How to prolong the service life of imported bearings
How to prolong the service life of imported bearings
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The difference between cold and hot rolled
by：Waxing
2020-11-12
The improvement in the condition of cold forming spring (
Cold roll)
In the condition of cold forming of the spring ordinary under 10 mm in diameter or thickness.
Cold forming spring knife heat treatment process: about with cold-rolled steel plate, steel belt or made of cold drawn steel wire spring, due to the cold plastic deformation data reinforcement, spring has arrived in the performance of the request.
So the spring just within the scope of around 250 ℃ after forming, heat preservation of around 30 min to stress treatment, in order to eliminate internal stress produced by cold forming springs, and helping to shape spring.
Under the thermal state forming the spring ([2]
Hot roll)
In the condition of hot forming of the spring general in more than 10 mm in diameter or thickness.
Thermoforming spring heat treatment process, in this way to shape spring mostly hot forming and heat treatment of separation together to stop, and helical spring is mostly in the hot forming in stop after heat treatment.
This kind of spring steel heat treatment is quenching + tempering, warm organization for tempering sorbite after heat treatment.
The organization of the elastic limit and yield limit is high, and there is a certain toughness.
In order to ensure that the plasticity and toughness of the coil spring on the back of the performance, we should choose hot roll here.
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