9results about How to "Small tissue" patented technology

The invention aims to provide the high-strength and high-toughness seamless tube for the automobile safety bag and the preparation method of the high-strength and high-toughness seamless tube, and the purpose that the steel tube has high strength, high plasticity and toughness and excellent low-temperature blasting resistance is achieved. The steel for the seamless tube for the automobile safety bag comprises the following chemical components in percentage by weight: 0.02-0.04% of C; 0.2 to 0.4 percent of Si; mn: 1.5 to 1.7%; s < = 0.005%; p is less than or equal to 0.01%; 0.04% to 0.06% of Nb; 0.02 to 0.04 percent of V; 0.01 to 0.02 percent of Ti; 0.7%-1.0% of Cu; n < = 0.002%; o < = 0.002%; al is less than or equal to 0.03%; and the balance of Fe and inevitable impurities. The steel pipe is made of microalloyed steel and has the advantages of being high in strength, good in plasticity and toughness, excellent in blasting resistance, good in cold machining performance and low in cost. The optimization of the steel pipe for the automobile safety bag from material selection to a specific cold drawing process is achieved, and the yield strength of the steel pipe is larger than 860 MPa, the tensile strength is larger than 1000 MPa, and the ductility is larger than 25%; and according to the GB / T241-2007 standard, the steel pipe is placed at the temperature of minus 40 DEG C for 24 hours and then subjected to a blasting experiment, and the pressure of the blasting steel pipe is larger than or equal to 130 MPa.

The invention discloses Ag-free high-temperature active alloy brazing filler metal and a preparation method and application thereof. The brazing filler metal alloy comprises 9.5-12.5 wt% of Ge, 9-11 wt% of Ti, 0.1-1.5 wt% of Ni and the balance Cu, the melting point of the brazing filler metal alloy ranges from 960 DEG C to 975 DEG C, and the recommended brazing temperature ranges from 1000 DEG C to 1100 DEG C. The product forms comprise foil strips, wires and powder paste. The preparation method comprises the steps of vacuum alloying, spherical gas atomization powder preparation, centrifugal ball milling powder mixing, spark plasma sintering, homogenizing heat treatment, isothermal rolling, isothermal rotary swaging and precise drawing. The alloy brazing filler metal is suitable for ceramic high-temperature direct packaging, diamond material device high-temperature brazing, refractory metal vacuum brazing and the like, high-strength weld joints can be obtained, the service temperature is high, the cost is low, and the problem that Ag element steam pollutes devices can be effectively solved.

The invention relates to a material laser forming technology, in particular to an AlCoCrFeNi2.1 composite material coating and a preparation method thereof. The composite material coating comprises Al particles, Co particles, Cr particles, Fe particles, Ni particles and Ni3Al particles, and the molecular formula of the composite material coating is AlCoCrFeNi2.1-xNi3Al; wherein 0 lt; and x is less than or equal to 10wt%. According to the preparation method, Ni3Al powder and AlCoCrFeNi2.1 powder are proportioned according to the proportion and mechanically mixed to prepare Ni3Al particle reinforced AlCoCrFeNi2.1 composite material powder, a single-layer Ni3Al particle reinforced AlCoCrFeNi2.1 composite material coating is prepared through a laser cladding technology, the organizational structure of the Ni3Al particle reinforced AlCoCrFeNi2.1 composite material is regulated and controlled, and the hardness and wear resistance of the obtained composite material are improved.

The invention provides a preparation method of an iron-based coating, which comprises the following steps: S1) respectively arranging a laser head and an induction coil on two sides of a sample to be processed, spraying iron-based alloy powder from the laser head, and starting laser cladding from one side of the sample to be processed by the laser head; s2) after the laser head advances 4-6 cm on the surface of the to-be-processed sample, starting the induction coil until the end; and S3) tempering the sample obtained in the step S2). The invention further provides a preparation device of the iron-based coating. According to the preparation method of the iron-based coating, preparation of the iron-based coating is achieved through combination of laser cladding and induction cladding, the problems that the coating is prone to cracking and poor in compactness due to independent laser cladding are solved, generation of defects such as pores and cracks of the coating can be greatly reduced, and the wear resistance and corrosion resistance of the iron-based coating are improved.

