66results about How to "Avoid anisotropy" patented technology

The invention discloses Cr bearing high strength pipeline steel hot rolling plate and producing method. Its components weight percentages are 0.30-0.60% Cr, 0.40-0.80% C, 0.10-0.35% Si, 1.80-2.20% Mn, 0.005-0.020% P, not more than 0.003% S, 0.04-0.10% Nb, 0.008-0.030% Ti, 0.15-0.60% Ni, 0.15-0.45% Mo, 0.15-0.30% Cu, the rest Fe and unavoidable impurity, contains 73-87% lower bainite, and the rest island martensite. The producing method includes the following steps: heating up to 1160-1220 degree centigrade; rough rolling at 1010-1150 degree centigrade; finish rolling at 830-950 degree centigrade; water cooling; final cooling at 300-450 degree centigrade; controlling cooling speed at 15-30 degree centigrade per second. The invention can gain the LB main complex phase organization which can make the pipeline steel hot rolling plate yield strength reach 690-825MPa, tensile strength reach 780-960MPa, -20 degree centigrade absorbed-in-fracture energy be not less than 200J, -15 degree centigrade DWTT shearing area be not less than 85%, solve steel anisotropy caused by two phase field rolling, release the demand of large rolling load for the two phase field rolling.

The invention discloses an integrated forging and forming method for a reactor pressure vessel barrel flange adapter tube section. The integrated forging and forming method for the reactor pressure vessel barrel flange adapter tube section comprises the steps of (1) heating a steel ingot, and pressing the steel ingot to obtain an eight-edge prism steel billet; (2) blanking a forging billet: cutting a head part and a tail part of the eight-edge prism steel billet so as to obtain an eight-edge prism forging billet; (3) upsetting and drawing the forging billet: upsetting and drawing out the forging billet; (4) carrying out upsetting and rolling: upsetting and rolling the forging billet to obtain a short cylindrical forging billet; (5) carrying out marking and dividing in the circumferential direction: cutting two marking and dividing grooves at two ends of the short cylindrical forging billet; (6) carrying out rolling and necking: forming an adapter tube billet with a convex ring in the middle section; (7) carrying out marking and dividing in the axial direction: cutting four axial dividing grooves arranged along the axial direction; (8) circularly pressing a hemline; (9) marking anddividing a hemline boss: forming four sections of bosses on a hemline adapter tube billet; (10) punching a main hole; (11) carrying out chambering and forming; (12) carrying out shaping and chambering; (13) punching an adapter tube hole; (14) carrying out heat treatment after forging; (15) roughly machining the billet; (16) carrying out quenching; (17) carrying out hardening and tempering; and (18) processing a finished product. According to the method, integrated forming and forming is realized, the structure is uniform and dense, and a metal flow line is complete.

The invention relates to a three-dimensional braided carbon fiber reinforced metal-matrix composite and a preparation method of the three-dimensional braided carbon fiber reinforced metal-matrix composite. The preparation method comprises the following steps that firstly, pre-treatment is conducted on carbon fiber; secondly, carbon fiber bundles and fine metal wires are bound, so that metal wire-carbon fiber composite bodies are obtained, a three-dimensional framework reinforcing body is braided from the metal wire-carbon fiber composite bodies; thirdly, the braided three-dimensional fiber framework reinforcing body are soaked with silicon carbide particle dissolving slurry and potassium fluozirconate water solution; fourthly, the three-dimension fiber framework reinforcing body treated inthe third step is placed in matrix metal liquid and undergoes extrusion forming under ultrasonic vibration, and then the novel metal-matrix composite is obtained. According to the three-dimensional braided carbon fiber reinforced metal-matrix composite and the preparation method of the three-dimensional braided carbon fiber reinforced metal-matrix composite, a three-dimensional fiber framework isbraided from carbon fiber, net-shape manufacturing of the novel metal-matrix composite reinforced by the three-dimensional fiber framework reinforcing body and having excellent performance is achieved, the types and application range of the metal-matrix composite are expanded, and the three-dimensional braided carbon fiber reinforced metal-matrix composite certainly has broad application prospectin the aerospace field, the military project field and the civil field.

The invention relates to a boron nitride based ceramic material as well as a preparation method and application thereof. The boron nitride based ceramic material is prepared from boron nitride, electric-melting zirconium oxide, silicon carbide and an additive. The method comprises the following steps: 1, weighing raw materials; 2, preparing composite powder; 3, preparing boron nitride composite powder; 4, preparing a boron nitride based ceramic material prefabricated blank; 5, preparing the boron nitride based ceramic material. The invention further relates to the application of the boron nitride based ceramic material serving as a boron nitride based ceramic side sealing plate material for thin strip continuous casting. By adopting the boron nitride based ceramic material provided by theinvention, the technical problem that a boron nitride based complex phase ceramic material has high sintering temperature and a sintering auxiliary agent has a low melting point so that the service performance is reduced is solved; the density of the prepared boron nitride based ceramic material can reach 97 percent or more; the boron nitride based ceramic material has excellent integrated mechanical properties and the bending strength value can reach 420MPa, so that the boron nitride based ceramic material is very suitable for being used as the boron nitride based ceramic side sealing plate material for the thin strip continuous casting.

