152 results about "Thermo mechanical" patented technology

An apparatus includes a structure configured to receive thermal energy and to reject the thermal energy into an external environment. The structure includes a lid and a body. The structure also includes (i) multiple inline and interconnected thermomechanical regions and (ii) one or more oscillating heat pipes embedded in at least some of the thermomechanical regions. Different portions of at least one of the lid and the body form the thermomechanical regions. The one or more oscillating heat pipes are configured to transfer the thermal energy between different ones of the thermomechanical regions. At least one of the thermomechanical regions includes one or more shape-memory materials configured to cause a shape of the structure to change. Each of the one or more oscillating heat pipes includes at least one channel in the structure.

The invention belongs to the technical field of aero-engine high-temperature part test, and particularly relates to a thermal mechanical composite fatigue test device in a turbine blade rotation environment, which comprises a high-temperature gas system, a stator system, a rotor system, a support system, a test system, an auxiliary system and a turbine rotor blade test piece, the high-temperature fuel gas system is used for providing a fuel gas environment for a turbine rotor blade test piece and controlling the high-low temperature circulation state of fuel gas, a combustion chamber is arranged at the front end of the high-temperature fuel gas system and provided with a double-oil-way nozzle, a fuel gas flowing system is arranged at the rear end of the high-temperature fuel gas system, and a blade grid structure is designed for the fuel gas flowing system according to the geometrical shape of a turbine rotor blade. And a spray cooling section is arranged at the rear part of the test section. The device is composed of six core systems including a high-temperature fuel gas system, a stator system, a rotor system, a supporting system, a testing system and an auxiliary system, all the systems work cooperatively, and integrated simulation of the high-temperature fuel gas environment, rotating centrifugal loads and heat-force synchronous circulation is achieved.

The invention provides a manufacturing method of a glass substrate with a conductive through hole and a chip packaging structure, and the method comprises the steps: providing a glass substrate which comprises a first surface and a second surface which are opposite to each other; forming a first through hole through which the first surface of the glass substrate penetrates to the second surface; forming a conductive column in the first through hole, wherein a gap is formed between the conductive column and the first through hole; and forming a buffer layer between the conductive column and the inner wall of the first through hole, wherein the buffer layer at least covers the inner wall of the first through hole and the side wall of the conductive column. According to the invention, through the method of firstly manufacturing the conductive column and then forming the buffer layer, the step of directly depositing a high-quality insulating film in the first through hole with relatively high difficulty and cost is avoided, the demand on deposition equipment is reduced, the material and time cost is saved, and the production yield is improved. Meanwhile, the buffer layer is actively filled between the conductive column and the glass substrate, so that the thermal mechanical stress is more effectively absorbed and released, and the product quality of the glass substrate with the conductive through hole is improved.

The invention discloses a high-performance zinc alloy with a gradient structure and a preparation method and application thereof, and belongs to the technical field of metal material processing. The high-performance zinc alloy with the gradient structure is characterized in that the grain sizes of upper, middle and lower areas of the alloy are in fine-coarse-fine distribution, the grain sizes of the upper and lower areas are smaller than or equal to 2 microns, the grain size of the central area is 5-20 microns, and the grain size of a transition area between the upper and lower areas and the central area is 2-15 microns; meanwhile, all the areas are accompanied with MnZn13 nano precipitated phases with the size smaller than or equal to 50 nm. The alloy shows excellent deformation resistance and thermal mechanical stability, the elasticity modulus of the alloy can at least reach 125 GPa, meanwhile, the alloy shows excellent corrosion resistance, and the alloy is particularly suitable for biomedical implantation instruments such as intravascular stents and bone nails.

The invention belongs to the technical field of metal materials, and relates to a CoNiVAlX (x is greater than or equal to 0 and less than or equal to 0.5) multi-principal-element heterostructure entropy alloy system and a preparation method thereof. The chemical composition (atomic percent) of the alloy contains Co, Ni, V, Al and a trace regulator, flexible matching of strength and toughness is realized in a wide temperature range of-263 DEG C to 800 DEG C by regulating the Al content and a thermal mechanical treatment process, and various mechanical states such as'high ductility-medium strength 'and'high strength-medium ductility' can be obtained; the preparation process is based on a mature metallurgical technology and does not depend on special equipment, and large-size stable preparation can be achieved. Tests prove that the alloy system is wide in toughness and adjustable, the toughness balance in a wide temperature range is realized, the application requirements in an extreme environment are met, and the alloy system has a good industrial popularization prospect.

