2results about How to "Reduce purity" patented technology

This invention discloses a high-alloy high-performance rotary guide component and its manufacturing method, belonging to the field of stainless steel technology. It solves the problems of poor microstructure uniformity and inability to simultaneously achieve mechanical properties and stress corrosion resistance in existing rotary guide components. The manufacturing method includes: smelting molten steel; preparing ingots; forging the ingots into steel billets using a high-speed forging machine after they are tapped from the furnace; heating and holding the steel billets; forging the steel billets into intermediate billets using a radial forging machine; water cooling the intermediate billets; forging the water-cooled intermediate billets a second time using a radial forging machine, followed by air cooling to obtain finished steel billets; straightening, machining, and shot peening of the finished steel billets to obtain rotary guide components; the composition of the rotary guide components, by mass percentage, includes: 18.00% ≤ Cr < 28.00%, 3.00% ≤ Mo ≤ 6.00%, 14.00% ≤ Ni ≤ 20.00%, 3.00% ≤ Mn ≤ 8.00%, Si ≤ 0.4%, Nb ≤ 0.25%, P ≤ 0.025%, S ≤ 0.02%, C ≤ 0.03%, N ≥ 0.3%, with the balance being Fe and other unavoidable impurities. The rotary guide components of this invention have fine and uniform grains and excellent mechanical and corrosion resistance.

This utility model belongs to the technical field of metallurgical casting production equipment, and relates to a vacuum casting trolley system, including a casting ladle, a trolley body, a locking device, a movable support frame, and a lifting device. Its operation is interference-free; upon reaching the casting position, it automatically locks, and a hydraulic cylinder drives the pouring port of the sliding gate at the bottom of the ladle to descend into the receiving port of the tundish for casting. After casting, the hydraulic cylinder lifts the ladle back to its original position, and the trolley returns to its initial position. This utility model has a simple and reliable structure, effectively solving the problems of frequent malfunctions, high risk of molten steel leakage, poor casting stability, high operational difficulty, and a dirty environment associated with traditional crane-lifted ladle casting equipment. It significantly improves production efficiency, casting quality, and safety, reduces labor and equipment costs, and improves the production environment and worker occupational health conditions. It has broad application prospects and significant practical value in the iron and steel metallurgy field.