Steel for the manufacture of forging having a bainitic structure and
process for manufacturing a forging
    4.
    发明授权
    Steel for the manufacture of forging having a bainitic structure and process for manufacturing a forging 失效
    用于制造具有贝氏体结构的锻造的钢和用于制造锻造的方法

    公开(公告)号:US5762725A

    公开(公告)日:1998-06-09

    申请号:US757283

    申请日:1996-11-27

    CPC分类号: C22C38/32 F16C3/02

    摘要: Steel for the manufacture of forgings having a bainitic structure and the mechanical properties of which are: R.sub.p0.2 .gtoreq.800 MPa, R.sub.m .gtoreq.1000 MPa, K.sub.cu .gtoreq.50 J/cm.sup.2 its chemical composition comprising, by weight: 0.05%.ltoreq.C.ltoreq.0.12%, 0.1%.ltoreq.Si.ltoreq.0.45%, 1.01%.ltoreq.Mn.ltoreq.1.8%, 0.15%.ltoreq.Cr .ltoreq.1.15%, 0.06%.ltoreq.Mo.ltoreq.0.12%, Cu.ltoreq.0.30%, Ni.ltoreq.0.30%, 0.01%.ltoreq.Ti.ltoreq.0.04%, 0.005%.ltoreq.Al.ltoreq.0.04%, 0.006%.ltoreq.N.ltoreq.0.013%, 0.0005% 5 B.ltoreq.0.004%, P.ltoreq.0.025%, 0.02%.ltoreq.S.ltoreq.0.1%, 0%.ltoreq.Pb.ltoreq.0.1%, 0%.ltoreq.Te.ltoreq.0.07%, optionally from 0.0002% to 0.002% of calcium, the balance being iron and impurities resulting from the smelting, the chemical composition furthermore satisfying the relationship: 0.2% .ltoreq.Ni+Mo+Cu.ltoreq.0.7%, the uncombined boron content not being less than 0.0005% above 950.degree. C. Process for the manufacture of a forging.

    摘要翻译: 用于制造具有贝氏体结构的锻件的钢,其机械性能为:Rp0.2> / = 800MPa,Rm> / = 1000MPa,Kcu> / = 50J / cm 2,其化学组成包含按重量计: 0.05%C = 0.12%,0.1%≤Si≤0.45%,1.01%

    Method of fabrication of a piece of structural steel, and the steel
fabricated thereby
    5.
    发明授权
    Method of fabrication of a piece of structural steel, and the steel fabricated thereby 失效
    一种结构钢的制造方法和由此制造的钢

    公开(公告)号:US5667605A

    公开(公告)日:1997-09-16

    申请号:US569348

    申请日:1995-12-08

    摘要: The invention relates to a method for fabricating a piece of structural steel that includes thermal or thermomechanical treatment steps that could ordinarily lower the fatigue strength and shock and impact resistance of the steel piece. In the method of the invention a workpiece of microalloy steel is fabricated containing the following elements in the mounts indicated and having a bainitic structure:______________________________________ C 0.05-0.5 wt. % Mo 0-0.5 wt. % Mn 1-2 wt. % V 0-0.30 wt. % Si 0.05-1.5 wt. % B 0-0.010 wt. % Cr 0.1-1 wt. % Ti 0-0.030 wt. % Nb 0-0.1 wt. % ______________________________________ The workpiece is then subjected to a treatment that includes a heating stage wherein at least a part of said piece is subjected to a temperature in the range 500.degree.-900.degree. C., followed by a cooling stage in which at least the part of the piece is subjected to cooling at a rate greater than 500.degree. C./hr. The composition and bainitic structure of the workpiece prevents its fatigue strength and shock and impact resistance from lowering in the part heated within the 500.degree.-900.degree. C. range. The invention further encompasses the structural steel fabricated by the aforementioned method.

    摘要翻译: 本发明涉及一种用于制造一种结构钢的方法,其包括通常可以降低钢板的疲劳强度和冲击和抗冲击性的热或热机械处理步骤。 在本发明的方法中,制造的微合金钢的工件在所示的安装件中包含以下元件,并具有贝氏体组织:-C 0.05-0.5wt。 %Mo 0-0.5wt。 % - Mn 1-2wt。 %V 0-0.30重量% %-Si 0.05-1.5wt。 %B 0-0.010wt。 % - Cr 0.1-1重量% %Ti 0-0.030wt。 % - Nb 0-0.1重量% % - 然后对工件进行包括加热阶段的处理,其中所述件的至少一部分经受500-900℃的温度,随后是冷却阶段,其中至少部分 以大于500℃/小时的速率进行冷却。 工件的组成和贝氏体结构防止其在500-900℃范围内加热的部件的疲劳强度和冲击和抗冲击性降低。 本发明还包括通过上述方法制造的结构钢。

    Steel for the manufacture of separable mechanical components and
separable mechanical component
    7.
    发明授权
    Steel for the manufacture of separable mechanical components and separable mechanical component 失效
    用于制造可分离机械部件和可分离机械部件的钢

    公开(公告)号:US5769970A

    公开(公告)日:1998-06-23

    申请号:US767430

    申请日:1996-12-16

    CPC分类号: C22C38/60

    摘要: Steel useful for the manufacture of a separable mechanical component, whose chemical composition preferably comprises, by weight: 0.25%.ltoreq.C.ltoreq.0.75%, 0.2%.ltoreq.Si.ltoreq.1.5%, 0.1%.ltoreq.Mn.ltoreq.2%, 0%.ltoreq.Ni.ltoreq.1%, 0%.ltoreq.Cr.ltoreq.1%, 0%.ltoreq.Mo.ltoreq.1%, 0%.ltoreq.Cu.ltoreq.1%, 0%.ltoreq.V.ltoreq.0.2%, 0.02%.ltoreq.S.ltoreq.0.35%, 0.04%.ltoreq.P.ltoreq.0.2%, 0%.ltoreq.Al.ltoreq.0.005%, 0.005%.ltoreq.N.ltoreq.0.02%; optionally at least one element taken from lead, tellurium and selenium in contents of less than 0.1%, the balance being iron and impurities resulting from the smelting, the steel being optionally treated with calcium. Use of the steel for the manufacture of a separable component and component obtained.

    摘要翻译: 可用于制造可分离机械组分的钢,其化学组成优选包含:0.25%C = 0.75%,0.2%Si = 1.5%,0.1%Mn 0%