公开(公告)号：EP2690189A1

公开(公告)日：2014-01-29

申请号：EP12762787.5

申请日：2012-03-23

申请人： Nisshin Steel Co., Ltd.

发明人： KODAMA, Shinichi ,  KUBO, Hironori ,  TAGASHIRA, Satoshi ,  FUJIHARA, Masaru

IPC分类号： C22C38/00 ,  B26F1/40 ,  B26F1/44 ,  C21D9/00 ,  C21D9/46 ,  C22C38/58

CPC分类号： B26F1/44 ,  B23P15/40 ,  B26F2001/4436 ,  C21D3/04 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/26 ,  Y10T83/929

摘要： [Problem] To provide a band-shaped die-cutting blade having good bendability and having further improved durability.
[Solution] A steel plate for band-shaped die-cutting blades having excellent durability, wherein the base part to a depth of more than 200 µm from the surface of the steel plate has a chemical composition containing 0.40 to 0.80 mass% C and 0.10 to 0.50 mass% Nb and has a metallographic structure which comprises bainite or tempered martensite and in which a spherical carbide constituted of cementite is present in the bainite or tempered martensite in an amount of 1.0 vol% or more and a Nb-containing carbide having an equivalent-circle diameter of 0. 5 µm or more is present at an existential density of 10.0 or more grains per 900 µm 2 , and the base part has a controlled hardness of from 300 to 450 HV, and wherein the surface layer part has a decarburized surface layer constituted of a ferrite single-phase structure and having a thickness of 5 µm or more, and in the 15-µm-thick surface layer region, the existential density of the Nb-containing carbide having an equivalent-circle diameter of 0. 5 µm or more is from 0 to 5.0 grains per 900 µm 2 .
Fig. 1 :
(1) Decarburized Surface Layer
(2) Body Part
(3) Sharpened Part
(4) Quenched Blade Edge Part

Fig. 2 :
(1) Decarburized Surface Layer
(2) Body Part
(3) Sharpened Part
(4) Quenched Blade Edge Part
(5) Abrasion

Fig. 3 :
(1) Decarburized Surface Layer
(2) 15-µm-thick Surface Layer Region
(3) Surface Layer Part
(4) Base Part
(5) Plate Thickness

摘要翻译： [问题]提供一种具有良好的弯曲性，并且具有进一步改善的耐久性的带状模片切割刀片。 [解决方法]一种钢板具有优异的耐久性的带状模片切割刀片，所述基座部分从所述钢板的表面worin到大于200微米的深度的化学组成包含0:40到0.80质量％的C和12:10 至12:50质量％的Nb，并且具有金相结构，其包括贝氏体或回火马氏体，并且其中一个球形碳化物构成的渗碳体存在于贝氏体或以1.0体积％以上的量在回火马氏体，并且具有到一个含Nb碳化物 的0.5微米或以上当量圆直径为存在于以每900微米2 10.0个以上的晶粒的存在密度，并且基座部件具有从300到450 HV的受控硬度和worin表面层部分具有 脱碳表面层构成的铁素体单相结构，并具有厚度为5微米或更大，并且在15微米厚的表面层区域，具有当量圆二的含Nb碳化物的存在密度 的0.5微米或更大ameter为每900微米第二0-5.0晶粒 图1：（1）脱碳表层（2）身体部分（3）锐化部分（4）淬火刀尖部图2：（1）脱碳表层（2）身体部分（3）削尖的部分（4） 淬火刀刃的部分（5）耐磨耗图3：（1）表面脱碳层（2）15微米厚的表面层区域（3）表面层的部分（4）基体部分（5）板厚

公开(公告)号：EP2407569A1

公开(公告)日：2012-01-18

申请号：EP10750839.2

申请日：2010-03-09

申请人： NISSHIN STEEL CO., LTD.

发明人： FUJIMOTO, Nobukazu ,  KODAMA, Shinichi ,  FUJIWARA, Susumu

IPC分类号： C22C38/00 ,  C22C18/04 ,  C22C38/14 ,  C22C38/58

CPC分类号： C22C18/04 ,  B32B15/013 ,  C21D9/46 ,  C21D2211/005 ,  C22C18/00 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  C23C2/02 ,  C23C2/06 ,  Y10T428/12799

摘要： [Problem] To provide a zinc-based alloy-plated steel material in which low-carbon steel is used as the base material and which is excellent in resistance to molten-metal embrittlement cracking and has good workability.
[Means for Resolution]
A zinc-based alloy-plated steel material excellent in resistance to molten-metal embrittlement cracking, which has a zinc-based alloy-plating layer on the surface of a steel base material that has a chemical composition comprising, as % by mass, C: 0.010 to 0.100%, Si: at most 1.50%, Mn: at most 2.00%, P: at most 0.100%, S: at most 0.030%, N: at most 0.0050%, Ti: at most 0.050%, and B: 0.0003 to 0.0100%, with a balance of Fe and inevitable impurities, and having the value L to be defined by the following formula, L = {(Ti/48) + (B/11) }/(N/14), of at least 5.50, and has a metallographic structure comprising ferrite: 10 to 99% by volume with a balance of bainite, pearlite, cementite or martensite.