CN104214392A - Production method of large-sized acid-resistant valve body - Google Patents
Production method of large-sized acid-resistant valve body Download PDFInfo
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- CN104214392A CN104214392A CN201410424256.5A CN201410424256A CN104214392A CN 104214392 A CN104214392 A CN 104214392A CN 201410424256 A CN201410424256 A CN 201410424256A CN 104214392 A CN104214392 A CN 104214392A
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- valve body
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a production method of a large-sized acid-resistant valve body. The production method mainly comprises the steps of casting, heating, die forging and thermal treatment in sequence. During casting, molten iron comprises the following chemical elements in percentage by weight: 0.08-0.15 percent of carbon, less than or equal to 1 percent of silicon, less than or equal to 1 percent of manganese, 11.5-13.5 percent of chromium, less than or equal to 0.025 percent of phosphorus, less than or equal to 0.6 percent of molybdenum, less than or equal to 0.025 percent of sulfur, less than or equal to 0.5 percent of nickel and the balance of iron and inevitable impurities, wherein the content of the impurities is less than 0.01. A constituting raw material formula is reasonable, an alloy has improved high acid resistance and high temperature strength and is suitable to be applied to a valve used on a strongly-acid occasion, the service life of the valve is long, the yield is high, and the quality of a product is greatly enhanced; the production method is suitable for wide popularization.
Description
Technical field
The present invention relates to a kind of production method of large-scale acidproof valve body.
Background technique
Safety check is useful in the chloroazotic acid of the various concentration of-50 ~ 150 DEG C, sulfuric acid, hydrochloric acid, hydrofluoric acid and various organic acid, strong acid, strong oxidizer, is also applicable to highly basic organic solvent and other corrosive gas of various concentration, the pipeline of liquid medium uses.General material, acid resistance is good, and intensity is not high; Intensity is high, but processibility and acid resistance poor.For adapting to the requirement of particular job environment and high-pressure delivery, higher requirement is put forward to the decay resistance of valve body material and intensity.
Summary of the invention
The object of this invention is to provide a kind of production method of large-scale acidproof valve body.
For solving the problems of the technologies described above, the present invention adopts following technological scheme: 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, testing property, ball blast, Magnetic testing, roughing, hardness test, ultrasound detection, ball blast, typewriting, packaging, and during casting, in molten iron, each chemical element weight percentage is as follows:
Carbon: 0.08 ~ 0.15; Silicon: be less than or equal to 1; Manganese: be less than or equal to 1; Chromium: 11.5 ~ 13.5; Phosphorus: be less than or equal to 0.025; Molybdenum: be less than or equal to 0.6; Sulphur: be less than or equal to 0.025; Nickel: be less than or equal to 0.5; Remaining as iron and inevitable impurity, described impurity content is less than 0.01.
Optimize, the length of valve body is D, diameter is Φ, in heating steps, as the length≤950mm expected, and valve body is endways dress, but valve body and valve body, between valve body and furnace wall, interval must not be less than 80mm, and between valve body and valve body, gap should evenly be put; As the length > 950mm of valve body, in order to avoid flame injects directly on raw material, when placing raw material in nozzle direct projection direction, raw material position must not be less than 1 meter from the distance of nozzle.
Optimize, the length of valve body is D, diameter is Φ, in heating steps, valve body heats up with stove, charging temperature≤600 DEG C, as Φ≤280mm, furnace temperature first remains on 850 ~ 860 DEG C, high-temperature holding time is 0.6min/mm, is again warming up to 1150 ~ 1160 DEG C with stove subsequently, and high-temperature holding time is 0.6min/mm ± 60min; As 280mm < Φ, furnace temperature first remains on 850 ~ 860 DEG C, and high-temperature holding time is 0.6min/mm, is again warming up to 1170 ~ 1180 DEG C with stove subsequently, and high-temperature holding time is 0.6min/mm ± 60min.
Optimize, described forging die process comprise again remove valve body blank end face scale, jumping-up or card pressure, put into that die cavity touches 4 ~ 5 hammers, valve body blank shifts out, remove valve body blank surface and die cavity scale, lubricated dies die cavity, that valve body blank is put into finish-forging die cavity is shaping.
Optimize, initial forging temperature: 1030 ~ 1100 DEG C; Final forging temperature is more than or equal to 850 DEG C.
Further, step heat treatment comprises austenitizing, quenching, a tempering, double tempering, the medium of described austenitizing be air or nitrogen, austenitizing temperature is for being more than or equal to 927 DEG C, holding time T >=0.5 hour/inch, T is not less than 1, and inch value gets 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 of a described tempering is the mixed gas of air and nitrogen, and tempering temperature is for being more than or equal to 677 DEG C, and holding time T >=0.75 hour/inch, T is not less than 1, and inch value gets valve body thickest.
