CN104214392B - A kind of production method of large-scale acidproof valve body - Google Patents
A kind of production method of large-scale acidproof valve body Download PDFInfo
- Publication number
- CN104214392B CN104214392B CN201410424256.5A CN201410424256A CN104214392B CN 104214392 B CN104214392 B CN 104214392B CN 201410424256 A CN201410424256 A CN 201410424256A CN 104214392 B CN104214392 B CN 104214392B
- Authority
- CN
- China
- Prior art keywords
- valve body
- less
- equal
- temperature
- acidproof
- Prior art date
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- 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
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
Abstract
The invention discloses a kind of production method of large-scale acidproof valve body, it is mainly included the following steps that successively：Casting, heating, die forging, heat treatment；In casting, each chemical element percentage by weight is as follows in molten iron：Carbon：0.08~0.15%；Silicon：Less than or equal to 1%；Manganese：Less than or equal to 1%；Chromium：11.5~13.5%；Phosphorus：Less than or equal to 0.025%；Molybdenum：Less than or equal to 0.6%；Sulphur：Less than or equal to 0.025%；Nickel：Less than or equal to 0.5%；Remaining as iron and inevitable impurity, the impurity content is less than 0.01%.Constitutive material formula of the present invention is reasonable, and alloy has improved highly-acidproof, elevated temperature strength, is suitably applied the valve that highly acid occasion uses, the service life length of valve, qualification rate is high, substantially increases the quality of product, is adapted to be widely popularized.
Description
Technical field
The present invention relates to a kind of production method of large-scale acidproof valve body.
Background technology
Check-valves be useful in -50~150 DEG C of various concentration chloroazotic acid, sulfuric acid, hydrochloric acid, hydrofluoric acid and various organic acids,
Strong acid, strong oxidizer, apply also for the highly basic organic solvent of various concentration and other corrosive gas, the pipeline of liquid medium
Upper use.In general material, acid resistance is good, and intensity is not high；Intensity is high, processing characteristics and acid resistance but it is poor.It is suitable
The requirement of particular job environment and high-pressure delivery is answered, the decay resistance and intensity to valve body material put forward higher requirement.
The content of the invention
It is an object of the invention to provide a kind of production method of large-scale acidproof valve body.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of production method of large-scale acidproof valve body,
It comprises the following steps successively：Casting, raw material reinspection, ultrasound detection, blanking, heating, die forging, heat treatment, ball blast, polishing,
Magnetic testing, heat treatment, performance test, ball blast, Magnetic testing, roughing, hardness test, ultrasound detection, ball blast, typewriting, bag
Dress, each chemical element percentage by weight is as follows in molten iron during casting：
Carbon：0.08~0.15%；Silicon：Less than or equal to 1%；Manganese：Less than or equal to 1%；Chromium：11.5~13.5%；Phosphorus：It is less than or equal to
0.025%；Molybdenum：Less than or equal to 0.6%；Sulphur：Less than or equal to 0.025%；Nickel：Less than or equal to 0.5%；Remaining as iron and unavoidably
Impurity, the impurity content be less than 0.01%.
Optimization, the length of valve body is D, a diameter of Φ, and in heating stepses, as length≤950mm of material, valve body is endways
Dress, but interval cannot be less than 80mm between valve body and valve body, valve body and furnace wall, and gap should uniformly be put between valve body and valve body；
As the length ＞ 950mm of valve body, in order to avoid flame is injected directly on raw material, raw material are placed in nozzle direct projection direction
When, former material discharge position is from cannot be less than 1 meter with a distance from nozzle.
Optimization, the length of valve body is D, a diameter of Φ, and in heating stepses, valve body heats up with stove, charging temperature≤600
DEG C, as Φ≤280mm, furnace temperature is first maintained at 850~860 DEG C, high-temperature holding time 0.6min/mm, then again with stove
1150~1160 DEG C are warming up to, high-temperature holding time is 0.6min/mm ± 60min；As 280mm ＜ Φ, furnace temperature is first maintained at
850~860 DEG C, high-temperature holding time 0.6min/mm, then 1170~1180 DEG C are warming up to stove again, during soak
Between be 0.6min/mm ± 60min.
