Abstract:
PROBLEM TO BE SOLVED: To provide a heat-resistant ferritic stainless cold rolled steel sheet excellent in workability, a ferritic stainless hot rolled steel sheet for cold rolled raw material, and a method for manufacturing them.SOLUTION: A heat-resistant ferritic stainless cold rolled steel sheet contains, by mass, C: 0.02% or less, Si: 0.1-1.0%, Mn: over 0.6 to 1.5%, P: 0.01-0.05%, S: 0.0001-0.0100%, Cr: 13.0-20.0%, Mo: 0.1-3.0%, Ti: 0.005-0.20%, Nb: 0.3-1.0%, B: 0.0002-0.0050%, Al: 0.005-0.50% and N: 0.02% or less, and the balance comprising Fe and inevitable impurities. The ferritic stainless cold rolled steel sheet is characterized in that the areal proportion of grains having a {111} orientation in a region between a surface layer and t/4 (t is the sheet thickness) is 20% or higher, the areal proportion of grains having a {111} orientation in a region between t/4 and t/2 is 40% or higher, and the areal proportion of grains having a {011} orientation in the overall thickness region is 15% or lower.
Abstract:
Provided are: a high-strength thick steel plate for construction having excellent characteristics for preventing the diffusion of brittle cracks, said plate being used for ships and having a preferred plate thickness of at least 50 mm; and a method for producing the thick steel plate. The thick steel plate has excellent characteristics for preventing the diffusion of brittle cracks, characterized in that: the thick steel sheet has a specific component composition; the main constituent of the metal structure is a ferrite phase; the thick metal sheet has an aggregate structure in which the density (I) in the RD//(110) plane at the plate thickness surface is at least 1.3, and the density (I) in the RD//(110) plane at the plate thickness center is at least 1.8; the Charpy fracture appearance transition temperature (vTrs) at the surface is not more than -60°C, and the Charpy fracture appearance transition temperature (vTrs) at the plate thickness center is not more than -50°C.
Abstract:
PROBLEM TO BE SOLVED: To provide a grain-oriented silicon steel sheet capable of effectively reducing noise when the grain-oriented magnetic steel sheet is worked into a transformer.SOLUTION: The respective lengths: d of plastic strain regions in the width direction of a steel sheet are controlled to 0.05 to 0.4 mm, and also, the ratio of the total Σd of the lengths: d to the total Σw of the respective introduction intervals: w of the plastic strain regions, (Σd/Σw) is controlled to 0.2 to 0.6.
Abstract translation:要解决的问题:提供一种能够在将晶粒取向电磁钢板加工成变压器时有效地降低噪音的晶粒取向硅钢板。解决方案:在宽度方向上的塑性应变区域的各自长度:d 将钢板控制在0.05-0.4mm,并且长度d的总和S与总塑料应变区域的引入间隔的总和的比值(&Sgr; d / &Sgr; w)控制在0.2至0.6。
Abstract:
Provided is a grain-oriented electromagnetic steel sheet in which the development of side strains can be reliably inhibited and even portions where side strains have occurred can be left in the product. In the grain-oriented electromagnetic steel sheet of the present invention, a glass coating film (12) at one end side in the width direction of a steel sheet (11) has a linear modified section (14) formed as a continuous line or discontinuous broken line along the direction parallel to the rolling direction of the steel sheet and having a composition different from that of other portions of the glass coating film. The average value of angular displacement between the direction of axis of easy magnetization of crystal grains and the rolling direction at positions in the width direction of the steel sheet that correspond to the linear modified section (14), in the base metal portion of the steel sheet (11), is 0°-20°.