CN104791516A - Manufacturing technology for mechanical reversing valve - Google Patents
Manufacturing technology for mechanical reversing valve Download PDFInfo
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- CN104791516A CN104791516A CN201510189949.5A CN201510189949A CN104791516A CN 104791516 A CN104791516 A CN 104791516A CN 201510189949 A CN201510189949 A CN 201510189949A CN 104791516 A CN104791516 A CN 104791516A
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- temperature
- selector valve
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Classifications
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a manufacturing technology for a mechanical reversing valve. The manufacturing technology for the mechanical reversing valve comprises the steps that 1, appropriate alloy billet is selected; 2, the billet is forged; 3, heat treatment and machining are performed; 4, quenching and tempering heat treatment is performed, and two-time normalizing and one-time tempering are adopted; 5, reversing valve semi-finished products which are subject to the quenching and tempering heat treatment are cooled to the room temperature, and cooling adopts the combination of water cooling and air cooling; 6, subsequent physical and chemical inspection and ultrasonic flaw detection are performed on obtained reversing valve finished products, and then the reversing valve finished products are put in storage after cleaning package. According to the manufacturing technology for the mechanical reversing valve, the technology is simple, the design is scientific, the productive process is safe and stable, and contamination does not exist; the mechanical reversing valve can resist corrosion and high temperature, and is not prone to deforming and aging and long in service life.
Description
Technical field
The invention belongs to technical field of hydraulic equipment, relate to a kind of hydraulic pressure fuel tap, particularly a kind of manufacturing process of mechanical switching valve.
Background technique
Valve is controlling component in pipeline fluid transporting system, and it is used to change path section and media flow direction, has the functions such as water conservancy diversion, cut-off, throttling, non-return, shunting or overflow release.In the technical support that valve is produced and researched and developed, state's inner valve falls behind unlike external valve, and products a lot of on the contrary can compare favourably with international business in technology and innovation, and the development of domestic valve industry moves ahead toward the direction of high-end modern.
Under industrialization, urbanization, reform and globalization four great promote, China's valve equipment manufacture prospect or broad, following valve industry high-endization, production domesticization, will be that valve industry will develop Main way from now at modernization.Pursue constantly innovation, for valve enterprise creates the market made new advances, enterprise could be allowed to seek survival in increasingly competitive pump valve industry spring tide, try for the development.Along with the development of valve gate technology, constantly widening of valve applications field, valve standard corresponding is with it also more and more indispensable.In the period of valve industry product introduction one innovation, not only product category needs to update, and enterprise internal management also needs to deepen reforms according to the standard of industry.Therefore, need, while fully using existing standard, to look forward to the future, work out and can apply to new standard in the future and new system, thus the development that propulsion valve technology is higher level.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provides a kind of manufacturing process of mechanical switching valve, present invention process is simple, design science, and production process safety and stability is pollution-free, this product corrosion-resistant and high-temperature resistant, not yielding aging, long service life.
In order to solve above technical problem, the invention provides a kind of manufacturing process of mechanical switching valve, concrete steps are as follows:
(1) chemical composition of alloy blank and mass percent is selected to be: B:0.33-0.38%, Cr:6.81-6.83%, Ni:1.15-1.35%, N:0.47-0.49%, C:0.03-0.04%, Mo:0.16-0.18%, Cu:0.87-0.93%, W:0.74-0.76%, Si:0.52-0.54%, Mn:0.65-0.68%, Ti:0.13-0.15%, Ca:0.33-0.37%, Se:0.02-0.03%, Te:0.071-0.073%, S:0.003-0.005%, P:0.005-0.008%, all the other are Fe and inevitable impurity, alloy blank through in steel mill and smelting, selector valve blank is made in hot rolling and cooling, with abrasive wheel cutting machine, blank is cut, on crank press, bar is squeezed after cutting, swaging is shaped, obtain selector valve forming blank,
(2) forged by the selector valve forming blank in step (1), blocking temperature is 910-920 DEG C, and final forging temperature is 960-970 DEG C, obtains selector valve semi-finished product;
(3) the selector valve semi-finished product obtained after forging in step (2) are heat-treated and carried out machining;
(4) Tempering and Quenching is carried out to the selector valve semi-finished product after machined in step (3): adopt double normalizing+tempering, first time normalizing temperature be greater than second time normalizing temperature; First time normalizing: normalizing temperature 835-845 DEG C, is incubated 9-10min after temperature; Second time normalizing: normalizing temperature 785-795 DEG C, is incubated 5-6min after temperature; Tempering: adopt heat stepwise, first paragraph heating-up temperature is 520-540 DEG C, is incubated 12-14min after temperature, and second segment heating-up temperature is 710-730 DEG C, is incubated 9-11min after temperature;
(5) to the selector valve semi-finished product cool to room temperature through Tempering and Quenching in step (4), cooling adopts water-cooled to be combined with air cooling, first with the rate of cooling of 5-7 DEG C/s by selector valve semi-finished product water-cooled to 535-545 DEG C, then air cooling is to 385-395 DEG C, again with the cooling rate of 2-3 DEG C/s by selector valve semi-finished product water-cooled to 165-185 DEG C, last air cooling to room temperature obtains finished product selector valve;
(6) the selector valve finished product obtained is put in storage finally by clean packaging through follow-up physical and chemical inspection and ultrasonic flaw detection.
