Spring steel refers to the steel specially used in the manufacture of springs and elastic elements because of its elasticity under quenching and tempering conditions. The elasticity of a steel depends on its ability to deform, that is, within a specified range, to bear a certain load without permanent deformation after the load is removed.
Spring steel should have excellent metallurgical quality (high purity and uniformity), good surface quality (strict control of surface defects and decarbonization), precise shape and size.
General spring steel can be produced by electric furnace, open hearth furnace or oxygen converter; High quality spring steel with good quality or special properties is refined by electroslag furnace or vacuum furnace. The content range of carbon, manganese, silicon and other main elements in spring steel is narrow, so the chemical composition must be strictly controlled during smelting. When the silicon content is high, it is easy to form bubbles and other defects, and when the steel ingot is not cooled after forging and rolling, it is easy to produce white spots. Therefore, smelting raw materials must be dry, as far as possible to remove gas and inclusion, and to avoid molten steel overheating.
Before we design the tricycle and ran after a period of time, after the spring fatigue compressing, cause the entire engine set, it is easy to cause fracture of cylinder head bolt, now we have this strengthened the later, to the reduction of cylinder head bolt fracture have very good effect of T, another is our start bar, usually puts it, we use and general factory, We use 45 for modulation processing, which can ensure that it will not cause clearance and shaking of the output shaft and starting rod of the engine under the frequent start of many times.
