CN108148951A - Stainless steel hot treatment process - Google Patents
Stainless steel hot treatment process Download PDFInfo
- Publication number
- CN108148951A CN108148951A CN201611105112.9A CN201611105112A CN108148951A CN 108148951 A CN108148951 A CN 108148951A CN 201611105112 A CN201611105112 A CN 201611105112A CN 108148951 A CN108148951 A CN 108148951A
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- CN
- China
- Prior art keywords
- stainless steel
- water
- steel
- inspection
- workpiece
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
Abstract
The invention discloses a kind of stainless steel hot treatment process, including blank inspection → degreasing → solution treatment → stabilization processes → destressing processing → cooling → testing and finishing → quality inspection manufacture, the stainless steel hot treatment process of the present invention, with processing cost is low, durable, improves process efficiency and the quality of workpiece.
Description
Technical field
The present invention relates to a kind of stainless steel hot treatment process, more particularly to a kind of stainless steel for improving process efficiency
Heat treatment process.
Background technology
Stainless-steel seamless pipe is a kind of with hollow section, the non-jointed strip steel in periphery.It is resistance to air, steaming
The steel pipe of the chemical etchings dielectric corrosion such as the weak corrosive medium such as vapour, water and acid, alkali, salt.Also known as stainless acid resistant steel pipe, with me
The implementation of state's policies of reform and opening to the outside world, national economy obtain rapid growth, and town-property, public building and tourist facilities are largely emerging
It builds, new requirement is proposed to hot water supply and domestic water supply.Particularly quality problem, people increasingly pay attention to, it is desirable that
Also it is continuously improved.This common pipe materials of coating steel pipe under the influence of national relevant policies, will be gradually backed out because of its susceptibility-to-corrosion
The arena of history, plastic tube, multiple tube and copper pipe are into the common pipe materials of pipe-line system.But in many cases, stainless steel tube is more
There are superiority, particularly wall thickness to be only the thin-wall stainless steel of 0.6~1.2mm in good system about drinking water, hot-water heating system and incite somebody to action
Safety, the water supply system put in the first place of health, have the characteristics that securely and reliably, it is hygienic environment-protecting, economic and practical.By domestic and international work
Journey facts have proved be water supply system comprehensive performance is best, one of novel, energy saving and environment-friendly type tubing and it is a kind of have very much it is competing
The water-feeding pipes of power are striven, unrivaled effect will be played to improving water quality, improving people's living standard.In water supply pipe in building
In system, since coating steel pipe has finished on the history of century-old splendidness, various novel plastics pipes and it is compound be in control rapid development,
But various tubing are also to some extent there is some shortcomings, far from the complete needs for adapting to water supply piping and country to drinking
Water and the requirement in relation to water quality.Therefore, relevant expert foretells：Building Supplies Water Pipe is finally restored to the epoch of metal tube.
According to external application experience, one of thin-wall stainless steel tubing best for comprehensive performance is assert in metal tube.
Austenitic stainless steel production technology is functional, particularly chromiumnickel austenite stainless steel, using production special steel
Conventional means can successfully produce plate, pipe, band, silk, bar and the forging and casting of various regular sizes.Due to alloy
Content is high and carbon content is low for element (particularly chromium), mostly adds aod (AOD) or vacuum deaeration decarburization using electric arc furnaces
(VOD) method produces this kind of stainless steel in enormous quantities, and vacuum or antivacuum non-sense can be used for the be pilot of the advanced trade mark
Stove is answered to smelt, adds electroslag remelting when necessary, austenitic stainless steel concentrated nitric acid is with good corrosion resistance, cheap, performance is excellent
More.Since austenitic stainless steel has comprehensive and good comprehensive performance, had been widely used in all trades and professions, this
Traditional austenite stainless steel seamless steel tube is all made to be unable to reach requirement, not only waste of resource, but also complex procedures.
