A tool bit includes a hexagonal drive portion, a working end, and a shank. The working end is made of a first material and a has a first hardness. The shank connects the drive portion to the working end. The shank defines a longitudinal axis about which the tool bit is rotatable. The shank is made of a second material having a second, different hardness. The shank includes a protrusion and an annular shoulder. The shank extends within a portion of the working end and has a distal end. The annual shoulder surrounds the protrusion. At least one of the distal end or the shoulder is oriented perpendicular to the longitudinal axis.

A sinterable paste formulation usable as cast material in a cast-mold process, in combination with a mold material formulation, is provided. The sinterable paste formulation comprises a power of a sinterable material, in an amount of at least 85% by weight of the total weight of the formulation, a binder as described in the specification, and an aqueous solution which comprises water and a water-miscible organic solvent featuring an evaporation rate in a range of from 0.3 to 0.8 on an n-butyl acetate scale. Methods employing the formulation and objects and products obtained therefrom are also provided.

Provided is a resin for core used for injection molding, with which an inner surface of an outer molded body is less likely to be roughened, and an inner surface of a finally obtained molded body is smooth and less likely to have chipping. The resin for core includes a polyvinyl alcohol-based resin, used for an application in which a core is dissolved in water after an outer molded body is molded in an injection molding process, and includes an easy stripping agent that enhances easy stripping properties when the resin for core dissolves in a proportion of more than 0.1 wt % and less than 1.2 wt %.

A plasticizing apparatus, includes: a drive motor; a rotor that is rotated around a rotation axis by the drive motor and that has a groove forming surface on which a groove is formed; a barrel that has a facing surface facing the groove forming surface and that includes a communication hole in the facing surface; a heating portion that heats a material supplied to between the groove and the barrel; and a controller that controls the drive motor and the heating portion to plasticize the material supplied to between the groove and the barrel and discharge the material from the communication hole, the facing surface includes a first region and a second region that is closer to the communication hole than is the first region, the controller controls the heating portion to set a temperature of the second region to be higher than a temperature of the first region, and the controller controls the heating portion to reduce a temperature difference between the first region and the second region when the material includes a crystalline resin as compared with a case where the material includes an amorphous resin.

A permanent magnet includes R and T (R essentially includes Sm one or more of rare earth elements in addition to Sm, and T essentially includes Fe, or Fe and Co, one or more of transition metal elements in addition to Fe, or Fe and Co). A composition ratio of R in the permanent magnet is 20 at % or more and 40 at % or less. A remaining part is substantially only T, or only T and C. T amount is more than 1.5 times of R amount and less than 4.0 times of the R amount. Main phase grains included in the permanent magnet have an Nd5Fe17 type crystal structure. An average crystal grain size of the main phase grains of the permanent magnet is greater than 1 μm. A number ratio of main phase grains having a crystal grain size of less than 0.4 μm is less than 20%.

A permanent magnet includes R and T (R essentially includes Sm one or more of rare earth elements in addition to Sm, and T essentially includes Fe, or Fe and Co, one or more of transition metal elements in addition to Fe, or Fe and Co). A composition ratio of R in the permanent magnet is 20 at % or more and 40 at % or less. A remaining part is substantially only T, or only T and C. T amount is more than 1.5 times of R amount and less than 4.0 times of the R amount. Main phase grains included in the permanent magnet have an Nd5Fe17 type crystal structure. An average crystal grain size of the main phase grains of the permanent magnet is greater than 1 μm. A number ratio of main phase grains having a crystal grain size of less than 0.4 μm is less than 20%.

The present disclosure provides a copper nanowire composition. The a copper nanowire composition includes copper nanowire having associated alkylamine ligands with the structure HNR.sup.1R.sup.2. where R.sup.1 and R.sup.2 are independently hydrogen, alkyl or arylalkyl groups. The copper nanowire has an aspect ratio of at least 10. The associated alkylamine ligand is NR.sup.1R.sup.2 which contains at least 12 carbon atoms.

The invention relates to a stethoscope comprising a stethoscope chestpiece comprising a body member having a bottom surface and an ejector mark disposed on the bottom surface. The stethoscope chestpiece has a weight of at least 50 g, a surface roughness (Ra) no greater than 1.6 microns in an unpolished state, and reflectivity (% R) of at least 60% in an unpolished state. The stethoscope chestpiece can be produced by injection molding, extruding, or pressing a metallic thermoplastic composition into a mould forming a green molded body, debinding a portion of binder material from green molded body forming a brown molded body without reducing the temperature by more than 80° C., and sintering the brown molded body to form the stethoscope chestpiece.

The invention relates to a stethoscope comprising a stethoscope chestpiece comprising a body member having a bottom surface and an ejector mark disposed on the bottom surface. The stethoscope chestpiece has a weight of at least 50 g, a surface roughness (Ra) no greater than 1.6 microns in an unpolished state, and reflectivity (% R) of at least 60% in an unpolished state. The stethoscope chestpiece can be produced by injection molding, extruding, or pressing a metallic thermoplastic composition into a mould forming a green molded body, debinding a portion of binder material from green molded body forming a brown molded body without reducing the temperature by more than 80° C., and sintering the brown molded body to form the stethoscope chestpiece.

An austenitic stainless-steel powder having a nickel content of less than or equal to 0.5% by weight and a specific carbon content that is greater than or equal to 0.05% and less than or equal to 0.11% by weight. A method for manufacturing the powder by powder metallurgy and parts resulting from the manufacturing method, which have the characteristic of having a deoxidised layer on the surface of the part extending over a thickness greater than or equal to 200 μm.