The invention discloses a preparation process of a high-strength corrosion-resistant stainless steel fastener. The preparation process comprises the steps of material modification, warm upsetting forming, stabilizing treatment, cryogenic strengthening, gradient aging, surface treatment, post-treatment and the like. According to the process, the alloy component proportion is optimized, a thermal mechanical treatment technology of warm upsetting forming, subzero treatment and gradient aging is combined, a nano-composite coating and micro-arc oxidation sealing process is innovatively introduced, and the process comprises vacuum melting and controlled rolling of customized high-nitrogen stainless steel wires, deformation-induced martensite regulation in warm upsetting forming, low-temperature hot rolling, high-temperature hot rolling, high-temperature hot rolling, high-temperature hot rolling, high-temperature hot rolling and high-temperature hot rolling. The tensile strength and the salt spray corrosion resistance of the fastener are remarkably improved through deep cooling-medium temperature aging synergistic strengthening, double-layer nano TiN / CrN composite coating deposition and micro-arc oxidation micropore sealing treatment, the problem that a traditional stainless steel fastener is insufficient in strength and low in stress corrosion sensitivity is solved through the technology, and the technology is particularly suitable for the extreme environments such as aerospace and ocean engineering.

A method for optimizing process parameters of friction stir welding with synchronous rolling and a related device are provided. A heat source model is applied to a system finite element model, and heat transfer simulation is performed on the welding and cooling processes of friction stir welding. Furthermore, contact relationships and mechanical action relationships between a stirring tool finite element model and a weldment finite element model and between a roller finite element model and the weldment finite element model are applied in the system finite element model. Thermal-mechanical simulation is performed on the welding process, the cooling process and a clamp release process of friction stir welding with synchronous rolling with a temperature field result obtained from heat transfer simulation as an input. Based on the welding stress and welding deformation results obtained from thermal-mechanical simulation, process parameters are adjusted and re-simulated until optimal parameters are obtained.

The invention relates to the technical field of inductor manufacturing, in particular to a 10kV three-element anti-resonance metering combined mutual inductor which comprises a mutual inductor body, a heat dissipation groove is formed in the bottom of the mutual inductor body, and an isolation box is arranged in the mutual inductor body. The side wall and the top of the isolation box are slidably connected with a first pressed plate and a second pressed plate correspondingly. An isolation plate I, an isolation plate II, a blocking plate I and a blocking plate II are arranged in the box from top to bottom; the limitation of a fixed heat dissipation mode in traditional inductor manufacturing is broken through, and a stress-heat dissipation self-adaptive adjusting mechanism is constructed; stress generated by materials such as epoxy resin, copper materials and silicon steel sheets due to difference of thermal expansion coefficients is sensed through a pressed plate, and different numbers of air inlets and vent holes are opened in an automatic linkage mode; intelligent switching from basic heat dissipation to enhanced fire dissipation is achieved, thermal mechanical stress is absorbed in all directions through a spring buffer system, the long-term reliability problem of internal cracks and insulation deterioration caused by material thermal mismatch in inductor manufacturing is solved, the service life of a product is prolonged, and the operation stability of the product is improved.

The invention belongs to the technical field of alloys, and provides a lightweight refractory multi-principal-element alloy with excellent high-temperature creep property, and a preparation method and application thereof. The general formula of the light refractory multi-principal-element alloy with the excellent high-temperature creep property is TiaVbAlcCrdMoe, wherein 43% < = a < = 48%, 43% < = b < = 48%, 2% < = c < = 8%, 2% < = d < = 8% and 1% < = e < = 5%, a + b + c + d + e = 100%, and a, b, c, d and e are mole percentages. The alloy presents an isometric crystal structure in a complete recrystallization state in a thermal mechanical treatment state, the phase structure is a single-phase body-centered cubic BCC structure, the alloy has low density and shows excellent creep property at 650 DEG C / 100 MPa, the creep time exceeds 90 h, and the creep elongation is lower than 10%.

The invention discloses a ceramic guide rail for an ultra-precision machining and ultra-precision measuring instrument and a preparation method of the ceramic guide rail in the field of ceramic materials. The ceramic guide rail comprises the following raw materials: 40-58% of nano alpha-Al2O3; 10 to 15% of titanium carbide; 5-8% of boron nitride; 5% to 10% of a Y2O3-MgO compound; 3-5% of zirconium oxide; 1 to 2 percent of La2O3; 0.5 to 1.5 percent of graphene; and 2 to 5% of nano CeO2 coated Al2O3 core-shell particles. The ceramic guide rail disclosed by the invention has excellent wear resistance, dimensional stability and thermal mechanical property, and is particularly suitable for guiding parts of ultra-precision machining equipment and measuring instruments.

