HIGH STRENGTH AND HIGH TOUGHNESS SPRING AND MEHTOD FOR MANUFACTURING HIGH STRENGTH AND HIGH TOUGHNESS SPRING

摘要

It is arranged to simplify for there is advanced cold working characteristic using one wire material of manufacturing process of the spring of manufacture spring by a direct drawing process with a high-intensitive spring and higher toughness and manufacturing method. A kind of method for manufacturing a spring includes the following steps: that direct puller has one steel wire of an advanced cold working characteristic, softening heat treatment is not carried out relative to steel wire, it is heat-treated steel wire, steel wire has an austenite structure in this way, the cooling steel wire using oil, make steel wire, and cold-processing steel wire in the form of spring is thin out. Heat treatment temperature is in 900 to 1000 degrees Celsius of tempering ranges within 350 to 450 degree Celsius ranges