Further, after a tempering, after valve body cool to room temperature, carry out double tempering, the medium of described double tempering is the mixed gas of air and nitrogen, and tempering temperature is more than or equal to 649 DEG C, holding time T >=0.75 hour/inch, T is not less than 1, and inch value gets valve body thickest.
Further, double tempering temperature is less than Tempering temperature.
Beneficial effect of the present invention is: constitutive material formula of the present invention is reasonable, and alloy has highly-acidproof, the hot strength of improvement, is applicable to the valve being applied to the use of highly acid occasion, the long service life of valve, up-to-standard rate is high, substantially increases the quality of product, is applicable to extensively promoting.
Accompanying drawing explanation
Accompanying drawing 1 is the plan view of valve body in the present invention;
Accompanying drawing 2 is the plan view of valve body in the present invention.
Embodiment
Below the present invention is described in detail below:
The production method of this large-scale acidproof valve body, it comprises the following steps successively: a kind of production method of large-scale acidproof valve body, and 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, testing property, ball blast, Magnetic testing, roughing, hardness test, ultrasound detection, ball blast, typewriting, packaging.
During casting, in molten iron, each chemical element weight percentage is as follows:
Carbon: 0.08 ~ 0.15; Silicon: be less than or equal to 1; Manganese: be less than or equal to 1; Chromium: 11.5 ~ 13.5; Phosphorus: be less than or equal to 0.025; Molybdenum: be less than or equal to 0.6; Sulphur: be less than or equal to 0.025; Nickel: be less than or equal to 0.5; Remaining as iron and inevitable impurity, described impurity content is 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, described 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, described 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; Remaining as iron and inevitable impurity, described impurity content is less than 0.01;
The length of valve body is D, diameter is Φ, in heating steps, as the length≤950mm expected, and valve body is endways dress, but valve body and valve body, between valve body and furnace wall, interval must not be less than 80mm, and between valve body and valve body, gap should evenly be put; As the length > 950mm of valve body, in order to avoid flame injects directly on raw material, when placing raw material in nozzle direct projection direction, raw material position must not be less than 1 meter from the distance of nozzle.The length of valve body is D, diameter is Φ, in heating steps, valve body heats up with stove, charging temperature≤600 DEG C, as Φ≤280mm, furnace temperature first remains on 850 ~ 860 DEG C, and high-temperature holding time is 0.6min/mm, again be warming up to 1150 ~ 1160 DEG C with stove subsequently, high-temperature holding time is 0.6min/mm ± 60min; As 280mm < Φ, furnace temperature first remains on 850 ~ 860 DEG C, and high-temperature holding time is 0.6min/mm, is again warming up to 1170 ~ 1180 DEG C with stove subsequently, and high-temperature holding time is 0.6min/mm ± 60min.
Forging die process comprise again remove valve body blank end face scale, jumping-up or card pressure, put into that die cavity touches 2 ~ 3 hammers, valve body blank shifts out, remove valve body blank surface and die cavity scale, lubricated dies die cavity, that valve body blank is put into finish-forging die cavity is shaping.Wherein it is to be noted that initial forging temperature: 1030 ~ 1100 DEG C; Final forging temperature is more than or equal to 850 DEG C; Forging die requires that insulation is more than 6 hours preheat time; Again forging should be shifted out before described forging final molding and confirm that forging surface non-scale exists and confirms that forging die has been beaten and be full of by, forging; Touch above and forge (4 ~ 5 hammer), shifting out forging after location blows off in scale production process, execute the temperature variations that hammer personnel will observe valve body neck location, neck location temperature rises above this body temperature 50 DEG C and is advisable, and the strike weight that will control when exceeding to hammer into shape hits beat with forging; Uninterruptedly spread sawdust in forging process and blow scale; Timely Cooling and Lubricator mold cavity after complete one of every finish-forging, thus ensure quality of product.
Heat treatment comprises austenitizing, quenching, a tempering, double tempering.The medium of described austenitizing be air or nitrogen, austenitizing temperature for being more than or equal to 927 DEG C, holding time T >=0.5 hour/inch, T is not less than 1, and inch value gets valve body thickest; The medium of quenching is water, water temperature≤38 DEG C before quenching, water temperature≤49 DEG C after quenching; The medium of a described tempering is the mixed gas of air and nitrogen, and tempering temperature is for being more than or equal to 677 DEG C, holding time T >=0.75 hour/inch, and T is not less than 1, and inch value gets valve body thickest; After a tempering, double tempering is carried out after valve body cool to room temperature, the medium of described double tempering is the mixed gas of air and nitrogen, tempering temperature is more than or equal to 649 DEG C, holding time T >=0.75 hour/inch, T is not less than 1, and inch value gets valve body thickest, and double tempering temperature is less than Tempering temperature.
