スキャンレーザによる鉄鋼材料へのFe-Al系合金被膜の生成  [in Japanese] Production of Fe-Al alloy coat on steel block by scanning laser beam  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

近年,金型などの大きな負荷のかかる工業製品に対する長寿命化の要求が高まっている.低い製作コストで長寿命化を図るためには必要部分にのみ高強度な合金被膜を形成する方法が有効と考えられ,本研究ではレーザ熱処理を用いて炭素鋼表面に局所的なFe-Al系合金被膜を作成する手法を提案する.ショットライニングにより炭層鋼に貼り付けたアルミ箔にデフォーカスしたCO<sub>2</sub>レーザ照射することで境界面での鉄とアルミの相互拡散を促進しFe-Al系合金を成長させる.生成されるFe-Al系合金の組成は熱処理温度に依存するため,いろいろな熱処理条件でレーザを照射した試験片の断面を観察した結果,高速度レーザ走査によって表面を加熱することで母材の性質を変えずに局所的にFe-Al系合金被膜を生成できることを示した.

Recently, there has been increasing demand for long life of industrial products. High-strength alloy coating on necessary parts can decrease manufacturing costs for prolongation of life. This study proposes a laser surface alloying method to form an Fe-Al alloy coat on carbon steel. A defocused CO<sub>2</sub> laser was used to irradiate Al foil on a steel block by shot lining. Mutual diffusion proceeds with laser heating of Al foil, and the Fe-Al alloy grows. For example, Fe<sub>3</sub>Al grows at ≥950°C. Two laser irradiation methods were used. In low-speed laser scanning, the laser beam scanned along a straight line at 5.0 mm/s. In high-speed laser scanning, the laser beam was reciprocated along a straight line at 100 Hz, and was considered as a linear heat source. The metal structures of the laser-irradiated area were observed. The results indicated that a local Fe-Al alloy coat was formed by high-speed laser scanning without changing the properties of the base material.

Journal

  • Journal of the Japan Society for Abrasive Technology

    Journal of the Japan Society for Abrasive Technology 59(9), 516-520, 2015

    The Japan Society for Abrasive Technology

Codes

  • NII Article ID (NAID)
    130005119488
  • NII NACSIS-CAT ID (NCID)
    AN10192823
  • Text Lang
    JPN
  • ISSN
    0914-2703
  • NDL Article ID
    026721497
  • NDL Call No.
    Z16-1147
  • Data Source
    NDL  J-STAGE 
Page Top