CN102925653A - Technology for processing high-precision stainless steel seamless pipe through solution heat treatment - Google Patents
Technology for processing high-precision stainless steel seamless pipe through solution heat treatment Download PDFInfo
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- CN102925653A CN102925653A CN2012104117636A CN201210411763A CN102925653A CN 102925653 A CN102925653 A CN 102925653A CN 2012104117636 A CN2012104117636 A CN 2012104117636A CN 201210411763 A CN201210411763 A CN 201210411763A CN 102925653 A CN102925653 A CN 102925653A
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- heat treatment
- solution heat
- seamless pipe
- steel seamless
- temperature
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Abstract
The invention provides a technology for processing a high-precision stainless steel seamless pipe through solution heat treatment. The technology comprises the following steps: (1) heat treatment technological parameters are stored in a computer in advance and correspond to the material, external diameter, wall thickness, finished product or semi-finished product of the high-precision stainless steel seamless pipe; (2) the heat treatment technological parameters which correspond to the high-precision stainless steel seamless pipe to be processed are taken from the computer; and (3) according to the heat treatment technological parameters, a closed-loop control system is adopted to carry out the solution heat treatment, wherein the solution heat treatment temperature is controlled between 1100 DEG C and 1150 DEG C, the temperature fluctuation of a same temperature measurement point is smaller than or equal to plus or minus 1 DEG C, and the temperature difference of a same temperature heating section is smaller than or equal to plus or minus 5 DEG C. By the technology for processing, the mechanical property of the high-precision stainless steel seamless pipe can be improved, the yield point can be improved by 30-40 megapascals, the tensile strength can be improved by 50-60 megapascals, and percentage elongation can be increased to 45%-60%.
Description
Technical field
The invention belongs to Field of Heat-treatment, be specifically related to a kind of solution heat treatment complete processing of high-accuracy stainless-steel seamless pipe.
Background technology
At present, the manufacturing process of conventional stainless-steel seamless pipe is more coarse, only purchasing on request the weldless steel tube that the stainless steel tube of coming simply is processed into required specification, manufacturing process is not smart, production technology content is not high, and especially the natural condition of heat treatment furnace and thermal treatment process are also not accurately controlled the mechanical property of material, and quality product is bad, it is inadequate to bear pressure, and mechanical property does not reach the requirement of high pressure boiler tube.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of solution heat treatment complete processing that improves the high-accuracy stainless-steel seamless pipe of material mechanical performance is provided.
The present invention is achieved through the following technical solutions:
A kind of solution heat treatment complete processing of high-accuracy stainless-steel seamless pipe may further comprise the steps:
(1) pre-stored heat treatment process parameter in computer, described heat treatment process parameter is corresponding with material, external diameter, wall thickness, finished product or the work in-process of stainless-steel seamless pipe;
(2) in computer, transfer with stainless-steel seamless pipe to be processed to corresponding heat treatment parameter;
(3) according to described heat treatment parameter, adopt closed loop control system to carry out solution heat treatment processing; The control solution heat treatment temperature is 1100 ℃-1150 ℃, and same point for measuring temperature temperature fluctuation is less than or equal to ± 1 ℃, and same temperature heating zone temperature head is less than or equal to ± 5 ℃.
The further setting of the present invention is, carries out being provided with a plurality of thermo detectors in the stove case of solution heat treatment processing.
The further setting of the present invention is that described solution heat treatment processing is carried out under the shielding gas atmosphere.
The further setting of the present invention is that described shielding gas is argon gas.
The solution heat treatment complete processing of high-accuracy stainless-steel seamless pipe of the present invention is mainly used in overcritical station boiler generating set, superheater, heat exchanger stainless-steel seamless pipe, nuclear power generating sets stainless-steel seamless pipe.The present invention has increased computer centralized distribution formula Controlling System, material, external diameter, wall thickness, finished product or work in-process by steel pipe are listed corresponding heat treatment process parameter, and in the input computer, during Deng needs thermal treatment solid solution, transfer corresponding heat treatment parameter, adopt closed loop control system, designed stainless-steel seamless pipe Solution Treatment Furnace automatic temperature control system, realized the reliable control of solution treatment furnace temperature.Such complete processing makes the mechanical property of stainless-steel seamless pipe that large increase arranged, and yield-point can improve 30-40Mpa, and tensile strength can improve 50--60Mpa, and unit elongation rises to 45%-60%.
Embodiment
The present invention will be further described in detail below in conjunction with embodiment.
