SM45C의 중실축과 중공축의 마찰용접 특성에 관한 연구 (A Study on the Mechanical Properties of the Friction Welding with Hollow and Solid Shaft of SM45C)

서지정보

· 발행기관 : 한국생산제조학회
· 수록지 정보 : 한국생산제조학회지 / 19권 / 6호 / 841 ~ 846페이지
· 저자명 : 구건섭, 최원용

초록

The present study examined the mechanical properties of the friction welding with hollow and solid shaft of SM45,of which the diameter is 25.2mm and 33mm. Friction welding was conducted at welding conditions of 2,000rpm,friction pressure of 50㎫, upset pressure of 70㎫, friction time of 0.4sec to 1.4sec by increasing 0.2sec, upset time of 2.0 sec including variable such as friction time are following. Under these conditions, a tensile test, a hardness test and a microstructure of weld interface were studied. The results were as follows : When the friction time was 1.0 seconds under the conditions, the maximum tensile strength of the friction weld happened to be 1,094MPa, which is 120% compared with the tensile strength of SM45C base metal. The upset length linearly increased as friction time increased. According to the hardness test, the hardness distribution of the weld interface was formed from 475Hv to 739Hv. HAZ(Heat Affected Zone) was formed from the weld interface to 2mm of SM45C.

영어초록

The present study examined the mechanical properties of the friction welding with hollow and solid shaft of SM45,of which the diameter is 25.2mm and 33mm. Friction welding was conducted at welding conditions of 2,000rpm,friction pressure of 50㎫, upset pressure of 70㎫, friction time of 0.4sec to 1.4sec by increasing 0.2sec, upset time of 2.0 sec including variable such as friction time are following. Under these conditions, a tensile test, a hardness test and a microstructure of weld interface were studied. The results were as follows : When the friction time was 1.0 seconds under the conditions, the maximum tensile strength of the friction weld happened to be 1,094MPa, which is 120% compared with the tensile strength of SM45C base metal. The upset length linearly increased as friction time increased. According to the hardness test, the hardness distribution of the weld interface was formed from 475Hv to 739Hv. HAZ(Heat Affected Zone) was formed from the weld interface to 2mm of SM45C.

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