There is provided a method for manufacturing an alloy ribbon that suppresses different magnetic properties at each position of the alloy ribbon obtained by crystallizing an amorphous alloy ribbon. The method for manufacturing an alloy ribbon includes: heating a laminated body in which positions of thick portions of a plurality of amorphous alloy ribbons are shifted to a first temperature range less than a crystallization starting temperature; and heating an end portion in a lamination direction of the laminated body to a second temperature range equal to or more than the crystallization starting temperature after the heating the laminated body. An ambient temperature is held after heating the laminated body such that the laminated body is maintained within a temperature range in which the laminated body can be crystallized by heating the end portion to the second temperature range.

There is provided a method for manufacturing an alloy ribbon that suppresses different magnetic properties at each position of the alloy ribbon obtained by crystallizing an amorphous alloy ribbon. The method for manufacturing an alloy ribbon includes: heating a laminated body in which positions of thick portions of a plurality of amorphous alloy ribbons are shifted to a first temperature range less than a crystallization starting temperature; and heating an end portion in a lamination direction of the laminated body to a second temperature range equal to or more than the crystallization starting temperature after the heating the laminated body. An ambient temperature is held after heating the laminated body such that the laminated body is maintained within a temperature range in which the laminated body can be crystallized by heating the end portion to the second temperature range.

This disclosure is related to high yield strength steel where mechanical properties, such as elongation, ultimate tensile strength and yield strength in a sheet are maintained or enhanced via thermal treatment optionally provided during a galvanization coating operation.

Methods of producing high strength continuously cast hot rolled steel sheet products are disclosed. The methods include continuously casting a steel slab and then hot rolling with finish rolling on a hot strip mill, quenching on the hot strip mill to form a predominantly matrensitic microstructure, and performing a thermal cycling step including soaking at an intercritical temperature followed by holding at a lower temperature. The resultant hot rolled steel sheet products have a microstructure comprising ferrite and retained austenite. Steels processed in accordance with the present invention exhibit favorable combined ultimate tensile strength and total elongation (UTS.Math.TE) properties, and may fall into the category of Generation 3 advanced high strength steels, desirable in various industries including automobile manufacturers.

A cold-rolled flat steel product for packaging materials has a thickness of less than 0.6 mm, which has been cold-rolled from steel along a rolling direction (0°) and which has an excellent isotropy with respect to its mechanical properties.

A case hardening steel having excellent fatigue resistance is provided at relatively low production cost. A case hardening steel has a chemical composition containing C: 0.10% to 0.30%, Si: 0.10% to 1.20%, Mn: 0.30% to 1.50%, S: 0.010% to 0.030%, Cr: 0.10% to 1.00%, B: 0.0005% to 0.0050%, Sb: 0.005% to 0.020%, and N: 0.0150% or less in a predetermined range, and further containing Al: 0.010%≤Al≤0.120% in the case where B−(10.8/14)N≥0.0003%, and 27/14[N−(14/10.8)B+0.030]≤Al≤0.120% in the case where B−(10.8/14)N<0.0003%.

The disclosed martensitic stainless steel is defined in its composition is by specified ranges of weight percentages of C; Mn; Si; ≤Mn+Si; ≤S; 10,000×Mn×S; P; Cr, with [Cr−10.3−80*(C+N).sup.2]≤(Mn+Ni); Ni; Mo; Mo+2W; Cu; Ti; V; Zr; Al; O; Ta; Nb; (Nb+Ta)/(C+N); Nb; N; Co; Cu+Co; Cu+Co+Ni; B; rare earths+Y; Ca; the remainder being iron and impurities resulting from processing. Its microstructure includes at least 75% martensite, at most 20% ferrite and at most 0.5% carbides, the size of the ferrite grains being between 4 and 80 μm, preferably between 5 and 40 μm. Also disclosed is a method of manufacturing such steel.

A steel composition, a reinforcement part of a vehicle using the steel composition and a method of manufacturing the reinforcement part using the steel composition are provided. In particular, the steel composition includes increased content of carbon components and the steel composition is processed by rapid heating and immediate quenching.

A hot stamped article having excellent shock absorption having a predetermined chemical composition, having a microstructure containing prior austenite having an average grain size of 3 μm or less and further containing at least one of lower bainite, martensite, and tempered martensite in an area ratio of 90% or more, and having a grain boundary solid solution ratio Z defined by Z=(mass % of one or both of Nb and Mo at grain boundaries)/(mass % of one or both of Nb and Mo at time of melting) of 0.3 or more.

A precipitation hardenable, martensitic stainless steel is disclosed. The alloy has the following broad composition in weight percent. TABLE-US-00001 Ni 10.5-12.5 Co 1.0-6.0 Mo 1.0-4.0 Ti 1.5-2.0 Cr  8.5-11.5 Al Up to 0.5 Mn  1.0 max. Si 0.75 max. B 0.01 max.
The balance of the alloy is iron and the usual impurities found in commercial grades of precipitation hardenable martensitic stainless steels as known to those skilled in the state of the art in melting practice for such steels. A method of making parts from the alloy and an article of manufacture made from the alloy are also described.