Optimization, the forging die process includes removing that valve body blank end face oxide skin, jumping-up or card are pressed, to be put into die cavity light again
Hit 4~5 hammers, valve body blank removes, removes valve body blank surface and die cavity oxide skin, lubricated dies die cavity, puts valve body blank
Enter and be molded in finish-forging die cavity.
Optimization, initial forging temperature：1030~1100 DEG C；Final forging temperature is more than or equal to 850 DEG C.
Further, step heat treatment includes austenitizing, once quenching, tempering, double tempering, the austenitizing
Medium be air or nitrogen, austenitizing temperature be more than or equal to 927 DEG C, soaking time T >=0.5 hour/inch, T is not small
In 1, inch value takes valve body thickest.
Further, the medium of quenching is water, water temperature≤38 DEG C before quenching, water temperature≤49 DEG C after quenching.
Further, the medium being once tempered is the mixed gas of air and nitrogen, temperature be more than or equal to
677 DEG C, soaking time T >=0.75 hour/inch, T is not less than 1, and inch value takes valve body thickest.
Further, after being once tempered, valve body carries out double tempering, the medium of the double tempering after being cooled to room temperature
For the mixed gas of air and nitrogen, temperature is more than or equal to 649 DEG C, and soaking time T >=0.75 hour/inch, T is not less than
1, inch value takes valve body thickest.
Further, double tempering temperature is less than Tempering temperature.
The beneficial effects of the present invention are：Constitutive material formula of the present invention is reasonable, and alloy has improved highly-acidproof, height
Warm intensity, the valve that highly acid occasion uses is suitably applied, the service life length of valve, qualification rate is high, substantially increases production
The quality of product, it is adapted to be widely popularized.
Brief description of the drawings
Accompanying drawing 1 is the front view of valve body in the present invention；
Accompanying drawing 2 is the top view of valve body in the present invention.
Embodiment
The present invention is described in detail below below：
The production method of this large-scale acidproof valve body, it comprises the following steps successively：A kind of producer of large-scale acidproof valve body
Method, it comprises the following steps successively：Casting, raw material reinspection, ultrasound detection, blanking, heating, die forging, heat treatment, ball blast, beat
Mill, Magnetic testing, heat treatment, performance test, ball blast, Magnetic testing, roughing, hardness test, ultrasound detection, ball blast, typewriting,
Packaging.
Each chemical element percentage by weight is as follows in molten iron during casting：
Carbon：0.08~0.15%；Silicon：Less than or equal to 1%；Manganese：Less than or equal to 1%；Chromium：11.5~13.5%；Phosphorus：It is less than or equal to
0.025%；Molybdenum：Less than or equal to 0.6%；Sulphur：Less than or equal to 0.025%；Nickel：Less than or equal to 0.5%；Remaining as iron and unavoidably
Impurity, the impurity content be less than 0.01%.
