阅读说明：本技术 一种防腐蚀耐疲劳减震弹簧的制备方法 (A kind of preparation method of anticorrosion endurance damping spring ) 是由 李孙德 于 2019-09-17 设计创作，主要内容包括：本发明主要涉及机械零件加工技术领域,公开了一种防腐蚀耐疲劳减震弹簧的制备方法,包括：清洗、抛光、渗碳、一次淬火、渗氮、二次淬火、回火、后处理；本发明提供的防腐蚀耐疲劳减震弹簧的制备方法,制备得到的弹簧,强度高,防腐蚀能力强,暴露空气中不易出现腐蚀现象,形变能力和抗疲劳性能强,使用一段时间后仍然具有较好的减震效果,能够提高驾驶舒适度。(The invention mainly relates to machine components processing technique fields, disclose a kind of preparation method of anticorrosion endurance damping spring, comprising: cleaning, polishing, carburizing, primary quenching, nitriding, secondary quenching, tempering, post-processing；The preparation method of anticorrosion endurance damping spring provided by the invention, the spring being prepared, intensity is high, anti-corrosion capability is strong, corrosion phenomenon is less prone in exposure air, deformability and anti-fatigue performance are strong, still have preferable damping effect after a period of use, can be improved driving comfort.)

1. a kind of preparation method of anticorrosion endurance damping spring, which comprises the following steps:

(1) it cleans: 8 ~ 10min of ultrasonic cleaning is carried out using sodium bicarbonate solution to damping spring after molding, frequency is 28 ~ 30kHz is rinsed with clear water again after taking-up, obtains cleaning spring；

(2) it polishes: cleaning spring being subjected to ultrasonic polishing, is rinsed well after the completion of polishing using clear water, is dried, obtain polishing bullet Spring；

(3) carburizing: polishing spring is placed in vacuum drying oven, is first heated to 360 ~ 400 DEG C with the speed of 3 ~ 4 DEG C/min, and heat preservation 50 ~ 60min, then 830 ~ 870 DEG C are heated to the speed of 2 ~ 3 DEG C/min, it is passed through carbon dioxide, keeps 120 ~ 150min of temperature, it is natural It is down to room temperature, obtains carburizing spring；

(4) primary quenching: carburizing spring being taken out, is placed in quenching liquid, is down to 290 ~ 350 DEG C to temperature, is kept the temperature 30 ~ 40min, It is down to room temperature naturally again, obtains primary quenching spring；

(5) nitriding: primary quenching spring is placed in vacuum drying oven, is first heated to 790 ~ 840 DEG C with the speed of 4 ~ 5 DEG C/min, is protected 40 ~ 50min of temperature, then 520 ~ 550 DEG C are cooled to the speed of 2 ~ 3 DEG C/min, it is passed through ammonia, keeps 180 ~ 210min of temperature, from It so is down to room temperature, obtains nitriding spring；

(6) secondary quenching: being heated to 420 ~ 460 DEG C for nitriding spring with the speed of 4 ~ 5 DEG C/min, keep the temperature 60 ~ 80min, followed by It is continuous to be heated to 970 ~ 1020 DEG C, 30 ~ 40min is kept the temperature, is taken out, is placed in the quenching liquid, is down to room temperature naturally, obtain secondary quenching Spring；

(7) it is tempered: secondary quenching spring being heated to 560 ~ 600 DEG C with the speed of 2 ~ 3 DEG C/min, keeps the temperature 30 ~ 40min, it is natural 230 ~ 270 DEG C are cooled to, 20 ~ 30min is kept the temperature, is down to room temperature naturally, obtains tempering spring；

(8) it post-processes: tempering spring being heated to 110 ~ 130 DEG C, oil surface is down to room temperature naturally, obtains anticorrosion endurance Damping spring.

2. the preparation method of anticorrosion endurance damping spring according to claim 1, which is characterized in that the step (1) Sodium bicarbonate solution, quality variation concentration be 4 ~ 5%, temperature be 50 ~ 55 DEG C.

3. the preparation method of anticorrosion endurance damping spring according to claim 1, which is characterized in that the step (2) Ultrasonic polishing, frequency be 23 ~ 25kHz, polishing fluid is cerium oxide polishing slurry.

4. the preparation method of anticorrosion endurance damping spring according to claim 1, which is characterized in that the step (3) Carbon dioxide, when 1 ~ 40min, flow is 5.2 ~ 5.6m³When/h, 41 ~ 90min, flow is 4.1 ~ 4.4m³/ h, remaining time Interior, flow is 3.3 ~ 3.5m³/h。

5. the preparation method of anticorrosion endurance damping spring according to claim 1, which is characterized in that the step (4) Quenching liquid, nano oxidized zinc solution, the preparation method comprises the following steps: the nano zine oxide that partial size is 1 ~ 3nm is placed in water, in 60 ~ 70r/min stirs 20 ~ 30min, obtains quenching liquid.

