CN103589837A - Stainless steel heat treatment process - Google Patents
Stainless steel heat treatment process Download PDFInfo
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- CN103589837A CN103589837A CN201310480762.1A CN201310480762A CN103589837A CN 103589837 A CN103589837 A CN 103589837A CN 201310480762 A CN201310480762 A CN 201310480762A CN 103589837 A CN103589837 A CN 103589837A
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Abstract
The invention discloses a stainless steel heat treatment process, which comprises the steps of blank inspection, degreasing, solid solution treatment, stabilization, distressing treatment, cooling, inspection and correction, quality inspection and delivery. The stainless steel heat treatment process is low in treatment expense, durable and high in treatment efficiency and high in quality of a workpiece.
Description
Technical field
The present invention relates to a kind of stainless steel hot treatment process, particularly a kind of stainless steel hot treatment process that improves art breading efficiency.
Background technology
Stainless-steel seamless pipe be a kind ofly there is hollow section, periphery does not have jointed rectangular steel.It is the steel pipe of the chemical etching dielectric corrosions such as the weak corrosive medium such as resistance to air, steam, water and acid, alkali, salt.Claim again Stainless Acid Resistant Steel pipe, along with the enforcement of China's policies of reform and opening to the outside world, national economy obtains rapid growth, and cities and towns house, public building and Tourist facilities are built in a large number, and hot water service and domestic water supply have been proposed to new requirement.Quality problem particularly, people more and more pay attention to, and require also to improve constantly.This conventional tubing of galvanized steel pipe, because of its susceptibility-to-corrosion, under the impact of national relevant policies, will step down from the stage of history gradually, and plastics tubing, multiple-unit tube and copper pipe have become the conventional tubing of tubing system.But in many cases, stainless steel tube more has superiority, particularly wall thickness be only the thin-wall stainless steel of 0.6～1.2mm in drink water system, hot-water system and water feeding system that safety, health are put in the first place, there is safe and reliable, hygienic environment-protecting, the feature such as economic and practical.By project practices at home and abroad, being proved one of water feeding system over-all properties tubing best, novel, energy-conservation and environment-friendly type, is also a kind of very competitive water-feeding pipes, will be to improving water quality, improve people's living standard and bring into play unrivaled effect.In building water supply piping, due to the galvanized steel pipe century-old brilliant history that has been through with, various novel plastics pipe and multiple-unit tube are developed rapidly, but various tubing also exists some shortcomings to some extent, far can not adapt to needs and the country requirement to tap water and relevant water quality of water supply piping completely.Therefore, relevant expert's prophesy: Building Supplies Water Pipe returns to the epoch of metal tube the most at last.According to external application experience, in metal tube, assert that thin-wall stainless steel is one of best tubing of over-all properties.
Austenitic stainless steel production technique is functional, and Chromiumnickel Austenite Stainless Steel particularly adopts the conventional means of producing special steel can successfully produce plate, pipe, band, silk, bar and forging and the foundry goods of various regular sizes.Due to alloying element (particularly chromium), content is high and carbon content is low, many employing electric arc furnace add argon oxygen decarburization (AOD) or vacuum deaeration decarburization (VOD) method is produced this class stainless steel in enormous quantities, be pilot for the senior trade mark can adopt vacuum or antivacuum non-induction furnace to smelt, add if desired esr, austenitic stainless steel concentrated nitric acid has good solidity to corrosion, low price, superior performance.Because austenitic stainless steel has comprehensive and good over-all properties, in all trades and professions, obtain a wide range of applications, this all makes traditional austenite stainless steel seamless steel tube cannot reach requirement, not only wastes resource and complex procedures.