Three kinds of classical proportionings are as follows：
One
Carbon：0.08%；Silicon：0.1%；Manganese：0.1%；Chromium：11.5%；Phosphorus：0.01%；Molybdenum：0.1%；Sulphur： 0.01%；Nickel：0.1%；
Remaining as iron and inevitable impurity, the impurity content is less than 0.01%；
Two
Carbon：0.18%；Silicon：0.5%；Manganese：0.5%；Chromium：12.5%；Phosphorus：0.015%；Molybdenum：0.15%；Sulphur：0.01%；Nickel：
0.4%；Remaining as iron and inevitable impurity, the impurity content is less than 0.01%；
Three
Carbon：0.15%；Silicon：1%；Manganese：1%；Chromium：13.5%；Phosphorus：0.025%；Molybdenum：0.6%；Sulphur：0.025%；Nickel：0.5%；It is surplus
Yu Weitie and inevitable impurity, the impurity content are less than 0.01%；
The length of valve body is D, a diameter of Φ, in heating stepses, as length≤950mm of material, and valve body is endways dress, but valve
Interval cannot be less than 80mm between body and valve body, valve body and furnace wall, and gap should uniformly be put between valve body and valve body；When valve body
During length ＞ 950mm, in order to avoid flame is injected directly on raw material, when placing raw material in nozzle direct projection direction, former material
Discharge position is from cannot be less than 1 meter with a distance from nozzle.The length of valve body is D, a diameter of Φ, and in heating stepses, valve body heats up with stove,
Charging temperature≤600 DEG C, as Φ≤280mm, furnace temperature is first maintained at 850~860 DEG C, high-temperature holding time 0.6min/mm,
1150~1160 DEG C then are warming up to stove again, high-temperature holding time is 0.6min/mm ± 60min；As 280mm ＜ Φ,
Furnace temperature is first maintained at 850~860 DEG C, high-temperature holding time 0.6min/mm, is then warming up to 1170~1180 with stove again
DEG C, high-temperature holding time is 0.6min/mm ± 60min.
Forging die process includes removing valve body blank end face oxide skin, jumping-up or card pressure, is put into the hammer of die cavity touch 2~3, valve again
Body blank removes, removes valve body blank surface and die cavity oxide skin, lubricated dies die cavity, valve body blank is put into finish-forging die cavity
Shaping.Wherein it should be noted that：Initial forging temperature：1030~1100 DEG C；Final forging temperature is more than or equal to 850 DEG C；When forging die preheats
Between require insulation more than 6 hours；Forging should be removed again before the forging final molding and confirm forging surface non-oxidation
Skin exist and confirm forging die beaten lean on, forging is full of；Above touch forges（4~5 hammers）, remove forging after positioning and blow off oxygen
Change in skin production process, the temperature variations of valve body neck location will be observed by applying hammer personnel, and neck location temperature, which rises, not to be surpassed
Crossing 50 DEG C of this body temperature is advisable, more than when to control hammer strike weight and forging strike beat；Saw is uninterruptedly spread in forging process
End and blow oxide skin；Cooling in time and lubricated dies die cavity after per complete one of finish-forging, so as to ensure product quality.
Heat treatment includes austenitizing, once quenching, tempering, double tempering.The medium of the austenitizing be air or
Nitrogen, austenitizing temperature be more than or equal to 927 DEG C, soaking time T >=0.5 hour/inch, T is not less than 1, and inch value takes
Valve body thickest；The medium of quenching is water, water temperature≤38 DEG C before quenching, water temperature≤49 DEG C after quenching；It is described to be once tempered
Medium is the mixed gas of air and nitrogen, temperature be more than or equal to 677 DEG C, soaking time T >=0.75 hour/inch, T
Not less than 1, inch value takes valve body thickest；After being once tempered, valve body, which is cooled to after room temperature, carries out double tempering, and described two
The medium of secondary tempering is the mixed gas of air and nitrogen, and temperature is more than or equal to 649 DEG C, soaking time T >=0.75 hour/
Inch, T are not less than 1, and inch value takes valve body thickest, and double tempering temperature is less than Tempering temperature.
By aforementioned production method, obtained valve body performance table is as follows：
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention
The equivalent change or modification that spirit is made, should all be included within the scope of the present invention.
