In a method for manufacturing a component containing an iron alloy material, a pulverulent pre-alloy is provided. The pre-alloy comprises, in wt. %, 0.01 to 1% C, .0.01 to 30% Mn, 6% Al, and 0.05 to 6.0% Si, the remainder being Fe and usual contaminants. The pulverulent pre-alloy is mixed with at least one of elementary Ag powder, elementary Au powder, elementary Pd powder and elementary Pt powder so as to produce a powder mixture containing 0.1 to 20% of at least one of Ag, Au, Pd and Pt. The powder mixture is applied onto a carrier (16) by means of a powder application device (14). Electromagnetic or particle radiation is selectively irradiated onto the powder mixture applied onto the carrier (16) by means of an Irradiation device (18) so as to generate a component from the powder mixture by an additive layer construction method.

The present disclosure relates to a micron silver particle-reinforced 316L stainless steel matrix composite, including a 316L stainless steel matrix and silver particles uniformly distributed in the 316L stainless steel matrix. The silver particles have a weight 1% to 5% of the total weight of the composite; and the composite has a density of 7.9 g/cm.sup.3 to 8.2 g/cm.sup.3 and a relative density of more than 98%. The composite is prepared by the following method: mixing raw materials of a spherical silver powder and a spherical 316L stainless steel powder; subjecting a resulting mixture to mechanical ball milling to obtain a mixed powder; sieving the mixed powder and adding a resulting powder to a powder cylinder of an SLM forming machine; and charging an inert protective gas for printing to obtain the composite.

Disclosed is a soft magnetic powder including a main component represented by composition formula: (Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b+c+d+e+f))M.sub.aB.sub.bP.sub.cSi.sub.dC.sub.eS.sub.f. X1 represents one or more selected from the group consisting of Co and Ni; X2 represents one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, and rare earth elements; and M represents one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, Ti, and V. The following relations are satisfied: 0a0.140; 0.020<b0.200; 0<c0.150; 0d0.060; 0e0.030; 0f0.010; 0; 0; and 0+0.50. An oxygen content ratio in the soft magnetic powder is from 300 ppm to 3,000 ppm as a mass ratio.

Disclosed is a soft magnetic powder including a main component represented by composition formula: (Fe.sub.(1-(+))X1.sub.X2.sub.).sub.(1-(a+b+c+d+e+f))M.sub.aB.sub.bP.sub.cSi.sub.dC.sub.eS.sub.f. X1 represents one or more selected from the group consisting of Co and Ni; X2 represents one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, and rare earth elements; and M represents one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, Ti, and V. The following relations are satisfied: 0a0.140; 0.020<b0.200; 0<c0.150; 0d0.060; 0e0.030; 0f0.010; 0; 0; and 0+0.50. An oxygen content ratio in the soft magnetic powder is from 300 ppm to 3,000 ppm as a mass ratio.

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.

A manufacturing method of rare earth magnet based on heat treatment of fine powder includes the following: an alloy for the rare earth magnet is firstly coarsely crushed and then finely crushed by jet milling to obtain a fine powder; the fine powder is heated in vacuum or in inert gas atmosphere at a temperature of 100 C.1000 C. for 6 minutes to 24 hours; then the fine powder is compacted under a magnet field and is sintered in vacuum or in inert gas atmosphere at a temperature of 950 C.1140 C. to obtain a sintered magnet; and machining the sintered magnet to obtain a magnet; then the magnet performs a RH grain boundary diffusion at a temperature of 700 C.1020 C. An oxidation film forms on the surface of all of the powder.

A manufacturing method of an alloy powder for rare earth magnet and the rare earth magnet based on heat treatment includes the following: an alloy of the rare earth magnet is firstly coarsely crushed and then finely crushed by jet milling to obtain a fine powder; the fine powder is obtained by being heated in vacuum or in inert gas atmosphere at a temperature of 100 C.1000 C. for 6 minutes to 24 hours. The heat treatment of fine powder is performed after the process of finely crushed jet milling before the process of compacting under a magnetic field, so that the sintering property of the powder is changed drastically, and it obtains a magnet with a high coercivity, a high squareness and a high heat resistance.

There is provided a raw material cold-rolled steel sheet with Fe-based coating film excellent in primary rust prevention property or plating appearance. The raw material cold-rolled steel sheet with Fe-based coating film comprises: a base steel sheet having a chemical composition containing C of 0.80 mass % or less, Si of 0.10 mass % or more and 3.00 mass % or less, Mn of 1.50 mass % or more and 3.50 mass % or less, P of 0.100 masse or less; S of 0.0300 mass % or less, Al of 0.100 mass % or less, with a remaining part consisting of Fe and inevitable impurities; and a P-adhered Fe-based coating film containing an Fe-based coating film disposed on at least one surface of the base steel sheet and a P-containing substance adhered to a surface of the Fe-based coating film, and an adhesion amount of the P-containing substance in terms of P is 0.2 mg/m.sup.2 or more.

The present invention discloses a low-B rare earth magnet. The rare earth magnet contains a main phase of R.sub.2T.sub.14B and comprises the following raw material components: 13.5 at %4.5 at % of R, 5.2 at %5.8 at % of B, 0.3 at %0.8 at % of Cu, 0.3 at %3 at % of Co, and the balance being T and inevitable impurities, the R being at least one rare earth element comprising Nd, and the T being an element mainly comprising Fe. 0.30.8 at % of Cu and an appropriate amount of Co are co-added into the rare earth magnet, so that three Cu-rich phases formed in the grain boundary, and the magnetic effect of the three Cu-rich phases existing in the grain boundary and the solution of the problem of insufficient B in the grain boundary can obviously improve the squareness and heat-resistance of the magnet.

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.