CN101713019B - Method for manufacturing spaceflight high-temperature alloy GH3600 fine thin-wall seamless pipe - Google Patents
Method for manufacturing spaceflight high-temperature alloy GH3600 fine thin-wall seamless pipe Download PDFInfo
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- CN101713019B CN101713019B CN2008102008445A CN200810200844A CN101713019B CN 101713019 B CN101713019 B CN 101713019B CN 2008102008445 A CN2008102008445 A CN 2008102008445A CN 200810200844 A CN200810200844 A CN 200810200844A CN 101713019 B CN101713019 B CN 101713019B
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Abstract
The invention relates to a method for manufacturing a spaceflight high-temperature alloy GH3600 fine thin-wall seamless pipe, which is realized by the following steps of: before the cold rolling of a finished product, carrying out the last semi-finished product solid dissolving treatment in a hydrogen protecting continuous bright heat treatment furnace at the heat treatment temperature of 960-1,010 DEG C for 10-15 minutes, and then cooling in the air; controlling the cold rolling deformation of the finished product to be 60-65 percent and controlling a specific value QE of the reduced wall thickness and the reduced external diameter to be not less than 1; controlling the temperature deviation of a vacuum finished product heat treatment furnace to be at most +/-3 DEG C and controlling the time error of all parts of the product entering the heat preservation temperature to be smaller than 10 minutes. The wall thickness of the fine thin-wall seamless pipe is 0.4mm. The granularity requirement of the product reaches 7-10.5 grades, and the fatigue resistance of the pipe is improved.
Description
Technical field
The present invention relates to a kind of manufacture method of spaceflight high-temperature alloy GH 3600 fine thin-wall seamless pipe, relate in particular to finished product grain fineness number control method in this method.
Background technology
Along with the continuous development of China's aerospace industry, the power and the safety performance of engine are had higher requirement.Spaceflight high-temperature alloy GH 3600 fine thin-wall seamless pipe is exactly the product innovation of developing in order to satisfy new work engine.
High-temperature alloy GH 3600 fine thin-wall seamless pipe is meant the nickel base superalloy pipe that is used for the space rocket propulsion system, and pipe is through the side of one-tenth, be wrapped in the rocket nozzle parts outsides after the welding side by side.Pipe interior delivering liquid hydrogen, it mainly acts on is the cooling down high-temperature jet element, to ensure the normal operation of rocket.
Because the fine thin-wall seamless pipe wall thickness is 0.4mm only, and need follow-up welding processing, if fine thin-wall seamless pipe grain fineness number size is uneven, then mechanical property can form unusually, thick crystal grain also can reduce pipe at anti-fatigue performance, and finally the safe operation to rocket constitutes potentially dangerous.
Grain fineness number control method of the prior art is to change the finished product grain fineness number by final cold deformation and adjustment finished product heat treating regime, this cold working method can't guarantee abundant, the homogeneous deformation of product grains, each position internal stress is inhomogeneous, required recrystallize energy is also therefore different, causes the grain size behind the thermal treatment recrystallize to produce difference.Simple by adjusting the finished product heat treating regime, can macroscopic view upward adjust the product grains degree, but can't realize the consistence of finished product grain fineness number.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of manufacture method of spaceflight high-temperature alloy GH 3600 fine thin-wall seamless pipe, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes by following steps:
The last one work in-process solution treatment of finished product before cold rolling carried out in hydrogen protection continuous bright heat treatment furnace, thermal treatment temp between 960-1010 ℃, soaking time 10-15 minute, back air cooling;
Control finished product cold rolling reduction is 60-65%, and subtracts wall thickness and the ratio Q that subtracts external diameter
E〉=1;
Vacuum finished product heat treatment furnace furnace temperature temperature deviation≤± 3 ℃, each position of product entered the time error of holding temperature less than 10 minutes; Described fine thin-wall seamless pipe wall thickness is 0.4mm;
Compared with prior art, the invention has the beneficial effects as follows: make the grain fineness number of product require to reach the 7-10.5 level, improve the anti-fatigue performance of pipe.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail:
The present invention realizes by following steps:
The last one work in-process solution treatment of finished product before cold rolling carried out in hydrogen protection continuous bright heat treatment furnace, thermal treatment temp between 960-1010 ℃, soaking time 10-15 minute, back air cooling;
Control finished product cold rolling reduction is 60-65%, and subtracts wall thickness and the ratio Q that subtracts external diameter
E〉=1;
Finished product vacuum heat treatment furnace furnace temperature temperature deviation≤± 3 ℃, each position of product entered the time error of holding temperature less than 10 minutes; Described fine thin-wall seamless pipe wall thickness is 0.4mm;
What adopt in the above-mentioned steps all is the equipment of prior art.
The finished product grain fineness number control of mentioning among the present invention is meant by control cold deformation and Q
EValue by optimizing heat treating regime and improving temperature uniformity, realizes satisfying the requirement of fine thin-wall seamless pipe grain fineness number.
