CN102382968A - Method for improving performances of special spring through vacuum heat post-treatment - Google Patents
Method for improving performances of special spring through vacuum heat post-treatment Download PDFInfo
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- CN102382968A CN102382968A CN2010102674316A CN201010267431A CN102382968A CN 102382968 A CN102382968 A CN 102382968A CN 2010102674316 A CN2010102674316 A CN 2010102674316A CN 201010267431 A CN201010267431 A CN 201010267431A CN 102382968 A CN102382968 A CN 102382968A
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Abstract
The invention provides a method for improving performances of a special spring through vacuum heat post-treatment. The method is a vacuum quenching post-treatment method of a high-temperature resistant and high strength special spring. The method comprises the following steps of 1, detecting a physical dimension of a special spring needing to be subjected to vacuum quenching, 2, clamping the special spring subjected to vacuum quenching by a special clamp, putting the special spring subjected to vacuum quenching and the special clamp into a vacuum tempering furnace together, and carrying out normal tempering according to technical requirements, 3, placing the special spring subjected to vacuum tempering between two flat plates of a press, compressing the special spring subjected to vacuum tempering to a limit position by a special process, and keeping state stabilization, and 4, putting the special spring treated by the step 3 into the special clamp, and measuring special spring surface hardness, special spring core hardness, special spring work height and special spring work spacing when the special spring treated by the step 3 recovers to a free state. The method provided by the invention has the advantages that through the simple and effective steps, creep deformation and relaxation of a high-temperature resistant and high strength special spring in a working state are prevented; special spring integrated performances are greatly improved; in subsequent physical production and use, possibilities of a premature failure and scrapping of a special spring in a service stage is not increased; and a product qualifying rate is greatly improved.
Description
Technical field
The present invention relates to a kind of method that improves performance after the high-temp and high-strength Special spring vacuum heat treatment, be used for the qualification rate of high temperature resistance, anti-fatigue performance and the product of enhancing high temperature high-strength special type spring after vacuum heat treatment.
Background technology
In the prior art; The high-temp and high-strength Special spring adopts the two chamber pressurization of advanced high vacuum oil quenching thermal treatment process both at home and abroad, and wherein the physical dimension of high-temp and high-strength Special spring is diameter 63mm (internal diameter ￠ 37mm), height 84 ± 1mm; Line footpath ￠ 13-14mm; Occur working face and spring shed after the vacuum heat treatment apart from torsional deformation, the thermostability control difficulty with working order after the thermal treatment of size is bigger, causes the qualification rate of high-temp and high-strength Special spring on the low side; Be merely about 82%, have in addition scrap or phase premature failure under arms.
Summary of the invention
The purpose of this invention is to provide a kind of high-temp and high-strength Special spring VACUUM HEAT-TREATMENT technology, with raising, high temperature resistance, anti-fatigue performance and the product percent of pass of enhancing high temperature high-strength special type spring after vacuum heat treatment.
In order to achieve the above object, technical scheme of the present invention provides a kind of high-temp and high-strength Special spring vacuum heat treatment frock clamping, processing parameter and unique shaping process, and its characteristic and concrete steps are:
The first step: pending VACUUM HEAT-TREATMENT high-temp and high-strength Special spring before the heat is pressed 20% proportional sampling, with cubing detection line footpath, free height, the size of shed distance, and carry out stepping;
Second step: in the special frock clamp of will packing into, put into vacuum dual-chamber pressurization oil quenching furnace, set heating, insulation, come in and go out heating chamber, precooling, oil quenchinng, fuel-displaced time, oil filtration time, processing parameter such as come out of the stove;
The 3rd step: with the high-temp and high-strength Special spring after the vacuum heat treatment quenching; Be one group with per 6 and put into special-purpose anchor clamps; Utilize the location axle to confirm two distances (this distance is of a size of high-temp and high-strength Special spring free size good for delivery) between the flat board; Use the contract piece on the unit clamp that high-temp and high-strength Special spring group is carried out clamping, fixing, after the clamping above-mentioned unit clamp and high-temp and high-strength Special spring group integral body are put into vacuum tempering furnace is no less than 3 times by technical requirements normalized tempering.
