CN106498142A - A kind of stress shot blasting method in variable cross-section reed with high strength manufacture - Google Patents
A kind of stress shot blasting method in variable cross-section reed with high strength manufacture Download PDFInfo
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Abstract
The present invention relates to the stress shot blasting method in a kind of variable cross-section reed with high strength manufacture, it sequentially includes：1）Reed blanking, 2）Variable cross-section shaping, 3）Quenching and tempering process, 4）Again temper stress shot-peening, 5）The steps such as control cooling.The present invention optimizes and improves the stress shot blasting method in variable cross-section reed with high strength manufacture, it is applied to all kinds of variable cross-section reed with high strength, such as 60Si2CrVA, 50CrV, 50CrV4, 51CrMoV4, the variable cross-section reed with high strength of multiple spring steel makings such as 55SiMnVB, stress shot blasting is carried out to reed under temperature again, and the return action after Plastic Deformation of Surface Layer and the release of residual stress can be suppressed using Cooling Mode after shot-peening, thus reed top layer can be made to there is working hardening effect and obtain higher reed Residual stress of superficial layer, and it is more abundant to be tempered microscopic structure, thus ability and the fatigue life of the stress relaxation-resistant of reed can further improve, meet the lightweight of automobile, long-life and raising comfortableness etc. require.
Description
Technical field
The present invention relates to the stress shot blasting method in a kind of manufacture of variable cross-section reed with high strength, the method that especially relates to carry out stress shot blasting under higher bending stress and at higher temperature to more than 1800MPa variable cross-section reed with high strength.
Background technology
Reed number of the high intensity Few Leaf Spring in design due to having is few, lightweight, can bear higher stress and the advantages of good ride comfort, to realizing car load lightweight and improving car load ride comfort and riding comfort tool is of great significance.But, after being improved due to intensity, under high-stress state, spring surface situation is dramatically increased to the sensitivity of Influence of Fatigue Properties, it is thus desirable to being optimized to its stress shot peening method and improving, to obtain the residual compressive stress on more preferable surface quality, deeper and higher top layer, the fatigue behaviour of reed is improved.
Content of the invention
The purpose of the present invention, exactly in order to solve above-mentioned technical problem, and provides a kind of stress shot blasting method born in heavily stressed variable cross-section reed with high strength manufacture.
In order to realize that foregoing invention purpose, the present invention are adopted the following technical scheme that：Stress shot blasting method in a kind of variable cross-section reed with high strength manufacture, it is characterised in that comprise the following steps：1）Reed blanking, 2）Variable cross-section shapes, and 3）Quenching, temper, 4）Temper stress shot-peening again, 5）Control cooling；Wherein in temper stress blasting process again, reed is placed under the bending stress of more than 1000MPa, reed temperature is heated to 350 DEG C～520 DEG C, and the temperature less than reed then（Temperature refers to step 3）In temper operation temperature）, then adopt the shot of a diameter of 0.5mm～1.5mm to carry out shot-peening 5～30 minutes with the speed of 50～150m/s to the tension stress face of reed.
Stress shot blasting method in a kind of aforesaid variable cross-section reed with high strength manufacture, carries out intensive treatment using temper stress blasting process again to reed top layer after reed blanking, variable cross-section shaping and quenching, temper operation；Wherein, quenching, tempering process are, 850 DEG C～950 DEG C of hardening heat, and after being incubated 20～50 minutes, oil cooling, temperature are 350 DEG C～550 DEG C, are incubated 90～180 minutes.
Stress shot blasting method in a kind of aforesaid variable cross-section reed with high strength manufacture, step 5）Reed is cooled to by room temperature using the Cooling Mode of air-cooled or water-cooled, and rate of cooling is controlled more than 2 DEG C/s.
Stress shot blasting method in a kind of aforesaid variable cross-section reed with high strength manufacture, described reed are placed under the bending stress of 1250MPa.
Stress shot blasting method in a kind of aforesaid variable cross-section reed with high strength manufacture, described variable cross-section reed with high strength refer to the variable cross-section reed with high strength of more than 1800MPa levels.
Stress shot blasting method in a kind of aforesaid variable cross-section reed with high strength manufacture, in the described blasting process of temper stress again, reed is placed under the bending stress of 1250MPa, then reed temperature is heated to 490 DEG C, then adopt the shot of a diameter of 0.8mm～1.0mm shot-peening to be carried out 15 minutes with the speed of 100m/s to the tension stress face of reed.
The invention has the beneficial effects as follows：1）For all kinds of variable cross-section reed with high strength, the variable cross-section reed with high strength of such as multiple spring steel makings such as 60Si2CrVA, 50CrV, 50CrV4,51CrMoV4,55SiMnVB, the technical method of the present invention can be adopted, is played a part of to improve the surface quality of reed and is increased reed Residual stress of superficial layer；2）Stress shot blasting is carried out to reed under temperature again, due to temperature higher than traditional stress shot blasting temperature, the plastic deformation degree on reed top layer is big, and the return action after Plastic Deformation of Surface Layer and the release of residual stress can be suppressed using Cooling Mode after shot-peening, reed top layer thus can be made to there is working hardening effect and obtain higher reed Residual stress of superficial layer（Spring surface longitudinal direction residual compressive stress can reach more than 1000MPa）；3）Stress shot blasting is carried out to reed under temperature again, harmful residual stress when reed quenches can also be further eliminated, and it is more abundant to be tempered microscopic structure；4）Summary effect, can further improve ability and the fatigue life of the stress relaxation-resistant of reed, thus meets lightweight, long-life and raising comfortableness of automobile etc. and requires.