The invention discloses a calcium phosphate-collagen nanometer fiber compound nanometer artificial bone and a preparation method thereof. A calcium phosphate nanometer fiber film serves as a nanometer structural unit and combines with collagen to form the compound nanometer artificial bone; or a collagen nanometer fiber film serves the nanometer structural unit and combines with the calcium phosphate to form the compound nanometer artificial bone. The preparation method comprises the steps of preparing the calcium phosphate nanometer fiber film and collagen nanometer fiber film by using a static spinning device; and alternatively combining with collagen or calcium phosphate after taking the calcium phosphate nanometer fiber film or collagen nanometer fiber film as the nanometer structural unit to form the calcium phosphate-collagen nanometer fiber compound nanometer artificial bone. The compound nanometer artificial bone disclosed by the invention at least comprises one nanometer fiber in calcium phosphate or collagen, has biologic activity, biological compatibility and biomechanic intensity and can be used for repairing defects parts of weight bearing bones, including skulls, limb-stem bones, orofacial bones, vertebral columns and the like and serving as gradient materials to repair the connection parts of cartilages and bones.

The invention discloses a high-toughness wear-resistant flux-cored wire which consists of a flux core and stainless steel skin covering the flux core. The flux core comprises the following raw materials: graphite powder, silicon powder, magnesium powder, nickel powder, titanium powder, titanium dioxide powder, titanium boride powder, iron oxide powder, zirconium oxide powder, aluminum-strontium alloy powder, electrolytic manganese powder, ferromolybdenum powder, ferroniobium powder, ferrovanadium powder, rare earth ferroalloy powder, carbonate, metal fluoride, and the balance reduced iron powder and unavoidable impurities. The high-toughness wear-resistant flux-cored wire has the advantages that splashes are small, smoke is little, the forming is good, deslagging is easy, deposited metal is compact in structure, no pores or flaws appear, the high-toughness wear-resistant flux-cored wire is combined with parent metal well and is stable in performance, the deposited metal has good wear resistance, corrosion resistance and high toughness, and the high-toughness wear-resistant flux-cored wire has good economic benefits.

The invention discloses an underground water level monitoring device suitable for various aquifer conditions, which comprises a spherical shell, 14 symmetrically distributed monitoring sensors are arranged on the spherical surface of the spherical shell, a gyroscope is arranged at the sphere center position of the spherical shell, a data processing module is arranged on one side of the bottom in the spherical shell, and a data processing module is arranged on the other side of the spherical shell. A signal output interface is arranged on one side of the top in the spherical shell, and a plurality of supports are arranged between the outer surface of the gyroscope and the inner surface of the spherical shell. By adopting the sphere structure, the influence of the water flow effect can be reduced, and the measurement value of each monitoring sensor can be ensured to have typicality, so that the underground water level measurement precision is greatly improved; by means of the built-in monitoring sensor and the gyroscope, water flow information such as pressure and flow velocity can be adopted in real time, high-precision pressure and flow velocity measurement and calculation are achieved in combination with a space coordinate system constructed by the data processing module, and therefore the problems that underground water level measurement is high in difficulty and low in precision and efficiency are effectively solved.

The invention discloses a carbon fiber engine cover for an automobile. The carbon fiber engine cover comprises an engine cover body. The upper and lower portions inside the engine cover body are provided with a thermal insulating layer and a waterproof layer respectively, a carbon fiber layer is arranged in the center inside the engine cover body, the engine cover body comprises an outer installing plate, a sound insulating plate and an inner installing plate, the outer installing plate and the inner installing plate are arranged at the front and rear ends of the engine cover body respectively, the sound insulating plate is arranged between the outer installing plate and the inner installing plate, lightening holes are formed in the two sides of the front surfaces of the outer installing plate and the inner installing plate at equal intervals, electronic refrigeration pieces are electrically connected to the middle of the surface of the inner installing plate, and the bottoms of the two sides of the surface of the outer installing plate are fixedly connected with fans through formed installing grooves. By arranging the carbon fiber layer, the sound insulating plate, the waterprooflayer, the fans, a wind direction flow guiding groove, the electronic refrigeration pieces and the lightening holes, the carbon fiber engine cover has the advantages of prolonging the service life andachieving sound insulation, waterproofness, exhaust, heat dissipation and low weight.