213results about How to "Avoid surface defects" patented technology

The invention discloses a thermosetting resin composite facing material, which comprises a fiber reinforced layer, and a decorative layer and a basic layer which are respectively coated on the upper surface and the lower surface of the fiber reinforced layer. The decorative layer and the basic layer are made of functional thermosetting resin coating. By using the thermosetting resin composite facing material, the organic combination of a thermosetting resin coating layer and a fiber fabric layer is realized, and the obtained material has the advantages of high integrity, uniform performance, convenience in field laying, fewer gap and excellent performance. The excellent physical and chemical performance of thermosetting resin is inherited, the toughness of the material is increased, the material is more convenient and rapid to install and the application scope is wider. The invention additionally discloses a preparation method of the thermosetting resin composite facing material.

The invention discloses a luminescent centre regionally doped rare earth upconversion luminescent material and a preparation method thereof, which relates to the technical field of structural design and preparation of luminescent materials. For solving the problems of small doping amount in the luminescent center and low luminescent efficiency of the rare earth upconversion luminescent material, the conventional materials of the same kind take NaYF4 as a matrix, are doped with rare earth sensitized ions and rare earth luminescent ions and has a core/shell structure and nanocrystalline micro structure, wherein a luminescent shell layer is coated outside the core/shell structure, and a sensitized layer is the outmost layer. The preparation method of the rare earth upconversion luminescent material comprises: after a trifluoroacetate thermal decomposition method is implemented, adding a luminescent shell layer precursor into solution of nanoparticle colloid with the luminescent core/shell structure, heating, and reacting to form the luminescent shell layer; cooling the product obtained by the previous step, adding a sensitized shell precursor layer, heating, reacting and obtaining a sensitized shell layer on the outside of the luminescent shell layer; and thus, obtaining the luminescent centre regionally doped rare earth upconversion luminescent material.

A process prevents a reduction in the strength of the joint between the liner components, and assures high productivity without impairment. The peripheral walls (6, 7) of the liner component (4) and each of the second liner components (5) are brought into contact with each other, a probe (22) of friction agitation joining tool (20) is placed into the two liner components across the contact portions thereof, and the probe (22) in rotation is thereafter moved relative to the two liner components (4, 5). Assuming that the number of revolutions of the probe (22) is R rpm and that the speed of joining of the two liner components (4, 5) is V mm/min, R/V is in the range of 2≦R/V≦12.

The present invention provides for a copper CMP slurry composition which comprises a complexing agent, an oxidizer, an abrasive and a passivating agent. The present invention also provides for a method of chemical mechanical planarization of a copper conductive structure which comprises administering the copper CMP slurry composition during the planarization process.

A lubricating oil composition for hot tandem rolling of wide steel band contains a component (d) composed of a surface layer which is dialkylbithiophosphoric acid or monocarboxy fatty acid, and a kernel which is the nano TiO2 particle. Its advantages are excellent lubricating performance, high resistance to emulsifying, and no deposition and demixing.

The invention provides partially endcapped polyether siloxanes, the use of these polyether siloxanes as foam stabilizers and also rigid polyurethane or polyisocyanurate foams obtained using the polyether siloxanes.

The invention belongs to the technical field of titanium alloy blade forging and discloses a titanium alloy blade forging method. The titanium alloy blade forging method includes the following steps that the machining allowance of a corresponding forged piece is determined according to part drawings and technical design parameters of a titanium alloy blade; a corresponding hot forging drawing is designed. The twist angle of the titanium alloy blade is determined according to the hot forging drawing and the following formula of theta=(alpha1+alpha2)/2, wherein the alpha1 is the included angle between a profile chord length line of a tip of the titanium alloy blade and the chord direction of the titanium alloy blade, and the alpha2 is the included angle between the profile chord length line of a root of the titanium alloy blade and the chord direction of the titanium alloy blade. A finish forging die is made according to the hot forging drawing and the twist angle of the titanium alloy blade. A forged-piece rough profile is designed according to the hot forging drawing, and a tire mold is made according to the size and shape of the designed forged-piece rough profile. A blank is subjected to on-hammer rough profile forging through a free forging hammer to form the forged-piece rough profile; then, the forged-piece rough profile is subjected to on-hammer die forging through the finish forging die.

A method of and apparatus for casting metal strip involving assembling a pair of casting rolls laterally disposed to form a nip between them, assembling an elongated metal delivery nozzle extending along and above the nip between the casting rolls, with at least one segment having opposing side walls and end walls, an inner trough extending longitudinally within between side walls and forming passages between the side walls and the inner trough and communicating with side outlets adjacent bottom portions, introducing molten metal through the elongate metal delivery nozzle to form a casting pool of molten metal supported on the casting rolls above the nip, such that molten metal is caused to flow into the inner trough of the delivery nozzle, from the inner trough through the passages between the inner trough and sidewalls, and from the passages through the side outlets in a substantially lateral direction into the casting pool, and counter rotating the casting rolls to deliver cast strip downwardly from the nip.