The invention has the beneficial effects as follows:
Containing a large amount of trace elements in the alloy blank that the present invention selects, wherein: carbon, yield point and tensile strength is improved; Silicon, in steelmaking process, add silicon as reducing agent and deoxidizing agent, can significantly improve the limit of elasticity of steel, yield point and tensile strength, the combinations such as silicon and molybdenum, tungsten, chromium, are improved corrosion resistance and oxidation resistant effect; Manganese, in steelmaking process, manganese is good deoxidizing agent and desulfurizing agent, makes steel not only have enough toughness, and has higher intensity and hardness, improves the quenching property of steel, improves the hot-working character of steel, improves wear resistance; Chromium, in structural steel and tool steel, chromium can significantly improve intensity, hardness and wear resistance, but reduces plasticity and toughness simultaneously, can also improve oxidative stability and the corrosion resistance of steel; Nickel, nickel can improve the intensity of steel, and keeps good plasticity and toughness, has higher corrosion resistance to soda acid, at high temperature has antirust and temperature capacity; Molybdenum, can make the grain refinement of steel, improves hardenability and thermostrength, keeps enough intensity and creep resisting ability when high temperature, improves mechanical property; Titanium, titanium is strong deoxidizing agent in steel, can make the dense internal organization of steel, crystal grain thinning power, and reduce aging sensitivity and cold shortness, improving welding property, avoids intergranular corrosion; Tungsten, tungsten and carbon form Tungsten carbite very high hardness and wear resistance; Boron, the boron adding trace in steel can improve compactness and the hot rolling performance of steel, improves intensity; Nitrogen, nitrogen can improve the intensity of steel, low-temperature flexibility and weldability, increases aging sensitivity.
Present invention process is simple, design science, and production process safety and stability is pollution-free, this product corrosion-resistant and high-temperature resistant, not yielding aging, long service life.
Embodiment
embodiment 1
The present embodiment provides a kind of manufacturing process of mechanical switching valve, and concrete steps are as follows:
(1) chemical composition of alloy blank and mass percent is selected to be: B:0.33%, Cr:6.81%, Ni:1.15%, N:0.47%, C:0.03%, Mo:0.16%, Cu:0.87%, W:0.74%, Si:0.52%, Mn:0.65%, Ti:0.13%, Ca:0.33%, Se:0.02%, Te:0.071%, S:0.003%, P:0.005%, all the other are Fe and inevitable impurity, alloy blank through in steel mill and smelting, selector valve blank is made in hot rolling and cooling, with abrasive wheel cutting machine, blank is cut, on crank press, bar is squeezed after cutting, swaging is shaped, obtain selector valve forming blank,
(2) forged by the selector valve forming blank in step (1), blocking temperature is 910 DEG C, and final forging temperature is 960 DEG C, obtains selector valve semi-finished product;
(3) the selector valve semi-finished product obtained after forging in step (2) are heat-treated and carried out machining;
(4) Tempering and Quenching is carried out to the selector valve semi-finished product after machined in step (3): adopt double normalizing+tempering, first time normalizing temperature be greater than second time normalizing temperature; First time normalizing: normalizing temperature 835 DEG C, is incubated 10min after temperature; Second time normalizing: normalizing temperature 785 DEG C, is incubated 6min after temperature; Tempering: adopt heat stepwise, first paragraph heating-up temperature is 520 DEG C, is incubated 14min after temperature, and second segment heating-up temperature is 710 DEG C, is incubated 11min after temperature;
(5) to the selector valve semi-finished product cool to room temperature through Tempering and Quenching in step (4), cooling adopts water-cooled to be combined with air cooling, first with the rate of cooling of 5 DEG C/s by selector valve semi-finished product water-cooled to 535 DEG C, then air cooling to 385 DEG C, again with the cooling rate of 2 DEG C/s by selector valve semi-finished product water-cooled to 165 DEG C, last air cooling to room temperature obtains finished product selector valve;
(6) the selector valve finished product obtained is put in storage finally by clean packaging through follow-up physical and chemical inspection and ultrasonic flaw detection.
