CORROSION-RESISTANT R-Fe-B BONDED MAGNET AND POWDER FOR FORMING R-Fe-B BONDED MAGNET AND METHOD FOR PREPARATION THEREOF
    172.
    发明申请
    CORROSION-RESISTANT R-Fe-B BONDED MAGNET AND POWDER FOR FORMING R-Fe-B BONDED MAGNET AND METHOD FOR PREPARATION THEREOF 审中-公开
    用于形成R-Fe-B粘结磁体的耐腐蚀R-Fe-B结合磁铁和粉末及其制备方法

    公开(公告)号:WO01020620A1

    公开(公告)日:2001-03-22

    申请号:PCT/JP2000/003816

    申请日:2000-06-12

    Abstract: A powder for forming a R-Fe-B bonded magnet, wherein an R compound, such as an R oxide, an R carbide, an R nitride or an R hydride, which is contained in a raw material powder such as a super rapidly cooled powder or a hydrogen treated powder (HDDR powder) and reacts with water vapor to change into R(OH)3, has been converted to a R hydroxide R(OH)3 being stable in the air by subjecting the raw material powder to a heat treatment in an atmosphere of a pressured water vapor. The powder for forming an R-Fe-B bonded magnet is free from the generation of a white powder in the surface of or inside a bonded magnet formed from the powder, and accordingly, is free from the occurrence of cracking, chipping, swelling or the like in the bonded magnet caused by volume expansion of a white powder. Thus, the above powder can be used for preparing an R-Fe-B bonded magnet which is free from the white powder which has been observed in a conventional R-Fe-B bonded magnet in the use for a long period of time and is reduced in the occurrence of defects such as cracking, chipping, swelling and the like.

    Abstract translation: 用于形成R-Fe-B粘结磁体的粉末,其中包含在诸如超快速冷却的原料粉末中的R化合物,例如R氧化物,R碳化物,R氮化物或R氢化物 粉末或氢处理粉末(HDDR粉末)并与水蒸汽反应以转化为R(OH)3,已经转化为在空气中稳定的氢氧化R(OH)3,使原料粉末受热 在压力水汽的气氛中进行处理。 用于形成R-Fe-B粘结磁体的粉末在由粉末形成的粘结磁体的表面或内部没有产生白色粉末,因此没有发生开裂,碎裂,膨胀或 由于白色粉末的体积膨胀引起的粘结磁体中的类似物。 因此,上述粉末可用于制备在常规R-Fe-B粘结磁体中长时间观察到的不含白色粉末的R-Fe-B粘结磁体,并且是 减少了诸如破裂,碎裂,膨胀等缺陷的发生。

    PROCESS OF PREPARING AN IRON-BASED POWDER IN A GAS-TIGHT FURNACE
    173.
    发明申请
    PROCESS OF PREPARING AN IRON-BASED POWDER IN A GAS-TIGHT FURNACE 审中-公开
    在气体炉中制备基于铁的粉末的方法

    公开(公告)号:WO99037425A1

    公开(公告)日:1999-07-29

    申请号:PCT/SE1999/000093

    申请日:1999-01-21

    Abstract: The invention concerns a low pressure process for the preparation of an iron-based, optionally alloyed powder comprising the steps of preparing a raw powder essentially consisting of iron and optionally at least one alloying element selected from the group consisting of chromium, manganese, copper, nickel, vanadium, niobium, boron, silicon, molybdenum and tungsten; charging a gas tight furnace with the powder in an essentially inert gas atmosphere and closing the furnace; increasing the furnace temperature; monitoring the increase of the formation of CO gas and evacuating gas from the furnace when a significant increase of the CO formation is observed and cooling the powder when the increase of the formation of CO gas diminishes.

    Abstract translation: 本发明涉及一种用于制备铁基,任选合金粉末的低压方法,包括以下步骤:制备基本上由铁和任选的至少一种选自铬,锰,铜, 镍,钒,铌,硼,硅,钼和钨; 在基本上惰性气体气氛中将粉末装入气密炉中并关闭炉子; 提高炉温; 当CO气体形成的显着增加被观察到时,监测CO气体形成的增加和从炉中排出气体的增加,并且当CO气体的形成增加时,粉末冷却。

    PROCESS FOR PREPARATION OF SOFT MAGNETIC COMPOSITES AND THE COMPOSITES PREPARED
    174.
    发明申请
    PROCESS FOR PREPARATION OF SOFT MAGNETIC COMPOSITES AND THE COMPOSITES PREPARED 审中-公开
    制备软磁性复合材料的方法和制备的复合材料

    公开(公告)号:WO99003622A1

    公开(公告)日:1999-01-28

    申请号:PCT/SE1998/001389

    申请日:1998-07-16

    Abstract: The invention concerns a process for the preparation of soft magnetic composite products comprising the steps of providing particles of an iron based soft magnetic material with an electrically insultating layer; optionally mixing the dry powder with a lubricant; compacting the powder and heating the obtained component at an elevated temperature in the presence of water vapour. The invention also comprises the iron powder compact subjected to this treatment.

    Abstract translation: 本发明涉及一种制备软磁性复合材料产品的方法,包括以下步骤:提供具有电绝缘层的铁基软磁材料颗粒; 任选地将干粉与润滑剂混合; 在水蒸汽存在下,在升高的温度下压制粉末并加热得到的组分。 本发明还包括经受该处理的铁粉末压块。

    스테인레스강 분말
    177.
    发明授权
    스테인레스강 분말 失效
    不锈钢粉

    公开(公告)号:KR100530524B1

    公开(公告)日:2005-11-24

    申请号:KR1019997011787

    申请日:1998-06-17

    Abstract: 본 발명은 저산소의, 실질적으로 탄소가 없는 스테인레스강 분말을 제조하는 방법에 관한 것이고, 철 외에 탄소와 10%이상의 크롬을 함유하는 용융 강을 준비하는 단계와, 물 분무후의 예상 산소 함량에 의해 결정되는 값으로 용융 강의 탄소 함량을 조정하는 단계와, 용용물을 물 분무하는 단계와, 분무된 분말을 1120 ℃에서 물의 제어된 량을 포함하는 환원 분위기에서 어닐링하는 단계를 포함한다. 본 발명은 또한 중량비로 10%의 크롬 함량, 0.2 내지 0.7 사이, 적합하게 0.4 내지 0.6% 사이의 탄소 함량과 0.5% 이하의 불순물을 포함하며 산소/탄소비가 약 1 내지 3인 물 분무 강 분말 뿐만 아니라 본 방법에 따라서 얻은 어닐링 분말에 관한 것이다.

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