6. the preparation method of anticorrosion endurance damping spring according to claim 1, which is characterized in that the step (5) Ammonia, when 1 ~ 80min, flow is 14 ~ 15m³When/h, 81 ~ 150min, flow is 10 ~ 11m³/ h, in the remaining time, flow For 6 ~ 7m³/h。

7. the preparation method of anticorrosion endurance damping spring according to claim 1, which is characterized in that the step (8) Oil surface, with a thickness of 8 ~ 10 μm.

8. the anticorrosion that a kind of preparation method of any one of claim 1 ~ 7 anticorrosion endurance damping spring is prepared Endurance damping spring.

Technical field

The invention mainly relates to machine components processing technique field more particularly to a kind of anticorrosion endurance damping springs Preparation method.

Background technique

Damper be for inhibiting concussion when rebounding after spring shock-absorbing and from the impact on road surface, be widely used in automobile and Motorcycle, for the decaying for accelerating vehicle frame and body vibrations, to improve ride of vehicle, when by uneven road surface, though Right shock-absorbing spring can filter the vibration on road surface, but spring itself also has reciprocating motion, and damper is exactly for inhibiting this The jump of kind of spring, if damper is too soft, vehicle body will vertical bounce, damper can bring about very much too big resistance firmly, hampers Spring is hindered to work normally, hard damper will mutually arrange in pairs or groups with hard spring, and the hardness of spring and car weight are closely bound up, therefore In the driving process of vehicle, damping spring in order to reduce vehicle body vibration and repeatedly generation elongation and shrink, it is necessary to spring With preferable anti-fatigue performance, to keep preferable deformation and damping performance, and vehicle moment exposure in use It in external environment, often by the ejection of stone etc. and collides with, has in contact environment again after damage of colliding with corrosive Pollutant just often will appear rust corrosion phenomenon, not only influence appearance, it is most important that make the flexibility drop for extending and shrinking It is low, it is decreased obviously damping effect, influences the driving comfort sense of vehicle.

Existing patent document CN108866524A discloses a kind of method of automobile absorber spring preservative treatment, specific public It has opened and pickling first is carried out to absorber spring, then washed again, carry out blackening process and Seal treatment after drying again, prepared Although obtained absorber spring can play certain anti-corrosion effect, after a period of use, especially driving process The middle magnetic oxygenated iron layer of nigrescence that spring surface adheres to after the hard object high speed ejection such as stone is easy to make bullet because of impaired and peeling The anti-corrosion effect of spring is substantially reduced, and method disclosed in patent document can only temporarily improve anti-corrosion effect, resist to spring Tired effect does not play improvement effect.

Summary of the invention

In order to make up the defect of prior art, the object of the present invention is to provide a kind of systems of anticorrosion endurance damping spring Preparation Method.

A kind of preparation method of anticorrosion endurance damping spring, comprising the following steps:

(1) it cleans: 8 ~ 10min of ultrasonic cleaning is carried out using sodium bicarbonate solution to damping spring after molding, frequency is 28 ~ 30kHz is rinsed with clear water again after taking-up, can remove the spot on formed spring surface, is improved the treatment effect in later period, is obtained Clean spring；

(2) it polishes: cleaning spring being subjected to ultrasonic polishing, is rinsed well after the completion of polishing using clear water, is dried, make spring surface Smooth, when can reduce spring-compressed between the frictional force and spring and damper of spring itself frictional force to spring and subtracts Shake device plays preferable protecting effect, obtains polishing spring；

(3) carburizing: polishing spring is placed in vacuum drying oven, is first heated to 360 ~ 400 DEG C with the speed of 3 ~ 4 DEG C/min, and heat preservation 50 ~ 60min, then 830 ~ 870 DEG C are heated to the speed of 2 ~ 3 DEG C/min, keep spring internal and external temperature consistent, be passed through carbon dioxide, keeps 120 ~ 150min of temperature is first passed through the carbon dioxide of larger flow, makes quickly to penetrate into spring full of carbon dioxide as early as possible in furnace Surface makes carbon dioxide slowly penetrate spring inner with the extension of time, the flow of carbon dioxide is gradually gradually reduced, and keeps away It is cracked to exempt from inside, improves the intensity and anti-fatigue performance of spring, keeps preferable retractility, be down to room temperature naturally, must seep Carbon spring；

(4) primary quenching: carburizing spring being taken out, is placed in quenching liquid, is down to 290 ~ 350 DEG C to temperature, is kept the temperature 30 ~ 40min, It is down to room temperature naturally again, makes spring from austenite to martensite transfor mation, reduce lattice partial size, improve the intensity of spring, avoid bullet There is inelastic deformation in spring, obtains primary quenching spring；

(5) nitriding: primary quenching spring is placed in vacuum drying oven, is first heated to 790 ~ 840 DEG C with the speed of 4 ~ 5 DEG C/min, is protected 40 ~ 50min of temperature, then 520 ~ 550 DEG C are cooled to the speed of 2 ~ 3 DEG C/min, it is passed through ammonia, keeps 180 ~ 210min of temperature, first It is passed through the ammonia of larger flow, makes quickly to penetrate into spring surface full of ammonia as early as possible in furnace, with the extension of time, ammonia Flow is gradually gradually reduced, and ammonia is made to slowly penetrate spring inner, avoid spring because ammonia it is unexpected infiltration caused by internal appearance Crackle improves the intensity and anti-fatigue performance of spring, and corrosion phenomenon occurs in backward spring, extends the service life of spring, natural It is down to room temperature, obtains nitriding spring；