embodiment 2
The present embodiment provides a kind of manufacturing process of mechanical switching valve, and concrete steps are as follows:
(1) chemical composition of alloy blank and mass percent is selected to be: B:0.38%, Cr:6.83%, Ni:1.35%, N:0.49%, C:0.04%, Mo:0.18%, Cu:0.93%, W:0.76%, Si:0.54%, Mn:0.68%, Ti:0.15%, Ca:0.37%, Se:0.03%, Te:0.073%, S:0.005%, P:0.008%, all the other are Fe and inevitable impurity, alloy blank through in steel mill and smelting, selector valve blank is made in hot rolling and cooling, with abrasive wheel cutting machine, blank is cut, on crank press, bar is squeezed after cutting, swaging is shaped, obtain selector valve forming blank,
(2) forged by the selector valve forming blank in step (1), blocking temperature is 920 DEG C, and final forging temperature is 970 DEG C, obtains selector valve semi-finished product;
(3) the selector valve semi-finished product obtained after forging in step (2) are heat-treated and carried out machining;
(4) Tempering and Quenching is carried out to the selector valve semi-finished product after machined in step (3): adopt double normalizing+tempering, first time normalizing temperature be greater than second time normalizing temperature; First time normalizing: normalizing temperature 845 DEG C, is incubated 9min after temperature; Second time normalizing: normalizing temperature 795 DEG C, is incubated 5min after temperature; Tempering: adopt heat stepwise, first paragraph heating-up temperature is 540 DEG C, is incubated 12min after temperature, and second segment heating-up temperature is 730 DEG C, is incubated 9min after temperature;
(5) to the selector valve semi-finished product cool to room temperature through Tempering and Quenching in step (4), cooling adopts water-cooled to be combined with air cooling, first with the rate of cooling of 7 DEG C/s by selector valve semi-finished product water-cooled to 545 DEG C, then air cooling to 395 DEG C, again with the cooling rate of 3 DEG C/s by selector valve semi-finished product water-cooled to 185 DEG C, last air cooling to room temperature obtains finished product selector valve;
(6) the selector valve finished product obtained is put in storage finally by clean packaging through follow-up physical and chemical inspection and ultrasonic flaw detection.
