A soft magnetic alloy including a main component having a compositional formula of (Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b+c))M.sub.aB.sub.bP.sub.c, and a sub component including at least C, S and Ti, wherein X1 is one or more selected from the group including Co and Ni, X2 is one or more selected from the group including Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, M is one or more selected from the group including Nb, Hf, Zr, Ta, Mo, W, and V, 0.020a0.14, 0.020b0.20, 0c0.040, 0, 0, and 0+0.50 are satisfied, when entire said soft magnetic alloy is 100 wt %, a content of said C is 0.001 to 0.050 wt %, a content of said S is 0.001 to 0.050 wt %, and a content of said Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing the content of said C by the content of said S is C/S, then C/S satisfies 0.10C/S10.

A soft magnetic alloy comprising a main component having a compositional formula of ((Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b+c))M.sub.aB.sub.bCr.sub.c).sub.1dC.sub.d, and a sub component including P, S and Ti, wherein X1 is selected from the group Co and Ni, X2 is selected from the group Al, Mn, Ag, Zn, Sn, As, Sb, Bi and rare earth elements, M is selected from the group Nb, Hf, Zr, Ta, Mo, W and V, 0.030a0.14, 0.005b0.20, 0<c0.040, 0d0.040, 0, 0, and 0+0.50 are satisfied, when soft magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10P/S10.

A problem to be solved is to provide a metal powder having a variety of excellent performances, and, in order to solve such a problem, the present invention provides a metal powder that is composed of many spherical particles; that includes at least one of Ni, Fe, and Co, in which the total content (T.C.) of the Ni, the Fe, and the Co is 50 mass % or more; that has a cumulative 10 vol % particle size D10 of 1.0 m or more; and in which a value Y is 7.5 to 24.0 as calculated by the following mathematical equation: Y=D50S, where D50 represents a cumulative 50 vol % particle size of the powder, represents a true density of the powder, and S represents a specific surface area of the powder.

The present invention provides an antibacterial and antiviral copper-containing stainless steel, and a preparation method for and the use of a stainless-steel conforming to the composition thereof. The copper-containing stainless steel comprises a stainless steel matrix and a copper-rich phase evenly distributed in the stainless steel matrix, wherein the copper content of the copper-containing stainless steel is 6-30 wt %. The preparation method therefor comprises the manufacturing of a small stainless steel product mainly using powder metallurgy technology, and the manufacturing of a large stainless steel sheet, bar or pipe mainly using a composite process without significant thermal deformation. Compared with a traditional antibacterial stainless steel, the composition design of the present invention contains sufficient copper-rich precipitated phases, such that the antibacterial and antiviral copper-containing stainless steel of the present invention can achieve both a good killing effect on bacteria and a virus killing capacity comparable with that of pure copper, can be used for preparing the integral body or the whole of parts such as cutters, elevator buttons, railings, handrails, door handles and cups, and can effectively kill bacteria and viruses existing on the surfaces thereof.

A rare earth sintered magnet is an anisotropic sintered body comprising Nd.sub.2Fe.sub.14 B crystal phase as primary phase and having the composition R.sup.1.sub.aT.sub.bM.sub.cSi.sub.dB.sub.e wherein R.sup.1 is a rare earth element inclusive of Sc and Y, T is Fe and/or Co, M is Al, Cu, Zn, In, P, S, Ti, V, Cr, Mn, Ni, Ga, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sn, Sb, Hf, Ta, or W, a to e are 12a17, 0c10, 0.3d7, 5e10, and the balance of b, wherein Dy and/or Tb is diffused into the sintered body from its surface.

A semi-manufactured steel material has a chemical composition including, by mass %, C: 0.055% to 0.15%, Si: not more than 0.2%, Mn: not more than 1.3%, P: not more than 0.03%, S: not more than 0.007%, Al: not more than 0.1%, N: not more than 0.01%, and Ti: 0.14% to 0.30%, the balance comprising Fe and inevitable impurities. In the composition, 1.0([C]/12)/([Ti*]/48) is satisfied ([C], [S], [N] and [Ti]: contents (mass %) of the respective elements, and [Ti*]=[Ti]3.4[N]1.5[S]), and the contents of niobium and boron as impurities are limited to Nb: less than 0.03% and B: less than 0.0005%.

A stainless steel pipe of a predetermined composition is provided that has an axial tensile yield strength of 689 MPa or more, an axial compressive yield strength/axial tensile yield strength ratio of 0.85 to 1.15, and a microstructure that is 20 to 80% ferrite phase by volume with the remainder containing an austenite phase, the stainless steel pipe having pipe end portions at least one of which has a fastening portion for an external thread or an internal thread, and having a curvature radius of 0.2 mm or more for a corner R formed by a bottom surface of a thread root and a pressure-side flank surface of the thread, measured in an axial plane section of the fastening portion.

Provided is an annealing facility that contributes to further improvement of magnetic properties by more active control of carbon in steel. An annealing facility includes a heating zone, a soaking zone, and a cooling zone on a conveyance line for a steel strip. The conveyance line is capable of passing a steel strip with a thickness of 2.8 mm or more, the soaking zone has means for maintaining an ambient temperature at 900 C. or higher, the cooling zone has means for supplying a refrigerant to the steel strip and maintaining an average cooling rate of 50 C./s or higher in a temperature region of 750 C. or lower and 120 C. or higher, and the annealing facility includes removal means for removing the refrigerant on an exit side of the cooling zone.

A method of manufacturing tubing from a well-defined steel composition. in particular fat a suited gas inflator pressure vessel comprises the steps: a) producing a steel tubing from a steel composition including at least one hot rolling or hot forming pass: b) subjecting the steel tubing to a cold-drawing process to obtain desired dimensions. wherein the cold-drawing process comprises at least too pulls and before the first pull of the cold-drawn tug process an intermediate austenizing and quenching step: c) subsequently performing a final recovery heat treatment on the cold-drawn steel tubing at a temperature in the range of 200-600 C.