Claims (8)
1. a kind of production method of large-scale acidproof valve body, it is characterised in that it comprises the following steps successively：Casting, raw material are multiple
Inspection, ultrasound detection, blanking, heating, die forging, heat treatment, ball blast, polishing, Magnetic testing, heat treatment, performance test, ball blast, magnetic
Powder detection, roughing, hardness test, ultrasound detection, ball blast, typewriting, packaging, initial forging temperature：1030~1100 DEG C；Final forging temperature
More than or equal to 850 DEG C, the length of valve body is D, a diameter of Φ, and in heating stepses, valve body heats up with stove, charging temperature≤600 DEG C,
As Φ≤280mm, furnace temperature is first maintained at 850~860 DEG C, high-temperature holding time 0.6min/mm, is then heated up again with stove
To 1150~1160 DEG C, high-temperature holding time is 0.6min/mm ± 60min；As 280mm ＜ Φ, furnace temperature is first maintained at 850~
860 DEG C, high-temperature holding time 0.6min/mm, 1170~1180 DEG C then are warming up to stove again, high-temperature holding time is
0.6min/mm ± 60min, each chemical element percentage by weight is as follows in molten iron during casting：
Carbon：0.08~0.15%；Silicon：Less than or equal to 1%；Manganese：Less than or equal to 1%；Chromium：11.5~13.5%；Phosphorus：It is less than or equal to
0.025%；Molybdenum：Less than or equal to 0.6%；Sulphur：Less than or equal to 0.025%；Nickel：Less than or equal to 0.5%；Remaining as iron and unavoidably
Impurity, the impurity content be less than 0.01%.
2. the production method of large-scale acidproof valve body according to claim 1, it is characterised in that：The length of valve body is D, diameter
For Φ, in heating stepses, as length≤950mm of material, valve body is endways dress, but between valve body and valve body, valve body and furnace wall between
Every cannot be less than 80mm, gap should uniformly be put between valve body and valve body；As the length ＞ 950mm of valve body, in order to avoid fire
Flame is injected directly on raw material, and when placing raw material in nozzle direct projection direction, former material discharge position must not be small from a distance from nozzle
In 1 meter.
3. the production method of large-scale acidproof valve body according to claim 1, it is characterised in that：The die forging process includes again
Removing valve body blank end face oxide skin, jumping-up or card pressure, it is put into the hammer of die cavity touch 4~5, the removal of valve body blank, removes valve body base
Material surface and die cavity oxide skin, lubricated dies die cavity, valve body blank is put into finish-forging die cavity be molded.
4. the production method of large-scale acidproof valve body according to claim 1, it is characterised in that：Step heat treatment includes Ovshinsky
Body, once quenching, tempering, double tempering, the medium of the austenitizing is air or nitrogen, and austenitizing temperature is big
In equal to 927 DEG C, soaking time T >=0.5 hour/inch, T is not less than 1, and inch value takes valve body thickest.
5. the production method of large-scale acidproof valve body according to claim 4, it is characterised in that：The medium of quenching is water, is quenched
Water temperature≤38 DEG C before fire, water temperature≤49 DEG C after quenching.
6. the production method of large-scale acidproof valve body according to claim 4, it is characterised in that：The medium being once tempered
For the mixed gas of air and nitrogen, temperature be more than or equal to 677 DEG C, soaking time T >=0.75 hour/inch, T is not small
In 1, inch value takes valve body thickest.
7. the production method of large-scale acidproof valve body according to claim 4, it is characterised in that：After being once tempered, valve body
Double tempering is carried out after being cooled to room temperature, the medium of the double tempering is the mixed gas of air and nitrogen, and temperature is big
In equal to 649 DEG C, soaking time T >=0.75 hour/inch, T is not less than 1, and inch value takes valve body thickest.