embodiment 3
The present embodiment provides a kind of manufacturing process of mechanical switching valve, and concrete steps are as follows:
(1) chemical composition of alloy blank and mass percent is selected to be: B:0.35%, Cr:6.82%, Ni:1.25%, N:0.48%, C:0.03%, Mo:0.17%, Cu:0.90%, W:0.75%, Si:0.53%, Mn:0.66%, Ti:0.14%, Ca:0.35%, Se:0.03%, Te:0.072%, S:0.004%, P:0.006%, all the other are Fe and inevitable impurity, alloy blank through in steel mill and smelting, selector valve blank is made in hot rolling and cooling, with abrasive wheel cutting machine, blank is cut, on crank press, bar is squeezed after cutting, swaging is shaped, obtain selector valve forming blank,
(2) forged by the selector valve forming blank in step (1), blocking temperature is 915 DEG C, and final forging temperature is 965 DEG C, obtains selector valve semi-finished product;
(3) the selector valve semi-finished product obtained after forging in step (2) are heat-treated and carried out machining;
(4) Tempering and Quenching is carried out to the selector valve semi-finished product after machined in step (3): adopt double normalizing+tempering, first time normalizing temperature be greater than second time normalizing temperature; First time normalizing: normalizing temperature 840 DEG C, is incubated 10min after temperature; Second time normalizing: normalizing temperature 790 DEG C, is incubated 5min after temperature; Tempering: adopt heat stepwise, first paragraph heating-up temperature is 530 DEG C, is incubated 13min after temperature, and second segment heating-up temperature is 720 DEG C, is incubated 10min after temperature;
(5) to the selector valve semi-finished product cool to room temperature through Tempering and Quenching in step (4), cooling adopts water-cooled to be combined with air cooling, first with the rate of cooling of 6 DEG C/s by selector valve semi-finished product water-cooled to 540 DEG C, then air cooling to 390 DEG C, again with the cooling rate of 2 DEG C/s by selector valve semi-finished product water-cooled to 175 DEG C, last air cooling to room temperature obtains finished product selector valve;
(6) the selector valve finished product obtained is put in storage finally by clean packaging through follow-up physical and chemical inspection and ultrasonic flaw detection.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technological scheme basis is done, all falls within scope.
Claims (4)
1. a manufacturing process for mechanical switching valve, is characterized in that, concrete steps are as follows:
(1) chemical composition of alloy blank and mass percent is selected to be: B:0.33-0.38%, Cr:6.81-6.83%, Ni:1.15-1.35%, N:0.47-0.49%, C:0.03-0.04%, Mo:0.16-0.18%, Cu:0.87-0.93%, W:0.74-0.76%, Si:0.52-0.54%, Mn:0.65-0.68%, Ti:0.13-0.15%, Ca:0.33-0.37%, Se:0.02-0.03%, Te:0.071-0.073%, S:0.003-0.005%, P:0.005-0.008%, all the other are Fe and inevitable impurity, alloy blank through in steel mill and smelting, selector valve blank is made in hot rolling and cooling, with abrasive wheel cutting machine, blank is cut, on crank press, bar is squeezed after cutting, swaging is shaped, obtain selector valve forming blank,
(2) forged by the selector valve forming blank in step (1), blocking temperature is 910-920 DEG C, and final forging temperature is 960-970 DEG C, obtains selector valve semi-finished product;
(3) the selector valve semi-finished product obtained after forging in step (2) are heat-treated and carried out machining;
(4) Tempering and Quenching is carried out to the selector valve semi-finished product after machined in step (3): adopt double normalizing+tempering, first time normalizing temperature be greater than second time normalizing temperature; First time normalizing: normalizing temperature 835-845 DEG C, is incubated 9-10min after temperature; Second time normalizing: normalizing temperature 785-795 DEG C, is incubated 5-6min after temperature; Tempering: adopt heat stepwise, first paragraph heating-up temperature is 520-540 DEG C, is incubated 12-14min after temperature, and second segment heating-up temperature is 710-730 DEG C, is incubated 9-11min after temperature;
(5) to the selector valve semi-finished product cool to room temperature through Tempering and Quenching in step (4), cooling adopts water-cooled to be combined with air cooling, first with the rate of cooling of 5-7 DEG C/s by selector valve semi-finished product water-cooled to 535-545 DEG C, then air cooling is to 385-395 DEG C, again with the cooling rate of 2-3 DEG C/s by selector valve semi-finished product water-cooled to 165-185 DEG C, last air cooling to room temperature obtains finished product selector valve;
(6) the selector valve finished product obtained is put in storage finally by clean packaging through follow-up physical and chemical inspection and ultrasonic flaw detection.
