42results about How to "Offset shrinkage" patented technology

The invention relates to high temperature storage material manufacturing method. It includes selecting material, mixing, and preparing. It includes the following steps: using basalt as coarse aggregate, bauxite as fine aggregate, and aluminate cement as cementation agent; and adopting silicon micro-powder, activated alumina powder, natural graphite powder, and kyanite micro-powder as material; mixing them; adding 4-6% water; putting in steel mould and demoulding after 24 hours; setting in water at 20-25 centigrade degree for 72 hours; and baking at 100-120 centigrade degree for 24 hour. The formed material has high all round properties, and can avoid environmental pollution.

A vehicular panel structure includes a panel, a reinforcement disposed inward of the panel in a vehicle, and mastic that bonds the panel and the reinforcement to each other. The reinforcement is provided with a body portion constituting a middle portion in a longitudinal direction and having a linear expansion coefficient smaller than the linear expansion coefficient of the panel, a connection portion constituting an end portion in the longitudinal direction, and a joining portion allowing the body portion and the connection portion to be joined to each other by a thermosetting adhesive and a fastener. A long hole portion is disposed in the reinforcement and is formed in either the connection portion or the body portion. The fastener is inserted into the long hole portion.

The invention relates to a plastic material for repairing a medium-frequency furnace lining and a preparation method of the plastic material. According to the technical scheme, the preparation method comprises the following steps: taking 18 to 30 percent by weight of aluminum oxide powder, 10 to 20 percent by weight of kyanite, 2 to 7 percent by weight of chromium oxide powder and 2 to 5 percent by weight of a plasticizer as base materials, and taking 50 to 65 percent by weight of alumina particles as aggregates, wherein the sum of the base materials and the aggregates are raw materials; mixing the base materials for 1 to 1.5h, then adding the aggregates and the mixed base materials into a mixing and grinding machine, adding 3 to 5 percent by weight of phosphoric acid and 3 to 5 percent by weight of water, mixing and grinding, thus obtaining semi-dry paste; aging, adding the aged semi-dry paste into the mixing and grinding machine, additionally adding 2 to 3 percent by weight of phosphoric acid, 0.05 to 0.15 percent by weight of a corrosion inhibitor, 0.1 to 0.5 percent by weight of a moisturizing agent and 3 to 5 percent by weight of water, mixing and grinding, thus obtaining mixed paste, extruding and molding the mixed paste, thus obtaining the plastic material for repairing the medium-frequency furnace lining. The production cost is low, the prepared product is long in storage time, easy to construct and excellent in application performance.

The invention discloses a machine-pressed non-burning clay brick and a preparation method thereof, comprising the following components: hard clay, soft clay, quartz sand, pyrophyllite, dispersant, solid binder and liquid binder; Non-fired clay bricks can reach the normal temperature strength of fired clay bricks by drying at 120°C, without high temperature firing, low energy consumption, simple production process, high medium temperature strength, and small volume change at high temperature, which not only saves production The cost also reduces problems such as waste gas pollution caused by firing, omits the firing process of traditional clay bricks, and realizes energy saving and emission reduction of refractory clay bricks.

The heat insulating corundum-mullite brick has the material composition comprising fused white corundum powder finer than 325 mesh 30-40 wt%, alpha-alumina powder finer than 325 mesh 20-30 wt%, gamma-alumina powder finer than 10 microns 20-30 wt%, sillimanite powder finer than 120 mesh 10-20 wt%, No. 1 Suzhou clay powder finer than 280 mesh 8-15 wt% and water 25-30 wt%, as well as foamed polystyrene balls of 0.5-2 mm size and saw dust in 0-0.5 mm size in certain amount. The heat insulating corundum-mullite brick has long service life, capacity of resisting high temperature up to 1700 deg.c, high resistance to various kinds one atmosphere, low heat conductivity, low heat capacity and excellent heat shock stability.

The invention relates to a method for preventing deformation during a welding process, in particular to a method for preventing the deformation of a large-size thin-wall annular casting during the welding process. The method is characterized in that the method comprises the following steps of: preparation before welding: preparing a shim plate used for supporting at least five points of the casting so as to ensure that the casting is padded flatly and cannot be deformed by external forces during the welding, and an anti-deformation welding tooling, and then fixing the casting on the tooling; pre-heating before welding; selection of parameters of the welding process; and control of the welding process. The method provided by the invention is unique; the quality of the casting can be ensured; the production cycle can be shortened; the working efficiency can be improved; and the production cost can be saved.