Title: Heat treatment equipment for reforming spring steel wire
Application Number: 85100190 Application Date: 1985.04.01
Publication Number: 1002151 Publication Date: 1986.08.06
Approval Pub. Date: Granted Pub. Date: 1988.05.25
International Classifi-cation: B21D9/00,C21D1/78,C21D9/52,C21D9/567,C21D9/62
Applicant(s) Name: Xi-an Metallurgical Construction College Address:
Inventor(s) Name: Han Xiangzhong, Lu Panyin, Wang Jinrui, Xiong Meng
Attorney & Agent: SUN FENG
Abstract:
     This invention concerns a compound strenthening process for steel material. It consists of heating the spring steel wire of carbonsteel or low alloy steel on a continuously operating production line to AC3 (100-250)deg.C, cooling it immediately in a Pb-Bi alloy bath, then causing the wire to be drawn to the desired size through a die of suitable cross-section, quenching it in oil bath, and then reheating the wire in a fluidized particle oven. The equipment for heating and forming steel spring wire in this invention consists of a combined device acting as the electric pole and lubricator, a forming-quenching device and a fluidized particle reheating oven, etc.. This process overcomes the shortcomings of prior processes, such as broken wire happened frequently, low surface quality of the prod, non-uniformity of properties, etc..
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