tail shafts; AerMet100 steel is successfully developed by adjusting the alloy composition on the basis of AF1410 steel, and its tensile strength is greater than 1 930 MPa It is the steel with the best strength and toughness at present. It has been successfully used in the landing gear of F/A18 carrier aircraft, F22 and F35 aircraft, armor protection of Comanche gunships, aviation black box housing, etc. It is also a new generation of domestic aircraft The material of choice for landing gear.
In addition, PH13-8Mo steel is a martensitic precipitation hardening stainless steel, which has the highest strength among the existing precipitation hardening stainless steels. It is usually used to make large cross-sections with a yield strength of up to 1 515 MPa, good plasticity, and non-anisotropic properties. Dimensional parts production. Domestic satellite applications are booming. Civilian satellites have been widely used in many fields such as earth observation, communication and broadcasting, navigation and positioning, and have achieved significant social and economic benefits. China has established satellite applications such as satellite communications, satellite meteorology, satellite resource surveys, satellite navigation and positioning, satellite microgravity experiments, and space scientific research. The rapid development of these cutting-edge technology fields is inseparable from the rapid development of stainless steel tube technology, which in turn promotes the rapid progress of stainless steel tube production and processing technology.