METHOD FOR PRODUCING LONG PIPE pig large and medium-diameter hollow ingots billets ELEKTROSHLAKOV remelting of steel grades and 08H10N20T2 08H10N16T2 for withdrawable systems

摘要

1.method of producing long u043fu0435u0440u0435u0434u0435u043bu044cu043du044bu0445 pipes of big and medium diameter of hollow ingot, billet u044du043bu0435u043au0442u0440u043eu0448u043bu0430u043au043eu0432u043eu0433u043e remelting steel brands 08u044510u043d20u04422 and 08u044510 u043d16u04422 u0434u043bu00a0 extendable systems, including the casting of hollow billets or ingots u0446u0435u043du0442u0440u043eu0431u0435u0436u043du043e - canada u044du0448u043f, drilling central u043eu0442u0432u0435u0440u0441u0442u0438u00a0 bullion u044du0448u043f 1005,0 diameter mmthe heating u0446u0435u043du0442u0440u043eu0431u0435u0436u043du043e - blasting hollow billets or ingots u044du0448u043f temperatures plasticity, flashing bars u044du0448u043f as components of a rolling in the casings for one or two u043fu0440u043eu0448u0438u0432 key depending on the diameter of barsu043fu0440u043eu043au0430u0442u043au0443 on u043fu0438u043bu0438u0433u0440u0438u043cu043eu0432u043eu043c mill u0446u0435u043du0442u0440u043eu0431u0435u0436u043du043e - blasting hollow billet and casings of the bars u044du0448u043f in thick walled pipes with a diameter of subsequent 2 - 3 u043fu0435u0440u0435u043au0430u0442u043eu0432 of cent u0440u043eu0431u0435u0436u043du043e - blasting hollow billet and 1 - 2 u043fu0435u0440u0435u043au0430u0442u043eu0432 of u0441u0432u0435u0440u043bu0435u043du044bu0445 bars u044du0448u043f with u043fu0440u0438u043fu0443u0441u043au043eu043c under mechanical and thermal processing depending on the type of material and be the moat finished products - length, diameter and wall thickness, u043eu0442u043bu0438u0447u0430u044eu0449u0438u0439u0441u00a0 orderwhat as the duct plates using hollow ingots, billets u044du0448u043f with diameter to thickness ratio of the d / s = 3.0 - 5.5, the big u0437u043du0430u0447u0435u043du0438u00a0 which u043eu0442u043du043eu0441u00a0u0442u0441u00a0 to u043fu043eu043bu044bu043c u0441u043bu0438u0442u043au0430u043c - preserving larger diameter and length l = 2.75 - 3.25 m, large u0437u043du0430u0447u0435u043du0438u00a0 which u043eu0442u043du043eu0441u00a0u0442u0441u00a0 to u0441u043bu0438u0442u043au0430u043c of smaller diameter.;2. method for u043eu0442u043bu0438u0447u0430u044eu0449u0438u0439u0441u00a0 1, so that the hollow ingots u044du0448u043f u043eu0431u0442u0430u0447u0438u0432u0430u044eu0442 and u0440u0430u0441u0442u0430u0447u0438u0432u0430u044eu0442 in hollow ingots, billets, and removing the oxide and the defects of foundry production at all u0437u043du0430u0447u0435u043du0438u00a0 identities, which u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 of expressions;= place / (d - s);1 = K1DS / (d - s);where is the u0443u0434u0430u043bu00a0u0435u043cu043eu0433u043e metal in u043eu0431u0442u043eu0447u043au0435 hollow bars u044du0448u043f, mm;;1 - the u0443u0434u0430u043bu00a0u0435u043cu043eu0433u043e metal in u0440u0430u0441u0442u043eu0447u043au0435 hollow bars u044du0448u043f, mm;;d is the outer diameter of the hollow ingots u044du0448u043f, mm;;s - wall thickness hollow bars u044du0448u043f, mm;;to = 0.03 - coefficient in the u043eu0431u0442u043eu0447u043au0435 hollow bars u044du0448u043f;;k1 = 0.04 rate in u0440u0430u0441u0442u043eu0447u043au0435 hollow bars u044du0448u043f.;3. method for p.1, u043eu0442u043bu0438u0447u0430u044eu0449u0438u0439u0441u00a0, hollow ingots, billets u044du043bu0435u043au0442u0440u043eu0448u043bu0430u043au043eu0432u043eu0433u043e remelting after homogenization of uniformly heated to the temperature of 1200 1220u0441 at 1.8 - heating 2,0u0441 per minute with u043au0430u043du0442u043eu0432u043au043eu0439 180 in 20 - 25 min, and then at a temperature of 1200 1220u0441 are within 2.0 - 3.0 hours with u043au0430u043du0442u043eu0432u043au043eu0439 in 25 to 30 min and the time of heating a 9.0 - 12.0 hin this u0431u043eu043bu044cu0448u0430u00a0 duration heating and more u0432u0440u0435u043cu00a0 extracts u043eu0442u043du043eu0441u00a0u0442u0441u00a0 to u043fu043eu043bu044bu043c u0441u043bu0438u0442u043au0430u043c - preserving u044du0448u043f large diameters and wall thicknesses.;4. method for u043eu0442u043bu0438u0447u0430u044eu0449u0438u0439u0441u00a0 1, so that the heated to the temperature of the hollow billets u044du0448u043f u043fu0440u043eu043au0430u0442u044bu0432u0430u044eu0442 on u043fu0438u043bu0438u0433u0440u0438u043cu043eu0432u043eu043c mill with u043eu0431u0436u0430u0442u0438u0435u043c diameter of 30 - 45% and u0432u044bu0442u00a0u0436u043a s = 1.3 2.0.