Stainless steel pipe used in aircrafts and ultra-low temperature systems of aircrafts, and manufacturing method thereof
A stainless steel tube, ultra-low temperature technology, applied in the field of stainless steel tubes, can solve the problems that cannot satisfy the ultra-low temperature system, and achieve the effects of good strength, toughness, corrosion resistance, good manufacturability, and high temperature performance
Active Publication Date: 2012-01-18
SHANGHAI ZUNMA AUTO PIPE CO LTD
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- Application Information
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Problems solved by technology
[0002] With the rapid development of the economy, stainless steel pipes are often required for aircraft and their ultra-low temperature systems, and the nickel 5 steel currently used in large quantities can only be used at -156°C, which cannot meet some ultra-low temperature systems, such as natural gas storage systems- Use at 196°C, or even at lower temperatures
Method used
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Embodiment Construction
[0016] Next, the present invention will be described in more detail. In this specification, "%" indicating the composition of steel means "mass%" unless otherwise specified.
[0017] The invention is applicable to stainless steel tubes for aircraft and its ultra-low temperature system, which is rolled from stainless steel tube blanks containing the following mass percentage components: C: 0.04% or less, Mn: 8.00% to 10.00%, Si: 1.00% or less, P : 0.03% or less, Cr: 19.00% to 21.00%, Ni: 5.5% to 7.5%, Mo: 0.75% or less, Co: 0.75% or less, N: 0.15% to 0.40%, and the remainder is iron.
[0018] The preparation method of the stainless steel pipe for the above-mentioned aircraft and its ultra-low temperature system includes the following steps in sequence:
[0019] A. The Φ60mm~Φ75mm round steel containing the above components is hot pierced by a Mannesmann piercer to form a tube blank of Φ65mm×5.5mm or Φ75mm×6.5mm, and then the tube blank is pickled for 20 minutes, and the materi...
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Abstract
The invention discloses a stainless steel pipe used in aircrafts and ultra-low temperature systems of the aircrafts. The stainless steel pipe is manufactured from a rolled stainless steel pipe billet which comprises components of, by mass: less than 0.04% of C, 8.00% to 10.00% of Mn, less than 1.00% of Si, less than 0.03%of P, 19.00% to 21.00% of Cr, 5.5% to 7.5% of Ni, less than 0.75% of Mo, less than 0.75% of Co, 0.15% to 0.40% of N, and balance of Fe. The stainless steel pipe manufactured with the provided technical scheme has tensile strength of 979 to 1117 MPa, yield strength of more than 827 MPa, and extensibility of 20%. The austenite of the steel is stable. Even the steel is processed from 60% of cold working, a non-magnetic character is maintained. The steel has good toughness and corrosion resistance. Under room temperature, the strength of the steel is two times those of common austenitic stainless steel 304, 321, and 316. The steel has good technical property, corrosion resistance, and high temperature oxidation resistance. Under an ultra-low temperature of -253 DEG C, the steel has strong strength, strong toughness, and good high-temperature property. The steel is widely applied in high temperature oxidation resistant components and non-magnetic components in aviation and low-temperature systems. The invention also discloses a manufacturing method of the stainless steel pipe.
Description
technical field [0001] The invention relates to the technical field of stainless steel pipes, in particular to a stainless steel pipe for an aircraft and its ultra-low temperature system and a preparation method. Background technique [0002] With the rapid development of the economy, stainless steel pipes are often required for aircraft and their ultra-low temperature systems, and the nickel 5 steel currently used in large quantities can only be used at -156°C, which cannot meet some ultra-low temperature systems, such as natural gas storage systems- It can be used at 196°C or even lower temperature. Contents of the invention [0003] One of the technical problems to be solved by the present invention is to provide a stainless steel pipe that can have high strength and toughness at an ultra-low temperature of -253°C, and also has good high-temperature performance. [0004] The second technical problem to be solved by the present invention is to provide a method for prepa...
Claims
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IPC IPC(8): C22C38/58C21D8/10
Inventor 王路健夏祯兴
Owner SHANGHAI ZUNMA AUTO PIPE CO LTD