8. the production method of large-scale acidproof valve body according to claim 5, it is characterised in that：Double tempering temperature is less than one
Secondary temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424256.5A CN104214392B (en) | 2014-08-26 | 2014-08-26 | A kind of production method of large-scale acidproof valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424256.5A CN104214392B (en) | 2014-08-26 | 2014-08-26 | A kind of production method of large-scale acidproof valve body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104214392A CN104214392A (en) | 2014-12-17 |
| CN104214392B true CN104214392B (en) | 2017-12-26 |
Family
ID=52096165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410424256.5A Active CN104214392B (en) | 2014-08-26 | 2014-08-26 | A kind of production method of large-scale acidproof valve body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104214392B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846288B (en) * | 2015-04-22 | 2017-05-17 | 苏州统明机械有限公司 | Manufacturing process of light oil hydraulic cylinder supporting seat |
| CN106678408A (en) * | 2016-12-20 | 2017-05-17 | 铜陵市经纬流体科技有限公司 | Check valve body suitable for acid solutions |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000240890A (en) * | 1999-02-23 | 2000-09-08 | Kubota Corp | Heat reserving structure of pipe facility for high temperature gas |
| CN102994864A (en) * | 2011-09-13 | 2013-03-27 | 王春晖 | Liquid caustic soda nickel-containing ductile iron valve material |
| CN103014526A (en) * | 2011-09-27 | 2013-04-03 | 宝山钢铁股份有限公司 | Martensitic stainless steel for valve and manufacturing method thereof |
| CN103071753B (en) * | 2012-08-22 | 2015-01-07 | 昌利锻造有限公司 | Forging method of ball valve stem |
| CN102936680A (en) * | 2012-09-11 | 2013-02-20 | 青岛和德隆机械有限公司 | Raw material composition of high performance sewage discharge valve cast, and production method thereof |
| CN103060666A (en) * | 2012-11-13 | 2013-04-24 | 安徽春辉仪表线缆集团有限公司 | Casting method of alloy body of spherical check valve |
| CN102978486A (en) * | 2012-11-13 | 2013-03-20 | 安徽春辉仪表线缆集团有限公司 | Aluminum alloy casting forming method for valve clack of sluice valve |
-
2014
- 2014-08-26 CN CN201410424256.5A patent/CN104214392B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104214392A (en) | 2014-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106282836B (en) | Steam turbine 2Cr11MoVNbN forging and its manufacturing method | |
| CN104213036B (en) | A kind of production method of the low-alloy valve body suitable under acid operating mode | |
| CN102876859B (en) | Spheroidizing annealing process of screw wire rod | |
| CN103934642B (en) | A kind of steel cold-extrusion technology | |
| CN102994710A (en) | Spheroidizing annealing process of superplasticity fastener wire rod | |
| CN106399860A (en) | Producing and manufacturing method for 1Cr17Ni2 piston rod forged piece | |
| CN105331901A (en) | S22253 duplex stainless steel material flange and production process thereof | |
| CN104175063A (en) | All-fiber-texture large-size one-piece flange fan main shaft forging method | |
| CN103602797B (en) | High rigidity steel wire cut pill thermal treatment process | |
| CN104846175A (en) | Low-temperature high-product-of-strength-and-elongation high manganese steel plate and processing technology thereof | |
| CN104214392B (en) | A kind of production method of large-scale acidproof valve body | |
| CN108441613B (en) | A kind of anti-white point control method of age-hardening plastic mould steel | |
| CN106906340A (en) | A kind of fine grain heat treatment method | |
| CN102010973A (en) | Simple method for deformation control during carburizing and quenching of large-diameter heavy-duty gears | |
| CN101906518B (en) | Post-forging heat treatment process for nickeliferous dilute alloy round steel | |
| CN103993140A (en) | Spheroidizing annealing technology of low-hardness fastener wires | |
| CN101367605B (en) | Tempering processing method for 3.2mm tempered glass | |
| CN107716840B (en) | Production process of ring forging | |
| CN109942187A (en) | A kind of resistance to temperature difference glass and its preparation process | |
| CN111451425B (en) | Forging method for controlling white point defect | |
| CN107245565A (en) | The stress relief annealing method of the effective steel continuous casting round bloom of high-pressure boiler | |
| CN105886706A (en) | Heat treatment technology for stainless steel workpieces | |
| CN105274297B (en) | Domestic GMH20 mould steel vacuum heat treatment process | |
| CN110306014A (en) | A kind of electric motor shaft forgeable piece normalizing and tempering process | |
| CN104073614A (en) | Production process of specially-shaped steel wires |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215233 longjiangqiao village, Zhenze Town, Wujiang District, Suzhou City, Jiangsu Province Patentee after: Jiangsu Fujie high end equipment manufacturing (Group) Co.,Ltd. Address before: 215233 longjiangqiao village, Zhenze Town, Wujiang District, Suzhou City, Jiangsu Province Patentee before: SUZHOU FUJIE MACHINERY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |