CN105177494A - High-voltage switching tube valve manufacturing method and high-voltage switching tube valve - Google Patents
High-voltage switching tube valve manufacturing method and high-voltage switching tube valve Download PDFInfo
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- CN105177494A CN105177494A CN201510577325.0A CN201510577325A CN105177494A CN 105177494 A CN105177494 A CN 105177494A CN 201510577325 A CN201510577325 A CN 201510577325A CN 105177494 A CN105177494 A CN 105177494A
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- pipe valve
- voltage switch
- switch gear
- outer tube
- tube wall
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/44—Carburising
- C23C8/46—Carburising of ferrous surfaces
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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
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
Abstract
The invention discloses a high-voltage switching tube valve manufacturing method and a high-voltage switching tube valve and belongs to the technical field of heat processing. The high-voltage switching tube valve manufacturing method comprises the following steps: a high-voltage switching tube valve blank is manufactured after discharging, and comprises a middle tube section and a switching-in section and a switching-off section which are respectively connected at two ends of the middle tube section; the obtained high-voltage switching tube valve blank is subjected to carburization under 910-930 DEG C and a carburization layer is formed, wherein the thickness of the carburization layer is greater than the technology allowance of the outer tube walls of the switching-in section and the switching-off section, and is smaller than the technology allowance of the outer tube wall of the middle tube section; cooling is carried out, reheating is carried out to 840-860 DEG C and thermal insulation is carried out for 4-16min; cooling in oil is carried out; tempering is carried out for 60-90min under 500-520 DEG C; and cooling is carried out to obtain the high-voltage switching tube valve. The high-voltage switching tube valve which is processed by the high-voltage switching tube valve manufacturing method has the advantages that the surface hardness at two ends of the high-voltage switching tube valve is high, and the tenacity of middle section is high.
Description
Technical field
The present invention relates to a kind of high-voltage switch gear pipe valve preparation method and high-voltage switch gear pipe valve, belong to technical field of heat treatment.
Background technology
Carburization process is the chemical heat treatment process extensively adopted in machine building industry, mainly be applicable to the equipment part of taking up wear, alternation contact stress or stress in bending and shock load, as parts such as gear, support, wrist pins, especially apply comparatively general in vehicle, device fabrication industry.Carburization process refers to that steel-iron components heats and is incubated in carburizing medium, makes carbon atom infiltrate piece surface, increases the carbon content on steel-iron components top layer, and obtain a kind of chemical heat treatment process of certain carbon profile.The object of carburizing obtains high carbon content on the surface of soft steel or low-carbon alloy steel part, and through quenching, after tempering, make piece surface obtain high hardness and wear resistance, and the centre of part still keeps certain intensity and higher plasticity and toughness.
Manufacture field at high-voltage switch gear, carburization process also has certain application.Pipe valve is a vital part on high-voltage switch gear hydraulic gear, high-voltage switch gear pipe valve is tubular structure, comprise middle pipeline section, middle pipeline section one end is connected with combined floodgate section, the other end is connected with a point lockage chamber, the outer tube wall diameter of combined floodgate section is greater than middle pipeline section outer tube wall diameter, and the outer tube wall diameter of point lockage chamber is less than middle pipeline section pipe outer diameter.During specific works, under the effect of high-pressure oil, pipe valve moves along axis as reciprocating impact in valve body.This just requires that pipe valve has certain wear resistance, and inclined-plane, two ends valve port potted line be in strong shock action must not deformed depression or fall slag cracking, enough intensity, hardness and fatigue resistance must be had, require that again the core of pipe valve should keep certain intensity and good toughness simultaneously.
In the prior art, in order to improve the reliability of high-voltage switch gear pipe valve, generally carburizing, quenching, low-temperaturetempering process are carried out to pipe valve.Pipe valve carburized surface hardness after process is between 55 ~ 60HRC, and matrix hardness is between 39 ~ 45HRC.But, after the pipe valve application on-board the circuit breaker that this carburizing is heat treated, be easy to pipe valve distortion, CRACKING ACCIDENT occur at run duration.Its reason may be, this pipe valve is a kind of thin-walled parts, thinnest part is thick 2mm only, after above-mentioned thermal treatment, although it is surperficial and matrix hardness is higher, there is higher intensity, but the impact load stress concentration that bears of inclined-plane, two ends potted line place is comparatively large at work due to pipe valve, point, closing a floodgate to run only just there will be valve port line depression for more than 200 times and to broaden even local bursting crack, distortion and cause oil leakage phenomenon.
Summary of the invention
The object of the present invention is to provide a kind of high-voltage switch gear pipe valve preparation method, easily cave in solve prior art high-voltage switch pipe valve sealing valve port line place, be out of shape or the problem of local bursting crack.The present invention also aims to the high-voltage switch gear pipe valve that a kind of aforesaid method process is provided.
In order to realize above object, the technical scheme of high-voltage switch gear pipe valve preparation method of the present invention is as follows:
A kind of high-voltage switch gear pipe valve preparation method, comprises the steps:
1) machining blanks: blanking post-treatment obtains high-voltage switch gear pipe valve blank, described high-voltage switch gear pipe valve blank comprises middle pipeline section and is connected to combined floodgate section and point lockage chamber at described middle pipeline section two ends, and the technique allowance on the outer tube wall of described combined floodgate section and point lockage chamber is less than the technique allowance on the outer tube wall of described middle pipeline section;
2) carburizing: by step 1) the high-voltage switch gear pipe valve blank that obtains carries out carburizing and forms cementation zone at 910-930 DEG C, and cooling, obtains carburizing pipe valve workpiece; The thickness of described cementation zone is greater than the technique allowance on the outer tube wall of described combined floodgate section and point lockage chamber, is less than the technique allowance on the outer tube wall of described middle pipeline section;
3) machine-shaping: by step 2) in the carburizing pipe valve workpiece that obtains carry out machine-shaping and obtain shaping pipe valve workpiece, described machine-shaping comprises the technique allowance in the middle of turning on pipeline section outer tube wall, makes the residue technique allowance of middle pipeline section outer tube wall identical with combined floodgate section outer tube wall technique allowance with point lockage chamber; Also comprise the step of processing inner hole part;
4) quench: by step 3) in the shaping pipe valve workpiece heat that obtains be incubated 4-16min to 840-860 DEG C, cool in oil, must quench pipe valve workpiece;
5) tempering: by step 4) the quenching pipe valve workpiece that obtains is at 500-520 DEG C of tempering 60-90min, and cooling, obtains tempering pipe valve workpiece; Fine grinding, to obtain final product.
In high-voltage switch gear pipe valve preparation method of the present invention, the outer tube wall part (i.e. valve port line part) of pipe valve workpiece and the more combined floodgate section of external component contact and point lockage chamber is kept less technique allowance, after carburizing thermal treatment, grind off this stay mill part, still certain thickness cementation zone be can obtain, the hardness at above-mentioned position, intensity and wear resistance improve.And for the middle pipeline section part beyond valve port line part, keep larger technique allowance, machined away after carburizing, prevent middle pipeline section part from leaving cementation zone, thus make it keep higher toughness.Avoid combined floodgate section and the depression of dividing the valve port line place of the pipe outer wall intersection of lockage chamber pipe outer wall and middle pipeline section to occur stress concentration and causing, distortion and the Fragmentation Phenomena at pipe valve two ends, avoid the generation of oil leakage phenomenon, ensure that the normal divide-shut brake of high-voltage switch gear pipe valve, improve the reliability in its military service process.
The material of described high-voltage switch gear pipe valve adopts the trade mark to be the material of 20CrMnMo, and its mass percent consists of: the Si of the C of 0.17%-0.23%, 0.17%-0.37%, the Mn of 0.90%-1.20%, the Mo of the Cr of 1.10%-1.40%, 0.20%-0.30%, surplus is Fe.