The invention relates to the technical field of cable materials, discloses a crosslinked polyethylene insulated power cable and a preparation method thereof, and aims to solve the problems that harmful by-products are introduced and complicated degassing is needed in the conventional chemical crosslinking material. According to the material, a hierarchical dual-network structure composed of a physical cross-linked network and a dynamic covalent cross-linked network is constructed through components such as matrix resin, a dynamic network functional monomer and a physical network functional nanofiller. The preparation method comprises the following steps: preparing a hierarchical network precursor by reactive grafting in a twin-screw extruder, and devolatilizing; in the cable extrusion process, network in-situ curing is achieved through cooling, and traditional high-temperature crosslinking and degassing steps are omitted. According to the scheme, crosslinking by-products are fundamentally avoided, it is ensured that the material has excellent electrical properties, thermal mechanical properties and long-term reliability, the preparation process is remarkably simplified, and meanwhile the material has the thermally induced self-repairing potential.

The invention provides a Mn-Fe-Ni-Si-Cu-based negative thermal expansion material as well as a preparation method and application thereof, and belongs to the technical field of negative thermal expansion materials. The negative thermal expansion temperature range of the Mn-Fe-Ni-Si-Cu-based negative thermal expansion material provided by the invention covers the high-temperature and low-temperature ranges (120K-896K), and the high-temperature and wide-temperature-range negative thermal expansion effect is shown; good mechanical properties are achieved; the material has extremely high thermal and mechanical stability, and has important significance for developing high-temperature precision mechanical devices based on zero expansion. The Mn-Fe-Ni-Si-Cu-based negative thermal expansion material disclosed by the invention is low in raw material cost and simple in preparation method.

An aluminium alloy sheet includes an aluminium alloy, wherein the aluminium alloy includes: 0.15 wt. % to 0.25 wt. % of Si, 0.80 wt. % to 1.00 wt. % of Fe, 0.08 wt. % to 0.12 wt. % of Cu, 0.55 wt. % to 0.70 wt. % of Mn, 0.30 wt. % to 0.40 wt. % of Mg, equal to or less than 0.05 wt. % of each other element, and aluminium as balance. A thermomechanical method for producing such aluminium alloy sheet includes an specific scheme of heating and rolling stages; and the use of such aluminium alloy sheet for manufacturing an aluminium closure, preferably an aluminium cap, for bottles, cans or other similar containers.

The invention relates to the technical field of a plasma spraying process of a high-corrosion-resistance yttrium oxide coating and a gradient structure design method, and particularly discloses the plasma spraying process of the high-corrosion-resistance yttrium oxide coating and the gradient structure design method. The invention aims to solve the problems that a traditional plasma spraying yttrium oxide coating is high in porosity, non-uniform in microstructure, easy to crack and peel off due to mismatch of a thermal expansion coefficient and a metal matrix, and difficult to consider compactness, stress buffering and long-term stability at the same time. The method comprises the following steps: carrying out degreasing cleaning, sand blasting coarsening, ultrasonic oscillation and drying pretreatment on a substrate, carrying out high-corrosion-resistance yttrium oxide composite powder spraying by adopting plasma spraying parameters optimized by an orthogonal test, and arranging multiple layers of intermediate layers with components and thermal expansion coefficients in gradient transition between the substrate and a coating, follow-up heat treatment and nano sol hole sealing treatment are assisted. By adopting the technical scheme, low porosity, high bonding strength, excellent thermal mechanical stability and long-term corrosion resistance in a strong corrosion environment of the coating can be realized.

The invention discloses steel for a hydrogen transmission pipeline and a production method of the steel, and belongs to the technical field of ferrous metallurgy, the steel comprises the following chemical components in percentage by mass: 0.03%-0.05% of C, 0.15%-0.35% of Si, 0.7%-1.30% of Mn, less than or equal to 0.015% of P, less than or equal to 0.0010% of S, 0.010%-0.030% of Nb, 0.035%-0.055% of V, 0.008%-0.030% of Ti, 0.15%-0.35% of Cr, 0.30%-0.50% of Ni, 0.050%-0.150% of Mo, 0.10%-0.20% of Cu, 0.010%-0.050% of Al, less than or equal to 0.00050% of B, less than or equal to 0.0060% of N, less than or equal to 0.0002% of According to the production method, high-purity low-carbon phosphorus-sulfur molten steel is obtained through a converter, refining and continuous casting, alloy steel mainly comprising acicular ferrite is obtained through a hot mechanical rolling technology, and the hydrogen conveying requirement of products is met.