2. the manufacturing process of mechanical switching valve according to claim 1, it is characterized in that, concrete steps are as follows:
(1) chemical composition of alloy blank and mass percent is selected to be: B:0.33%, Cr:6.81%, Ni:1.15%, N:0.47%, C:0.03%, Mo:0.16%, Cu:0.87%, W:0.74%, Si:0.52%, Mn:0.65%, Ti:0.13%, Ca:0.33%, Se:0.02%, Te:0.071%, S:0.003%, P:0.005%, all the other are Fe and inevitable impurity, alloy blank through in steel mill and smelting, selector valve blank is made in hot rolling and cooling, with abrasive wheel cutting machine, blank is cut, on crank press, bar is squeezed after cutting, swaging is shaped, obtain selector valve forming blank,
(2) forged by the selector valve forming blank in step (1), blocking temperature is 910 DEG C, and final forging temperature is 960 DEG C, obtains selector valve semi-finished product;
(3) the selector valve semi-finished product obtained after forging in step (2) are heat-treated and carried out machining;
(4) Tempering and Quenching is carried out to the selector valve semi-finished product after machined in step (3): adopt double normalizing+tempering, first time normalizing temperature be greater than second time normalizing temperature; First time normalizing: normalizing temperature 835 DEG C, is incubated 10min after temperature; Second time normalizing: normalizing temperature 785 DEG C, is incubated 6min after temperature; Tempering: adopt heat stepwise, first paragraph heating-up temperature is 520 DEG C, is incubated 14min after temperature, and second segment heating-up temperature is 710 DEG C, is incubated 11min after temperature;
(5) to the selector valve semi-finished product cool to room temperature through Tempering and Quenching in step (4), cooling adopts water-cooled to be combined with air cooling, first with the rate of cooling of 5 DEG C/s by selector valve semi-finished product water-cooled to 535 DEG C, then air cooling to 385 DEG C, again with the cooling rate of 2 DEG C/s by selector valve semi-finished product water-cooled to 165 DEG C, last air cooling to room temperature obtains finished product selector valve;
(6) the selector valve finished product obtained is put in storage finally by clean packaging through follow-up physical and chemical inspection and ultrasonic flaw detection.
3. the manufacturing process of mechanical switching valve according to claim 1, it is characterized in that, concrete steps are as follows:
(1) chemical composition of alloy blank and mass percent is selected to be: B:0.38%, Cr:6.83%, Ni:1.35%, N:0.49%, C:0.04%, Mo:0.18%, Cu:0.93%, W:0.76%, Si:0.54%, Mn:0.68%, Ti:0.15%, Ca:0.37%, Se:0.03%, Te:0.073%, S:0.005%, P:0.008%, all the other are Fe and inevitable impurity, alloy blank through in steel mill and smelting, selector valve blank is made in hot rolling and cooling, with abrasive wheel cutting machine, blank is cut, on crank press, bar is squeezed after cutting, swaging is shaped, obtain selector valve forming blank,
(2) forged by the selector valve forming blank in step (1), blocking temperature is 920 DEG C, and final forging temperature is 970 DEG C, obtains selector valve semi-finished product;
(3) the selector valve semi-finished product obtained after forging in step (2) are heat-treated and carried out machining;
(4) Tempering and Quenching is carried out to the selector valve semi-finished product after machined in step (3): adopt double normalizing+tempering, first time normalizing temperature be greater than second time normalizing temperature; First time normalizing: normalizing temperature 845 DEG C, is incubated 9min after temperature; Second time normalizing: normalizing temperature 795 DEG C, is incubated 5min after temperature; Tempering: adopt heat stepwise, first paragraph heating-up temperature is 540 DEG C, is incubated 12min after temperature, and second segment heating-up temperature is 730 DEG C, is incubated 9min after temperature;
(5) to the selector valve semi-finished product cool to room temperature through Tempering and Quenching in step (4), cooling adopts water-cooled to be combined with air cooling, first with the rate of cooling of 7 DEG C/s by selector valve semi-finished product water-cooled to 545 DEG C, then air cooling to 395 DEG C, again with the cooling rate of 3 DEG C/s by selector valve semi-finished product water-cooled to 185 DEG C, last air cooling to room temperature obtains finished product selector valve;
(6) the selector valve finished product obtained is put in storage finally by clean packaging through follow-up physical and chemical inspection and ultrasonic flaw detection.
