마그네슘 합금제 휠 제조에 관한 연구

A Study of Manufacturing AZ91D Mg Alley Wheel

  • Kim, Jung-Gu (Dept.of Metallurgical Material Science Engineering, Sungkyunkwan University) ;
  • Shin, Il-Seong (Kyungwon Light Metal Co.,Ltd.) ;
  • Kum, Dong-Hwa (Korea Institute of Science and Technology)
  • 발행 : 1999.07.01

초록

마그네슘은 20여년간 자동차 산업에서 휠소재로 사용되어 왔다. 마그네슘 휠은 무게가 알루미늄 휠보다 25% 가벼워서 주행성이 우수하다. 이 연구의 목적은 사형주조 및 영구금형주조 공정에 의한 AZ91D 합금제 췰을 개발하는 것이다 보호개스$(SF_6+CO_2)$를 사용하는 비플럭스 용해기술을 적용하여 용탕의 산화와 불순물의 유입을 배제하였다 마그네슘 용탕은 가압식 펌프시스템을 사용하여 가열된 파이프를 통하여 모울드에 자동으로 공급된다. 열처리 및 인고트의 조성에 따른 AZ91B 합금제 휠의 기계적 특성을 조사하였다.

Magnesium has been used as wheel materials in the automotive industry for more than 20 years. The magnesium wheels, which are lighter by 25% than aluminum wheels, provide easy controllability providing excellent road holding by the reduction of weight. The purpose of this work is to develop cast AZ91D alloy wheel by sand cast and permanent mold cast. The fluxless melting with the protective gas $(SF_6+CO_2)$ was Performed to eliminate oxidation of melt and impurity. The transfer of molten magnesium to the mold was done by using gas-pressurized Pump system through the heated pipe. The mechanical properites of AZ91D alloy wheel were investigated as a function of heat treatment, ingot composition.

키워드

참고문헌

  1. Kobe Steel Engineering Report v.34 New Magnesium Alloy Wheel T. Suzuki;K. Ozaki
  2. Rolled Magnesium Products : What Goes Around, What Comes Around, 49th IMA Prceedings v.39 L. T. Barnes
  3. Wheels for Vehicles, Light Metal v.41 no.136 H. Shima
  4. Magnesium Properties and Applications for Automobiles SP-962 v.SP-962 Magnesium Sand-Cast Wheels Development Program N. Fantetti;J. Ranaud;T. Huschilt
  5. SAE Technical Paper No. 930551 v.SAE 56 The Potential for Vehicle Weight Reduction Using Magnesium J. Davis
  6. IMA Proceedings v.IMA 87 Improved Protection of Molten Magnesium with Air/CO₂/$SF_6$Gas Mixtures S. L. Couling
  7. ASTM Standard Specification B661 : Practice for Heat Treatment of Magnesium Alloys
  8. ASM v.253 Heat Treatment, Sturcture and Properties of Nonferrous Alloys C. R. Brooks