The invention discloses a high-conductivity high-strength copper alloy thermal mechanical treatment strengthening process which comprises the following steps: firstly, heating a Cu-Ni-Be-Zr alloy cast ingot to 890-980 DEG C until the core part of the cast ingot reaches a set heating temperature, then compressing the cast ingot, carrying out water cooling at room temperature, and finally carrying out aging treatment and air cooling on the cast ingot at 480 DEG C * 3-480 DEG C * 8 hours; the Cu-Ni-Be-Zr alloy comprises the following components in percentage by weight: 1.6 to 2.5 percent of Ni, 0.25 to 0.5 percent of Be, 0.05 to 0.2 percent of Zr, not more than 0.1 percent of impurities and the balance of Cu. According to the method, the cast ingot of the Cu-Ni-Be-Zr alloy is directly subjected to thermal mechanical treatment and then subjected to aging, the process steps of forging, solid solution treatment and cold deformation in a traditional process are omitted, the performance of the treated Cu-Ni-Be-Zr alloy is basically consistent with that of the alloy obtained after the traditional production process is adopted, and therefore the Cu-Ni-Be-Zr alloy is obtained. The thermomechanical treatment combines the advantages of hot working and mechanical deformation, and the microstructure and performance of the alloy can be more efficiently improved.

The invention relates to an assembly (1) of cryogenic equipment (10, 20), said assembly (1) comprising: - a first cryogenic equipment (10) and a second cryogenic equipment (20) whose connection means (10B, 20B) are made of a first material, - a piping routing (30) fluidically connecting the first cryogenic equipment (10) and the second cryogenic equipment (10), - a main support (40) made of a second material with different thermomechanical properties to those of the first material, - an intermediate support (50) made of a material with thermomechanical characteristics similar to those of the first material, the first cryogenic equipment (10) and the second cryogenic equipment (20) comprising support means (10A, 20A), preferentially made of said first material, each support means (10A, 20A) being attached to the main support (40) and to the intermediate support (50), each support means (10A, 20A) being attached to said main support (40) with one degree of freedom.

The invention discloses a packaging structure and a forming method thereof. The packaging structure comprises a first rewiring structure, a second rewiring structure and a third rewiring structure, wherein the first rewiring structure comprises a dielectric layer and functional wires located in the dielectric layer; the functional chip is arranged on the first surface, and the functional chip is electrically connected with the first rewiring structure; and the stress control structure is located in the dielectric layer at the bottom of the functional chip, and the stress control structure is electrically isolated from the functional wires. The stress control structure can counteract the warping stress caused by the difference of the coefficient of thermal expansion (CTE) of materials, the warping degree of the packaging structure is reduced, and the introduction of the stress control structure enhances the overall mechanical strength of packaging, so that the cracking and layering risks caused by the thermal mechanical stress are reduced.

The application discloses a 1000MPa-grade extra-thick hydroelectric steel with low strain aging sensitivity, and chemical components and mass percentages of the steel include the following: C: 0.05%-0.13%, Si: 0.15%-0.35%, Mn: 0.8%-1.2%, Ni: 1.8%-2.2%, Cr: 0.3%-0.6%, Mo: 0.3%-0.6%, V: 0.03%-0.07%, Ti: 0.01%-0.03%, Nb: 0.02%-0.05%, Alt: 0.02-0.05%, S≤0.002%, P≤0.008%, N≤0.008%, and the rest is Fe and inevitable impurity elements. The application has the advantages that the steel plate can still maintain extremely low strain aging sensitivity after cold working deformation, and a stable dislocation network and nanometer precipitated phase are introduced by using a specific thermal mechanical treatment process.

The invention relates to the technical field of pressure-sensitive materials, in particular to a wide-range high-response pressure-sensitive material composite structure and a process optimization method. Comprising the following steps: immersing polymer particles into a conductive composite coating solution, mechanically stirring, ultrasonically dispersing, drying and curing to prepare particles with uniformly coated surfaces; the method comprises the following steps: melting particles by adopting a micro-fluidic spinning technology, extruding special-shaped cross-section fibers through a spinneret plate, stretching and shaping, and constructing a surface bulge structure. A plurality of fibers are twisted and stranded, the twisting direction is regulated and controlled to form a stable conductive net, and the periodic wavy linear single-strand pressure-sensitive wire is prepared through thermal mechanical shaping. The pressure-sensitive lines are subjected to warp and weft orthogonal weaving, butt-joint points are locally hot-pressed and fixed to form a latticed synaptic array and groove network, and the tip end is an arc-shaped micro-strain trigger area; and assembling a multi-layer functional fabric stacking structure, preparing an electrode layer, a pressure-sensitive layer and a packaging layer, and sequentially stacking the electrode layer, the pressure-sensitive layer and the packaging layer. According to the technical scheme, the range and response of the sensor in the tower can be improved.

