Under many circumstances, pressure springs are used in the use of load-bearing springs. So in more times, we need to select the material to pay attention to the design of pressure resistance and elastic strength. Therefore, in the selection of pressure spring processing materials, we need to take into account the customer's specific use and pressure demand.
The pressure spring spring is the use of information is of course the higher elasticity, elastic material is better, however, in practical application, the data requirements of physical and chemical properties and mechanical conditions of choice
1, the elastic limit and deformation of the elastic limit is: data plus a rotary force, eliminate the stress force, no residual deformation are relative to the maximum force, it is difficult to determine, but relatively high tensile strength, the elastic limit of the high, together by heat treatment or cold processing to change elastic limit;
2, the elastic coefficient of the pressure spring: material force, stress and strain of the units called elastic coefficient, this value is the spring planning matrix, the elastic coefficient of spring material depends on its chemical composition, due to heat treatment, cold processing and slightly change, using high temperature will reduce;
3, fatigue intensity: fatigue strength is related to tensile strength of data, but it is changed due to surface condition, decarburization, cold processing and heat treatment. These conditions are changed due to data processing method and pressure spring manufacturing method.
4: the big spring, quenching in order to improve the effect of quenching, quenching demand outstanding, hardenability depends on the chemical composition of materials;
5, shape scale: the mechanical properties of the pressure spring material vary with the scale, and can not get the special scale, the shape is restrained.
6, heat resistance: the use of some spring in a certain high temperature, various mechanical properties usually spring data as the temperature rises and cuts, at a certain temperature when the spring characteristics of cut, heat resistance due to chemical composition data, the method of making;
7, corrosion resistance: sometimes the pressure spring will be applied in corrosive environment, and it will corrode fatigue. Corrosion resistance is mainly determined by its chemical composition, but it will also be different from heat treatment and cold processing.
8, electrical conductance: electrical appliances, communications and electrical conduction is often available at the moment, brass, copper, beryllium copper copper alloy spring materials
9, the thermal expansion of spring: the clock and so on will avoid temperature changes caused by the elastic moment to use special materials;
10, there are other requirements: grain size, segregation, non-magnetic, non metallic inclusion, scars, deformation, heat treatment processing, Naisai problems etc..