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弹簧恢复弹力的方法
文章来源:http://www.sdzbthc.com/ 发布时间:2022-01-07 浏览次数:
一般来说弹簧失去弹性是正常现象,是金属疲劳的结果。如果弹性已经很小了,可以进行弹簧淬火。
Generally speaking, the loss of spring elasticity is a normal phenomenon and the result of metal fatigue. If the elasticity is already very small, spring quenching can be carried out.
弹簧淬火具体过程如下:
The specific process of spring quenching is as follows:
1、淬火在盐浴炉淬火加热时,应将弹簧用铁丝均匀地捆扎好,或将弹簧套在芯棒上加热。加热时要保证弹簧表面五氧化与脱碳。盐浴应经过仔细脱氧。也可在可控气氛的箱式炉中加热,加热温度为850℃±10℃,保温10~15min,出炉淬油冷透。
1. When quenching and heating in salt bath furnace, the spring shall be evenly bound with iron wire, or the spring shall be sleeved on the mandrel for heating. When heating, ensure that the spring surface is oxidized and decarburized. The salt bath shall be carefully deoxidized. It can also be heated in a box furnace with controllable atmosphere. The heating temperature is 850 ℃± 10 ℃, and the heat preservation is 10 ~ 15min. The quenching oil out of the furnace is cooled thoroughly.
 压缩弹簧
2、抛丸处理为提高弹簧的疲劳强度需进行抛丸处理。弹丸直径0.3~0.5mm。采用压缩空气喷射时,压缩空气压力为0.4~0.5MPa;用离心机抛丸,弹丸的线速度为70m/s。经抛丸处理的压缩弹簧使用寿命能提高一倍以上。
2. Shot blasting shot blasting is required to improve the fatigue strength of the spring. The diameter of the projectile is 0.3 ~ 0.5mm. When compressed air injection is adopted, the pressure of compressed air is 0.4 ~ 0.5MPa; Shot blasting with centrifuge, the linear velocity of the shot is 70m / s. The service life of the compression spring treated by shot blasting can be more than doubled.
3、再结晶退火压缩弹簧卷制成型后,必须进行再结晶退火处理,使弹簧几何尺寸稳定,减少淬火时的变形。再结晶退火温度为550~650℃,保温1~1.5h后空冷。少量可在盐浴炉中进行,大批量采用连续式电阻炉通控制气氛。
3. After recrystallization annealing compression spring is rolled and formed, recrystallization annealing must be carried out to stabilize the geometric dimension of the spring and reduce the deformation during quenching. The recrystallization annealing temperature is 550 ~ 650 ℃ and air cooling after holding for 1 ~ 1.5h. A small amount can be carried out in the salt bath furnace, and the continuous resistance furnace is used to control the atmosphere in large quantities.
4、回火淬火后回火可进行两次。先进行矫正回火,矫正回火温度一般应低于终回火温度20℃左右,保温10~15min,出炉空冷。然后进行终回火,在弹簧尺寸矫正后,将弹簧装在回火定型夹具上进行终回火。回火定型夹具应保证弹簧的螺距和自由长度符合要求。回火温度为420℃±10℃,保温30~35min,出炉水冷。
4. Tempering can be carried out twice after tempering and quenching. First carry out corrective tempering. Generally, the corrective tempering temperature shall be about 20 ℃ lower than the final tempering temperature, keep the temperature for 10 ~ 15min, and discharge the furnace for air cooling. Then carry out final tempering. After the spring size is corrected, install the spring on the tempering setting fixture for final tempering. The tempering setting fixture shall ensure that the pitch and free length of the spring meet the requirements. The tempering temperature is 420 ℃± 10 ℃, holding for 30 ~ 35min, discharging and water cooling.
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