CN1229013A - 钢制元件的制造方法 - Google Patents

钢制元件的制造方法 Download PDF

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CN1229013A
CN1229013A CN99104004.XA CN99104004A CN1229013A CN 1229013 A CN1229013 A CN 1229013A CN 99104004 A CN99104004 A CN 99104004A CN 1229013 A CN1229013 A CN 1229013A
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steel
hot forming
temperature
component
under
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CN1131116C (zh
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伦德·托雷
拉尔森·斯塔凡
奥伦德·帕特里克
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Ovako Steel AB
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • F16C33/64Special methods of manufacture
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/02Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S148/00Metal treatment
    • Y10S148/902Metal treatment having portions of differing metallurgical properties or characteristics
    • Y10S148/906Roller bearing element

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)
  • Forging (AREA)

Abstract

一种制造在高应力、负荷和/或磨损下工作的如滚动轴承元件之类的钢制元件的制造方法,其特征在于:从在约800—1100℃的热成形温度下有奥氏体碳含量为0.55—0.85%重量的钢开始;在高于钢的A1温度下热成形元件;直接从热成型温度在空气下淬硬元件,可以加水进行强制的对流;把元件进行硬机加工到最后的尺寸;对元件进行表面精加工。 

Description

钢制元件的制造方法
本发明涉及钢制元件的制造方法,这些元件在高应力、负荷和/或磨损下工作,如滚动轴承元件。
通常,如滚动轴承元件之类的元件由含1%C的钢制造。这种钢加热到约1100℃,和在热成形步骤中成形,随后在空气中冷却。其次,钢经软退火,随后经软机械加工,随后在850℃油淬或盐淬硬化,随后经磨削及表面精加工。之后,元件可以装配。制造方法中最费钱的部分是磨制步骤。即使在软机械加工步骤后元件具有要求的最终尺寸及精度,硬化步骤会引起元件的变形,总成本中大部分要用在磨削步骤。
另外,在热成形处理后元件至少两次加热到高温导致高的能量消耗。处理过程也是费时的,并且由于有淬火步骤,该已知的过程也造成环境污染及有着火的危险。
SE-C-467829公开了一种具有共析成分的钢制造元件的方法,按照该方法,在刚高于钢的A1温度下毛坯成形为至少近似地有最终尺寸,随后热成形元件直接从热成形温度硬化。按照最佳实施例,在加热到热成形温度前不要进行软退火步骤。热成形是一种半热的成形方法,在750-800℃下进行,元件直接从热成形温度在油中淬火,得到足够的硬度。
该方法的重要优点在于可取消费时的、成本高的、复杂的软退火工序。但该方法可需进一步改进。
本发明的目的就是解决现有技术存在的上述问题,提供一种比现有技术能量消耗低、加工时间短、对环境更有利及更安全的,制造在高应力、负荷和磨损下使用的钢制元件的制造方法。
为实现本发明的上述目的,本发明提供了一种制造在高应力、负荷和/或磨损下工作的如滚动轴承元件之类的钢制元件的制造方法,其特征在于:
-从在约800-1100℃的热成形温度下有奥氏体碳含量为0.55-0.85%重量的钢开始;
-在高于钢的A1温度下热成形元件;
-直接从热成形温度在空气下淬硬元件,可以加水进行强制的对流;
-把元件进行硬机加工到最后的尺寸;
-对元件进行表面精加工。
通过把热成形步骤中热量用在硬化步骤中,使能量消耗节省了。在元件硬化后进行硬机加工,因此在元件达到最终尺寸后不需要再硬化,不需要磨削或只需很少的磨损,使得时间及成本大大节省了。另外的重要优点是取消了通常的淬火步骤,因此也没有对环境的污染及安全方面的危险。
相应于钢中其余的合金元素,碳含量作了调整,因此在热成形步骤中在奥氏体中溶解的碳的浓度为0.55-0.85%重量。采取这一技术措施,元件不会开裂,和在空冷步骤中元件将完全硬化。
下面通过实施例借助附图更详细地说明本发明,附图中:
图1示出用按照本发明的方法制成的真实尺寸的环形部分的硬度分布。
在按照本发明的方法中,钢必须设计成在热成形温度有合适的奥氏体碳含量。太高的溶解碳含量会导致淬火裂纹。
另外,钢的淬硬性必须使得进行很温和的或慢的淬火(如在空气中冷却)时,环形部分能整个硬化。
下面的实例示出本发明,但是本发明不局限于所讨论的钢的成分。本发明的专业人员可根据要求的最终成分的性能,使用本说明书的信息改变不同的合金成分的含量。实例 方法
目标是在热轧后直接完全硬化的环(9kg/工件)。锻造温度在开始时约为1100℃,和在最终成型步骤降到约850℃。环在传送带上经受稍微的强制的空冷。当环达到室温,它们后淬火到5℃。之后,环在150℃回火1小时。
随后,环进行硬机械加工,并经过表面精加工。材料的化学成分
与传统的处理的AISI 52100钢成分比较,在从锻造温度进行温和淬火下,成分最佳化得到相等的或改善的性能(整个截面>60HRC,和近似15%的残余奥氏体)。由于在锻造温度下,所有的使用的合金元素在固溶体中,有下面的考虑:
0.66%重量的C-碳含量必须足够低以避免淬火裂纹及过份量的残余奥氏体,但是要足够高以达到要求的硬度水平。
1.45%重量的Si-硅含量必须选择为比较高以增加硬度面对Ms温度没有太大的影响,并抑制残余奥氏体分解及渗碳体沉淀。因此硬化及回火结构在加热下稳定,不会由于暴露在热条件下而软化。
0.28%重量的Mn-与例如AISI52100比在正常水平。与淬硬性收益相比,锰使Ms温度下降太多(对珠光体及贝氏体转变的影响)。
1.51%重量的Cr-与例如AISI52100比在正常水平。铬可以增加淬硬性。
1.03%重量的Ni-加入镍将明显地增加淬硬性。另外,会影响马氏体的韧性。
0.23%重量的Mo-大大增加淬硬性,特别影响珠光体转化。
硬度和结构
达到的硬度为62.5HRC,整个环的截面均匀,见图1。结构是马氏体及约15%残余奥氏体。讨论
表1示出用与传统的马氏体AISI 52100元件不同的新材料通过新方法制成的产品的性能。
                               表1
用与传统的马氏体AISI 52100钢元件相比更佳的钢及用新方法处理的元件的性能。
回火(150℃)后硬度 韧性 结构稳定性 最大工作温度 在长工作时间后保持硬度的性能
  新     相等 相等   更高     更高     更高