By aforementioned production method, the valve body performance table obtained is as follows:
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to the present invention's spirit change or modify, and all should be encompassed within protection scope of the present invention.
Claims (10)
1. the production method of one kind large-scale acidproof valve body, it is characterized in that, 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, testing property, ball blast, Magnetic testing, roughing, hardness test, ultrasound detection, ball blast, typewriting, packaging, and during casting, in molten iron, each chemical element weight percentage is as follows:
Carbon: 0.08 ~ 0.15; Silicon: be less than or equal to 1; Manganese: be less than or equal to 1; Chromium: 11.5 ~ 13.5; Phosphorus: be less than or equal to 0.025; Molybdenum: be less than or equal to 0.6; Sulphur: be less than or equal to 0.025; Nickel: be less than or equal to 0.5; Remaining as iron and inevitable impurity, described impurity content is less than 0.01.
2. the production method of large-scale acidproof valve body according to claim 1, it is characterized in that: the length of valve body is D, diameter is Φ, in heating steps, as the length≤950mm expected, valve body is endways dress, but valve body and valve body, between valve body and furnace wall, interval must not be less than 80mm, between valve body and valve body, gap should evenly be put; As the length > 950mm of valve body, in order to avoid flame injects directly on raw material, when placing raw material in nozzle direct projection direction, raw material position must not be less than 1 meter from the distance of nozzle.
3. the production method of large-scale acidproof valve body according to claim 1, it is characterized in that: the length of valve body is D, diameter is Φ, in heating steps, valve body heats up with stove, charging temperature≤600 DEG C, as Φ≤280mm, furnace temperature first remains on 850 ~ 860 DEG C, high-temperature holding time is 0.6min/mm, is again warming up to 1150 ~ 1160 DEG C with stove subsequently, and high-temperature holding time is 0.6min/mm ± 60min; As 280mm < Φ, furnace temperature first remains on 850 ~ 860 DEG C, and high-temperature holding time is 0.6min/mm, is again warming up to 1170 ~ 1180 DEG C with stove subsequently, and high-temperature holding time is 0.6min/mm ± 60min.
4. the production method of large-scale acidproof valve body according to claim 1, is characterized in that: described forging die process comprise again remove valve body blank end face scale, jumping-up or card pressure, put into that die cavity touches 4 ~ 5 hammers, valve body blank shifts out, remove valve body blank surface and die cavity scale, lubricated dies die cavity, that valve body blank is put into finish-forging die cavity is shaping.
5. the production method of large-scale acidproof valve body according to claim 1, is characterized in that: initial forging temperature: 1030 ~ 1100 DEG C; Final forging temperature is more than or equal to 850 DEG C.
6. the production method of large-scale acidproof valve body according to claim 1, it is characterized in that: step heat treatment comprises austenitizing, quenching, a tempering, double tempering, the medium of described austenitizing be air or nitrogen, austenitizing temperature is for being more than or equal to 927 DEG C, holding time T >=0.5 hour/inch, T is not less than 1, and inch value gets valve body thickest.
7. the production method of large-scale acidproof valve body according to claim 6, is characterized in that: the medium of quenching is water, water temperature≤38 DEG C before quenching, water temperature≤49 DEG C after quenching.
8. the production method of large-scale acidproof valve body according to claim 6, it is characterized in that: the medium of a described tempering is the mixed gas of air and nitrogen, tempering temperature for being more than or equal to 677 DEG C, holding time T >=0.75 hour/inch, T is not less than 1, and inch value gets valve body thickest.
9. the production method of large-scale acidproof valve body according to claim 6, it is characterized in that: after a tempering, double tempering is carried out after valve body cool to room temperature, the medium of described double tempering is the mixed gas of air and nitrogen, tempering temperature is more than or equal to 649 DEG C, holding time T >=0.75 hour/inch, T is not less than 1, and inch value gets valve body thickest.
10. the production method of large-scale acidproof valve body according to claim 7, is characterized in that: double tempering temperature is less than Tempering temperature.
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| CN201410424256.5A CN104214392B (en) | 2014-08-26 | 2014-08-26 | A kind of production method of large-scale acidproof valve body |
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| CN201410424256.5A CN104214392B (en) | 2014-08-26 | 2014-08-26 | A kind of production method of large-scale acidproof valve body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846288A (en) * | 2015-04-22 | 2015-08-19 | 苏州劲元油压机械有限公司 | 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104846288A (en) * | 2015-04-22 | 2015-08-19 | 苏州劲元油压机械有限公司 | 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 |
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| CN104214392B (en) | 2017-12-26 |
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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. |
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