■■■■■■■■■■■■■■■■■■■
川崎製鉄技報
KAWASAKI STEEL GIHO
Vol.13 (1981) No.3
■■■■■■■■■■■■■■■■■■■

高Mn非磁性鋼の開発
Developmet of High Manganese Non-magnetic Steels

佐々木 晃史(Terufumi Sasaki) 渡辺 健次(Kenji Watanabe) 野原 清彦(Kiyohiko Nohara) 小野  寛(Yutaka Ono) 近藤 信行(Nobuyuki Kondo) 佐々木 徹(Toru Sasaki) 佐藤 周三(Shuzo Sato) 一瀬  功(Isao Ichise)
要旨 :
広範な需要・用途に適用しうる新しい高Mn非磁性鋼を開発することを目的として,基本成分としてのCおよびMnが透磁率,熱膨張係数ならびに機械的性質に及ぼす影響を調べた。また本鋼の現場製造技術を確立し,工程材の諸特性を把握するため,真空誘導炉溶製した5t鋼塊からH形鋼,丸棒,異形棒鋼を現場工程で製造した。その結果,いずれの製品においても優れた特性が得られることが確かめられた。さらに実製品への応用例として連続鋳造機電磁攪拌装置付属のピンチロール用非磁性材をとりあげ,前述の現場工程材とあわせて低温(−196℃)から高温にわたる機械的・物理的性質ならびに溶接継手性能などについて論述した。
Synopsis :
In order to develop new high manganese non-magnetic steels that can be employed to extensive applications ranging from cryogenic to elevated temperatures, effects of C and Mn on magnetic permeability, thermal expansion coefficient and mechanical properties are investigated. It is found that the relation between thermal expansion coefficient, β, 10((-6)℃(-1)) and both C and Mn is expressed by the following linear regression equation: β, (10(-6)℃)=17.66 + 3.82C(%) - 0.22Mn(%) Good mechanical properties are exhibited in the wide range of Mn contents between 18 and 30% at room temperature, while there is a tendency that this optimum range of Mn content is reduced at cryogenic temperatures. Then, H-shapes, round bars and deformed bars are manufactured at the workshops using 5t vacuum melted ingots, aiming to establish production process and to study physical and mechanical properties, machinability and weldability of the products. As a result, it is shown that any of these products have excellent properties as non-magnetic steels. In addition, the manufacture of non-magnetic pinch rolls attached to the electro-magnetic stirring equipment on a continuous casting machine is described in detail as one of prectical applications of high manganese non-magnetic steels.
本文( PDF: 17P/594kb )




(c)JFE Steel Corporation, 2003