4. the manufacturing process of mechanical switching valve according to claim 1, it is characterized in that, concrete steps are as follows:
(1) chemical composition of alloy blank and mass percent is selected to be: B:0.35%, Cr:6.82%, Ni:1.25%, N:0.48%, C:0.03%, Mo:0.17%, Cu:0.90%, W:0.75%, Si:0.53%, Mn:0.66%, Ti:0.14%, Ca:0.35%, Se:0.03%, Te:0.072%, S:0.004%, P:0.006%, all the other are Fe and inevitable impurity, alloy blank through in steel mill and smelting, selector valve blank is made in hot rolling and cooling, with abrasive wheel cutting machine, blank is cut, on crank press, bar is squeezed after cutting, swaging is shaped, obtain selector valve forming blank,
(2) forged by the selector valve forming blank in step (1), blocking temperature is 915 DEG C, and final forging temperature is 965 DEG C, obtains selector valve semi-finished product;
(3) the selector valve semi-finished product obtained after forging in step (2) are heat-treated and carried out machining;
(4) Tempering and Quenching is carried out to the selector valve semi-finished product after machined in step (3): adopt double normalizing+tempering, first time normalizing temperature be greater than second time normalizing temperature; First time normalizing: normalizing temperature 840 DEG C, is incubated 10min after temperature; Second time normalizing: normalizing temperature 790 DEG C, is incubated 5min after temperature; Tempering: adopt heat stepwise, first paragraph heating-up temperature is 530 DEG C, is incubated 13min after temperature, and second segment heating-up temperature is 720 DEG C, is incubated 10min after temperature;
(5) to the selector valve semi-finished product cool to room temperature through Tempering and Quenching in step (4), cooling adopts water-cooled to be combined with air cooling, first with the rate of cooling of 6 DEG C/s by selector valve semi-finished product water-cooled to 540 DEG C, then air cooling to 390 DEG C, again with the cooling rate of 2 DEG C/s by selector valve semi-finished product water-cooled to 175 DEG C, last air cooling to room temperature obtains finished product selector valve;
(6) the selector valve finished product obtained is put in storage finally by clean packaging through follow-up physical and chemical inspection and ultrasonic flaw detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510189949.5A CN104791516A (en) | 2015-04-21 | 2015-04-21 | Manufacturing technology for mechanical reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510189949.5A CN104791516A (en) | 2015-04-21 | 2015-04-21 | Manufacturing technology for mechanical reversing valve |
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| Publication Number | Publication Date |
|---|---|
| CN104791516A true CN104791516A (en) | 2015-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510189949.5A Pending CN104791516A (en) | 2015-04-21 | 2015-04-21 | Manufacturing technology for mechanical reversing valve |
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| CN (1) | CN104791516A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445379A (en) * | 2002-03-15 | 2003-10-01 | 大同特殊钢株式会社 | Hot-working tool steel with good machine work performance and preparation method therefor |
| CN101016951A (en) * | 2007-03-03 | 2007-08-15 | 闫晓峰 | Manufacturing technique for fitting of high-pressure valve |
| CN103103459A (en) * | 2013-02-18 | 2013-05-15 | 无锡市派克重型铸锻有限公司 | Large-scale forging and manufacture process wind electricity slewing bearing forging and manufacturing process |
| CN103147021A (en) * | 2013-03-26 | 2013-06-12 | 无锡市派克重型铸锻有限公司 | Martensitic stainless steel forged piece and forging and rolling heat treatment integrated production process |
| CN104040012A (en) * | 2011-12-20 | 2014-09-10 | Ati资产公司 | High strength, corrosion resistant austenitic alloys |
-
2015
- 2015-04-21 CN CN201510189949.5A patent/CN104791516A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445379A (en) * | 2002-03-15 | 2003-10-01 | 大同特殊钢株式会社 | Hot-working tool steel with good machine work performance and preparation method therefor |
| CN101016951A (en) * | 2007-03-03 | 2007-08-15 | 闫晓峰 | Manufacturing technique for fitting of high-pressure valve |
| CN104040012A (en) * | 2011-12-20 | 2014-09-10 | Ati资产公司 | High strength, corrosion resistant austenitic alloys |
| CN103103459A (en) * | 2013-02-18 | 2013-05-15 | 无锡市派克重型铸锻有限公司 | Large-scale forging and manufacture process wind electricity slewing bearing forging and manufacturing process |
| CN103147021A (en) * | 2013-03-26 | 2013-06-12 | 无锡市派克重型铸锻有限公司 | Martensitic stainless steel forged piece and forging and rolling heat treatment integrated production process |
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