Invention content
The purpose of the present invention is to provide a kind of stainless steel hot treatment process, have low processing cost, durable, raising
The quality of process efficiency and workpiece.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of stainless steel hot treatment process, feature
It is：Its processing step is as follows：
(1) blank inspection：Workpiece is checked；
(2) degreasing：It is deoiled using water-base metal degreased cleaning agent to workpiece, until workpiece is completely by infiltration；
(3) solution treatment：Water quenching after steel is heated to 1050~1150 DEG C, and this state is remained into room temperature；
(4) stabilization processes：By steel be heated to 850~880 DEG C heat preservation after it is air-cooled, the carbide of Cr is completely dissolved at this time,
It takes off and the endless fully dissolved of the carbide of titanium, and is fully precipitated in cooling procedure, make carbon that can not possibly re-form the carbide of lattice, because
And effectively eliminate intercrystalline corrosion；
(5) destressing is handled：300~350 DEG C of tempering are heated to, eliminate residual stress of the steel after cold working or welding
Heat treatment；
(6) it cools down：Workpiece is cooled down with the water less than 80 DEG C；
(7) testing and finishing：Ensure the thickness of workpiece surface steel layer, steel face it is smooth；
(8) quality inspection is dispatched from the factory：By dispatching from the factory after quality assurance.
In a preferred embodiment of the present invention, the testing and finishing includes table inspection, hydraulic pressure, eddy current inspection ET, ultrasonic wave
Flaw detection UT, intercrystalline corrosion, grain size, pull test, flaring test, flattening, hardness, analysis of carbon and sulfur.
In a preferred embodiment of the present invention, the blank inspection includes size, surface, chemical analysis and mechanical property
Deng inspection.
In a preferred embodiment of the present invention, the water-base metal degreased cleaning agent includes surfactant, trimerization phosphorus
Sour sodium, fatty alcohol polyoxyethylene ether and sodium metasilicate.
In a preferred embodiment of the present invention, the water-base metal degreased cleaning agent, each Ingredients Weight are lived with specific surface
Property agent be 20%, sodium tripolyphosphate 50%, fatty alcohol polyoxyethylene ether 5%, sodium metasilicate 25%.
A kind of stainless steel hot treatment process of the present invention has low processing cost, durable, improves process effect
The quality of rate and workpiece.
Specific embodiment
It the above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, and can
It is implemented in accordance with the contents of the specification, technical scheme of the present invention is further described with a preferred embodiment below.
1, a kind of stainless steel hot treatment process, it is characterised in that：Its processing step is as follows：
(1) blank inspection：Workpiece is checked；
(2) degreasing：It is deoiled using water-base metal degreased cleaning agent to workpiece, until workpiece is completely by infiltration；
(3) solution treatment：Water quenching after steel is heated to 1050~1150 DEG C, and this state is remained into room temperature；
(4) stabilization processes：By steel be heated to 850~880 DEG C heat preservation after it is air-cooled, the carbide of Cr is completely dissolved at this time,
It takes off and the endless fully dissolved of the carbide of titanium, and is fully precipitated in cooling procedure, make carbon that can not possibly re-form the carbide of lattice, because
And effectively eliminate intercrystalline corrosion；
(5) destressing is handled：300~350 DEG C of tempering are heated to, eliminate residual stress of the steel after cold working or welding
Heat treatment；
(6) it cools down：Workpiece is cooled down with the water less than 80 DEG C；
(7) testing and finishing：Ensure the thickness of workpiece surface steel layer, steel face it is smooth；
(8) quality inspection is dispatched from the factory：By dispatching from the factory after quality assurance.
It further illustrates, this described testing and finishing includes table inspection, hydraulic pressure, eddy current inspection ET, ultrasonic examination UT, intergranular corruption
Erosion, grain size, pull test, flaring test, flattening, hardness, analysis of carbon and sulfur, the blank inspection include size, surface, chemistry
The inspection of composition and mechanical property etc., the water-base metal degreased cleaning agent include surfactant, sodium tripolyphosphate, fatty alcohol
Polyoxyethylene ether and sodium metasilicate, the water-base metal degreased cleaning agent, each Ingredients Weight proportioning surfactant is 20%, trimerization
Sodium phosphate is 50%, fatty alcohol polyoxyethylene ether 5%, sodium metasilicate 25%.