A high-strength cold-rolled steel sheet providing a product with a good surface condition after press forming, having excellent bake hardenability and anti room temperature aging property, and having a dual phase structure with a tensile strength of at least 340 MPa is provided.

A high-strength cold-rolled steel sheet has a structure comprising a main phase which is a ferrite and a secondary phase which is a low temperature transformation product including a martensite and has a hardness distribution of the ferrite phase in an arbitrary cross section having a length of 10 mm in the widthwise direction of the sheet which satisfies the relationship prescribed by (Hv_(max)−Hv_(ave))<0.5×(Hv_(ave). Hv_(max) is the maximum Vickers hardness of ferrite grains in a region at a distance of from (⅛)t to (¼)t in the thickness direction from the surface when the thickness of the high-strength cold-rolled steel sheet is t, and Hv_(ave) is the average Vickers hardness of ferrite grains in this region.

The invention discloses a chemical high-chromium cast iron roller which comprises a high-chromium cast iron work layer and a nodular cast iron roller core. Chemical components of the high-chromium cast iron work layer comprise, by mass percent, 2.1%-2.9% of C, 0.4%-0.8% of Si, 0.5%-08% of Si, 0.5%-0.8% of Mn, 15%-20% of Cr, 0.5%-2% of Ni, 0.5%-2% of Mo, 0.2%-3.0% of V, 0.1%-0.4% of Ti, 0.2%-0.8% of Cu, 0.01%-0.03% of RE, smaller than 0.15% of P, smaller than 0.15% of S and the balance iron. During preparation, a composite centrifugation method is adopted for casting; during heat treatment, thetemperature of a forming roller is increased to range from 920 DEG C to 960 DEG C at the speed ranging from 9 DEG/h to 12 DEG/h, heat preservation is carried out, after quenching, the temperature isincreased to range from 200 DEG C to 250 DEG C for tempering, and heat preservation is carried out for 8 h to 10 h. Laser strengthening treatment is carried out, tempering is carried out at the temperature ranging from 200 DEG C to 250 DEG C, and after heat preservation is carried out for 2 h to 3 h, the chemical high-chromium cast iron roller is obtained. According to the chemical high-chromium cast iron roller, no chip off-falling phenomenon happens in the use process, the roller has good corrosion resistance and high hardness and wear resistance, and the service life of the roller is prolonged.

The present invention relates to the field of corrosion inhibitor, and discloses an acid pickling corrosion inhibitor and a pickling method by using the same. The acid pickling corrosion inhibitor includes a quaternary ammonium compound, thiourea, HEDP and / or its salts, and phytic acid and / or tannic acid. The acid pickling corrosion inhibitor can be used for special steel such automobile structural steel, and has less usage amount and excellent corrosion performance; automotive structural steel hot rolled pickling plate with good surface quality can be obtained; and the method has low operation costs and good economic benefit.

The present invention relates to a method of refining a stainless steel with high purity in where a raw material melted in an electric furnace is processed in an argon oxygen decarburization (AOD) refining furnace to be output to a ladle and then subjected to a continuous casting, wherein the occurrence of the refractory hard inclusion material is suppressed by controlling composition and basicity of the slag after the refinery surface reduction process and using the desulphurization process, so that ductility of the inclusion material can be improved and surface defects and cracks of a product can be prevented. The present invention provides a method of refining a stainless steel in where a raw material melted in an electric furnace is processed in an argon oxygen decarburization (AOD) refining furnace to be output to a ladle and then subjected to a continuous casting, wherein a basicity of a slag obtained after reduction process by using the argon oxygen decarburization (AOD) refining furnace is controlled to be in a range between 1.5 and 1.8, wherein a dolomite is used as a refractory material for the ladle, and wherein a composite (% Al2O3)+(% MgO) in the slag is less than 13.

The invention relates to an ultrahigh molecular weight polyethylene fiber/rubber composite material and a preparation method thereof. The composite material comprises, by mass, 100 parts of rubber, 20-50 parts of a semi-reinforcing agent, 2-10 parts of an activator, 1-5 parts of sulfur, 1-5 parts of a vulcanization accelerator, 20-50 parts of a plasticizer , and 1-10 parts of an ultrahigh molecular weight polyethylene fiber. The preparation method comprises the steps of mixing above raw materials except the ultrahigh molecular weight polyethylene fiber in an open rubber mixing machine to obtain a semi-finished rubber product, and carrying out composite vulcanization on the semi-finished rubber product with the ultrahigh molecular weight polyethylene fiber. The composite material maintains the original mechanical properties of the rubber and the fiber, and the shear effect of the composite material improves the bonding performance of the fiber in the rubber, so the problem of difficult bonding of the fiber to the rubber due to the smooth surface of the fiber is solved; the composite material allows a matrix material to be directly firmly combined with the fiber, and is suitable for anti-aging low saturation rubber; and the preparation method has the advantages of simplicity, reduction of the raw materials and the consumption of energy in the process, cost saving, and suitableness for industrial mass production.