Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
Magnesium alloy is the lightest of all practical metals and has the highest specific strength. However, there is a need for improved formability at ambient temperature. It is known that deep drawing of lightweight magnesium alloy sheets has poor workability due to the anisotropy of the crystal structure. Since non-bottom slipping is particularly difficult to occur at room temperature, molding is generally performed in warm conditions. In the present study, we focused on frictional heat generation in friction stir welding and attempted warm deep drawing of magnesium alloy using a punch incorporating a frictional heat generation jig. The test material is a steel material such as tool steel or stainless steel. The punch generated heat due to the friction between the heater jig and the rotary jig. As a result, it was found that a heat generation of over 400 °C could be obtained within a few minutes of friction machining time. It was found that deep drawing of magnesium alloys is possible using punches in a warm state of 200 to 300 °C.