The application discloses a kind of high-performance magnesium-lithium alloy materials, the high-performance magnesium-lithium alloy material is obtained by being compacted by magnesium-lithium alloy powder into mould, then sintering densification is carried out, in addition, the application also provides a kind of preparation method of high-performance magnesium-lithium alloy material, comprising the following steps: one, Mg-8Li-9Al-1Zn alloy powder is weighed and loaded into mould;Two, the powder in the powder loaded mould is compacted;Three, the mould with compacted powder is sintered densification in vacuum, and high-performance magnesium-lithium alloy material is obtained in mould.The high-performance magnesium-lithium alloy material of the application uses Mg-8Li-9Al-1Zn alloy powder as raw material, is compacted by being loaded into mould, then sintering densification is carried out, process flow is short, cost is low, operation is simple, flexible, the obtained high-performance magnesium-lithium alloy material component is uniform, organization is small, and the organization, structure of material can be designed, easily controlled, and the compressive strength is greater than 500MPa.

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.

The present application belongs to the field of TiAl intermetallic compound, and relates to a TiAl alloy composition and a preparation method of high-performance TiAl alloy low-pressure turbine blade. Based on a TiAl alloy composition, the alloy is first made to have fine grain structure through reasonable extrusion + recrystallization annealing process, then the special molybdenum alloy die and the process method of vacuum isothermal die forging are adopted, so that the brittle material realizes the forming of blade structure at high temperature and low speed, and the technical bottleneck problems such as large blade machining allowance, serious material waste, uneven blade structure, unstable mechanical properties of parts and the like caused by the need of machining preform of TiAl alloy at high temperature and preheating at low temperature during the near isothermal forming in the conventional preparation method are solved, and the blade quality is significantly improved and the manufacturing cost is saved. The machining allowance of the TiAl blade die forging part of the present application is only 2mm, and the raw material consumption can be saved by about 30%.

The invention relates to a casting method for refining an alloy phase in a hypereutectic aluminum alloy, and relates to the technical field of cast aluminum alloys, and the casting method comprises the following steps: preparing the hypereutectic aluminum alloy which comprises the following components in percentage by mass: 18.5-19% of silicon, 4.6-5.2% of copper, 0.35-0.45% of magnesium, 4.24-4.28% of nickel, 0.01-0.05% of phosphorus and the balance of aluminum and inevitable impurities; smelting is conducted according to the nominal components, and molten aluminum alloy liquid is obtained; a grain refiner is added into the molten aluminum alloy liquid, heating and stirring are conducted, ultrasonic treatment is conducted, and the treated aluminum alloy liquid is obtained; a refining agent and a refining solution are added into the treated aluminum alloy liquid, cooling is carried out, stirring and ultrasonic treatment are carried out while adding is carried out, argon is introduced to remove impurities, and the refined aluminum alloy liquid is obtained; and scooping out oxide skin on the surface of the refined alloy liquid, and pouring to obtain the hypereutectic aluminum alloy. The hypereutectic aluminum alloy has the effect of refining the alloy phase in the hypereutectic aluminum alloy, and the mechanical property and the thermal property of the hypereutectic aluminum alloy can be effectively improved.

The present application belongs to the technical field of continuous preparation of porous metal materials, and relates to a method for preparing porous iron by rapid solidification of iron-zinc alloy + continuous annealing and dezincification, wherein iron and zinc are smelted under a protective atmosphere to obtain Fe-Zn alloy melt; the obtained Fe-Zn alloy melt is rapidly solidified by single-roller spin-chilling to form Fe-Zn alloy ribbons; the Fe-Zn alloy ribbons are subjected to continuous annealing treatment under a protective atmosphere, so that zinc is removed in the form of gas phase, and porous iron ribbons are obtained; and the porous iron ribbons are cooled and wound to obtain continuous porous iron ribbons. The present application realizes the continuous and large-scale production of porous iron ribbons, and the dezincification process is a pure physical gas phase removal process, without generation of acid and alkali waste liquid, and is green and environmentally friendly.