Described high-voltage switch gear pipe valve is tubular structure, and comprise described middle pipeline section and described combined floodgate section and described point of lockage chamber, the outer tube wall diameter of combined floodgate section is greater than middle pipeline section outer tube wall diameter, and the outer tube wall diameter of point lockage chamber is less than middle pipeline section pipe outer diameter.The outer tube wall of high-voltage switch gear pipe valve combined floodgate section and point lockage chamber is valve port line part with the position of corresponding external parts top press-fit.
The large 0.6-0.9mm of technique allowance on the outer tube wall of the section of combined floodgate described in the Thickness Ratio of described cementation zone and point lockage chamber.Preferably, on the outer tube wall of described combined floodgate section and point lockage chamber, technique allowance is 0.2-0.3mm, and the outer tube wall of described middle pipeline section prevents the technique allowance of carburizing for being not less than 2.0mm, and the thickness of described cementation zone is 0.9-1.1mm.
Described step 2) in cooling adopt stove to be chilled to 830 DEG C after go out the cold or stove of space for collecting ashes in a stove and be chilled to less than 500 DEG C and carry out air cooling.
Described step 2) in carburizing can adopt carburization process of the prior art, general, use case-hardening furnace or pit carburizing furnace to carry out carburizing treatment.
In order to ensure the effect of quenching, soaking time is different according to different type of heating, described step 4) in heating adopt salt bath furnace or box-type furnace, when adopting salt bath furnace heating, soaking time is 4-6min, and when adopting box-type furnace heating, soaking time is 14-16min; Preferably, described step 4) in when adopting salt bath furnace heating soaking time be 5min, when adopting box-type furnace heating, soaking time is 15min.
Described step 4) in be cooled to and be cooled to room temperature.
Described step 5) in be cooled to and naturally cool to room temperature in atmosphere.
The technical scheme of high-voltage switch gear pipe valve of the present invention is as follows:
A kind of high-voltage switch gear pipe valve adopting aforesaid method process.
The surface hardness of the high-voltage switch gear pipe valve divide-shut brake pipeline section of high-voltage switch gear pipe valve preparation method of the present invention process is higher, between 45-50HRC, meet its requirement to wear resistance, and middle pipeline section and matrix hardness control between 32-39HRC, its demand to toughness can be met.Namely the part of carburizing has higher hardness, intensity and wear resistance, and do not have the part of carburizing while having enough hardness and intensity, have higher toughness, give full play to material potential, make pipe valve can not produce brittle cracking when shock motion, cause leakage of oil and impact to voltage switch point, combined floodgate performance.Meet the reliability requirement of high-voltage switch gear pipe valve, can guarantee the normal work of high-voltage switch gear hydraulic gear, and this processing method is simple to operate, production efficiency is higher, and tooling cost is lower.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high-voltage switch gear pipe valve blank of the embodiment of the present invention 1;
Fig. 2 is the shaping pipe valve Workpiece structure schematic diagram of the high-voltage switch gear pipe valve of the embodiment of the present invention 1.
Embodiment
Below by specific embodiment, technical scheme of the present invention is further described.
Embodiment 1
The high-voltage switch gear pipe valve preparation method of the present embodiment comprises the steps:
1) blank processing: by the blanking of high-voltage switch gear pipe valve, the concrete composition of material therefor, in table 1, goes out high-voltage switch gear pipe valve blank according to the Vehicle Processing of structure shown in Fig. 1.
