AU2007294317B2 - Steel, and processing method for the production of higher-strength fracture-splittable machine components - Google Patents
Steel, and processing method for the production of higher-strength fracture-splittable machine components Download PDFInfo
- Publication number
- AU2007294317B2 AU2007294317B2 AU2007294317A AU2007294317A AU2007294317B2 AU 2007294317 B2 AU2007294317 B2 AU 2007294317B2 AU 2007294317 A AU2007294317 A AU 2007294317A AU 2007294317 A AU2007294317 A AU 2007294317A AU 2007294317 B2 AU2007294317 B2 AU 2007294317B2
- Authority
- AU
- Australia
- Prior art keywords
- component
- steel
- fracture
- separable
- forming temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
Abstract
The invention relates to a steel and a processing method for higher-strength fracture-splittable machine components that are composed of at least two fracture-splittable parts. Said steel and method are characterized in that the chemical composition of the steel (expressed in percent by weight) is as follows: 0.40% ≤ C ≤ 0.60%; 0.20% ≤ Si ≤ 1.00%; 0.50% ≤ Mn ≤ 1.50%; 0% ≤ Cr ≤ 1.00%; 0% ≤ Ni ≤ 0.50%; 0% ≤ Mo ≤ 0.20%; 0% ≤ Nb ≤ 0.050%; 0% ≤ V ≤ 0.30%; 0% ≤ Al ≤ 0.05%; 0.005% ≤ N ≤ 0.020%, the rest being composed of iron and smelting-related impurities and residual matter.
Description
Steel and processing method for the manufacture of high strength, fracture-splittable machinery components. The invention concerns a steel and the processing method for the manufacture of high strength, fracture-separable machinery components. This material was developed, for example, for the manufacture of crack connecting rods. The steel must be suitable for forging or for other heat forming processes. The heat used in the forging is dissipated by controlled cooling to produce a largely pearlitic structure that has an apparent limit of elasticity in excess of 750 N/mm 2 , a tensile strength between 1000 and 1200 N/mm 2 , elongation to fracture of over 10% and reduction in area at fracture of over 25%. Its fracture-separability is a particularly important feature. The desired properties can be obtained by intentionally creating a pearlitic structure with the precipitation of special carbides (niobium and vanadium carbide) and of manganese sulphides by an appropriately formulated chemical composition, controlled temperature management during the heat forming when producing the preliminary material as well as when forging the finished components (thermomechanical treatment), and a suitable heat treatment after completion of the forging or heat forming, as the case may be. Up to now, examples of the steels used for this purpose are either mostly eutectoid compositions with approximately 0.7% C, 0.5 to 0.9% Mn, 0.06 to 0.07% S and possibly 0.1 to 0.2% V (C70S6, 70MnVS4), or an average carbon content of approximately 0.4%, about 1% Mn, 0.06 to 0.07% S and about 0.3% V (36MnVS4) according to customers' technical specifications. 806400_2 (GHMatters) P80168 AU 2 These steels have a predominantly pearlitic structure with vanadium carbides and manganese sulphides and conform to requirements regarding mechanical properties. The drawbacks in the various known material alternatives are that the versions used to this point need considerable resources in terms of expensive and scarce alloying materials. Vanadium in particular is currently used increasingly in the field of precipitation hardening ferritic-pearlitic steels (AFP steels), making vanadium an increasingly scarce commodity. A new steel is proposed which has favourable mechanical properties regarding strength (and fatigue strength) and, additionally, good toughness characteristics in tensile tests, combined at the same time with good splittability. The steel can also be continuously cast and forged. Furthermore, the new steel may use fewer resources when being produced than known steels, by partially substituting the vanadium content with