(6) secondary quenching: being heated to 420 ~ 460 DEG C for nitriding spring with the speed of 4 ~ 5 DEG C/min, keep the temperature 60 ~ 80min, followed by It is continuous to be heated to 970 ~ 1020 DEG C, 30 ~ 40min is kept the temperature, is taken out, is placed in the quenching liquid, is down to room temperature naturally, further decrease The lattice partial size of spring improves the intensity and anti-fatigue performance of spring, obtains secondary quenching spring；

(7) it is tempered: secondary quenching spring being heated to 560 ~ 600 DEG C with the speed of 2 ~ 3 DEG C/min, keeps the temperature 30 ~ 40min, it is natural 230 ~ 270 DEG C are cooled to, 20 ~ 30min is kept the temperature, is down to room temperature naturally, eliminating spring inner may deposit because lattice partial size reduces Fine cracks, improve the intensity and corrosion resistance of spring, extend the service life of spring, obtain tempering spring；

(8) it post-processes: tempering spring being heated to 110 ~ 130 DEG C, oil surface is down to room temperature naturally, obtains anticorrosion endurance Damping spring.

The sodium bicarbonate solution of the step (1), quality variation concentration are 4 ~ 5%, and temperature is 50 ~ 55 DEG C.

The ultrasonic polishing of the step (2), frequency are 23 ~ 25kHz, and polishing fluid is cerium oxide polishing slurry.

The carbon dioxide of the step (3), when 1 ~ 40min, flow is 5.2 ~ 5.6m³When/h, 41 ~ 90min, flow is 4.1~4.4m³/ h, in the remaining time, flow is 3.3 ~ 3.5m³/h。

The quenching liquid of the step (4), nano oxidized zinc solution, the preparation method comprises the following steps: being the nano oxidized of 1 ~ 3nm by partial size Zinc is placed in water, and is stirred 20 ~ 30min in 60 ~ 70r/min, is obtained quenching liquid.

The ammonia of the step (5), when 1 ~ 80min, flow is 14 ~ 15m³When/h, 81 ~ 150min, flow is 10 ~ 11m³/ H, in the remaining time, flow is 6 ~ 7m³/h。

The oil surface of the step (8), with a thickness of 8 ~ 10 μm.

The anticorrosion endurance damping spring that the preparation method of the anticorrosion endurance damping spring is prepared.

The invention has the advantages that the preparation method of anticorrosion endurance damping spring provided by the invention, is prepared Spring, intensity is high, and anti-corrosion capability is strong, and corrosion phenomenon is less prone in exposure air, and deformability and anti-fatigue performance are strong, make With still having preferable damping effect after a period of time, driving comfort can be improved；Carbonic acid first is used to molding spring Hydrogen sodium solution is cleaned by ultrasonic, and the spot on formed spring surface can be removed, and improves the treatment effect in later period；To bullet after cleaning Spring carries out ultrasonic polishing, keeps spring surface smooth, the frictional force of spring itself and spring and damping when can reduce spring-compressed Frictional force between device plays preferable protecting effect to spring and damper；Interim heating is carried out to spring after polishing, first It is quickly heated and is kept the temperature, be further continued for being slowly heated and kept the temperature, keep spring internal and external temperature consistent, then be passed through carbon dioxide Gas carries out Carburization Treatment, is first passed through the carbon dioxide of larger flow, makes quickly to penetrate into bullet full of carbon dioxide as early as possible in furnace Spring surface makes carbon dioxide slowly penetrate spring inner with the extension of time, the flow of carbon dioxide is gradually gradually reduced, It avoids inside cracked, improves the intensity and anti-fatigue performance of spring, keep preferable retractility；One is directly carried out after carburizing Secondary quenching makes spring from austenite to martensite transfor mation, reduces lattice partial size, improve the intensity of spring, avoids spring from occurring non- Elastic deformation；Spring is quickly heated after primary quenching, then carries out slow cooling again, ammonia is passed through and carries out nitriding, first It is passed through the ammonia of larger flow, makes quickly to penetrate into spring surface full of ammonia as early as possible in furnace, with the extension of time, ammonia Flow is gradually gradually reduced, and ammonia is made to slowly penetrate spring inner, avoid spring because ammonia it is unexpected infiltration caused by internal appearance Crackle improves the intensity and anti-fatigue performance of spring, and corrosion phenomenon occurs in backward spring, extends the service life of spring；Nitriding It carries out secondary quenching again afterwards, further decreases the lattice partial size of spring, improve the intensity and anti-fatigue performance of spring；Secondary quenching After be tempered, eliminate spring inner fine cracks that may be present due to lattice partial size reduces, improve the intensity of spring and resistance to Corrosive nature extends the service life of spring.

Specific embodiment

Illustrate the present invention with specific embodiment below.