Embodiment one:
A kind of solution heat treatment complete processing of high-accuracy stainless-steel seamless pipe may further comprise the steps:
(1) pre-stored heat treatment process parameter in computer, described heat treatment process parameter is corresponding with material, external diameter, wall thickness, finished product or the work in-process of stainless-steel seamless pipe;
(2) in computer, transfer with stainless-steel seamless pipe to be processed to corresponding heat treatment parameter;
(3) according to described heat treatment parameter, adopt closed loop control system to carry out solution heat treatment processing; The control solution heat treatment temperature is 1100 ℃ ℃, and same point for measuring temperature temperature fluctuation equals 1 ℃, and same temperature heating zone temperature is worse than and equals 5 ℃.
Embodiment two:
A kind of solution heat treatment complete processing of high-accuracy stainless-steel seamless pipe may further comprise the steps:
(1) pre-stored heat treatment process parameter in computer, described heat treatment process parameter is corresponding with material, external diameter, wall thickness, finished product or the work in-process of stainless-steel seamless pipe;
(2) in computer, transfer with stainless-steel seamless pipe to be processed to corresponding heat treatment parameter;
(3) according to described heat treatment parameter, adopt closed loop control system to carry out solution heat treatment processing; The control solution heat treatment temperature is 1150 ℃, and same point for measuring temperature temperature fluctuation equals-1 ℃, and same temperature heating zone temperature head equals-5 ℃.
Embodiment three:
A kind of solution heat treatment complete processing of high-accuracy stainless-steel seamless pipe may further comprise the steps:
(1) pre-stored heat treatment process parameter in computer, described heat treatment process parameter is corresponding with material, external diameter, wall thickness, finished product or the work in-process of stainless-steel seamless pipe;
(2) in computer, transfer with stainless-steel seamless pipe to be processed to corresponding heat treatment parameter;
(3) according to described heat treatment parameter, adopt closed loop control system to carry out solution heat treatment processing; The control solution heat treatment temperature is 1120 ℃, and same point for measuring temperature temperature fluctuation equals 0.5 ℃, and same temperature heating zone temperature head equals 2 ℃.
The above is preferred embodiment of the present invention, and all equivalent variations of doing according to the present patent application claim all should belong to protection scope of the present invention.
Claims (4)
1. the solution heat treatment complete processing of a high-accuracy stainless-steel seamless pipe is characterized in that, may further comprise the steps:
(1) pre-stored heat treatment process parameter in computer, described heat treatment process parameter is corresponding with material, external diameter, wall thickness, finished product or the work in-process of stainless-steel seamless pipe;
(2) in computer, transfer with stainless-steel seamless pipe to be processed to corresponding heat treatment parameter;
(3) according to described heat treatment parameter, adopt closed loop control system to carry out solution heat treatment processing; The control solution heat treatment temperature is 1100 ℃-1150 ℃, and same point for measuring temperature temperature fluctuation is less than or equal to ± 1 ℃, and same temperature heating zone temperature head is less than or equal to ± 5 ℃.
2. solution heat treatment complete processing according to claim 1 is characterized in that, carries out being provided with a plurality of thermo detectors in the stove case of solution heat treatment processing.
3. solution heat treatment complete processing according to claim 1 is characterized in that, described solution heat treatment processing is carried out under the shielding gas atmosphere.
4. solution heat treatment complete processing according to claim 3 is characterized in that, described shielding gas is argon gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104117636A CN102925653A (en) | 2012-10-24 | 2012-10-24 | Technology for processing high-precision stainless steel seamless pipe through solution heat treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104117636A CN102925653A (en) | 2012-10-24 | 2012-10-24 | Technology for processing high-precision stainless steel seamless pipe through solution heat treatment |
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| CN102925653A true CN102925653A (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104117636A Pending CN102925653A (en) | 2012-10-24 | 2012-10-24 | Technology for processing high-precision stainless steel seamless pipe through solution heat treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103740900A (en) * | 2013-11-30 | 2014-04-23 | 常熟市东鑫钢管有限公司 | Heat treatment technology for seamless steel pipes |
| CN105750706A (en) * | 2014-12-19 | 2016-07-13 | 上海凯泉泵业（集团）有限公司 | Super austenitic stainless steel welding technology and subsequent heat treatment process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665891A (en) * | 2009-08-29 | 2010-03-10 | 浙江久立特材科技股份有限公司 | Stainless heat-resistant alloy steel seamless steel tube and preparation method thereof |
-
2012
- 2012-10-24 CN CN2012104117636A patent/CN102925653A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665891A (en) * | 2009-08-29 | 2010-03-10 | 浙江久立特材科技股份有限公司 | Stainless heat-resistant alloy steel seamless steel tube and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103740900A (en) * | 2013-11-30 | 2014-04-23 | 常熟市东鑫钢管有限公司 | Heat treatment technology for seamless steel pipes |
| CN105750706A (en) * | 2014-12-19 | 2016-07-13 | 上海凯泉泵业（集团）有限公司 | Super austenitic stainless steel welding technology and subsequent heat treatment process thereof |
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Application publication date: 20130213 |