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    Process For Heat Treatment of Parts Made From Low and Specified Hardenability Structural Steel
    2.
    发明申请
    Process For Heat Treatment of Parts Made From Low and Specified Hardenability Structural Steel 审中-公开

    公开(公告)号：US20150232969A1

    公开(公告)日：2015-08-20

    申请号：US13991961

    申请日：2011-04-28

    申请人： Anatoly Alexeevich Kuznetsov ,  Arkady Moissevich Peker ,  Alexey Alexandrovich Kupriyanov ,  Sergey Ivanovich Nikitin ,  Ignor Semenovich Lerner

    发明人： Anatoly Alexeevich Kuznetsov ,  Arkady Moissevich Peker ,  Alexey Alexandrovich Kupriyanov ,  Sergey Ivanovich Nikitin ,  Ignor Semenovich Lerner

    IPC分类号： C22C38/58 ,  C21D9/46 ,  C21D9/52 ,  C21D6/00 ,  C21D1/06 ,  C21D1/18 ,  C22C38/54 ,  C22C38/50 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/34 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D9/36

    CPC分类号： C21D1/18 ,  C21D1/06 ,  C21D2211/002 ,  C21D2211/009 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54

    摘要： The invention refers to hardening thermal treatment of the perlite-class steel. The technical result is to obtain a finer austenite grain ##11-13 GOST5639 (ASTM), more stable hardenability level (DI), with a substantially smaller deviation and which strictly corresponds to the depth of the hardened layer obtained directly on parts subjected to thermal treatment, as well as the ability of treating thinner, smaller and other parts with the through-surface and through-thickness hardening. To achieve the technical result, a method for thermal treatment of parts made from low (LH) and specified (SH) hardenability structural steel is proposed for parts shaped as a sphere, cylinder, plate, including through-surface hardening by through-surface heating of the part or its effective cross-section, up to the temperatures of austenitization and cooling with a liquid refrigerant at the rate of more than 40,000 kcal/m2.h.0C., tempering, with hardening of parts made from steel containing the following components, weight %: carbon—.15-1.2, manganese—no more than 1.8, silicon—not more than 1.8, chrome—not more than 1.8, nickel—not more than 1.8, molybdenum—not more than .5, tungsten—not more than 1.5, boron—not more than .007, copper—not more than .9, aluminum—.03-.1, titanium—not more than .4, vanadium—not more than .4, nitrogen—not more than .1, zirconium—not more than .4, calcium—not more than .03, sulphur—not more than .035, phosphorous—not more than .035, iron and unavoidable admixtures—rem., with the ideal diameter determined by the formula: Dkp.=K·{square root over (C)}·(1+4.1·Mn)·(1+0.65·Si)·(1+2,33·Cr)·(1+0.52·Ni)·(1+0.27·Cu)·(1+3.14·Mo)·(1+1.05·W)·[1+1.5(0.9−C)]·(1−0.45C′)·(1−0.3Ti)·(1−0.35V)·(1−0.25 Al) where Der is the ideal diameter (DI), mm K—is the coefficient whose value depends on the actual austenite grain size ##6-13 according to the ASTM scale, GOST5639; C, Mn, Si, Cr, Ni, Cu, Mo, W are the components, weight %, contained in the austenite solid solution at the final heating temperature preceding hardening cooling, [1+1.5(0.9−C.)] is the multiplicand taken into account only if boron is present in steel in the amount of .002-.007 weight %; C′, Ti, V, Al are components, weight %, not contained in the austenite solid solution, but present in the form of structurally-free secondary carbonitride phases at the final heating temperature preceding hardening cooling, C′ is carbon content in the excessive hypereutectoid steel cementite, with surface hardening done through a pre-specified depth the value of which is determined from a graph depending on the sphre cylinder diameter, plate thickness and ideal diameter.

    Process For Making Low and Specified Hardenability Structural Steel
    3.
    发明申请
    Process For Making Low and Specified Hardenability Structural Steel 审中-公开
    制造低指定硬化性结构钢的方法

    公开(公告)号：US20130213184A1

    公开(公告)日：2013-08-22

    申请号：US13881434

    申请日：2010-12-31

    申请人： Anatoly Alexeevich Kuznetsov ,  Arkady Moissevich Peker ,  Alexey Alexandrovich Kupriyanov ,  Sergey Ivanovich Nikitin ,  Ignor Semenovich Lerner

    发明人： Anatoly Alexeevich Kuznetsov ,  Arkady Moissevich Peker ,  Alexey Alexandrovich Kupriyanov ,  Sergey Ivanovich Nikitin ,  Ignor Semenovich Lerner

    IPC分类号： C21C7/00

    CPC分类号： C21C7/00 ,  C21C5/28 ,  C21C5/5264 ,  C21C5/562 ,  C21C7/0006 ,  C21C7/0075 ,  C21C7/06 ,  C21C7/076 ,  C21C2300/08 ,  C22C33/04 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/50 ,  Y02P10/216 ,  Y02W30/54