The 4th step: the high-temp and high-strength Special spring behind the vacuum tempering is put between two flat boards of special oil press, and the oil pressure that uses 28-30MPa is compressed to the limit position of stage clip with high-temp and high-strength Special spring room temperature cold conditions, stops 3 minutes with steady state;
The 5th step: once more the high-temp and high-strength Special spring is one group with per 6 and puts into special-purpose anchor clamps; Press down the position that is reduced to high-temp and high-strength Special spring free size good for delivery at middle temperature state, measure surface and centre hardness, operating altitude and the shed distance of high-temp and high-strength Special spring when returning to free state.
Unit clamp described in the 3rd step of concrete steps comprises upper and lower base plate; Base plate is provided with the fixedly rod iron of four vertical distribution; Rod iron top processes groove; High-temp and high-strength Special spring to be positioned evenly is placed on the lower plate and presses upper plate, use the contract piece that unit clamp and high-temp and high-strength Special spring are fixed.
The invention has the advantages that: in the VACUUM HEAT-TREATMENT technical process; Through simple, effective step; Creep when preventing the work of high-temp and high-strength Special spring is with lax; Pressurize, heat and handle and the creep resistance tempering, improved the proportionality limit of high-temp and high-strength Special spring and the over-all propertieies such as ability of high temperature carry load greatly, avoid increasing the possibility that the age premature failure occurs and scrap when follow-up actual production is used.
Description of drawings
Fig. 1 is a high-temp and high-strength Special spring height dimension appliance special for detecting structural representation;
Fig. 2 is a high-temp and high-strength Special spring verticality size appliance special for detecting structural representation;
Fig. 3 is the special-purpose shaping device structure of high-temp and high-strength Special spring and uses synoptic diagram.
Embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment
The client provided treat that VACUUM HEAT-TREATMENT high-temp and high-strength Special spring 1 uses appliance special for detecting to detect the ratio sampling observation geometrical dimension (planeness between line footpath, free height, pitch uniformity coefficient, verticality, external diameter and internal diameter, the two ends circle) by 10%, the position and the direction of the overproof largest portion of demarcation geometrical dimension on technology is single; Shown in Fig. 1-2, be each appliance special for detecting structural representation.
Be illustrated in figure 3 as special-purpose shaping device structural representation; With the high-temp and high-strength Special spring after the vacuum heat treatment quenching; With per 6 is on one group of lower plate 1 of putting into special-purpose shaping device; The distance of utilizing location axle 2 to confirm between upper plate 1 and 3 liang of flat boards of lower plate; Use 4 pairs of high-temp and high-strength Special springs of the contract piece group on the unit clamp to carry out clamping, fixing, after the clamping above-mentioned unit clamp and high-temp and high-strength Special spring group whole 5 are put into vacuum tempering furnace and carry out being incubated under the 560-580 ℃ of temperature 3hour by technical requirements and be no less than 3 times normalized tempering.
High-temp and high-strength Special spring behind the vacuum tempering is put between two flat boards of special oil press, and the oil pressure that uses 28-30MPa is compressed to the limit position of stage clip with high-temp and high-strength Special spring room temperature cold conditions, stops 3 minutes with steady state;
Once more the high-temp and high-strength Special spring is one group with per 6 and puts into special-purpose shaping device; Under the state of 500 ℃ of temperature insulation 4hour, get into vacuum tempering furnace and carry out tempering; Be compressed to the position of high-temp and high-strength Special spring free size good for delivery, execute and use after the processing sequence high pure nitrogen to be cooled to room temperature to come out of the stove.
With the high-temp and high-strength Special spring 1 after vacuum heat treatment and the isolated plant processing, re-use appliance special for detecting and detect the ratio detection geometrical dimension (detection of planeness, surface and centre hardness, metallographic structure and grain fineness number between line footpath, free height, pitch uniformity coefficient, verticality, external diameter and internal diameter, the two ends circle when returning to free state by 100%.
Said upper and lower flat board of this special-purpose shaping device and rod are respectively the thick and ￠ 20mm of 25mm; Material is that Japanese trade mark SKD11 cold-working steel is made, and hardness is 44-46HRC after vacuum heat treatment, satisfies the needs of process for processing fully; Through inlet postpartum, the product export qualification rate rises to more than 98%.
