A method of producing a finished essentially 100% dense homogenous alloyed metallic product. First, a metal powder is provided comprised of particles with each particle having a predetermined alloy content. Next, the metal powder is blended with a mixture of a lubricant and a binder to form a composite powder. That composite powder is then compacted in a compacting die at room temperature to form a green part. The lubricant and binder are then removed by heating the green part to at least a first temperature profile in a confined atmosphere with a predetermined dew point profile. Next, the remaining green part is heated to a second temperature higher than the first temperature and with predetermined dew point and H.sub.2/H.sub.2O ratio in a furnace atmosphere to remove surface oxides from the part. Finally, the part is densified into a finished or near net shape homogenous alloyed product.

A high-performance NdFeB permanent magnet including a nitride phase and a production method thereof are provided. A main phase of the NdFeB permanent magnet has a structure of R.sub.2T.sub.14B; a grain boundary phase is distributed around the main phase and contains N, F, Zr, Ga and Cu; a composite phase containing R1, Tb and N exists between the main phase and the grain boundary phase and includes a phase having a structure of (R1, Tb).sub.2T.sub.14(B, N). R represents at least two rare earth elements, and includes Pr and Nd; T represents Fe, Mn, Al and Co; R1 represents at least one rare earth element, and includes at least one of Dy and Tb; the main phase contains Pr, Nd, Fe, Mn, Al, Co and B; and the grain boundary phase further contains at least one of Nb and Ti. Through placing partially B by N, a magnetic performance is increased.

A high-performance NdFeB permanent magnet including a nitride phase and a production method thereof are provided. A main phase of the NdFeB permanent magnet has a structure of R.sub.2T.sub.14B; a grain boundary phase is distributed around the main phase and contains N, F, Zr, Ga and Cu; a composite phase containing R1, Tb and N exists between the main phase and the grain boundary phase and includes a phase having a structure of (R1, Tb).sub.2T.sub.14(B, N). R represents at least two rare earth elements, and includes Pr and Nd; T represents Fe, Mn, Al and Co; R1 represents at least one rare earth element, and includes at least one of Dy and Tb; the main phase contains Pr, Nd, Fe, Mn, Al, Co and B; and the grain boundary phase further contains at least one of Nb and Ti. Through placing partially B by N, a magnetic performance is increased.

Provided is a heat sink that has a clad structure of a CuMo composite material and a Cu material and has a low coefficient of thermal expansion and high thermal conductivity. The heat sink comprises a pair of CuMo composite layers and a Cu layer stacked in a thickness direction so that the Cu layer is interposed between the CuMo composite layers or comprises three or more CuMo composite layers and two or more Cu layers alternately stacked in the thickness direction so that two of the CuMo composite layers are outermost layers on both sides, wherein each of the CuMo composite layers has a thickness section microstructure in which flat Mo phase is dispersed in a Cu matrix. Such a clad structure achieves high thermal conductivity together with a low coefficient of thermal expansion.

Provided is a heat sink that has a clad structure of a CuMo composite material and a Cu material and has a low coefficient of thermal expansion and high thermal conductivity. The heat sink comprises a pair of CuMo composite layers and a Cu layer stacked in a thickness direction so that the Cu layer is interposed between the CuMo composite layers or comprises three or more CuMo composite layers and two or more Cu layers alternately stacked in the thickness direction so that two of the CuMo composite layers are outermost layers on both sides, wherein each of the CuMo composite layers has a thickness section microstructure in which flat Mo phase is dispersed in a Cu matrix. Such a clad structure achieves high thermal conductivity together with a low coefficient of thermal expansion.

A method for manufacturing iron-based metallurgical parts, the method comprising: mixing graphite powder; pressing; presintering; oxidizing the presintered metallurgical part to form an oxide layer having a thickness of 1 m to 50 m on its surface to form an oxidized presintered metallurgical part; sintering; machining; carburizing; quenching and tempering. An oxide layer is formed on the surface of a part by oxidization, oxygen in the oxide layer is chemically reacted with the carbon in the surface layer of the product during the sintering, and the resulting product enters a sintering atmosphere in the form of gas to form a decarburized layer having a certain thickness on the surface of the part, so that the decarburization is realized.

A method for manufacturing iron-based metallurgical parts, the method comprising: mixing graphite powder; pressing; presintering; oxidizing the presintered metallurgical part to form an oxide layer having a thickness of 1 m to 50 m on its surface to form an oxidized presintered metallurgical part; sintering; machining; carburizing; quenching and tempering. An oxide layer is formed on the surface of a part by oxidization, oxygen in the oxide layer is chemically reacted with the carbon in the surface layer of the product during the sintering, and the resulting product enters a sintering atmosphere in the form of gas to form a decarburized layer having a certain thickness on the surface of the part, so that the decarburization is realized.

A metal shaped article production method includes a shaping data input step, a step of forming a constituent material layer using a constituent material, a step of forming a support material layer using a support material, a step of cutting a cut face in the constituent material layer of a stacked body formed by performing the constituent material layer forming step and the support material layer forming step, a step of degreasing a thermoplastic resin contained in the stacked body for which the cut face cutting step was performed, and a step of sintering metal particles by heating the stacked body, wherein in the support material layer forming step, the support material layer is formed so that a support face comes into contact with a face to be supported at an opposite side to the cut face at a position of the constituent material layer based on the shaping data.

A metal shaped article production method includes a shaping data input step, a step of forming a constituent material layer using a constituent material, a step of forming a support material layer using a support material, a step of cutting a cut face in the constituent material layer of a stacked body formed by performing the constituent material layer forming step and the support material layer forming step, a step of degreasing a thermoplastic resin contained in the stacked body for which the cut face cutting step was performed, and a step of sintering metal particles by heating the stacked body, wherein in the support material layer forming step, the support material layer is formed so that a support face comes into contact with a face to be supported at an opposite side to the cut face at a position of the constituent material layer based on the shaping data.

Provided is a method of manufacturing a magnet capable of using only a single pole, whereby a combination force between a permanent (or referred to as a magnet) and a yoke (or referred to as a shielding metal) can be improved without performing a manual bonding work therebetween and then the efficiency of subsequent processes, such as polishing and plating, after combination and completeness of a product can be improved.