7results about How to "Fully solid solution" patented technology

The invention discloses a heat treatment method of a low alloy-stainless steel composite plate. The heat treatment method comprises the steps of quenching, tempering and stress relief treatment. In the quenching step, the composite plate is placed in a roller hearth type heating furnace to be heated, an upper layer radiation heating pipe and a lower layer radiation heating pipe are distributed on the roller hearth type heating furnace, a stainless steel coating of the composite plate is placed upwards, and a low-alloy base layer is placed downwards to be in contact with a heating furnace roller way; the initial temperature of the upper-layer radiation heating pipe and the lower-layer radiation heating pipe is set to be 880-890 DEG C, after heat preservation is carried out for 1.2-1.5 min / mm according to the total thickness, the temperature of the upper-layer radiation heating pipe is rapidly increased to 1000-1050 DEG C, the temperature of the lower-layer radiation heating pipe is kept unchanged, heat preservation is carried out for 1.0-2.0 min / mm according to the thickness of a stainless steel coating, and then the steel plate is discharged out of the furnace and enters a roller hearth type quenching machine to be cooled. The stainless steel layer obtained through the method is good in corrosion resistance and free of cracks after being bent through intergranular corrosion, the tensile strength of the steel plate is larger than or equal to 630 MPa, and the impact energy at the temperature of-40 DEG C is 200 J or above.

This invention relates to a high-strength pure nickel wire and its preparation method. The wire comprises, by mass percentage, 0.05%–0.15% C, 0.05%–0.15% Mn, 0.10%–0.35% Si, 0.10%–0.50% additive element X, with the balance being Ni. The C, Mn, Si, and X are all dissolved in a face-centered cubic nickel-based solid solution. The wire has a tensile strength of 400–500 MPa. The wire of this invention possesses advantages such as high tensile strength, stable mechanical properties, and controllable alloy mechanical properties, making it particularly suitable for preparing high-strength pure nickel filter screens.

This invention relates to the field of hot extrusion manufacturing technology, specifically to a high-strength weldable 6xxx series aluminum alloy profile, its manufacturing method, and its application. The aluminum alloy profile is composed of the following weight percentages: Si: 0.80%~1.2%, Fe≤0.20%, Cu: 0.40%~0.80%, Mn: 0.30%~0.70%, Mg: 0.70%~1.1%, Cr≤0.25%, Zn≤0.10%, Ti≤0.10%, Zr: 0.05%-0.20%, Pb<0.01%, with the balance being Al and unavoidable impurities. The profile meets the following performance requirements: tensile properties, R... m ≥420MPa, R p0.2 ≥330MPa, A 50mm ≥8.0%; Fatigue performance: at r=0.1, N=1×10 7 Under the same conditions, the fatigue strength σ of the smooth sample is ≥145MPa, realizing the lightweight manufacturing of high-speed trains.

The invention discloses a gold-palladium coated ultra-soft copper composite bonding wire and a preparation method thereof. The invention eliminates the internal stress generated by melting and casting through deep cryogenic treatment, and makes the added calcium, cerium and indium to be more fully solid-dissolved with copper, and the crystal arrangement direction is consistent, so that the coarse crystals inside the material are fragmented, and the crystal arrangement direction is more consistent, and at the same time, the solid solution between copper, calcium, cerium and indium atoms is more complete, and the atoms are more tightly bound, thereby improving the performance of the metal; through deep cryogenic treatment, the coarse crystals inside the material are fragmented, and the material structure is refined, thereby increasing the toughness of the material; through deep cryogenic treatment, the residual stress inside the material is transformed, and the parts where the internal stress is concentrated inside the material produce plastic rheology, and in the subsequent rewarming process, trace stress is generated on the vacancy surface of the material, and this trace stress can reduce the damage to the inside of the material, which is finally manifested as the improvement of the mechanical properties of the material.

The application relates to the field of metal materials, and discloses a steel for small-size steel balls for mine grinding and a preparation method of the small-size steel balls. The steel for the steel balls comprises the following components: C: 0.4%-0.9%, Mn: 3.0%-5.0%, Si: 1.4%-1.8%, Cr: 0.8%-1.3%, Ni: 0.3%-0.6%, Mo: 0.2%-0.4%, V: 0.15%-0.25%, Nb: 0.02%-0.06%, the rest is Fe and inevitable impurities, and the contents of Mn, V and Nb need to be controlled in coordination. The small-size steel balls are forged and hot-rolled, and are subjected to non-heat-insulation grading quenching and deep cryogenic treatment. The steel ball components and the preparation process realize low-temperature martensite transformation, obtain fine and uniform martensite structure, and the steel ball has high hardness, high impact toughness and excellent impact fatigue resistance.

This application discloses a thickened steel pipe sleeve, its heat treatment method, and its application, belonging to the field of metallic materials technology. The method includes: subjecting the thickened sleeve forming part to a first-heated sleeve by quenching at a temperature of 880-900℃; subjecting the first-heated sleeve to a first-water quenching to obtain a first-water-quenched sleeve; subjecting the first-water-quenched sleeve to a second-heated quenching at a temperature of 920-940℃; subjecting the second-water-quenched sleeve to a second-water quenching to obtain a second-water-quenched sleeve; cooling the primary and secondary sleeve bodies with external spraying and internal spraying, and cooling the thickened end with external spraying, internal spraying, and supplementary water; the external spraying flow rate is 2800-3200 m³ / h; the internal spraying flow rate is 1000-1500 m³ / h; and the supplementary water flow rate is 400-600 m³ / h. 3 / h; The secondary heating and tempering treatment of the sleeve yields a thickened steel pipe sleeve. The yield strength and tensile strength deviation of the tube body and the thickened end of the thickened sleeve after heat treatment in this application are ≤30MPa.

The invention discloses a corrosion-resistant maritime work steel plate and a production method thereof. The production method comprises the following steps: steelmaking: molten steel comprises 0.05-0.10% of C, 0.2-0.5% of Si, 0.2-0.5% of Mn, 0.05-0.10% of P, less than or equal to 0.005% of S, 0.2-0.5% of Cr, 0.02-0.05% of Ni, 0.2-0.5% of Cu, 0.02-0.05% of Al, 0.02-0.05% of Ti, less than or equal to 0.005% of N, less than or equal to 1.0% of Cr + Cu + P + Al, more than or equal to 0.05% and less than or equal to 0.08% of Ni + Ti, less than or equal to 0.19% of Pcm and less than or equal to 0.31% of Ceq; continuous casting; heating is conducted, the in-furnace time is longer than or equal to 220 min, and the hearth temperature of each heating section in the furnace is controlled; in two-stage rolling, the thickness T of an intermediate billet is 4-5t, and t is the thickness of the steel plate; cooling is controlled, and the cooling speed is not less than 25 DEG C / s.