Abstract: Provided is a plated steel sheet having both strength and workability. In a hot-dip Zn—Al—Mg-based plated steel sheet, the steel substrate contains C in an amount of 0.050 to 0.180% by mass, Si in an amount of 0.001 to 0.50% by mass, Mn in an amount of 1.00 to 2.80% by mass, Ti in an amount of 0.01 to 0.10% by mass, and B in an amount of 0.0005 to 0.0100% by mass, an average grain size of cementite after winding in a hot rolling step is not greater than 2 ?m, a metal structure after a continuous hot-dip galvanizing step includes a ferrite phase and not less than 15 and less than 45% by area of a second phase, and the second phase is composed of martensite or composed of martensite and bainite and has an average crystal grain size of not greater than 8 ?m.

Abstract: A high-strength plated steel plate for a welded structural member having a steel composition containing from 0.050 to 0.150% of C, from 0.001 to 1.00% of Si, from 1.00 to 2.50% of Mn, from 0.005 to 0.050% of P, from 0.001 to 0.020% of S, and from 0.005 to 0.100% of Al, having a steel base material having a metal structure containing a ferrite phase and a second phase containing mainly martensite having an average crystal grain diameter of 8 mm or less, and having a chemical composition and a thickness t (mm) of the steel base material regulated to obtain a value, C/0.2+Si/5.0+Mn/1.3+Cr/1.0+Mo/1.2+0.4t?0.7(Cr+Mo)1/2, of 2.9 or less. The high-strength plated steel plate is excellent in corrosion resistance of the welded portion, resistance to liquid metal embrittlement cracking, and bending workability.

Abstract: A high-strength plated steel plate for a welded structural member having a steel composition containing from 0.050 to 0.150% of C, from 0.001 to 1.00% of Si, from 1.00 to 2.50% of Mn, from 0.005 to 0.050% of P, from 0.001 to 0.020% of S, and from 0.005 to 0.100% of Al, having a steel base material having a metal structure containing a ferrite phase and a second phase containing mainly martensite having an average crystal grain diameter of 8 mm or less, and having a chemical composition and a thickness t (mm) of the steel base material regulated to obtain a value, C/0.2+Si/5.0+Mn/1.3+Cr/1.0+Mo/1.2+0.4t?0.7(Cr+Mo)1/2, of 2.9 or less. The high-strength plated steel plate is excellent in corrosion resistance of the welded portion, resistance to liquid metal embrittlement cracking, and bending workability.

Abstract: [Problem] To provide a steel sheet hot-dip-plated with a Zn—Al—Mg-based alloy coating, which is remarkably improved in point of all the burring workability, the liquid metal embrittlement cracking resistance and the corrosion resistance in the welded part thereof, as a steel material favorable for arc-welded structural members.

Abstract: [Problem] To produce a hot-dip Zn—Al—Mg alloy coated steel sheet that is excellent in coating adhesion, by using, as a base sheet for coating, a steel sheet that is imparted with resistance to liquid metal embrittlement cracking by adding B. [Solution] A hot-dip zinc alloy coated steel sheet excellent in coating adhesion containing at least one of a Si simple oxide, a Mn simple oxide, a Cr simple oxide, a Si—Mn composite oxide, a Si—Cr composite oxide, a Mn—Cr composite oxide, and a Si—Mn—Cr composite oxide in a portion within 10 ?m from an interface between a steel sheet as a base sheet for coating, and a hot-dip galvanized layer formed on a surface thereof.

Abstract: A method for producing a hot-dip zinc alloy coated steel sheet excellent in coating adhesion, comprising: hot-rolling a steel sheet, subjecting the base sheet for coating to a reduction heat treatment, and subjecting the base sheet for coating to hot-dip zinc alloy coating. The hot-dip alloy coated steel sheet is excellent in coating adhesion, by using, as a base sheet for coating, a steel sheet that is imparted with resistance to liquid metal embrittlement cracking by adding B. The hot-dip zinc alloy coated steel sheet excellent in coating adhesion contains at least one of a Si simple oxide, a Mn simple oxide, a Cr simple oxide, a Si—Mn composite oxide, a Si—Cr composite oxide, a Mn—Cr composite oxide, and a Si—Mn—Cr composite oxide in a portion within 10 ?m from an interface between a steel sheet as a base sheet and a hot-dip galvanized layer formed on a surface thereof.

