52results about How to "Improve coagulation tissue" patented technology

A process for preparing the Al-base composition under strong magnetic field includes such steps as heating Al to 850 deg.C, holding the temp for 30 min, adding reinforcing Al2O3 particles (or short fibres), stirring, pouring in mould, solidifying for 20 min strong magnetic field system and cooling in air. Its equipment is composed of metallic ladle, heating system, thermoelectric couple, reinforcing material delivering pipe, stirring coil, casting mould, supporter, slide sprue, vacuum chamber or protecting gas chamber, and the strong magnetic field control system consisting of strong magnetic field genrator, cooling water pipe, alarm and temp control unit and insulating layer.

The invention relates to the filed of the manufacture of continuous casting billets, in particular to a method for improving inner quality of a continuous casting billet with a thick and large section, which can solve the problems of the centerline shrinkage, porosity and segregation of the continuous casting billet with the thick and large section in the prior art. In the invention, through controlling degree of purity of molten steel and degree of superheat of pouring, and cooperatively adopting the micro-region oscillation technology and the solidification self-feeding technology, the inner quality of the continuous casting billet can be improved. The micro-region oscillation technology can effectively eliminate the defects of segregation in the continuous casting billet, can also effectively reduce solidification tissues, and decreases the centerline shrinkageand porosity; and the solidification self-feeding technology can realize simultaneous solidification and plastic movement of solid metal in the subsequent solidification shrinkage process, so that the purpose of radial self-feeding of high-temperature deformable metal can be achieved, further, the centerline shrinkage in the continuous casting billet can be eliminated, and the porosity in the continuous casting billet can be remarkably improved and is even eliminated. The invention is suitable for carbon steel, alloy steel and nonferrous metal casting billets with the thick and large sections, particularly for continuous casting sheet billets with the thickness being over 300mm, square billets, and round casting billets with the section phi being over 500mm.

The invention relates to a laser therapy system comprising: a first laser generator for generating vaporized slicing laser; a first light-combine mirror which has an angle of 45 degrees to said vaporized slicing laser; a second laser generator for generating coagulated hemostasis laser which has an angle of 45 degrees to the first light-combine mirror and vertical to the vaporized slicing laser; a first reflection mirror with a angle of 45 degrees to the vaporized slicing laser; a third laser generator for generating the guiding laser with an angle of 45 degrees to the first laser reflection mirror and vertical to the vaporized slicing laser; a optical fiber coupler vertical to the guide laser; a optical fiber connected to the optical fiber coupler; a endoscope connected to the optical fiber; and a optical filter connected to the endoscope. Wherein, the first light-combine mirror is plated a layer which is high transparent to the vaporized slicing laser and high reflective to the coagulated hemostasis laser; the first reflection mirror is plated a layer which is high reflective to the vaporized slicing laser and the coagulated hemostasis laser; and the input end of optical fiber coupler is plated a layer which is high transparent to the vaporized slicing laser and the coagulated hemostasis laser.

The present invention provides a continuous casting method capable of increasing non-oriented silicon steel medium-thickness continuous cast slab equiaxial crystal rate. It is characterized by that it adopts a medium-thickness slab continuous casting machine, in the continuous casting second cooling zone it adopts a roller electromagnetic stirring equipment. The casting billet size of continuous casting machine is 100-150mmX850-1550mm, pouring speed is 1.5-3.5m / min, the cooling pattern: the narrow edge of crystallizer is 14-25m3 / h, the wide edge of crystallizer is 250-290m3 / h and second cooling intensity is 1.3-1.8L / kg. The described electromagnetic stirring equipment includes 2-4 pairs of introroller built-in traveling wave magnetic field type electromagnetic stirring devices which are assembled into two groups and mounted.

The invention discloses an electrode for applying pulse current to a continuous casting tundish. The electrode is characterized by comprising a cone frustum shaped fireproof material (2) and an electrode distribution plate (3) embedded into the fireproof material (2); a plurality of rod-like small electrodes (4) are vertically distributed on the surface of the electrode distribution plate (3); the rod-like small electrodes (4) pass through the cone frustum shaped fireproof material (2), and the ends of the rod-like small electrodes (4) are naked on the surface of the cone frustum shaped fireproof material (2) and connected with molten steel; the bottom end of the electrode distribution plate (3) is provided with a pulse current connecting end (1); and the pulse current connecting end (1) passes out of the bottom end face of the cone frustum shaped fireproof material (2) and is connected with a pulse power supply. The electrode has the advantages of strong high-temperature oxidation resistance and molten steel melting resistance, long service life, good conductivity, simple and feasible operation in a pulse processing process, safety and reliability.

The invention provides a production method of high-strength high-plasticity TWIP (Twinning Induced Plasticity) steel, and belongs to the technical field of metallurgy. The TWIP steel comprises 0.03%-0.08% of C, 2.0%-3.0% of Si, 20%-30% of Mn, 2.5%-3.5% of Al, the balance of Fe and a small amount of other alloying elements. The TWIP steel is smelted by adopting a slag system comprising 60-70% of CaF2, 20-30% of Al2O3 and 5-15% of CaO; a right amount of manganese metal or electrolytic manganese and aluminium powder are added to slag so as to solve the problems of easy oxidization and burning loss of volatile elements in the TWIP steel. Argon is used for protecting remelting at a flow rate of 20-40Nm<3> / h, so that the burning loss of aluminium is reduced; the refinement is carried out at a low melting rate, and the melting rate is controlled at 700-950kg steel / hour. In a feeding period, electric currents gradually decline, and the feeding time is greater than 1.5 hours. The production method has the advantages that by adopting the electroslag remelting method, cracks are prevented from occurring in a TWIP solidification process, the solidification structure and the segregation condition of the TWIP steel can be improved, and meanwhile, the cleanliness of the TWIP steel can also be obviously improved.