3results about How to "Uniform and stable performance" patented technology

The present application relates to the technical field of rail production process, in particular to a production method for improving wear resistance of channel rail for tram. After universal rolling, compressed air is applied to the channel rail for forced cooling in parts. In the first stage, supersonic air jet cooling is applied to the rail head tread, rail head running edge, rail head left side, rail lip and rail bottom to control the cooling speed of each part. In the second stage, supersonic air jet cooling is continuously applied to each part of the rail to control the cooling speed of each part. In the third stage, subsonic air jet cooling is applied to each part of the rail to control the cooling speed of each part, and then the rail is naturally cooled in air. The quenching effect of the channel rail tread and running edge is improved, the pearlite interlamellar spacing is refined, the rail strength and hardness are improved, and the channel rail has good wear resistance.

This invention discloses a low-cost rare earth weathering steel and its production process. The chemical composition and mass percentage of the weathering steel are as follows: C 0.06%~0.12%, Si 0.25%~0.50%, Mn 0.60%~1.00%, P 0.07%~0.12%, S≤0.005%, Cu 0.15%~0.40%, Cr 0.30%~0.50%, Ce 0.002%~0.015%, Alt 0.020%~0.050%, Ti 0.02%~0.08%, N≤0.006%, with the balance being Fe and unavoidable impurities. This weathering steel uses rare earth oxides added to refining slag, and a high-alkalinity, low-oxidizing refining process to improve rare earth yield. Rare earth inclusions and nozzle turbulence are modified through calcium-magnesium composite treatment, achieving rare earth micro-alloying to replace high-alloy additions. While meeting the mechanical properties and high corrosion resistance of 355MPa grade weathering steel, it significantly reduces alloy costs by more than 15% compared to traditional weathering steel. The process flow is compatible with existing production lines and is suitable for industrial mass production.

This invention discloses an integrated waterproofing and sealing construction system for the intersection nodes of municipal underground utility tunnels, belonging to the field of municipal engineering technology. It includes a base, a liquid storage tank fixedly connected to the right side of the upper surface of the base, a support block fixedly connected to the left side of the upper surface of the base, a pump fixedly connected to the upper surface of the liquid storage tank, a pumping pipe fixedly connected to the input end of the pump, and the output end of the pumping pipe extending into the interior of the liquid storage tank. A pipe clamping cavity is fixedly connected to the upper surface of the support block. This construction system achieves efficient utilization of waterproofing and sealing materials through multiple designs, significantly reducing construction costs and material waste. On one hand, the liquid storage tank is equipped with an integrated stirring and wall-mounting cleaning structure. A motor drives a rotating disk to move a rotating column and rod, causing the sliding vertical column to move up and down along the extension cavity. When the sliding block slides along the curved groove, it drives the stirring blades to rotate, continuously stirring the material.