- Jul 04, 2017 -
Tension spring characteristics
Material: stainless steel
Product features: There are stretch limit buckle
Product use: to prevent the pulse of the front of the electronic fence due to thermal expansion and contraction caused by alloy wire breakage and too loose
Number of Installations: Number of Terminal Rods * 2 * Number of Installations (eg 4-wire, 8-wire)
Product content: When the tension reaches 10kg when the spring is no longer stretched, the alloy line drawing.
In the tension spring processing production, always prone to a variety of small problems, how to deal with it?
1 if the air furnace heating and quenching without protective gas or salt bath deoxidation is not complete, it may produce decarburization, the solution: air furnace heating quenching should be protected gas or drops of organic solution protection: salt bath heating, salt bath should Deoxidation, impurity BAO mass fraction less than 0.2%; strengthen the quality of raw materials to check.
2, if the hardness after quenching, will make the tension spring life decreased, residual deformation. Solution: the use of good hardenability of steel, to improve the cooling capacity of quenching medium, Tension Spring tension spring into the quenching medium temperature should be above AR3, the appropriate increase in quenching heating temperature, strengthen the quenching after the microstructure test.
3, the temperature overheating will produce coarse grain, brittleness increased. Solution: according to the correct temperature of the process test heat quenching; appropriate to reduce the heat forming temperature or to strengthen the calibration of the instrument to ensure accurate temperature measurement.
4, the reason for cracking most of the reason is due to high thermal temperature or quenching medium cooling capacity is too large, Tension Spring surface decarburization and tempering is not timely. Solution: with isothermal quenching or martensitic grading quenching; quenching medium in the cold to 250 ~ 300oC out of air cooling; quenching immediately after tempering.