Described high-voltage switch gear pipe valve blank comprises middle pipeline section and is connected to combined floodgate section and point lockage chamber at described middle pipeline section two ends, and on the outer tube wall of described combined floodgate section and point lockage chamber, technique allowance is 0.3mm, and the technique allowance of the outer tube wall of middle pipeline section is not less than 2mm;
Table 1
2) carburizing: by step 1) in the high-voltage switch gear pipe valve blank that obtains adopt case-hardening furnace to carry out carburizing at 910 DEG C, cementation zone is formed at injectron valve surface, depth of case is 0.9mm, and hole of carrying out after then stove is chilled to 830 DEG C coming out of the stove is chilled to room temperature, obtains carburizing pipe valve workpiece;
3) process: by step 2) the carburizing pipe valve workpiece that obtains processes shaping pipe valve workpiece according to structure shown in Fig. 2, add man-hour, the grinding process allowance of the outer tube wall of middle pipeline section is ground off a part, makes the outer tube wall of combined floodgate section, point lockage chamber and middle pipeline section all retain the grinding process allowance of 0.3mm;
Described high-voltage switch gear pipe valve is tubular structure, and comprise described middle pipeline section 1 and described combined floodgate section 2 and described point of lockage chamber 3, the outer tube wall diameter of combined floodgate section is less than middle pipeline section outer tube wall diameter, and the outer tube wall diameter of point lockage chamber is greater than middle pipeline section pipe outer diameter.The outer tube wall of high-voltage switch gear pipe valve combined floodgate section and point lockage chamber is valve port line part with the position of corresponding external parts top press-fit, as shown in A and B in Fig. 2.
4) quench: by step 3) in the shaping pipe valve workpiece that obtains adopt salt bath furnace to be heated to 860 DEG C, insulation 5min, in oil, be cooled to room temperature, must quench pipe valve workpiece;
5) tempering: by step 4) in the quenching pipe valve workpiece that obtains adopt box-type furnace tempering 90min at 500 DEG C, naturally cool to room temperature in atmosphere, obtain tempering pipe valve workpiece; Fine grinding, to obtain final product.
The high-voltage switch gear pipe valve adopting aforesaid method to obtain is the high-voltage switch gear pipe valve of the present embodiment.
Embodiment 2
The high-voltage switch gear pipe valve preparation method of the present embodiment comprises the steps:
1) blank processing: by the blanking of high-voltage switch gear pipe valve, the concrete composition of material therefor, in table 1, goes out high-voltage switch gear pipe valve blank according to the mode Vehicle Processing identical with embodiment 1.Described high-voltage switch gear pipe valve blank comprises middle pipeline section and is connected to combined floodgate section and point lockage chamber at described middle pipeline section two ends, and on the outer tube wall of described combined floodgate section and point lockage chamber, technique allowance is 0.2mm, and the technique allowance of the outer tube wall of middle pipeline section is not less than 2mm;
2) carburizing: by step 1) in the high-voltage switch gear pipe valve blank that obtains adopt pit carburizing furnace to carry out carburizing at 930 DEG C, cementation zone is formed at injectron valve surface, depth of case is 1.1mm, carries out coming out of the stove air cooling to room temperature after then stove is chilled to 500 DEG C, obtains carburizing pipe valve workpiece;
3) process: by step 2) the carburizing pipe valve workpiece that obtains processes shaping pipe valve workpiece according to the mode identical with embodiment 1; The grinding process allowance of combined floodgate section and point lockage chamber outer tube wall keeps 0.2mm, and the grinding process allowance of interlude outer tube wall also retains 0.2mm;
4) quench: by step 3) in the shaping pipe valve workpiece that obtains adopt box-type furnace to be heated to 840 DEG C, insulation 15min, in oil, be cooled to room temperature, must quench pipe valve workpiece;
5) tempering: by step 4) in the quenching pipe valve workpiece that obtains adopt box-type furnace tempering 60min at 520 DEG C, naturally cool to room temperature in atmosphere, obtain tempering pipe valve workpiece; Fine grinding, to obtain final product.
The high-voltage switch gear pipe valve adopting aforesaid method to obtain is the high-voltage switch gear pipe valve of the present embodiment.
Embodiment 3
The high-voltage switch gear pipe valve preparation method of the present embodiment comprises the steps:
1) blank processing: by the blanking of high-voltage switch gear pipe valve, the concrete composition of material therefor, in table 1, goes out high-voltage switch gear pipe valve blank according to the mode Vehicle Processing identical with embodiment 1.
