103results about How to "Control cracking" patented technology

A hydrocracking catalyst is provided that includes a crystalline molecular sieve material component having a faujasite structure and an alpha acidity of less than 1, preferably 0.3 or less, and a dispersed Group VIII noble metal component. The extremely low acidity allows selective hydrocracking of the aromatic and naphthenic species in a feedstock, while limiting the cracking of paraffins. The catalyst produces improved yields of products, such as diesel fuel, at high conversion rates and with high cetane values.

A low-temp steam curing method for in-situ cast box beam includes such steps as spraying insulating layer on external mould, laying down steam tubes, building steam curing shed, burying a temp strain gauge at each measuring point, parallelly connecting them via a switch to a reader, laying aside, heating, making temp constant, cooling and post curing. Its advantages are high speed, high strength and no crack.

Disclosed are low temperature, moisture curable coating compositions, related coated substrates, and methods for coating a substrate. The coating compositions include an ungelled, secondary amine-containing Michael addition reaction product of reactants including a compound comprising more than one site of ethylenic unsaturation, and an aminofunctional silane.

The invention provides a growth method for preparing a sapphire single crystal with a Kyropoulos method. The growth method mainly comprises the following control phases: a shouldering phase, an equal-diameter growth phase and an ending phase, wherein the shouldering phase is performed after seeding ending and comprises an initial shouldering stage and a later shouldering stage, the cooling speed is controlled by adjusting the voltage and matched with the crystal pulling speed to achieve stable growth at the initial shouldering stage, the crystal grows to about 1.5 kg after 20-25 h growth, and the crystal enters the later shouldering stage, the voltage adjusting quantity is smaller than that in the initial shouldering stage, the pulling speed is increased at the later shouldering stage and cooling is performed gradually, growth is performed for 45-52 h, and the crystal grows to about 4 kg and enters the equal-diameter growth phase; the crystal pulling speed is decreased at the equal-diameter growth phase, cooling is accelerated simultaneously, growth is performed for 75 h, and the crystal grows to about 28 kg-32 kg and enters the ending phase; and the cooling speed is further decreased and fast pulling is performed at the ending phase, and automatic draw-off is achieved. The growth method for preparing the sapphire single crystal with the Kyropoulos method can solve the problem that more bubbles exist in the sapphire single crystal grown with the conventional Kyropoulos method.

A method of manufacturing semiconductor light emitting elements with improved yield and emission power uses laser lift-off and comprises the steps of forming a semiconductor grown layer formed of a first semiconductor layer, an active layer, and a second semiconductor layer on a first principal surface of a growth substrate; forming a plurality of junction electrodes apart on the second semiconductor layer and forming guide grooves arranged in a lattice to surround each of the junction electrodes in the second semiconductor layer; joining together a support and the semiconductor grown layer via the junction electrodes; projecting a laser to separate the growth substrate; dividing the semiconductor grown layer into respective element regions for the semiconductor light emitting elements; and cutting the support, thereby separating into the semiconductor light emitting elements. Removed regions include regions where the guide grooves are formed, and side walls of the second semiconductor layer formed by the guide grooves have a beveled shape at intersections of the guide grooves.

An ink jet recording material having excellent ink-absorption and appropriate for high speed recording has an ink receiving layer formed on a substrate material and including a first coating layer formed on the substrate material and including a pigment (for example, wet process silica fine particles) and a binder; a second coating layer formed on the first coating layer and including a pigment (for example, gas phase process silica or alumina) and a binder; and a third coating layer formed on the second coating layer and including a pigment containing colloidal particles, and alumina and/or pseudo boehmite fine particles.

An image forming device including: a fixing unit that fixes a toner image formed on a recording medium by heating the toner image to a temperature that is higher than the softening point of a toner that forms the toner image; and a cooling unit that cools the fixed toner image from a temperature that is higher than the softening point of the toner, to a temperature that is lower than the softening point of the toner, at a predetermined cooling speed.

An electrode for a lithium secondary battery comprises a current collector composed of a metal incapable of alloy formation with lithium, a thin film formed by depositing on the current collector and composed of an active material containing tin as a main component, and a tin oxide layer formed on the surface of the thin film.

The invention relates to a low-carbon boron-containing steel continuous casting slab corner crack control method. The method includes the steps that firstly, component control is conducted; secondly,the hot metal ratio in the converter smelting process is controlled to range from 85.0% to 87.0%, a bottom blowing mode is adopted in the whole process, nitrogen is blown firstly and argon is blown secondary in the blowing process, blowing is achieved through one shot, and the use proportion of nitrogen and argon is 1:9; thirdly, the C content of the smelting end point is controlled to range from0.035+/-0.02, and the tapping temperature ranges from 1660+/-5 DEG C; fourthly, a half-deoxygenation technology is adopted for tapping in the converter smelting tapping process; fifthly, deoxidizing and alloying are conducted at the same time in the tapping process; sixthly, after tapping is conducted, a steel ladle is directly converted into an argon station for argon blowing refining; and seventhly, in the continuous casting process, strong cooling control is conducted on a wide and narrow foot roll area of the continuous casting billet, a second area, a third area and a fourth area of a vertical bending area and a first section of an arc section, and then conventional cooling control is adopted on the second section, the third section, the fourth section, the fifth section, the sixth section, the seventh section and the eighth section of the arc shape. By means of the low-carbon boron-containing steel continuous casting slab corner crack control method, the casting billet corner crack generation rate of the low-carbon boron containing steel is stably controlled to be smaller than 0.1%.