Claims (2)

1.一种制造在高应力、负荷和/或磨损下工作的如滚动轴承元件之类的钢制元件的制造方法,其特征在于:
-从在约800-1100℃的热成形温度下有奥氏体碳含量为0.55-0.85%重量的钢开始;
-在高于钢的A1温度下热成形元件;
-直接从热成形温度在空气下淬硬元件,可以加水进行强制的对流;
-把元件进行硬机加工到最后的尺寸;
-对元件进行表面精加工。
2.按照权利要求1的方法,其特征在于所述的钢的成分为>0.55%C,0-2% Si,0-2% Mn,0-20% Cr,0-5% Ni,0-3% Mo,及加有0-1% V和/或Nb。
CN99104004.XA 1998-03-16 1999-03-16 钢制元件的制造方法 Expired - Fee Related CN1131116C (zh)

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SE9800859-2 1998-03-16
SE98008592 1998-03-16
SE9800859A SE521771C2 (sv) 1998-03-16 1998-03-16 Sätt att tillverka komponenter av stål

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EP (1) EP0943694B1 (zh)
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DE (1) DE69928463T2 (zh)
SE (1) SE521771C2 (zh)

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CN101506391B (zh) * 2006-09-28 2011-09-14 罗兹埃德公司 无缝地在径向轴向环轧机上制造的环的热机械处理方法
CN104668886A (zh) * 2013-11-01 2015-06-03 舍弗勒技术股份两合公司 一种加工大尺寸滚子的方法

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DE10209264B4 (de) 2002-03-01 2005-06-02 Ab Skf Verfahren zum Herstellen eines Bauteils aus Metall
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JP4712603B2 (ja) * 2006-04-28 2011-06-29 Ntn株式会社 転動部品の製造方法、軌道輪および軸受
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CN101886502A (zh) * 2009-05-13 2010-11-17 陈敬生 门铰组件的制造工艺及此工艺获得的门铰组件
CN110257710A (zh) * 2019-07-05 2019-09-20 常州市中宇合金轧辊厂 一种扎制高速钢轨用模具钢轧辊及其加工工艺

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CN101506391B (zh) * 2006-09-28 2011-09-14 罗兹埃德公司 无缝地在径向轴向环轧机上制造的环的热机械处理方法
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CN104668886A (zh) * 2013-11-01 2015-06-03 舍弗勒技术股份两合公司 一种加工大尺寸滚子的方法

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US6176948B1 (en) 2001-01-23
SE9800859D0 (sv) 1998-03-16
JP3372219B2 (ja) 2003-01-27
DE69928463D1 (de) 2005-12-29
SE521771C2 (sv) 2003-12-02
EP0943694A1 (en) 1999-09-22
EP0943694B1 (en) 2005-11-23
JPH11309630A (ja) 1999-11-09
DE69928463T2 (de) 2006-08-17
SE9800859L (sv) 1999-09-17
CN1131116C (zh) 2003-12-17

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