68results about How to "Guaranteed quenching effect" patented technology

The invention discloses a method for preparing an environment-friendly water-soluble hardening agent and belongs to the field of preparation of hardening agents. The invention belongs to divisional application, and the original Chinese patent application number of is 201310350402.X. According to the preparation method, all components of the hardening agent are guaranteed to be completely dispersed and uniformly distributed by virtue of controlling the feeding sequence of the raw materials and temperature and stirring time, so that the hardening agent meets the hardening requirement, can be used for strictly controlling the cooling speed of large shafts to prevent hardening crack, greatly lowering the initial cooling speed and the cooling speed at a temperature of below 400DEG C and lowering the internal stress of workpieces, has fast enough cooling speed for 650-450DEG C, and guarantees the hardening effect while guaranteeing the product not to be cracked by hardening; after being hardened, large workpieces are not cracked by hardening.

The invention belongs to the technical field of iron and steel production, and in particular relates to a safety protection device for producing iron and steel. There is an extrusion mechanism. One end of the extrusion mechanism penetrates the center of the inner bottom of the liquid holding pool and extends to the inside. The side wall of the liquid holding pool is surrounded by an installation groove. The installation groove is rectangular. The liquid cavity is arranged in communication, and a protective mechanism is provided in the installation groove. A cooling return mechanism is fixedly connected to the outer wall of the liquid storage pool, and the cooling return mechanism is connected to the liquid storage cavity. The advantage is: when quenching large metal castings, the protective plate can be automatically lifted, so that the high-temperature fireball or liquid splashes into the surrounding environment, and at the same time it does not affect the direct observation of external staff, which is effective Improved protection for personal safety.

The invention belongs to the technical field of aluminum alloy materials for electric power equipment and particularly relates to a method for manufacturing large-sized aluminum alloy bars with high strength and high electrical conductivity. The large-sized 6082 bars with high strength and high electrical conductivity, especially 6082T6 aluminum alloy bars with diameter from 150mm above to 300mm, are utilized for processing large-sized electrical elements with high strength and high electrical conductivity in the electric power equipment. An aluminum alloy ingot used in the method contains the following elements in percentage by mass: 1.0%-1.05% of Si, no more than 0.12% of Fe, no more than 0.10% of Cu, 0.55%-0.65% of Mn, 0.9%-0.95% of Mg, no more than 0.10% of Cr, no more than 0.10% of Zn, no more than 0.05% of Ti, no more than 0.05% of isolated impurity, no more than 0.15% of total impurities, and the balance being Al. According to the method, mass production and delivery can be achieved, the strength and the electrical conductivity of the large-sized aluminum alloy bars are enhanced, and processing and use are facilitated; the mechanical property and the electrical conductivity of the large-sized aluminum alloy bars obtained by the method are stable; in repeated operation, the bars can satisfy the Chinese standard of bars with diameter smaller than 150mm, the Chinese standard of bars with diameter from 150mm above to 300 mm can be supplemented or perfected and each performance index can be introduced into the Chinese standard.