The invention discloses a method for controlling the defect of sintering expansion of powder metallurgy material and products thereof and a mold. In the sintering process of powder body, three-dimensional restraint compressive stress is applied to the body, thus generating restraint action to the body, restraining volume expansion generated by physical or chemical reactions of the body in the sintering process, realizing restraint sintering, controlling sintering densification thereof and eliminating the defects of sintering expansion. A restraint mold (1) is internally provided with an external mold; the matching conicity between the restraint mold (1) and the external mold is Theta which is larger than 5 degrees and smaller than 15 degrees; the external mold is internally provided with an internal mold; and a spacer (6) which is used for preventing the reaction of the body and the mold is arranged between the internal mold and the sintering body. The invention is a restraint sintering method which can effectively prevent the powder metallurgy material and products thereof from generating expansion, deformation, cracking and pore/hole and the like and can improve the sintering density and quality; and the using method of the mold is simple and easy to operate.

A process for hydrocracking hydrocarbon-containing VD feedstocks allowing the improved production of middle distillates: a) hydrocracking of feedstocks in hydrogen and at least one hydrocracking catalyst, b) gas/liquid separation of effluent originating from a) producing a liquid effluent and a gaseous effluent with hydrogen, c) comprising the gaseous effluent before recycling into hydrocracking a), d) fractionation of liquid effluent into at least one effluent of converted hydrocarbon-containing products having boiling points less than 340° C. and an unconverted liquid fraction having a boiling point greater than 340° C., e) hydrocracking unconverted liquid fraction from d), in hydrogen and a hydrocracking catalyst, f) hydrotreating effluent from e) in a mixture with a hydrocarbon-containing gas-oil liquid feedstock having at least 95% by weight of compounds boiling at a boiling point between 150 and 400° C., hydrotreating f) operating in hydrogen and with at least one hydrotreating catalyst.

Provided is a secure apparatus for protecting the integrity of a software system and a method thereof. The apparatus comprises: a template repository for storing templates required for generating an agent template; a template generator for randomly selecting one template from said template repository and generating a new agent template according to the selected template; and a transceiver for sending said new agent module to an external apparatus communicating with said secure apparatus to update a current agent module which is running in said external apparatus, wherein said current agent module is used to verify the integrity of said software system running in said external apparatus. The secure apparatus can protect software in an insecure environment with a high software protection level to prevent the software from being tampered or bypassed.

The invention discloses an assembly type pavement structure and a construction method, and aims to effectively improve the connection safety, the adjustment capability and the repairable capability of a prefabricated pavement, facilitate the manufacturing and transportation of the prefabricated pavement, and facilitate the assembly, repair, replacement and construction. Prefabricated pavement slabs are assembled on a roadbed to form an assembled pavement, each prefabricated pavement slab is of a prestressed reinforced concrete structure, longitudinal lower grooves are formed in the two longitudinal connecting ends of each prefabricated pavement slab at intervals in the width direction, and transverse lower grooves are formed in the two transverse connecting ends of each prefabricated pavement slab at intervals in the width direction. Rod-shaped connecting components are arranged in the corresponding longitudinal lower grooves or the corresponding transverse lower grooves of every two adjacent prefabricated pavement slabs. An isolation layer is laid on the surface of the roadbed, after the assembled prefabricated pavement slab is leveled, self-compacting concrete is densely poured into a gap between the laid isolation layer and the prefabricated pavement slab to form an adjusting layer, and positioning bosses which protrude upwards and are embedded into longitudinal lower grooves and transverse lower grooves of the prefabricated pavement slab are formed on the adjusting layer.

The invention discloses a method for manufacturing novel, energy-saving and environmental-friendly bicycle pipe support components through bamboo skin coiled materials. The method comprises the following steps that firstly, moso bamboo is selected and steamed; secondly, the bamboo is flattened, pressure maintaining and rolling-in are carried out on the bamboo, and the bamboo is processed in a planing mode; thirdly, drying is carried out, and gluing and machining are carried out; fourthly, assembling and hot-pressing are carried out, and bamboo skin coils are pressed into the bamboo skin coiled materials; fifthly, the components (some components can be made of bamboo pressing sheets according to the practical application) needed by all pipe supports are made of the bamboo skin coiled materials, and component assembling is carried out. By the adoption of the technical scheme, a bicycle is better in stability, the weight of the bicycle can be reduced, and meanwhile the overall strength of the bicycle is further improved; the bicycle is firmer, so that guarantee is provided for safe use; the bicycle and the manufacturing method are economical and practical, economic benefits and social benefits are obvious, and therefore the method can be popularized and applied conveniently.

A method of preventing disruption of a taped finished drywall board joint in a room having a center ridge member and angularly inclined ceiling rafters which involves a metallic connector positioned between the wallboard sections and the ridge member and rafters. The connector has two metallic wings with a center longitudinal bendable connection. The wings have flexible tabs at their free edges which are attached to the rafters and the connector itself is attached to the wallboard adjacent to the ridge member. The wallboard also is attached to the rafters 8-12 inches from the edges of the wings. Because the tabs can bend away from the wings, this construction allows the joint to flex if the rafters warp or shrink without disrupting the finish coating on the outside of the wallboard joint at the ridge member. The connector also can be applied to other critical joints in a home where the framing members are subject to movement such as flat ceilings to avoid truss uplift or rafter movement. The wings have longitudinal corrugations in the wings and tabs to strengthen the tape. In one embodiment two wings are connected by a polymeric tape. In another embodiment, the connector is a unitary metallic part with a longitudinal line of perforations connecting the wings along the centerline to allow the connector to be bent to form the two diverging wings.