niobium and subsequently using an appropriately adapted forming and cooling strategy. The high value for the apparent limit of elasticity is achieved, other than with the basic composition, by the precipitation of extremely finely dispersed carbides of special carbide formers niobium and vanadium. This requires a solution of the present carbides before the final hot forming process as well as controlled temperature management during the hot forming, followed by a final cooling off stage. Finely dispersed precipitation can be achieved, in particular, by having a low final forming temperature, ending with slightly accelerated cooling. This raises the apparent limit of elasticity in particular, thus improving the elastic limit ratio considerably. The tensile strength value of the basic composition comprising 0.5% C, 0.6% Si, 1.0% Mn, 0.23% Cr, 0.2% Ni and 0.14% V can be adjusted to the desired level by slightly accelerated cooling after hot forming. The toughness characteristic values are controlled, in particular, by selective alloying with 0.06 to 0.07% sulphur. The carbon content and relatively high nitrogen content also act positively in this regard. 08400_2 (GHMatters) P80168.AU 3 A crystalline fracture or macroscopic deformation is essential for the material to split properly. This is achieved by designing the alloy with high contents of carbon, nitrogen and sulphur, and comparatively low contents of chromium, nickel and molybdenum. There is currently disclosed a steel for the manufacture of fracture-splittable components for the vehicle industry with the following chemical composition in percentages by weight: 0.45% 5 C 5 0.55%; 0.50% 5 Si 5 0.70%; 0.90% s Mn 5 1.10%; 0.10% sCr S 0.40%; 0.10% s Ni s 0.30%; 0% s Mo s 0.2%; 0.020% 5 Nb 5 0.030%; 0.10% 5 V s 0.20%; 0.010% 5 Al 5 0.020%; 0.010% s N 5 0.020% whereby the remainder consists of iron and impurities from the melting process. 606400.2 (GHMatters) PSO1O.AU
Claims (11)
1. Steel for manufacture of high strength, fracture-separable machinery components, having at least two fracture-separable parts, wherein the steel has the following chemical composition in percentages by weight: 0.45% 5 C s 0.55% 0.50% 5 Si s 0.70% 0.90% 5 Mn s 1.10% 0.10% s Cr s 0.40% 0.10% 5 Ni 5 0.30% 0% 5 Mo 5 0.20% 0.020% 5 Nb 5 0.030% 0.10% s Vs 0.20% 0.010% 5 Al 5 0.020% 0.010% 5 N s 0.020% whereby the remainder consists of iron and impurities from the melting process and residues.
2. A steel as claimed in claim 1, further comprising, by weight percent: 0.020% 5 Ti 5 0.030% 606400_2 (GHMatters) P8018$.AU 5
3. A steel as claimed in claim 1, wherein the chemical composition is the same except that: 0.30% 5 Cr 5 0.40% 0.10% 5 Ni 5 0.20% 0.015% 5 N s 0.020%
4. A fracture-separable component for use in constructing a vehicle, comprising a steel having the following chemical composition in percentages by weight: 0.45% s C s 0.55% 0.50% 5 Si 5 0.70% 0.90% 5 Mn 5 1.10% 0.10% 5 Cr s 0.40% 0.10% S Ni s 0.30% 0% s Mo 5 0.20% 0.10% s V 0.20% 0.010% s Als 0.020% 0.020% 5 Nb s 0.030% 0.010% s N:s 0.020% whereby the remainder consists of iron and impurities from the melting process and residues and whereby the component has predominantly pearlitic structure from the precipitation of vanadium-and N iobium-carbides after forging and controlled cooling.
5. The component as claimed in claim 4, wherein the apparent limit of elasticity is over 750 N/mm 2 after cooling down from the forming temperature.
6. The component as claimed in claim 4, wherein the tensile strength falls between 950 N/mm 2 and 1200 N/mm 2 after cooling down from the forming temperature. 800400_2 (GHMatters) P80168.AU 6
7. The component as claimed in claim 6, wherein the elongation to fracture exceeds 10% after cooling down from the forming temperature.
8. The component as claimed in claim 7, wherein the reduction in area at fracture exceeds 25% after cooling down from the forming temperature.