The invention discloses an aluminum oxide waterproof heat-insulating coating as well as a preparation method and application thereof, relates to the technical field of coating materials, and solves the problem that an existing protective coating material cannot meet the requirements of a high-precision chip on interface bonding strength and thermal mechanical stability of a densified coating. The coating comprises loose and porous aluminum oxide slurry A and relatively dense aluminum oxide slurry B, the aluminum oxide slurry A is printed on the surface of the chip blank through the printing process and dried, and the aluminum oxide slurry A is a first layer sintered at high temperature; printing the aluminum oxide slurry B on the surface of the chip blank with the aluminum oxide coating A, and drying, wherein the aluminum oxide slurry B is a second layer of low-temperature sintering; the method can be applied to protection of the zirconia ceramic chip in the nitrogen-oxygen sensor, and has a wide application prospect.

The invention provides an Al-Co-Cr-Fe-Ni low-expansion high-entropy alloy capable of being subjected to thermal mechanical treatment and a preparation method and application thereof, the general formula of the Al-Co-Cr-Fe-Ni low-expansion high-entropy alloy capable of being subjected to thermal mechanical treatment is AlxCry (Fe65Co4Ni31) 100-x-y, x is larger than or equal to 0.5% and smaller than or equal to 3%, y is larger than or equal to 0.5% and smaller than or equal to 3%, and x and y correspond to the mole percent of elements respectively. The Al-Co-Cr-Fe-Ni low-expansion high-entropy alloy capable of being subjected to thermal mechanical treatment has low thermal expansion performance, the thermal expansion coefficient is lower than 1.1 * 10 <-6 > / DEG C, meanwhile, the alloy has good comprehensive mechanical performance, the room-temperature tensile strength reaches up to 460 MPa, the plastic deformation can reach 30%, and the alloy has good application prospects and large-scale popularization potential in the field of precise instruments.

The present application discloses a method and system for producing non-standard precision parts, which includes: collecting key data in the processing process, wherein the key data includes temperature, pressure, speed and vibration data; establishing a digital twin model, and inputting the key data into the digital twin model to simulate the actual processing process in real time; in the simulation of the actual processing process, analyzing the thermomechanical behavior of the material in the processing process, and optimizing the material processing technology and processing parameters based on the analysis results; based on the optimization results, realizing the production of non-standard precision parts.

The invention relates to the field of oil and gas production, and more particularly to the production of protective anti-corrosive coatings suitable for use in aggressive downhole oil and gas production conditions exacerbated by corrosion factors, including the deposition of salts and paraffins. The coatings are provided to protect the inner surfaces of oil tubular goods; including tanks and reservoirs for storing oil, oil-containing fluids, water and other solutions and fluids. Another goal of the invented coating is to protect pipes against corrosion during the transportation of oil, water, chemical solutions and other fluids, as well as to be used as a repair composition for the ends, outside and inside chamfers and the first two non-working turns of the threaded portion of production tubing. The invention results in improved performance characteristics and permits the production of an anti-corrosive coating that better preserves the physical, mechanical and thermomechanical properties of a material after exposure to aggressive corrosive media under pressure and at an elevated temperature.

A kind of thermomechanical method for regulating precipitated size of silicide in silicon-containing titanium-based composite material, it relates to the field of titanium-based composite material, the method of the present application is to place sintered discontinuous reinforced silicon-containing titanium-based composite material after cutting and polishing in thermomechanical machine, so that the material is uniformly distributed along the temperature distribution in the deformation direction;Thermomechanical treatment is carried out under the condition that the temperature is 600-800 DEG C and the pressure is 100-300 MPa, stop thermomechanical treatment after reaching the specified deformation, unload and air cooling, that is, complete.The present application realizes the accurate regulation of the precipitated size of silicide in titanium-based composite material by adjusting the two parameters of temperature and stress in thermomechanical treatment process simultaneously, and widens the custom interval of the precipitated size of silicide.The present application is applied to the field of in-situ autogenous titanium-based composite material organization design and regulation technology.