Summary of the invention
The object of the present invention is to provide a kind of stainless steel hot treatment process, have that processing costs is low, durable, improved the quality of art breading efficiency and workpiece.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of stainless steel hot treatment process, is characterized in that: its processing step is as follows:
(1) blank inspection: workpiece is checked;
(2) degreasing: adopt water-base metal degreased cleaning agent to deoil to workpiece, until workpiece is infiltrated completely;
(3) solution treatment: shrend after steel is heated to 1050～1150 ℃, and this state is remained into room temperature;
(4) stabilization treatment: steel is heated to air cooling after 850～880 ℃ of insulations, now the carbide of Cr dissolves completely, de-and the carbide of titanium not exclusively dissolves, and fully separates out in process of cooling, make carbon can not form again the carbide of lattice, thereby effectively eliminated intergranular corrosion;
(5) destressing is processed: be heated to 300～350 ℃ of tempering, eliminate the thermal treatment of the unrelieved stress of steel after cold working or welding;
(6) cooling: with the water that is less than 80 ℃, to workpiece, to carry out cooling;
(7) testing and finishing: thickness, steel face smooth that guarantees workpiece surface steel layer;
(8) quality inspection is dispatched from the factory: by dispatching from the factory after quality-guarantee.
In a preferred embodiment of the present invention, described testing and finishing comprises table inspection, hydraulic pressure, eddy current test ET, UT (Ultrasonic Testing) UT, intergranular corrosion, grain fineness number, tensile test, flaring test, flattening, hardness, analysis of carbon and sulfur.
In a preferred embodiment of the present invention, described blank check comprises the check of size, surface, Chemical Composition and mechanical property etc.
In a preferred embodiment of the present invention, described water-base metal degreased cleaning agent comprises tensio-active agent, tripoly phosphate sodium STPP, fatty alcohol-polyoxyethylene ether and water glass.
In a preferred embodiment of the present invention, described water-base metal degreased cleaning agent, each composition weight proportion tensio-active agent is 20%, and tripoly phosphate sodium STPP is 50%, and fatty alcohol-polyoxyethylene ether is 5%, and water glass is 25%.
A kind of stainless steel hot treatment process of the present invention, has that processing costs is low, durable, has improved the quality of art breading efficiency and workpiece.
Accompanying drawing explanation
Fig. 1 is stainless steel hot treatment process block diagram in a preferred embodiment of the present invention.
Embodiment
Below be only the general introduction of technical solution of the present invention, in order to better understand technique means of the present invention, and can be implemented according to the content of specification sheets, below with a preferred embodiment and accompanying drawing, technical scheme of the present invention is further described.
Consult Fig. 1, this kind of stainless steel hot treatment process, is characterized in that: its processing step is as follows:
(1) blank inspection: workpiece is checked;
(2) degreasing: adopt water-base metal degreased cleaning agent to deoil to workpiece, until workpiece is infiltrated completely;
(3) solution treatment: shrend after steel is heated to 1050～1150 ℃, and this state is remained into room temperature;
(4) stabilization treatment: steel is heated to air cooling after 850～880 ℃ of insulations, now the carbide of Cr dissolves completely, de-and the carbide of titanium not exclusively dissolves, and fully separates out in process of cooling, make carbon can not form again the carbide of lattice, thereby effectively eliminated intergranular corrosion;
(5) destressing is processed: be heated to 300～350 ℃ of tempering, eliminate the thermal treatment of the unrelieved stress of steel after cold working or welding;
(6) cooling: with the water that is less than 80 ℃, to workpiece, to carry out cooling;
(7) testing and finishing: thickness, steel face smooth that guarantees workpiece surface steel layer;
(8) quality inspection is dispatched from the factory: by dispatching from the factory after quality-guarantee.
Further illustrate, this described testing and finishing comprises table inspection, hydraulic pressure, eddy current test ET, UT (Ultrasonic Testing) UT, intergranular corrosion, grain fineness number, tensile test, flaring test, flatten, hardness, analysis of carbon and sulfur, described blank check comprises size, surface, the check of Chemical Composition and mechanical property etc., described water-base metal degreased cleaning agent comprises tensio-active agent, tripoly phosphate sodium STPP, fatty alcohol-polyoxyethylene ether and water glass, described water-base metal degreased cleaning agent, each composition weight proportion tensio-active agent is 20%, tripoly phosphate sodium STPP is 50%, fatty alcohol-polyoxyethylene ether is 5%, water glass is 25%.
