31results about How to "Full escape" patented technology

The invention discloses a preparation method for low-silicon, high-calcium and large-crystal fused magnesia. The preparation method comprises the following two steps: preparation of high-activity MgOand smelting with an electric arc furnace, i.e., during preparation of high-activity magnesium oxide powder, adding a sodium carbonate solution with a concentration of 3 to 8%, then adding high-puritygraphite powder into the prepared high-activity magnesium oxide powder as a reducing agent, carrying out balling with a device, after balling is completed, carrying out smelting with a fully-automatic electric arc furnace, carrying out cooling and crystallizing, and carrying out crushing and picking so as to obtain a finished product. According to the invention, through addition of the sodium carbonate solution, the point of melting is effectively reduced; the temperature of calcination is reduced; and energy is saved. Meanwhile, through a reaction between sodium carbonate with silicon dioxide impurities, sodium silicate and carbon dioxide can be generated; the silicon dioxide impurities in magnesite can be effectively removed; and the content of magnesium oxide is improved. The low-silicon, high-calcium and large-crystal fused magnesia provided by the invention reaches an MgO content of 99.90% or above, achieves a calcium-to-silicon ratio of 2.30 or above, has good high-temperature fire resistance and high-temperature scouring resistance, and can be used as a high-quality advanced refractory material to be applied in the industries of aerospace, electronics, steel and iron, metallurgy, etc.

The invention belongs to the technical field of structural steels for ship and ocean engineering, and particularly relates to a 60mm steel plate with excellent performance in a thickness direction for an ocean platform and a production method thereof. The 60mm steel plate with excellent performance in the thickness direction for the ocean platform comprises the following chemical components by mass percent: 0.09-0.14% of C, 0.20-0.50% of Si, 1.10-1.50% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.030-0.060% of Nb, 0.010-0.020% of Ti, 0.015-0.050% of Als, the balance of Fe, and inevitable impurities. The steel plate has excellent performances in the thickness direction, steelmaking production adopts a single slag process, and the production method is simple and feasible.

The invention provides a gas protection welding method of 1000 MPa-level engineering machine high-strength steel thick plates. Welding base materials are Rm1000-1100 MPa engineering machine quenched and tempered steel plates in equal-thickness flat plate butt joint, a groove is a double-side V-shaped asymmetric groove, the angle of the groove is 60 degrees, a truncated edge is 2-3 mm long, and an assembly gap is 2 mm wide. According to welding materials, bottoming welding wires are 700 MPa-level solid-core gas-protected welding wires with the diameter of 1.2 mm, and filling and surface covering welding wires are 1000 MPa-level solid-core gas-protected welding wires with the diameter of 1.2 mm. The welding method includes the welding steps that bottoming welding is conducted, filling welding is conducted, surface covering welding is conducted, slow cooling is conducted after welding, and joint areas in the range of 300 mm on the two sides of a weld joint are covered with asbestos cloth. Preheating is not needed, after-heating is not conducted, strength and toughness of a joint are ensured, the variety of welding gas and replacement frequency of equipment and the welding wires are reduced, the high-strength advantage of high-strength steel can be fully achieved, and maneuverability is high.

The self-protecting welding wire with flux core for pipeline steel has welding wire comprising BaF2, SrF2 and / or CaF2 7-12 wt%, LiF 0.8-3.0 wt%, CaO 0.2-0.8 wt%, SiO2 0.1-0.4 wt%, Al 1.2-2.0 wt%, Mg 1.2-2.0 wt%, Mn 0.6-1.2 wt%, Ni 0.6-1.2 wt%, C 0.05- 0.10 wt%, Zr 0.05-0.3 wt%, B 0.002-0.012 wt%, and Fe for the rest; and flux core accounting for 18-25 wt%. It contains water in 0.010-0.120 wt%, and has reduced current fluctuation and raised welding performance.

The compound damping steel plate making process and apparatus adopts one identical heating furnace with upper stoving channel and lower stoving channel for preheating steel plate and heating glued steel plate separately, and five pairs of heating and laminating rolls to roll and combine two steel plates, with the damping resin layer between two steel plates being heated, pressurized and cured simultaneously. The present invention has effectively lowered power consumption, excellent steel plate laminating performance and simplified technological process, and may be applied widely in making compound damping steel plate with high molecule resin as the damping and adhering layer.

A mechanical impact device for effectively reducing laser cladding cracks mainly includes: a powder-feeding high-power semiconductor laser cladding device, a numerical control device and a mechanical impact assembly. In the present invention, the workpiece to be clad is clamped with a three-jaw or four-jaw chuck, powder is fed to the workpiece by a preset powder feeding method, and a mechanical impact of a certain frequency is applied to a single pass of laser cladding to obtain a cladding layer with excellent quality . The mechanical vibration caused by the impact can effectively break the dendrites that are preferentially precipitated in the molten pool, the grains are refined, the plasticity of the solidified crystals is improved, and thermal cracks are avoided. Secondly, the hammering effect of the mechanical impact hammer on the cladding single pass , can partially balance the residual tensile stress generated during the cooling process of the molten pool, reduce the appearance of cold cracks, and obtain a cladding layer with excellent quality.

The invention provides a low-temperature heating cigarette with a mint flavor, which comprises interconnected atomization matrix segments and a cooling nozzle rod; the structure of the cooling nozzle rod is a hollow cylindrical tubular structure, which sequentially includes a shell, an adhesive layer, and a cooling nozzle from outside to inside. layer, the adhesive layer bonds the shell and the cooling layer together, and the adhesive layer contains heat-sensitive microcapsules containing a solvent and mint-containing tobacco flavor, and the heat-sensitive microcapsules begin to release and dissolve after reaching the response temperature To change the bonding state and aroma state between the casing and the cooling layer, increase the surface area of ​​the cooling layer and change the airflow path of the smoke. In the present invention, the dissolving agent released by the heat-sensitive microcapsules can reduce the viscosity of the cooling layer and the casing under the influence of multiple effects such as lubrication and dissolution of the adhesive, thereby achieving the effect that the cooling layer falls off from the casing and the flue gas cooling effect Significantly, at the same time, the tobacco flavor contains mint aroma, and the sensory cooling effect is better.