The application discloses a kind of multi-station coordinated stator wire harness hot sleeve assembly method and system, it is related to motor component assembly technical field;Construction station twin model, AGV distributes material with RFID label according to tempo, PLC dynamic replenishment;After wire stripping and tin, 3D vision guides mechanical arm and inserts wire according to slot, force control adjusts insertion angle;Double-shaft platform adjusts stator and heating coil coaxial alignment, infrared sensor aims sleeve;PLC controls heating power, time, rotates stator to ensure uniform heating, mechanical arm advances sleeve and pressure monitoring;Air cooling-water cooling-natural cooling, temperature feedback adjusts parameter;Insulation, appearance, conduction, tension detection, data binding stator ID upload traceability.The application improves efficiency through digital twin, optimizes hot sleeve parameters to ensure fit quality, graded cooling enhances stability, full-dimension detection and traceability improves controllability, intelligent early warning reduces maintenance cost, adapts to batch production demand.

The application discloses a preparation method of a heat-resistant and radiation-resistant ultra-fine grain martensitic steel and belongs to the field of metal structural materials. 12 The ceramic oxide powder replaces Y2O3 and Ti powder added in preparation of a traditional oxide dispersion strengthened steel (ODS); the ODS steel with an ultra-fine grain structure is prepared through high-energy ball milling and spark plasma sintering, and a martensitic structure is obtained through a special heat treatment process. Compared with the preparation processes of the traditional ODS steel and the martensitic steel, the method can obtain the martensitic structure with small grains without a complex thermal mechanical treatment process. The material has a tensile strength of 1000-1200 MPa at room temperature, has an elongation of 16-20%, and has a high-temperature strength of 280-320 MPa at 650 DEG C.

A turbine housing is disclosed, which defines: an inlet; an outlet; first and second volutes; and an axis of the housing. The first and second volutes respectively define first and second flow passages between the inlet and the outlet which respectively define first and second volute exits distal the inlet. The first and second volutes are defined around the axis. Each of the first and second volutes defines a critical plane. The first and second volutes are separated by a dividing wall. A thickness of the dividing wall varies with distance from the inlet. A thickness distribution of the dividing wall as a function of distance from the inlet is such that at least a portion of the dividing wall upstream of the critical planes of the first and second volutes has a thickness that is greater than the thickness of the dividing wall at said critical plane (s) by at least a first factor and wherein the first factor is 1.3 or greater. A method for designing a turbine housing of this type is also disclosed, the method comprising selecting a thickness distribution of the dividing wall upstream of critical planes of the first and second volutes in dependence on a thermomechanical performance of the turbine housing.

The application discloses a kind of high thickness of high bulk pulp and its preparation process, belong to papermaking technical field.The technical scheme is as follows: including the following steps, raw material preparation and pre-soaking treatment, reaction bin reaction, high consistency refining treatment, bleaching, latent elimination, low consistency refining, screening and washing, 1) raw material preparation and pre-soaking treatment: the raw material wood chip is broken, then pre-soaking is carried out, control pre-soaking temperature 80~90 ℃, pH value 9.8~10.2, liquid level ≥50%, ADI back pressure ≥4bar, NaOH dosage is 1.5%~2.0% of dry wood chip weight;2) high consistency refining treatment: the wood chip after pre-soaking is sent into high consistency refiner for refining, refining consistency 35~45%;3) bleaching: pulp after refining is sequentially subjected to one-stage bleaching and two-stage bleaching.The application process has high stability, and can realize the synchronous and stable improvement of bulk and freeness.

Title: Cryogenic equipment assembly such as a cryogenic exchanger assembly, optimized for thermomechanical contraction tolerance. The invention relates to an assembly (1) of cryogenic equipment (10, 20), said assembly (1) comprising: - a first cryogenic equipment (10) and a second cryogenic equipment (20) whose connection means (10B, 20B) are made of a first material, - a piping routing (30) fluidly connecting the first cryogenic equipment (10) and the second cryogenic equipment (10), - a main support (40) made of a second material having thermomechanical characteristics different from those of the first material, - an intermediate support (50) made of a material having thermomechanical characteristics such as those of the first material, the first cryogenic equipment (10) and the second cryogenic equipment (20) comprising support means (10A, 20A),preferably made of said first material, each support means (10A, 20A) being fixed to the main support (40) and to the intermediate support (50), each support means (10A, 20A) being fixed to said main support (40) with one degree of freedom. Figure for the abbreviation: Figure 2,