Further illustrating (1) solution treatment.Shrend after steel is heated to 1050～1150 ℃, main purpose is that carbide is dissolved in austenite, and this state is remained into room temperature, the solidity to corrosion of steel can be greatly improved like this.As mentioned above, in order to prevent that crystalline substance from asking corrosion, conventionally adopt solutionizing to process, Cr23C6 is dissolved in austenite, then cooling fast.For thin-wall part, can adopt air cooling, generalized case adopts water-cooled.(2) stabilization treatment.Generally to carry out after solution treatment, be usually used in the 18-8 steel containing Ti, Nb, Gu after processing, steel is heated to air cooling after 850～880 ℃ of insulations, now the carbide of Cr dissolves completely, de-and the carbide of titanium not exclusively dissolves, and fully separates out in process of cooling, make carbon can not form again the carbide of lattice, thereby effectively eliminated intergranular corrosion.(3) destressing is processed.It is that the thermal treatment process of eliminating the unrelieved stress of steel after cold working or welding is generally heated to 300～350 ℃ of tempering that destressing is processed.For not containing the steel of stabilizing element Ti, Nb, Heating temperature is no more than 450t, in order to avoid separate out the carbide of chromium, causes intergranular corrosion.For Ultra-low carbon with close the stainless cold working part of Ti, Nb and weldment, need be at 500～950 ℃, heating, then slow cooling, eliminate stress (eliminating welding stress capping temperature), can alleviate the stress corrosion resistance that steel was inclined to and improved in intergranular corrosion.A kind of stainless steel hot treatment process of the present invention, has that processing costs is low, durable, has improved the quality of art breading efficiency and workpiece.
The specific embodiment of the present invention; but protection scope of the present invention is not limited to this; any those of ordinary skill in the art are in the disclosed technical scope of the present invention, and the variation that can expect without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (5)
1. a hot dip galvanizing process method, is characterized in that: its processing step is as follows:
(1) blank inspection: workpiece is checked;
(2) degreasing: adopt water-base metal degreased cleaning agent to deoil to workpiece, until workpiece is infiltrated completely;
(3) solution treatment: shrend after steel is heated to 1050～1150 ℃, and this state is remained into room temperature;
(4) stabilization treatment: steel is heated to air cooling after 850～880 ℃ of insulations, now the carbide of Cr dissolves completely, de-and the carbide of titanium not exclusively dissolves, and fully separates out in process of cooling, make carbon can not form again the carbide of lattice, thereby effectively eliminated intergranular corrosion;
(5) destressing is processed: be heated to 300～350 ℃ of tempering, eliminate the thermal treatment of the unrelieved stress of steel after cold working or welding;
(6) cooling: with the water that is less than 80 ℃, to workpiece, to carry out cooling;
(7) testing and finishing: thickness, steel face smooth that guarantees workpiece surface steel layer;
(8) quality inspection is dispatched from the factory: by dispatching from the factory after quality-guarantee.
2. stainless steel hot treatment process according to claim 1, is characterized in that: described testing and finishing comprises table inspection, hydraulic pressure, eddy current test ET, UT (Ultrasonic Testing) UT, intergranular corrosion, grain fineness number, tensile test, flaring test, flattening, hardness, analysis of carbon and sulfur.
3. stainless steel hot treatment process according to claim 1, is characterized in that: described blank check comprises the check of size, surface, Chemical Composition and mechanical property etc.
4. stainless steel hot treatment process according to claim 1, is characterized in that: described water-base metal degreased cleaning agent comprises tensio-active agent, tripoly phosphate sodium STPP, fatty alcohol-polyoxyethylene ether and water glass.
5. stainless steel hot treatment process according to claim 4, is characterized in that: described water-base metal degreased cleaning agent, and each composition weight proportion tensio-active agent is 20%, and tripoly phosphate sodium STPP is 50%, and fatty alcohol-polyoxyethylene ether is 5%, and water glass is 25%.