Described high-voltage switch gear pipe valve blank comprises middle pipeline section and is connected to combined floodgate section and point lockage chamber at described middle pipeline section two ends, and on the outer tube wall of described combined floodgate section and point lockage chamber, technique allowance is 0.25mm, and the technique allowance of the outer tube wall of middle pipeline section is not less than 2mm;
2) carburizing: by step 1) in the high-voltage switch gear pipe valve blank that obtains adopt pit carburizing furnace to carry out carburizing at 920 DEG C, cementation zone is formed at injectron valve surface, depth of case is 1.0mm, carries out coming out of the stove air cooling to room temperature after then stove is chilled to 500 DEG C, obtains carburizing pipe valve workpiece;
3) process: by step 2) the carburizing pipe valve workpiece that obtains processes shaping pipe valve workpiece according to the mode identical with embodiment 1; Divide the grinding process allowance of lockage chamber and combined floodgate section outer tube wall to keep 0.25mm, the grinding process allowance of interlude outer tube wall also retains 0.25mm;
4) quench: by step 3) in the shaping pipe valve workpiece that obtains adopt salt bath furnace to be heated to 850 DEG C, insulation 4min, in oil, be cooled to room temperature, must quench pipe valve workpiece;
5) tempering: by step 4) in the quenching pipe valve workpiece that obtains adopt box-type furnace tempering 70min at 510 DEG C, naturally cool to room temperature in atmosphere, obtain tempering pipe valve workpiece; Fine grinding, to obtain final product.
The high-voltage switch gear pipe valve adopting aforesaid method to obtain is the high-voltage switch gear pipe valve of the present embodiment.
Embodiment 4
The high-voltage switch gear pipe valve preparation method of the present embodiment comprises the steps:
1) blank processing: by the blanking of high-voltage switch gear pipe valve, the concrete composition of material therefor, in table 2, goes out high-voltage switch gear pipe valve blank according to the mode Vehicle Processing identical with embodiment 1.
Described high-voltage switch gear pipe valve blank comprises middle pipeline section and is connected to combined floodgate section and point lockage chamber at described middle pipeline section two ends, and on the outer tube wall of described combined floodgate section and point lockage chamber, technique allowance is 0.25mm, and the technique allowance of the outer tube wall of middle pipeline section is not less than 2mm;
Table 2
2) carburizing: by step 1) in the high-voltage switch gear pipe valve blank that obtains adopt pit carburizing furnace to carry out carburizing at 920 DEG C, cementation zone is formed at injectron valve surface, depth of case is 1.0mm, carries out coming out of the stove air cooling to room temperature after then stove is chilled to 500 DEG C, obtains carburizing pipe valve workpiece;
3) process: by step 2) the carburizing pipe valve workpiece that obtains processes shaping pipe valve workpiece according to the mode identical with embodiment 1; The grinding process allowance of combined floodgate section and point lockage chamber outer tube wall keeps 0.25mm, and the grinding process allowance of interlude outer tube wall also retains 0.25mm;
4) quench: by step 3) in the shaping pipe valve workpiece that obtains adopt salt bath furnace to be heated to 840 DEG C, insulation 6min, in oil, be cooled to room temperature, must quench pipe valve workpiece;
5) tempering: by step 4) in the quenching pipe valve workpiece that obtains adopt box-type furnace tempering 70min at 510 DEG C, naturally cool to room temperature in atmosphere, obtain tempering pipe valve workpiece; Fine grinding, to obtain final product.
The high-voltage switch gear pipe valve adopting aforesaid method to obtain is the high-voltage switch gear pipe valve of the present embodiment.