It is further illustrating, (1) solution treatment.Water quenching after steel is heated to 1050~1150 DEG C, main purpose are to make carbon
Compound is dissolved in austenite, and this state is remained into room temperature, and the corrosion resistance of such steel can be greatly improved.As described above, it is
Prevent crystalline substance from asking corrosion, generally use solutionizing processing makes Cr23C6 be dissolved in austenite, is then quickly cooled down.For thin-walled
Part can be used it is air-cooled, ordinary circumstance use water cooling.(2) stabilization processes.It is carried out usually after solution treatment, is usually used in containing
The 18-8 steel of Ti, Nb, Gu processing after, by steel be heated to 850~880 DEG C heat preservation after it is air-cooled, the carbide of Cr is completely dissolved at this time,
It takes off and the endless fully dissolved of the carbide of titanium, and is fully precipitated in cooling procedure, make carbon that can not possibly re-form the carbide of lattice, because
And effectively eliminate intercrystalline corrosion.(3) destressing is handled.Destressing processing is the remnants for eliminating steel after cold working or welding
The heat treatment process of stress is generally heated to 300~350 DEG C of tempering.For being free of the steel of stabilizing element Ti, Nb, heating temperature
No more than 450t, in order to avoid the carbide of chromium is precipitated and causes intercrystalline corrosion.Cold working for Ultra-low carbon and conjunction Ti, Nb stainless steel
Part and weldment need to heat, then slow cooling at 500~950 DEG C, eliminate stress (eliminate welding stress capping temperature), can be with
Mitigate intercrystalline corrosion to be inclined to and improve the stress corrosion resistance of steel.A kind of stainless steel hot treatment process of the present invention has processing
Expense is low, durable, improves process efficiency and the quality of workpiece.
The specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any to be familiar with this field
Technical staff disclosed herein technical scope in, changes or substitutions that can be made without creative work should all be contained
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be with protection model that claims are limited
Subject to enclosing.
Claims (5)
- A kind of 1. hot dip galvanizing process method, it is characterised in that：Its processing step is as follows：(1) blank inspection：Workpiece is checked；(2) degreasing：It is deoiled using water-base metal degreased cleaning agent to workpiece, until workpiece is completely by infiltration；(3) solution treatment：Water quenching after steel is heated to 1050~1150 DEG C, and this state is remained into room temperature；(4) stabilization processes：By steel be heated to 850~880 DEG C heat preservation after it is air-cooled, the carbide of Cr is completely dissolved at this time, take off and The endless fully dissolved of carbide of titanium, and be fully precipitated in cooling procedure, make carbon that can not possibly re-form the carbide of lattice, thus have Eliminate intercrystalline corrosion to effect；(5) destressing is handled：It is heated to 300~350 DEG C to be tempered, at the heat for eliminating residual stress of the steel after cold working or welding Reason；(6) it cools down：Workpiece is cooled down with the water less than 80 DEG C；(7) testing and finishing：Ensure the thickness of workpiece surface steel layer, steel face it is smooth；(8) quality inspection is dispatched from the factory：By dispatching from the factory after quality assurance.
- 2. stainless steel hot treatment process according to claim 1, it is characterised in that：The testing and finishing includes table inspection, water Pressure, eddy current inspection ET, ultrasonic examination UT, intercrystalline corrosion, grain size, pull test, flaring test, flattening, hardness, carbon sulphur content Analysis.
- 3. stainless steel hot treatment process according to claim 1, it is characterised in that：The blank inspection includes size, table The inspection of face, chemical analysis and mechanical property etc..
- 4. stainless steel hot treatment process according to claim 1, it is characterised in that：The water-base metal degreased cleaning agent packet Include surfactant, sodium tripolyphosphate, fatty alcohol polyoxyethylene ether and sodium metasilicate.
- 5. stainless steel hot treatment process according to claim 4, it is characterised in that：The water-base metal degreased cleaning agent, Each Ingredients Weight proportioning surfactant is 20%, sodium tripolyphosphate 50%, fatty alcohol polyoxyethylene ether 5%, sodium metasilicate It is 25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105112.9A CN108148951A (en) | 2016-12-05 | 2016-12-05 | Stainless steel hot treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105112.9A CN108148951A (en) | 2016-12-05 | 2016-12-05 | Stainless steel hot treatment process |
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| Publication Number | Publication Date |
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| CN108148951A true CN108148951A (en) | 2018-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611105112.9A Pending CN108148951A (en) | 2016-12-05 | 2016-12-05 | Stainless steel hot treatment process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2016
- 2016-12-05 CN CN201611105112.9A patent/CN108148951A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| PB01 | Publication | ||
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Application publication date: 20180612 |