Conventional GH3600 material solid solution temperature is 1050 ℃, and grain fineness number is in the 5-8 level, and individual die reaches 4 grades.After now last one work in-process reduce solid solution temperature, material is perfect recrystallization still, can guarantee the plasticity that the following process material is required, make material before final cold working, tentatively obtain tiny, uniform equiaxed grain structure simultaneously, be generally the 7-8 level, created precondition for realizing the finished product grain size number and crystal grain consistence;
Control the preceding cold rolling reduction 60-65% of final thermal treatment, subtract wall/tube reducing and compare Q
EValue 〉=1, the pipe outer layer metal is out of shape greatly when avoiding rolling, the situation that the internal layer distortion is little, the abundant distortion of whole wall thickness direction metal, crystal grain is fully broken, and internal stress size basically identical is avoided causing tube edges and inner grain size difference after thermal treatment because of being out of shape inequality; Simultaneously the 60-65% cold rolling reduction can realize that metal fully is out of shape, again the defective that can avoid the excessive deformation amount to cause pipe to crack with above-mentioned work in-process reduction solid solution temperature is corresponding together at last.
Finished products thermal treatment heating zone reaches 30, and each spacer segment only is 30cm, and the equal temperature control separately in each zone.Under the full load condition, longitudinal temperature deviation≤± 3 ℃, product entered the time error of holding temperature less than 10 minutes.Little temperature deviation and soaking time error have guaranteed that all pipes obtain the heat treating regime of basic identical condition.
Claims (1)
1. the manufacture method of a spaceflight high-temperature alloy GH 3600 fine thin-wall seamless pipe, realize by following steps:
The last one work in-process solution treatment of finished product before cold rolling carried out in hydrogen protection continuous bright heat treatment furnace, thermal treatment temp between 960-1010 ℃, soaking time 10-15 minute, back air cooling;
Control finished product cold rolling reduction is 60-65%, and subtracts wall thickness and the ratio Q that subtracts external diameter
E〉=1;
Vacuum finished product heat treatment furnace furnace temperature temperature deviation≤± 3 ℃, each position of product entered the time error of holding temperature less than 10 minutes; Described fine thin-wall seamless pipe wall thickness is 0.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102008445A CN101713019B (en) | 2008-10-07 | 2008-10-07 | Method for manufacturing spaceflight high-temperature alloy GH3600 fine thin-wall seamless pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102008445A CN101713019B (en) | 2008-10-07 | 2008-10-07 | Method for manufacturing spaceflight high-temperature alloy GH3600 fine thin-wall seamless pipe |
Publications (2)
| Publication Number | Publication Date |
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| CN101713019A CN101713019A (en) | 2010-05-26 |
| CN101713019B true CN101713019B (en) | 2011-05-04 |
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| CN2008102008445A Active CN101713019B (en) | 2008-10-07 | 2008-10-07 | Method for manufacturing spaceflight high-temperature alloy GH3600 fine thin-wall seamless pipe |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962411B (en) * | 2013-01-31 | 2016-01-06 | 宝钢特钢有限公司 | A kind of manufacture method of GH3600 alloy fine thin-wall seamless pipe |
| CN107142432A (en) * | 2017-03-24 | 2017-09-08 | 浙江久立特材科技股份有限公司 | A kind of seamless pipe high-yield-ratio control method of Hastelloy C alloys 276 |
| KR20200046021A (en) * | 2017-09-14 | 2020-05-06 | 산드빅 마테리알스 테크놀로지 도이칠란트 게엠베하 | Liquid hydrogen delivery system |
| CN115323163A (en) * | 2022-10-13 | 2022-11-11 | 江苏新恒基特种装备股份有限公司 | Austenitic stainless steel grain size control method, system and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594953A (en) * | 2004-07-13 | 2005-03-16 | 天津市天材科技发展有限公司 | Method for making ferrite stainless steel seamless pipes and cold working process thereof |
| CN1721128A (en) * | 2004-07-14 | 2006-01-18 | 天津市天材科技发展有限公司 | Cold working process for high Cr ferrite stainless steel seamless pipe |
| CN1721753A (en) * | 2004-07-14 | 2006-01-18 | 天津市天材科技发展有限公司 | Manufacturing method of ferritic stainless steel seamless pipe with small diameter |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594953A (en) * | 2004-07-13 | 2005-03-16 | 天津市天材科技发展有限公司 | Method for making ferrite stainless steel seamless pipes and cold working process thereof |
| CN1721128A (en) * | 2004-07-14 | 2006-01-18 | 天津市天材科技发展有限公司 | Cold working process for high Cr ferrite stainless steel seamless pipe |
| CN1721753A (en) * | 2004-07-14 | 2006-01-18 | 天津市天材科技发展有限公司 | Manufacturing method of ferritic stainless steel seamless pipe with small diameter |
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| CN101713019A (en) | 2010-05-26 |
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Address after: 201617 Songjiang District, Shanghai feldspar Road, No. 559 Patentee after: Shanghai high precision pipe Limited by Share Ltd Address before: 201617 Songjiang District, Shanghai feldspar Road, No. 559 Patentee before: Shanghai High-Thai Precious Metals Co., Ltd. |