鋼板の製造方法
    1.
    发明申请

    公开(公告)号:WO2022191006A1

    公开(公告)日:2022-09-15

    申请号:PCT/JP2022/008962

    申请日:2022-03-02

    摘要: 本発明に係る鋼板の製造方法は、Si含有量が1.0質量%以上かつCr含有量が1質量%以下である鋼素材を、前記鋼素材のCr含有量が0.2質量%以上0.6質量%以下の場合、下記式1A、 前記鋼素材のCr含有量が0.2質量%未満の場合、下記式1B、 または、前記鋼素材のCr含有量が0.6質量%超1.0質量%以下の場合、下記式1C、 (式1A、式1Bおよび式1Cにおいて、Tは500℃以上である焼鈍時の均熱保持温度(℃)であり、tは焼鈍時の均熱保持時間(秒)であり、かつ、Cr[%]は前記鋼素材のCr含有量(質量%)である)を満たす条件下において焼鈍する工程を含む。

    一种热镀锌钢板的制造方法、钢板及车用构件

    公开(公告)号:WO2022017138A1

    公开(公告)日:2022-01-27

    申请号:PCT/CN2021/103136

    申请日:2021-06-29

    IPC分类号: C21D1/76 C21D1/00 C23C2/06

    摘要: 本发明提供一种热镀锌钢板的制造方法,包括对高Si、Mn含量的钢板进行热处理步骤、热浸镀步骤和合金化处理步骤,热处理步骤包括第一加热阶段和均热阶段,第一加热阶段的第一加热气氛含有0.01-0.5%体积分数的O 2,余量为N 2和不可避免的杂质,均热阶段的均热气氛含有0.5%以上体积分数的H 2,余量为N 2和不可避免的杂质,控制第一加热气氛和均热气氛的露点≥-20℃。本发明还提供一种热镀锌钢板和车用构件。本发明通过对热处理气氛进行控制,抑制了Si、Mn合金元素在钢板表面及氧化铁与基体钢板的界面、还原铁与基体钢板的界面富集,使得热镀锌钢板选用高Si、Mn含量的钢板作为母材时,经历合金化处理步骤后,可以兼得足够的镀层Fe含量和高断裂延伸率。

    DIRECT FLAME BURNER UNIT FOR FURNACES FOR THE THERMO-CHEMICAL TREATMENT OF STEEL STRIPS IN CONTINUOUS HOT-DIP GALVANIZING PLANTS

    公开(公告)号:WO2021250517A1

    公开(公告)日:2021-12-16

    申请号:PCT/IB2021/054896

    申请日:2021-06-04

    申请人: TENOVA S.P.A.

    摘要: Direct flame furnace burner unit (100) for furnaces (200) for the thermo-chemical treatment of steel strips in continuous hot-dip galvanizing plants, comprising a burner provided with: - a combustion head (11) provided with a combustion chamber (12) having an outlet opening (13) of the combustion flame; - a body (14) to which the combustion head (11) is fixed and which comprises: a first chamber (16) which is in communication with the combustion chamber (12) and which is provided with at least one inlet opening (17) connectable to a supply source (SA1) of a pre- heated comburent, a first lance (18) for the injection of a fuel into the combustion chamber (12) and which has an inlet end which is connectable to a first supply source of a fuel (SG1) and an outlet end in communication with the combustion chamber (12), a mixing chamber (19) provided with at least a first inlet opening (20) which is connectable to a supply source of a not pre-heated comburent (SA2), with at least a second inlet opening (21) which is connectable to a second supply source of a fuel (SG2) and with at least an outlet opening of the mixture formed therein; at least a second lance (23) for the injection of the mixture into the combustion chamber (12) and having an inlet end in communication with the outlet opening of the mixing chamber (19) and an outlet end in communication with the combustion chamber (12); wherein the burner is alternatively and selectively operable in two distinct operating modes: a diffusive flame combustion mode, with lambda ranging between 0.9 and 0.98, wherein the combustion chamber (12) is fed only through the first chamber (16) and the first lance (18) respectively with the preheated comburent and with the fuel, and a premixed flame combustion mode, with lambda ranging between 1 and 1.25, wherein the combustion chamber (12) is fed only by means of the second lance (23) with the mixture formed inside the mixing chamber (19).

    雰囲気撹拌ファン及び熱処理炉
    8.
    发明申请

    公开(公告)号:WO2020255509A1

    公开(公告)日:2020-12-24

    申请号:PCT/JP2020/012656

    申请日:2020-03-23

    申请人: NTN株式会社

    发明人: 大木 力

    摘要: 雰囲気撹拌ファンは、外周面(11)を有するボス(1)と、外周面(11)から径方向に沿って延在する複数のブレード(2)とを備える。ブレード(2)の数は、4以上である。ブレード(2)の平均ピッチ角は、45°以下である。ブレード(2)の平均翼弦長は、雰囲気撹拌ファンの直径(D)の0.3倍以上である。

    연속 열처리로용 복사가열장치 및 지지구조

    公开(公告)号:WO2019221459A1

    公开(公告)日:2019-11-21

    申请号:PCT/KR2019/005684

    申请日:2019-05-12

    发明人: 김형수

    摘要: 본 발명은 연속소둔로 내에서 이동하는 강판을 무산화 분위기에서 간접적으로 가열하는 복사가열장치 및 그 지지구조에 관한 것으로, 특히 복사가열장치의 자중에 의한 굽힘 변형에 저항하는 강성을 증가시켜 복사가열장치의 변형을 감소시키고, 지지부의 응력집중을 완화하여 지지부의 파손을 방지할 수 있는 복사가열장치 및 그의 지지구조에 관한 것이다.