Claims (1)
1. Effect on Performance experimental technique after the high-temp and high-strength Special spring vacuum heat treatment is characterized in that concrete steps are:
The first step: will treat that VACUUM HEAT-TREATMENT high-temp and high-strength Special spring (1) detects geometrical dimension with appliance special for detecting, and the position and the direction of on technology is single, demarcating the overproof largest portion of geometrical dimension;
Second step: in the special frock clamp (2) of will packing into, put into vacuum dual-chamber pressurization oil quenching furnace, set heating, insulation, come in and go out heating chamber, precooling, oil quenchinng, fuel-displaced time, oil filtration time, processing parameter such as come out of the stove;
The 3rd step: with the high-temp and high-strength Special spring after the vacuum heat treatment quenching; To put into special-purpose shaping device; Utilize the location axle to confirm two distances between the flat board; Use the contract piece on the unit clamp that high-temp and high-strength Special spring group is carried out clamping, fixing, after the clamping above-mentioned unit clamp and high-temp and high-strength Special spring group integral body are put into vacuum tempering furnace is no less than 3 times by technical requirements normalized tempering.
The 4th step: the high-temp and high-strength Special spring behind the vacuum tempering is put between two flat boards of special oil press, and the oil pressure that uses 28-30MPa is compressed to the limit position of stage clip with high-temp and high-strength Special spring room temperature cold conditions, stops 3 minutes with steady state;
The 5th step: once more the high-temp and high-strength Special spring is put into special-purpose anchor clamps; Press down the position that is reduced to high-temp and high-strength Special spring free size good for delivery at middle temperature state, measure surface and centre hardness, operating altitude and the shed distance of high-temp and high-strength Special spring when returning to free state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102674316A CN102382968A (en) | 2010-08-27 | 2010-08-27 | Method for improving performances of special spring through vacuum heat post-treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102674316A CN102382968A (en) | 2010-08-27 | 2010-08-27 | Method for improving performances of special spring through vacuum heat post-treatment |
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| CN102382968A true CN102382968A (en) | 2012-03-21 |
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| CN2010102674316A Pending CN102382968A (en) | 2010-08-27 | 2010-08-27 | Method for improving performances of special spring through vacuum heat post-treatment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436689A (en) * | 2013-09-09 | 2013-12-11 | 苏州热工研究院有限公司 | Processing method for recovering hardness performance of SA335-P91 steel for power stations |
| CN105296734A (en) * | 2015-11-20 | 2016-02-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Heat treatment setting method for high-strength elastic material coil spring |
| CN106435142A (en) * | 2016-11-29 | 2017-02-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Thermal-treatment shaping method for high-strength elastic material end surface spring |
| CN106555044A (en) * | 2015-09-24 | 2017-04-05 | 沈阳斯普瑞机械加工有限公司 | A kind of wavy spring sizing tempering process |
| CN108846836A (en) * | 2018-05-31 | 2018-11-20 | 慕贝尔汽车部件（太仓）有限公司 | Spring detection device, spring detection method and device |
-
2010
- 2010-08-27 CN CN2010102674316A patent/CN102382968A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436689A (en) * | 2013-09-09 | 2013-12-11 | 苏州热工研究院有限公司 | Processing method for recovering hardness performance of SA335-P91 steel for power stations |
| CN103436689B (en) * | 2013-09-09 | 2015-03-18 | 苏州热工研究院有限公司 | Processing method for recovering hardness performance of SA335-P91 steel for power stations |
| CN106555044A (en) * | 2015-09-24 | 2017-04-05 | 沈阳斯普瑞机械加工有限公司 | A kind of wavy spring sizing tempering process |
| CN105296734A (en) * | 2015-11-20 | 2016-02-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Heat treatment setting method for high-strength elastic material coil spring |
| CN106435142A (en) * | 2016-11-29 | 2017-02-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Thermal-treatment shaping method for high-strength elastic material end surface spring |
| CN108846836A (en) * | 2018-05-31 | 2018-11-20 | 慕贝尔汽车部件（太仓）有限公司 | Spring detection device, spring detection method and device |
| CN108846836B (en) * | 2018-05-31 | 2021-04-02 | 慕贝尔汽车部件（太仓）有限公司 | Spring detection equipment, spring detection method and device |
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Application publication date: 20120321 |