    摘要： The invention refers to metallurgy, in particular to making low (LH) and specified (SH) hardenability steels in electric arc, induction furnaces or oxygen converters. A metallurgical unit is loaded with metal charge consisting of iron carbon alloy, scrap with a specified content of manganese, silicon, chrome, nickel and copper, providing for the final content of each of them of not more than 0.1 weight %, graphite, slag-forming components, refining of the melt with respect of carbon content prior to heat tapping in a ladle of ladle furnace is done in an electric arc or induction furnace until the carbon content conforms to the corresponding upper tolerance limit or lower than that in the converter followed by carburization in the ladle, slag composition adjustment during the refining and pure rimming periods is done by flushing a portion of slag and recurrent addition of slag-forming materials to the remaining portion of the slag to make sure the content of each of the permanent admixtures in the melt during tapping is not more than 0.1 weight %, then the melt is deoxidized in the ladle or ladle furnace with aluminum (1.0-2.5 kg/t), titanium and vanadium. The invention makes it possible to obtain better mechanical properties and stable hardenability characterized by the ideal diameter (DI): DI of a billet from 6 to 15 mm has a deviation of not more than 2 mm; DI of a billet from 16 to 50 mm has a deviation of not more than 5 mm; DI of a billet from 51 to 100 mm has a deviation of not more than 10 mm; DI of a billet over 100 mm has a deviation of less than 50 mm and better mechanical properties.

    摘要翻译： 本发明涉及冶金学，特别是在电弧，感应炉或氧气转化器中制备低（LH）和特定（SH）淬透性钢。 一个冶金单元装载有由铁碳合金，特定含量的锰，硅，铬，镍和铜的废料组成的金属电荷，其中各自的最终含量不超过0.1重量％，石墨，渣 在电铸炉或感应炉中进行在钢包炉的钢包中进行热量攻丝之前相对于碳含量的熔体的精炼，直到碳含量符合相应的上限公差或低于转炉 随后在钢包中渗碳，精炼期间的炉渣组成调整和纯化过程是通过将一部分炉渣冲洗并将渣渣形成材料再次添加到炉渣的剩余部分来确保每个永久物的含量 在出料时熔体中的混合物不超过0.1重量％，然后在钢包或钢包炉中用铝（1.0-2.5kg / t），钛和钒 adium。 本发明可以获得更好的机械性能和以理想直径（DI）为特征的稳定的淬透性：6至15mm的坯料的DI具有不大于2mm的偏差; 16〜50mm的坯料的DI的偏差不大于5mm; 51至100mm的钢坯的DI的偏差不大于10mm; 超过100mm的坯料的DI具有小于50mm的偏差和更好的机械性能。

    Structural Steel For Through-Surface Hardening
    5.
    发明申请
    Structural Steel For Through-Surface Hardening 审中-公开

    公开(公告)号：US20160017468A1

    公开(公告)日：2016-01-21

    申请号：US13979167

    申请日：2011-04-28

    申请人： Anatoliy Alexeevich Kuznetsov ,  Arkadiy Moiseevich Peker ,  Alexey Alexandrovich Kupriyanov ,  Igor Semyonovich Lerner

    发明人： Anatoliy Alexeevich Kuznetsov ,  Arkadiy Moiseevich Peker ,  Alexey Alexandrovich Kupriyanov ,  Igor Semyonovich Lerner

    IPC分类号： C22C38/58 ,  C22C38/50 ,  C22C38/46 ,  C22C38/02 ,  C22C38/42 ,  C22C38/34 ,  C22C38/06 ,  C22C38/04 ,  C22C38/54 ,  C22C38/44

    CPC分类号： C22C38/58 ,  C21D1/18 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54

    摘要： The invention refers to development of chemical composition of perlite-class structural steels hardened by thermal treatment—through-surface hardening (TSH). The technical result is to obtain low and specified hardenability 3rd generation LH (SH) steels with a finer austenite grain ##11-13 GOST5639 (ASTM), even more stable preset hardenability (DI) with a substantially smaller To obtain a finer austenite grain and more stable hardenability—DI, with a substantially smaller deviation range and hardened layer depth directly obtained on parts subjected to TSH, as well as the possibility of machining thinner, smaller and other parts with the through-surface and through-thickness hardening. To achieve the technical result, structural steel was proposed for through-surface hardening with the following components ratio, weight %: carbon—0.15-1.2; manganese—not more than 1.8; silicon—not more than 1.8; chrome—not more than 1.8; nickel—not more than 1.8; molybdenum—not more than 0.5; tungsten—not more than 1.5; boron—not more than 0.007; copper—not more than 0.3; aluminum—0.03-0.1; nitrogen—not more than 0.1; titanium—not more than 0.4; vanadium,—not more than 0.4; zirconium—not more than 0.4; niobium—not more than 0.1; tantalum—not more than 0.1; calcium—not more than 0.03; sulphur—not more than 0.035; phosphorus—not more than 0.035; iron and unavoidable admixtures—rem., with ideal diameter determined by the following mathematical formula: Dkp.=K·√C·(1+4.1·Mn)·(1+0.65·Si)·(1+2.33·Cr)·(1+0.52·Ni)·(1+0.27·Cu)··(1+3.14·Mo)·(1+1.05·W)·[1+1.5(0.9−C)]·(1−0.45C′)·(1−0.3Ti)·(1−0.35V)·(1−0.25Al), Where: Dcr is the ideal diameter, mm, K is the coefficient whose value depends on the actual austenite grain size according to the ASTM, GOST5639; C, Mn, Si, Cr, Ni, Cu, Mo, W are components, weight %, contained in the austenite solid solution at the final heating temperature preceding hardening cooling, [1+1.5(0.9−C)] is the multiplier taken into account only if boron is present in steel in the amount of 0.002-0.007 weight %; C′, Ti, V, Al are components, weight %, not contained in the austenite solid solution, but present in the form of structurally-free secondary carbonitride phases at the final heating temperature preceding hardening cooling, C′ is carbon in the excessive cementite of hypereutectoid steel.