Comparative example
The high-voltage switch gear pipe valve preparation method of the present embodiment comprises the steps:
1) blank processing: by the blanking of high-voltage switch gear pipe valve, the concrete composition of material therefor, in table 1, goes out high-voltage switch gear pipe valve blank according to the mode Vehicle Processing identical with embodiment 1.The technique allowance of high-voltage switch gear pipe valve blank is 0.3mm;
2) carburizing: by step 1) in the high-voltage switch gear pipe valve blank that obtains adopt case-hardening furnace to carry out carburizing at 910 DEG C, cementation zone is formed at injectron valve surface, depth of case is 0.9mm, and hole of carrying out after then stove is chilled to 830 DEG C coming out of the stove is chilled to room temperature, obtains carburizing pipe valve workpiece;
3) process: by step 2) the carburizing pipe valve workpiece that obtains processes shaping pipe valve workpiece according to the mode identical with embodiment 1; The grinding process allowance of combined floodgate section and point lockage chamber outer tube wall keeps 0.3mm, and the grinding process allowance on middle pipeline section outer tube wall also retains 0.3mm;
4) quench: by step 3) in the shaping pipe valve workpiece that obtains adopt box-type furnace to be heated to 860 DEG C, insulation 15min, then in oil, be cooled to room temperature, must quench pipe valve workpiece;
5) tempering: by step 4) in the quenching pipe valve workpiece that obtains adopt box-type furnace tempering 120min at 200 DEG C, naturally cool to room temperature in atmosphere, obtain tempering pipe valve workpiece, fine grinding, to obtain final product.
The high-voltage switch gear pipe valve adopting aforesaid method to obtain is the high-voltage switch gear pipe valve of this comparative example.
Experimental example
To heat treated its hardness of injectron valve test and the serviceability that adopt embodiment 1-4 and comparative example, concrete outcome is in table 3.
The test result of high-voltage switch gear pipe valve heat treated in table 3 embodiment 1-4 and comparative example
The high-voltage switch gear pipe valve of method process of the present invention finds through mechanical endurance test test, no matter be in rated oil pressure, voltage rating, or at high oil pressure, high-voltage, or to carry out under the condition such as low oil pressure, low voltage point, closing operation, divide, closing a floodgate puts in place flexibly, pipe valve situation without exception, mechanism's ne-leakage phenomenon, heap depression do not beaten by valve port line and Fragmentation Phenomena occurs, and meets the performance requriements that hydraulic gear is on active service completely.
Thermal treatment process multiplicity of the present invention is high, is easy to production operation, and part quality is stablized, safe and reliable in process under arms, and can guarantee normal point of high-voltage switch gear hydraulic gear, combined floodgate work, economic benefit is very remarkable.
Claims (10)
1. a high-voltage switch gear pipe valve preparation method, is characterized in that, comprises the steps:
1) machining blanks: blanking post-treatment obtains high-voltage switch gear pipe valve blank, described high-voltage switch gear pipe valve blank comprises middle pipeline section and is connected to combined floodgate section and point lockage chamber at described middle pipeline section two ends, and the technique allowance on the outer tube wall of described combined floodgate section and point lockage chamber is less than the technique allowance on the outer tube wall of described middle pipeline section;
2) carburizing: by step 1) the high-voltage switch gear pipe valve blank that obtains carries out carburizing and forms cementation zone at 910-930 DEG C, and cooling, obtains carburizing pipe valve workpiece; The thickness of described cementation zone is greater than the technique allowance on the outer tube wall of described combined floodgate section and point lockage chamber, is less than the technique allowance on the outer tube wall of described middle pipeline section;
3) machine-shaping: by step 2) in the carburizing pipe valve workpiece that obtains carry out machine-shaping and obtain shaping pipe valve workpiece, described machine-shaping comprises the technique allowance in the middle of turning on pipeline section outer tube wall, makes the residue technique allowance of middle pipeline section outer tube wall identical with combined floodgate section outer tube wall technique allowance with point lockage chamber;
4) quench: by step 3) in the shaping pipe valve workpiece heat that obtains be incubated 4-16min to 840-860 DEG C, cool in oil, must quench pipe valve workpiece;
5) tempering: by step 4) the quenching pipe valve workpiece that obtains is at 500-520 DEG C of tempering 60-90min, and cooling, obtains tempering pipe valve workpiece, and fine grinding, to obtain final product.
