44results about How to "Improve solidification quality" patented technology

A three dimensional printing apparatus including a tank, an injecting module, a leveling module, a curing module, and a control module is provided. The injecting module is disposed at the tank to inject a liquid forming material into the tank. The leveling module is movably disposed in the tank. The curing module is disposed above the tank. The control module is electrically connected to the injecting module, the leveling module, and the curing module. The leveling module is controlled by the control module to be moved in the tank, so as to level a surface of the liquid forming material. The curing module is controlled by the control module to cure the leveled liquid forming material to form a solidification layer.

The invention relates to a kerf-valving external water-cooled type electromagnetic soft contact continuous casing crystallizer, comprising a kerf copper pipe (1), an upper-section inner water jacket (3), a lower-section inner water jacket (2), an electromagnetic induction coil (4), a shell (8), an upper flange (9) and a lower flange (10), wherein the shell (8), the upper flange (9) and the lower flange (10) constitute a crystallizer assembly structure; the upper-section inner water jacket is made of engineering plastics and is sleeved in the electromagnetic induction coil; a groove (12) is machined on the outer wall of the outer wall surface of the kerf copper pipe along each kerf (5); a high-temperature resisting insulation sheet (11) is inserted into each kerf; bonding glue (120) is coated and filled in the groove; the edge of the inserted tail end of the insulation sheet slightly protrudes out of the bottom plane of the groove; and the high-temperature resisting insulation sheets and the serf copper pipe are fixed by the binding glue. A top rib sealing bar (8) which aims at each kerf is arranged between the outer wall of the kerf copper pipe and the upper-section inner water jacket. The invention has the advantages of strong electromagnetic permeability and safe and reliable cooling water path.

The invention provides a gun insertion type stopper rod device and a method using the same for absorbing inclusions at a gate. The device mainly comprises an absorption gun, a hollow stopper rod, a hot argon blowing device, horizontal clamps and a vertical lifting frame, the absorption gun is of a hollow bamboo-shaped structure and inserted into the hollow stopper rod of a long cylindrical structure, the upper end of the hollow stopper rod is fixed by the corresponding horizontal clamp, one end of the hot argon blowing device is connected on an external hot argon pipeline while the other end of the hot argon blowing device is inserted into a hollow pipe at the top of the hollow stopper rod, one end of the stopper rod horizontal clamp is connected with the vertical lifting frame while the other end thereof is mutually clamped with the hollow stopper rod, and one end of the absorption gun horizontal clamp is connected with the vertical lifting frame while the other end thereof is mutually clamped with the absorption gun. The method using the device for absorbing the inclusions at the gate includes the steps of gun insertion, argon sealing, gun descending, absorption and gun replacement. The device is scientific in structural design, part of time for gate changing is saved, smooth pouring of continuous casting is benefitted by using the device for absorbing sundries, molten steel cleanliness is improved, and gate nodulation probability is decreased.

The invention discloses an electroslag remelting device and a method thereof for preventing segregation of remelted alloys, and belongs to the technical field of electroslag remelting. It includes a crystallizer, a power supply and a magnetic field unit; the crystallizer includes a first crystallizer, a transition crystallizer and a second crystallizer from top to bottom; the first crystallizer and the transition crystallizer are insulated and connected, and the transition The crystallizer and the second crystallizer are insulated and connected; in the slag pool, the position corresponding to the bottom of the first crystallizer is the first slag pool layer, and the position corresponding to the top of the second crystallizer is the second slag pool layer , the bottom layer is the third slag pool layer; the power supply includes a first power supply and a second power supply; the first power supply connects the consumable electrode to the first slag pool layer; the second power supply connects the second slag pool layer Connect with the third slag pool layer. The invention can effectively avoid the bonding problem between the molten metal and the crystallizer, simultaneously improve the remelting efficiency and improve the solidification quality of the electroslag ingot.

The invention discloses a method for casting a large-scale steel ingot with a built-in cold core and an overhead electromagnetic field, which can cast a large-scale steel ingot with high yield and few central defects. The steps of the invention include: cold core preparation; cold core preheating; built-in cold core; air exhaust; steel ingot filling; top electromagnetic field; demoulding and cooling. The built-in cold core of the invention can effectively control the center defects of steel ingots, such as coarse crystal structure, center segregation, looseness, etc.; the top electromagnetic field can heat and stir the cap mouth liquid steel, which can effectively reduce the cap volume ratio of steel ingots and the cutting rate of pressure processing , promote solidification feeding and disperse element segregation of steel ingots, reduce thermal processing of steel ingots and improve the qualified rate of ultrasonic flaw detection of products. The invention is applicable to the casting of solid steel ingots and solid composite steel ingots of various specifications, materials and shapes.

The invention discloses an aerated concrete block wall structure, which comprises an inner wall and two outer walls, the front and rear sides of the inner wall are respectively provided with outer walls, and the inner wall includes a foundation wall , the foundation wall is embedded with a steel skeleton; the top of the foundation wall is evenly provided with a number of first construction columns and a number of second construction columns, and the first construction columns are built with the second construction columns. The matching wall body, the wall body is made of a number of aerated concrete blocks, and the aerated concrete blocks of the upper and lower floors are overlapped; the invention can greatly improve the whole device by setting the foundation wall The stability of the base, at the same time, by setting the first structural column and the second structural column as the skeleton of the wall body, and cooperating with each other to support the wall body, the strength of the inner wall can be greatly improved, and the wall can be effectively avoided. The appearance of cracks can effectively improve the service life of the entire wall structure.

The invention provides an H-shaped tubular mold, which comprises a web, wherein the center of the web of the working wall of the H-shaped tubular mold is provided with a covering layer, and the covering layer is formed by cermet material or metal material, which can resist high temperature and corrosion and the thermal conductivity of which is less than the thermal conductivity of the a material formed into the H-shaped tubular mold. The H-shaped tubular mold not only can prevent the web of a solidified shell from being affected and damaged by the stress produced by rapid chilling, but also can prevent the defect that thermal resistance is uncontrollably increased as the result of ununiform nonuniform air gaps formed by the earlier shrinkage of the initial solidified shell to affect the uniform growth of the solidified shell, so that the heat of the web of the solidified shell can be uniformly dissipated, and thereby therefore the H-shaped tubular mold increases the quality of solidification and prevents severe quality problems, such as cracks.

A three dimensional printing apparatus including a tank, an injecting module, a leveling module, a curing module, and a control module is provided. The injecting module is disposed at the tank to inject a liquid forming material into the tank. The leveling module is movably disposed in the tank. The curing module is disposed above the tank. The control module is electrically connected to the injecting module, the leveling module, and the curing module. The leveling module is controlled by the control module to be moved in the tank, so as to level a surface of the liquid forming material. The curing module is controlled by the control module to cure the leveled liquid forming material to form a solidification layer.