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| CN201310480762.1A CN103589837A (en) | 2013-10-15 | 2013-10-15 | Stainless steel heat treatment process |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018699A (en) * | 2015-08-06 | 2015-11-04 | 无锡阳工机械制造有限公司 | Heat treatment technology for stainless steel |
| CN105018869A (en) * | 2015-08-06 | 2015-11-04 | 无锡阳工机械制造有限公司 | Heat treatment technology for aluminum product |
| CN105063304A (en) * | 2015-08-06 | 2015-11-18 | 无锡阳工机械制造有限公司 | Galvanized steel heat treatment process |
| CN105334795A (en) * | 2015-11-12 | 2016-02-17 | 成都九十度工业产品设计有限公司 | Intelligent preparation system and method of novel non-magnetic stainless steel |
| CN105331872A (en) * | 2015-11-12 | 2016-02-17 | 成都九十度工业产品设计有限公司 | Intelligent preparation method for novel non-magnetic stainless steel |
| CN105567029A (en) * | 2015-12-31 | 2016-05-11 | 芜湖市金宇石化设备有限公司 | Heat treatment fluid for heat treatment of automobile brake discs |
| CN106702121A (en) * | 2016-12-20 | 2017-05-24 | 合肥市瀚坤机械有限公司 | Heat treatment technology of portal frame |
| CN109913795A (en) * | 2019-04-17 | 2019-06-21 | 华能国际电力股份有限公司 | The effective austenitic heat-resistance steel of boiler and its surface chemical heat-treatment process |
| CN110306013A (en) * | 2019-05-14 | 2019-10-08 | 江苏绿叶锅炉有限公司 | A kind of 300 series austenitic stainless steels solid solution and stabilized heat treatment process |
| CN112662852A (en) * | 2020-12-04 | 2021-04-16 | 湖州中合鑫顺特钢股份有限公司 | Stainless steel heat treatment process |
| CN113351550A (en) * | 2021-06-24 | 2021-09-07 | 江阴瀚洲特钢有限公司 | Heat treatment process for component |
-
2013
- 2013-10-15 CN CN201310480762.1A patent/CN103589837A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018699A (en) * | 2015-08-06 | 2015-11-04 | 无锡阳工机械制造有限公司 | Heat treatment technology for stainless steel |
| CN105018869A (en) * | 2015-08-06 | 2015-11-04 | 无锡阳工机械制造有限公司 | Heat treatment technology for aluminum product |
| CN105063304A (en) * | 2015-08-06 | 2015-11-18 | 无锡阳工机械制造有限公司 | Galvanized steel heat treatment process |
| CN105334795A (en) * | 2015-11-12 | 2016-02-17 | 成都九十度工业产品设计有限公司 | Intelligent preparation system and method of novel non-magnetic stainless steel |
| CN105331872A (en) * | 2015-11-12 | 2016-02-17 | 成都九十度工业产品设计有限公司 | Intelligent preparation method for novel non-magnetic stainless steel |
| CN105334795B (en) * | 2015-11-12 | 2017-12-12 | 上海孚祥生态环保科技股份有限公司 | The intelligent preparation system and method for a kind of new magnetism-free stainless steel |
| CN105567029A (en) * | 2015-12-31 | 2016-05-11 | 芜湖市金宇石化设备有限公司 | Heat treatment fluid for heat treatment of automobile brake discs |
| CN106702121A (en) * | 2016-12-20 | 2017-05-24 | 合肥市瀚坤机械有限公司 | Heat treatment technology of portal frame |
| CN109913795A (en) * | 2019-04-17 | 2019-06-21 | 华能国际电力股份有限公司 | The effective austenitic heat-resistance steel of boiler and its surface chemical heat-treatment process |
| CN110306013A (en) * | 2019-05-14 | 2019-10-08 | 江苏绿叶锅炉有限公司 | A kind of 300 series austenitic stainless steels solid solution and stabilized heat treatment process |
| CN112662852A (en) * | 2020-12-04 | 2021-04-16 | 湖州中合鑫顺特钢股份有限公司 | Stainless steel heat treatment process |
| CN113351550A (en) * | 2021-06-24 | 2021-09-07 | 江阴瀚洲特钢有限公司 | Heat treatment process for component |
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