The heat-treated large forgings of copper strip are mainly directly forged from steel ingots. Therefore, it is necessary to consider the influence of smelting, ingot casting, casting and other processes on the internal quality of the castings during heat treatment. Only the influencing factor is that the chemical composition is not uniform in a variety of smelting. The existence of shortcomings; coarse and uneven crystal grains; more gas and impurities; greater casting stress and heat treatment stress.
The purpose of heat treatment after casting of large forgings is to avoid white spots and hydrogen embrittlement, improve the internal arrangement of forgings, eliminate casting stress, reduce hardness and improve cutting functions, so that they can obtain outstanding mechanical functions or prepare for future heat treatment. The casting of 317L stainless steel pipe belongs to the casting of large forgings. Manganese can increase the strength of steel, weaken and eliminate the adverse effects of sulfur, and improve the hardenability of steel. High-alloy steel (high manganese steel) with high manganese content has outstanding wear resistance and other physical properties. Features. Silicon can increase the hardness of steel, but its plasticity and resistance are reduced. Electrical steel contains a certain amount of silicon, which can improve the soft magnetic function. Tungsten can improve the red hardness and thermal strength of steel, and can improve the wear resistance of copper strips. Chromium can improve the hardenability and wear resistance of steel, and can improve the corrosion resistance and oxidation resistance of steel.
Vanadium can refine the grain arrangement of steel and improve the strength, resistance and wear resistance of steel. When it melts into austenite at high temperature, it can increase the hardenability of steel; on the contrary, when it exists in the form of carbides, it will reduce its hardenability. Molybdenum can significantly improve the hardenability and thermal strength of the copper strip, avoid temper brittleness, increase remanence and coercivity, and titanium can refine the grain arrangement of the copper strip, thereby improving the strength and resistance of the copper strip. The advantages of the convection technology of the copper strip are very light. Under the same heat dissipation conditions, the copper tube convection radiator has a larger inner cavity and a lighter weight than other radiators. Assuming that the component of the steel column radiator is 1.0, the finned tube convector is 1.06, the plate type is 0.7, and the copper tube convective radiator is only 0.51; after the copper tube convective radiator is filled with water, the structural load of the building should be light. After the copper tube convection radiator is filled with water, the structural load of the building should be light. The conditioning is sensitive. Because the mechanism and internal structure of the radiator are different, the water capacity of the copper tube convection radiator is the smallest. Therefore, this kind of products can adjust the indoor temperature very sensitively and accurately by using the temperature control valve, and the temperature rises quickly.
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