2. high-voltage switch gear pipe valve preparation method as claimed in claim 1, it is characterized in that, the material of described high-voltage switch gear pipe valve is 20CrMnMo.
3. high-voltage switch gear pipe valve preparation method as claimed in claim 1, is characterized in that, the large 0.6-0.9mm of technique allowance on the outer tube wall of the section of combined floodgate described in the Thickness Ratio of described cementation zone and point lockage chamber.
4. high-voltage switch gear pipe valve preparation method as claimed in claim 3, it is characterized in that, on the outer tube wall of described combined floodgate section and point lockage chamber, technique allowance is 0.2-0.3mm, and the outer tube wall technique allowance of described middle pipeline section is for being not less than 2.0mm, and the thickness of described cementation zone is 0.9-1.1mm.
5. high-voltage switch gear pipe valve preparation method as claimed in claim 1, is characterized in that, described step 2) in cooling be go out the cold or stove of space for collecting ashes in a stove after adopting stove to be chilled to 830 DEG C to be chilled to come out of the stove after below 500 DEG C and to carry out air cooling.
6. high-voltage switch gear pipe valve preparation method as claimed in claim 1, is characterized in that, described step 2) in carburizing use case-hardening furnace or pit carburizing furnace to carry out carburizing treatment.
7. high-voltage switch gear pipe valve preparation method as claimed in claim 1, it is characterized in that, described step 4) in heating adopt salt bath furnace or box-type furnace, when adopting salt bath furnace heating, soaking time is 4-6min, and when adopting box-type furnace heating, soaking time is 14-16min.
8. high-voltage switch gear pipe valve preparation method as claimed in claim 7, is characterized in that, described step 4) in when adopting salt bath furnace heating soaking time be 5min, when adopting box-type furnace heating, soaking time is 15min.
9. high-voltage switch gear pipe valve preparation method as claimed in claim 1, is characterized in that, described step 5) in be cooled to and naturally cool to room temperature in atmosphere.
10. the high-voltage switch gear pipe valve obtained by preparation method as claimed in claim 1.
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| CN201510577325.0A CN105177494B (en) | 2015-09-11 | 2015-09-11 | High-voltage switch gear pipe valve preparation method and high-voltage switch gear pipe valve |
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| CN201510577325.0A CN105177494B (en) | 2015-09-11 | 2015-09-11 | High-voltage switch gear pipe valve preparation method and high-voltage switch gear pipe valve |
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| CN105177494A true CN105177494A (en) | 2015-12-23 |
| CN105177494B CN105177494B (en) | 2017-10-10 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168795A (en) * | 2007-11-29 | 2008-04-30 | 泰州市三精机械制造有限公司 | Carburization quenching method for round hole thin wall work-piece |
| CN102465249A (en) * | 2010-11-19 | 2012-05-23 | 沈志刚 | High-pressure resisting hard sealing manual flat valve |
| CN103233165A (en) * | 2013-04-28 | 2013-08-07 | 江苏金石铸锻有限公司 | High-pressure valve material and heat treatment method thereof |
| CN104532180A (en) * | 2014-12-19 | 2015-04-22 | 洛阳轴研科技股份有限公司 | Integrated carburizing process of gear ring and ferrule of turntable bearing |
-
2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168795A (en) * | 2007-11-29 | 2008-04-30 | 泰州市三精机械制造有限公司 | Carburization quenching method for round hole thin wall work-piece |
| CN102465249A (en) * | 2010-11-19 | 2012-05-23 | 沈志刚 | High-pressure resisting hard sealing manual flat valve |
| CN103233165A (en) * | 2013-04-28 | 2013-08-07 | 江苏金石铸锻有限公司 | High-pressure valve material and heat treatment method thereof |
| CN104532180A (en) * | 2014-12-19 | 2015-04-22 | 洛阳轴研科技股份有限公司 | Integrated carburizing process of gear ring and ferrule of turntable bearing |
Non-Patent Citations (1)
| Title |
|---|
| 孙喜平等: "《热处理工工艺入门》", 31 August 2008 * |
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