A controlled thermal coefficient product manufacturing system and method is disclosed. The disclosed product relates to the manufacture of metallic material product (MMP) having a thermal expansion coefficient (TEC) in a predetermined range. The disclosed system and method provides for a first material deformation (FMD) of the MMP that comprises at least some of a first material phase (FMP) wherein the FMP comprises martensite randomly oriented and a first thermal expansion coefficient (FTC). In response to the FMD at least some of the FMP is oriented in at least one predetermined orientation. Subsequent to deformation, the MMP comprises a second thermal expansion coefficient (STC) that is within a predetermined range and wherein the thermal expansion of the MMP is in at least one predetermined direction. The MMP may be comprised of a second material phase (SMP) that may or may not transform to the FMP in response to the FMD.

In some embodiments, a process treats a turbine component. The turbine component includes an article and a wear component brazed to the article. The process includes applying a braze tape on at least a portion of the wear component and thermal processing the turbine component while the braze tape is on the at least a portion of the wear component to treat the turbine component. In some embodiments, an assembly includes a turbine component. The turbine component includes an article and a pre-sintered preform brazed to a surface of the article. The assembly also includes a braze tape on at least a portion of the pre-sintered preform. In some embodiments, a treated turbine component includes a treated article and a pre-sintered preform brazed to a surface of the treated article. The treated turbine component has been thermally processed with the pre-sintered preform being substantially free of re-flow.

A method of steel processing combining thermal and mechanical processing of steels in controlled sequences. The method of the present invention combines thermal and mechanical processing in controlled sequences to achieve material property results that are superior to existing methods. The method allows for manipulation of steel processing variables, which promotes further elimination of retained austenite, additional residual compression, reduced surface tension, increased material strength, increased compressive stresses at the surface, and significantly improved bending fatigue and wear resistance. By varying the sequence of mechanical processing of the steel, desired residual compressive stress responses and hardness levels may be achieved. In addition, this processing can reduce embrittlement caused by late stage phase transformation.

A method for producing a cold rolled steel sheet having a tensile strength1470 MPa and a total elongation TE19%, the method comprising the steps of annealing at an annealing temperature ATAc3 a non-treated steel sheet whose chemical composition contains in weight %: 0.34%C0.40%, 1.50%Mn2.30%, 1.50Si2.40%, 0<Cr0.5%, 0%<Mo0.3%, 0.01%Al0.07%, the remainder being Fe and unavoidable impurities, quenching the annealed steel sheet by cooling it to a quenching temperature QT<Ms transformation point and between 150 C. and 250 C., and making a partitioning treatment by reheating the quenched steel sheet to a partitioning temperature PT between 350 C. and 420 C. and maintaining the steel sheet at this temperature during a partitioning time Pt between 15 seconds and 120 seconds.

A method for producing a cold rolled steel sheet having a tensile strength 1470 MPa and a total elongation TE19%, the method comprising the steps of annealing at an annealing temperature ATAc3 a non-treated steel sheet whose chemical composition contains in weight %: 0.34%C0.40%, 1.50%Mn2.30%, 1.50Si2.40%, 0<Cr0.5%, 0<Mo0.3%, 0.01%Al0.07%, the remainder being Fe and unavoidable impurities, quenching the annealed steel sheet by cooling it to a quenching temperature QT<Ms transformation point and between 150 C. and 250 C., and making a partitioning treatment by reheating the quenched steel sheet to a partitioning temperature PT between 350 C. and 420 C. and maintaining the steel sheet at this temperature during a partitioning time Pt between 15 seconds and 120 seconds.

A method for producing a cold rolled steel sheet having a tensile strength 1470 MPa and a total elongation TE19%, the method comprising the steps of annealing at an annealing temperature ATAc3 a non-treated steel sheet whose chemical composition contains in weight %: 0.34%C0.40%, 1.50%Mn2.30%, 1.50Si2.40%, 0%<Cr0.5%, 0%<Mo0.3%, 0.01%A10.07%, the remainder being Fe and unavoidable impurities, quenching the annealed steel sheet by cooling it to a quenching temperature QT<Ms transformation point and between 150 C. and 250 C., and making a partitioning treatment by reheating the quenched steel sheet to a partitioning temperature PT between 350 C. and 420 C. and maintaining the steel sheet at this temperature during a partitioning time Pt between 15 seconds and 120 seconds.

One aspect of the present invention is a high strength steel sheet having a specific component composition, wherein a metal structure of the steel sheet comprises polygonal ferrite, bainite, tempered martensite, and retained austenite; when the metal structure is observed with a scanning electron microscope, the metal structure satisfies polygonal ferrite: 10 to 50 area %, bainite: 10 to 50 area %, and tempered martensite: 10 to 80 area % with respect to the metal structure overall; and when the metal structure is measured by X-ray diffractometry, the metal structure satisfies retained austenite: 5.0 volume % or more, retained austenite with a carbon concentration of 1.0 mass % or less: 3.5 volume % or more, and retained austenite with a carbon concentration of 0.8 mass % or less: 2.4 volume % or less with respect to the metal structure overall.

One aspect of the disclosure relates to a method of making a part from at least one elemental metal powder. The part has a near-net shape, a part volume, and a part density. The method includes providing a sintered preform having a sintered density and separating a portion from the sintered preform. The portion has a portion volume exceeding the part volume and a portion shape different from the near-net shape of the part. The method also includes thermally cycling the portion for a thermal-cycling time period at a thermal-cycling pressure while superplastically deforming the portion to form the part having the near net shape and the part density.

A method of heat treating a fastening member having a head portion, a shank portion, and a thread portion includes hardening the fastening member to a first hardness value. Hardening of the fastening member includes heating the fastening member at a first pre-set temperature value. The method also includes tempering the fastening member at a second pre-set temperature value to a second hardness value. The method further includes induction tempering the thread portion of the fastening member. Induction tempering of the thread portion includes heating the thread portion at a third pre-set temperature value to a third hardness value. The third hardness value of the thread portion is less than the second hardness value of the head portion and the shank portion.

Provided is a prehardened steel material containing: 0.05?C?0.25 mass %, 0.01?Si?1.00 mass %, 0.40?Mn?1.80 mass %, 0.0002?S?0.3000 mass %, 0.30?Cu?1.80 mass %, 2.00?Ni?3.90 mass %, 0.05?Cr?3.20 mass %, 0.05?Mo?0.80 mass %, and 0.30?Al?1.50 mass %, with a balance being Fe and unavoidable impurities, in which the prehardened steel material has: a cross-sectional size of 350 mm or more in width and 350 mm or more in height, a hardness of 34 to 43 HRC, an average value of prior austenite grain size being 85 ?m or less, and an average value of impact value being 18 J/cm.sup.2 or higher.