Specific embodiment
The present invention in actual use, using 60Si2CrVA spring steel, is sequentially shaped through reed blanking, variable cross-section, quenching and tempering process, the again operation such as temper stress shot-peening, control cooling.In described Q-tempering treatment process, hardening heat is 920 DEG C, is incubated 35 minutes, oil cooling, and temperature is 490 DEG C, is incubated 120 minutes.In the described blasting process of temper stress again, reed is placed under the bending stress of 1250MPa, then reed temperature is heated to 490 DEG C, then adopt the shot of a diameter of 0.8mm～1.0mm shot-peening to be carried out 15 minutes with the speed of 100m/s to the tension stress face of reed.After the described blasting process of temper stress again, reed is cooled to by room temperature using the Cooling Mode of air-cooled or water-cooled, and rate of cooling is controlled more than 2 DEG C/s.
Ultimate principle, principal character and the advantage of the present invention has been shown and described above.It should be understood by those skilled in the art that; the present invention is not restricted to the described embodiments; merely illustrating the principles of the invention described in above-described embodiment and description; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements are both fallen within scope of the claimed invention.The claimed scope of the invention is by appending claims and its equivalent thereof.
Claims (6)
1. the stress shot blasting method during a kind of variable cross-section reed with high strength is manufactured, it is characterised in that comprise the following steps：1）Reed blanking, 2）Variable cross-section shapes, and 3）Quenching, temper, 4）Temper stress shot-peening again, 5）Control cooling；Wherein in temper stress blasting process again, reed is placed under the bending stress of more than 1000MPa, then reed temperature is heated to 350 DEG C～520 DEG C, and the temperature less than reed, then the shot of a diameter of 0.5mm～1.5mm is adopted to carry out shot-peening 5～30 minutes with the speed of 50～150m/s to the tension stress face of reed.
2. the stress shot blasting method during a kind of variable cross-section reed with high strength according to claim 1 is manufactured, it is characterised in that：Intensive treatment is carried out to reed top layer using temper stress blasting process again after reed blanking, variable cross-section shaping and quenching, temper operation；Wherein, quenching, tempering process are, 850 DEG C～950 DEG C of hardening heat, and after being incubated 20～50 minutes, oil cooling, temperature are 350 DEG C～550 DEG C, are incubated 90～180 minutes.
3. the stress shot blasting method during a kind of variable cross-section reed with high strength according to claim 1 and 2 is manufactured, it is characterised in that step 5）Reed is cooled to by room temperature using the Cooling Mode of air-cooled or water-cooled, and rate of cooling is controlled more than 2 DEG C/s.
4. the stress shot blasting method during a kind of variable cross-section reed with high strength according to claim 1 is manufactured, it is characterised in that in temper stress blasting process again, reed temperature is heated to 490 DEG C.
5. the stress shot blasting method during a kind of variable cross-section reed with high strength according to claim 1 is manufactured, it is characterised in that described variable cross-section reed with high strength refers to the variable cross-section reed with high strength of more than 1800MPa levels.
6. the stress shot blasting method during a kind of variable cross-section reed with high strength according to claim 1 is manufactured, it is characterized in that, in the described blasting process of temper stress again, reed is placed under the bending stress of 1250MPa, then reed temperature is heated to 490 DEG C, then adopt the shot of a diameter of 0.8mm～1.0mm shot-peening to be carried out 15 minutes with the speed of 100m/s to the tension stress face of reed.
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| CN201510561109.7A CN106498142A (en) | 2015-09-07 | 2015-09-07 | A kind of stress shot blasting method in variable cross-section reed with high strength manufacture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108869594A (en) * | 2018-06-21 | 2018-11-23 | 南京依维柯汽车有限公司 | A kind of high stress, the variable cross-section single-leaf spring and its manufacturing method of high life |
| CN114134291A (en) * | 2021-12-01 | 2022-03-04 | 南京工程学院 | A method for improving the fatigue life of high-strength and variable-section transverse leaf springs |
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| KR101330284B1 (en) * | 2011-11-29 | 2013-11-15 | 주식회사 포스코 | Method for manufacturing formable hot-rolled steel having excellent surface quality and the hot-rolled steel by the same method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108869594A (en) * | 2018-06-21 | 2018-11-23 | 南京依维柯汽车有限公司 | A kind of high stress, the variable cross-section single-leaf spring and its manufacturing method of high life |
| CN114134291A (en) * | 2021-12-01 | 2022-03-04 | 南京工程学院 | A method for improving the fatigue life of high-strength and variable-section transverse leaf springs |
| CN114134291B (en) * | 2021-12-01 | 2023-03-24 | 南京工程学院 | Method for prolonging fatigue life of high-strength variable-cross-section transverse plate spring |
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