Abstract: A high-strength plated steel plate for a welded structural member having a steel composition containing from 0.050 to 0.150% of C, from 0.001 to 1.00% of Si, from 1.00 to 2.50% of Mn, from 0.005 to 0.050% of P, from 0.001 to 0.020% of S, and from 0.005 to 0.100% of Al, having a steel base material having a metal structure containing a ferrite phase and a second phase containing mainly martensite having an average crystal grain diameter of 8 mm or less, and having a chemical composition and a thickness t (mm) of the steel base material regulated to obtain a value, C/0.2+Si/5.0+Mn/1.3+Cr/1.0+Mo/1.2+0.4t?0.7(Cr+Mo)1/2, of 2.9 or less. The high-strength plated steel plate is excellent in corrosion resistance of the welded portion, resistance to liquid metal embrittlement cracking, and bending workability.

Abstract: [Problem] To produce a hot-dip Zn—Al—Mg alloy coated steel sheet that is excellent in coating adhesion, by using, as a base sheet for coating, a steel sheet that is imparted with resistance to liquid metal embrittlement cracking by adding B. [Solution] A hot-dip zinc alloy coated steel sheet excellent in coating adhesion containing at least one of a Si simple oxide, a Mn simple oxide, a Cr simple oxide, a Si—Mn composite oxide, a Si—Cr composite oxide, a Mn—Cr composite oxide, and a Si—Mn—Cr composite oxide in a portion within 10 ?m from an interface between a steel sheet as a base sheet for coating, and a hot-dip galvanized layer formed on a surface thereof.

Abstract: [Problem] To provide a steel sheet hot-dip-plated with a Zn—Al—Mg-based alloy coating, which is remarkably improved in point of all the burring workability, the liquid metal embrittlement cracking resistance and the corrosion resistance in the welded part thereof, as a steel material favorable for arc-welded structural members.

Abstract: A high-strength, high-permeability steel sheet for picture tube band comprises, in mass percent, C: 0.003-0.010%, Si: 0.5-1.0%, Mn: 1.0-2.0%, P: 0.04-0.15%, S: not more than 0.02%, Al: not more than 0.030%, N: not more than 0.004% and the balance of Fe and unavoidable impurities, has a chemical composition satisfying C×Mn×P?2.5×10?4, and has a ferrite crystal grain diameter of 10-100 ?m and a yield stress of 300 N/mm2 or higher, and preferably has a specific permeability ?0.35 in a DC magnetic field of 0.35 Oe of 400 or higher. The steel sheet can be produced by regulating the hot-rolling coiling temperature to 600-700° C. and selecting an appropriate combination of the cold rolling reduction ratio and a final annealing temperature in the range of 750-900° C.

Abstract: A high-strength, high-permeability steel sheet for picture tube band comprises, in mass percent, C: 0.003-0.010%, Si: 0.5-1.0%, Mn: 1.0-2.0%, P: 0.04-0.15%, S: not more than 0.02%, Al: not more than 0.030%, N: not more than 0.004% and the balance of Fe and unavoidable impurities, has a chemical composition satisfying C×Mn×P?2.5×10?4, and has a ferrite crystal grain diameter of 10-100 ?m and a yield stress of 300 N/mm2 or higher, and preferably has a specific permeability ?0.35 in a DC magnetic field of 0.35 Oe of 400 or higher. The steel sheet can be produced by regulating the hot-rolling coiling temperature to 600-700° C. and selecting an appropriate combination of the cold rolling reduction ratio and a final annealing temperature in the range of 750-900° C.

Abstract: A method of separating chemical components in a simulated-moving-bed type continuous separator comprising a series of plural packed beds filled with adsorbent for selectively adsorbing a specific component in a crude solution, in which the packed beds are divided into three zones, and the functions assigned to the respective packed beds are successively shifted to the downstream side of the flow by the quantity of one bed by means of switching means such as a channel switching control valve comprising a stationary disc and a rotary disc rotatable thereon, thereby extracting a product solution containing a high percentage of the specific component.

Abstract: A porous aluminum anode element having an increased effective surface area is prepared by an electrolytic etching process using an etchant solution containing CrO.sub.4 .sup.-- in a higher concentration and a lower current density than those heretofore proposed. Currents of a digital signal type, such as a pulse current, or those of triangular, sawtooth, trapezoidal or staircase waveform, are preferred.