RU2006133358A

RU2006133358A - HIGH-QUALITY HARNESS STAINLESS STEEL HIRE

Info

Publication number: RU2006133358A
Application number: RU2006133358/02A
Authority: RU
Inventors: Андрей Алексеевич Угаров (RU); Андрей Алексеевич Угаров; Евгений Иванович Гонтарук (RU); Евгений Иванович Гонтарук; Анатолий Адольфович Лехтман (RU); Анатолий Адольфович Лехтман; Вячеслав Иванович Фомин (RU); Вячеслав Иванович Фомин; Михаил Викторович Бобылев (RU); Михаил Викторович Бобылев
Original assignee: Открытое акционерное общество "Оскольский электрометаллургический комбинат" (RU); Открытое акционерное общество "Оскольский электрометаллургический комбинат"
Priority date: 2006-09-19
Filing date: 2006-09-19
Publication date: 2008-03-27
Also published as: RU2355785C2

Abstract

1. Сортовой прокат, круглый, в прутках, из борсодержащей стали, горячекатаный, имеющий заданные параметры неметаллических включений, структуры, размера действительного зерна, механических свойств, прокаливаемости, отличающийся тем, что прокат получают из стали содержащей следующее соотношение компонентов, мас.%:при выполнении следующих соотношении сумма:(As+Sn+Pb+5·Zn)≤0,07;прокат имеет неметаллические включения по сульфидам точечным, оксидам точечным, оксидам строчечным, силикатам хрупким, силикатам пластичным, силикатам недеформируемым со средним баллом не более 3,5 по каждому виду включений, пластинчатую ферритоперлитную структуру, размер действительного зерна от 5 до 9 баллов, макроструктуру - центральная пористость, точечная неоднородность, ликвационный квадрат не более 3 баллов по каждому виду, подусадочная ликвация не более 3 баллов; ликвационные полоски не более 1 балла, механические свойства после закалки и низкого отпуска: временное сопротивление разрыву не менее 1200 МПа, предел текучести не менее 1110 МПа, относительное удлинение не менее 12%, относительное сужение не менее 62%, ударная вязкость KCU(+20) не менее 1470 кДж/м, обрабатываемость резанием - величина износа по задней грани резца (h) при равном пути резания (L) - при L=1320 м, hне более 0,30 мм.2. Сортовой прокат по п.1, отличающийся тем, что в качестве примесей сталь дополнительно содержит, мас%: медь не более 0,30, молибден не более 0,03, фосфор не более 0,035.3. Сортовой прокат по п.1 или 2, отличающийся тем, что при содержании в стали углерода 0,16-0,20% и серы 0,005-0,020%, прокат имеет механические свойства после закалки и низкого отпуска: временное сопротивление разрыву не менее 1200 МП1. Long products, round, in bars, made of boron-containing steel, hot-rolled, having predetermined parameters of non-metallic inclusions, structure, actual grain size, mechanical properties, hardenability, characterized in that the steel is obtained from steel containing the following ratio of components, wt.%: when the following ratio is fulfilled, the sum: (As + Sn + Pb + 5 · Zn) ≤0.07; rolled metal has nonmetallic inclusions in point sulfides, point oxides, line oxides, brittle silicates, plastic silicates, non-deformable silicates with an average score of not more than 3.5 for each type of inclusions, lamellar ferritic perlite structure, actual grain size from 5 to 9 points, macrostructure - central porosity, point heterogeneity, segregation square of not more than 3 points for each type, shrinkage segregation of not more than 3 points; segregation strips not more than 1 point, mechanical properties after hardening and low tempering: temporary tensile strength not less than 1200 MPa, yield strength not less than 1110 MPa, elongation not less than 12%, relative narrowing not less than 62%, impact strength KCU (+20 ) not less than 1470 kJ / m, machinability - the amount of wear along the rear edge of the cutter (h) with an equal cutting path (L) - at L = 1320 m, h not more than 0.30 mm. 2. Sections according to claim 1, characterized in that the steel further comprises, as impurities, wt%: copper not more than 0.30, molybdenum not more than 0.03, phosphorus not more than 0.035.3. Long products according to claim 1 or 2, characterized in that when the content of carbon in the steel is 0.16-0.20% and sulfur 0.005-0.020%, the steel has mechanical properties after quenching and low tempering: a temporary tensile strength of at least 1200 MP

Claims

1. Long products, round, in bars, made of boron-containing steel, hot-rolled, having predetermined parameters of non-metallic inclusions, structure, actual grain size, mechanical properties, hardenability, characterized in that the steel is obtained from steel containing the following ratio of components, wt.%:

carbon 0.16-0.23 manganese 0.60-0.90 silicon 0.17-0.37 chromium 0.70-1.10 sulfur 0.005-0.035 nickel 0.80-1.00 aluminum 0.02-0.05 titanium 0.01-0.06 nitrogen 0.005-0.010 boron 0.001-0.005 calcium 0.001-0.010 arsenic 0.0001-0.03 tin 0.0001-0.02 lead 0.0001-0.01 zinc 0.0001-0.005 iron and inevitable impurities rest,

when performing the following ratio, the amount:

(As + Sn + Pb + 5 Zn) ≤0.07;

rolled metal has nonmetallic inclusions on point sulfides, point oxides, line oxides, brittle silicates, plastic silicates, undeformable silicates with an average score of no more than 3.5 for each type of inclusions, lamellar ferritoperlite structure, actual grain size from 5 to 9 points, macrostructure - central porosity, point heterogeneity, segregation square of not more than 3 points for each type, shrinkable segregation of not more than 3 points; segregation strips not more than 1 point, mechanical properties after hardening and low tempering: temporary tensile strength not less than 1200 MPa, yield strength not less than 1110 MPa, elongation not less than 12%, relative narrowing not less than 62%, impact strength KCU (+20 ) not less than 1470 kJ / m ² , machinability - the amount of wear along the rear edge of the cutter (h ₃ ) with an equal cutting path (L) - at L = 1320 m, h ₃ not more than 0.30 mm.

2. Long products according to claim 1, characterized in that the steel further comprises, as impurities, wt%: copper not more than 0.30, molybdenum not more than 0.03, phosphorus not more than 0.035.

3. Long products according to claim 1 or 2, characterized in that when the content in the steel is carbon 0.16-0.20% and sulfur 0.005-0.020%, the steel has mechanical properties after quenching and low tempering: temporary tensile strength not less than 1200 MPa, yield strength of at least 1110 MPa, elongation of at least 14%, relative contraction of at least 64%, impact strength KCU (+20) of at least 1800 kJ / m ² , machinability - the amount of wear along the rear edge of the cutter (h ₃ ) with an equal cutting path (L) - at L = 1320 m, h ₃ not more than 0.30 mm.

4. Long products according to claim 1 or 2, characterized in that when the content of carbon in the steel is 0.18-0.23% and sulfur is 0.020-0.035%, the steel has mechanical properties after quenching and low tempering: temporary tensile strength not less than 1250 MPa, yield strength not less than 1180 MPa, elongation not less than 12%, relative narrowing not less than 62%, impact strength KCU (+20) not less than 1470 kJ / m ² , machinability - the amount of wear along the rear edge of the cutter (h ₃ ) with an equal cutting path (L) - at L = 1320 m, h ₃ not more than 0.20 mm.