9. The component as claimed in claim 8, wherein it is fracture -separable.
10. The component as claimed in claim 9, wherein it is suitable for induction hardening.
11. The component as claimed in claim 10, wherein the mechanical properties can be adjusted both in the material prior to forging as well as in the component through the use of thermomechanical treatment. 50400_2 (GHMatters) P80168.AU
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006041146A DE102006041146A1 (en) | 2006-09-01 | 2006-09-01 | Steel and processing methods for the manufacture of high-strength fracture-breakable machine components |
DE102006041146.3 | 2006-09-01 | ||
PCT/DE2007/001337 WO2008028447A1 (en) | 2006-09-01 | 2007-07-27 | Steel, and processing method for the production of higher-strength fracture-splittable machine components |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2007294317A1 AU2007294317A1 (en) | 2008-03-13 |
AU2007294317B2 true AU2007294317B2 (en) | 2011-10-13 |
Family
ID=38989625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2007294317A Ceased AU2007294317B2 (en) | 2006-09-01 | 2007-07-27 | Steel, and processing method for the production of higher-strength fracture-splittable machine components |
Country Status (15)
Country | Link |
---|---|
US (1) | US20100186855A1 (en) |
EP (1) | EP2057298B1 (en) |
JP (1) | JP2010501733A (en) |
KR (1) | KR20090049591A (en) |
CN (1) | CN101542007A (en) |
AR (1) | AR062184A1 (en) |
AU (1) | AU2007294317B2 (en) |
BR (1) | BRPI0716206A2 (en) |
CA (1) | CA2666677A1 (en) |
DE (1) | DE102006041146A1 (en) |
MX (1) | MX2009001971A (en) |
RU (1) | RU2441093C2 (en) |
TW (1) | TW200825188A (en) |
WO (1) | WO2008028447A1 (en) |
ZA (1) | ZA200900848B (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3168319B1 (en) * | 2014-07-08 | 2020-12-16 | Sidenor Investigación y Desarrollo, S.A. | Microalloyed steel for heat-forming high-resistance and high-yield-strength parts |
CN105543651B (en) * | 2015-12-21 | 2017-11-17 | 武钢集团昆明钢铁股份有限公司 | It is a kind of to be used to manufacture hydropower generator rotating shaft, the forging steel molten steel of hinge and its smelting process |
CN107619995A (en) * | 2017-08-11 | 2018-01-23 | 江阴兴澄特种钢铁有限公司 | A kind of major diameter engineering mechanical hydraulic oil cylinder piston rod round steel and its manufacture method |
EP3453777A1 (en) | 2017-09-08 | 2019-03-13 | Cemtas Celk Makina Sanayi Ve Ticaret Anonim Sirketi | High strength and fracture splittable micro alloyed steel |
CN108486472A (en) * | 2018-05-11 | 2018-09-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Containing V, Ti, N Micro Alloying pre-hardened plastic mold steel and preparation method thereof |
CN108504935A (en) * | 2018-05-11 | 2018-09-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Containing V, N Micro Alloying pre-hardened plastic mold steel and preparation method thereof |
CN108546879A (en) * | 2018-05-11 | 2018-09-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Containing V, Nb Micro Alloying pre-hardened plastic mold steel and preparation method thereof |
CN108624815A (en) * | 2018-05-11 | 2018-10-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Containing V, Nb, Ti Micro Alloying pre-hardened plastic mold steel and preparation method thereof |
CN108504934A (en) * | 2018-05-11 | 2018-09-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Containing V, Nb, N Micro Alloying pre-hardened plastic mold steel and preparation method thereof |
CN110284055A (en) * | 2019-06-17 | 2019-09-27 | 威海津恒科技有限公司 | A kind of wear resistant automobile stamping part die and preparation method thereof |
KR20220081375A (en) | 2019-11-18 | 2022-06-15 | 아르셀러미탈 | Steel forged parts and their manufacturing method |
TR201921217A2 (en) | 2019-12-24 | 2021-07-26 | Tirsan Kardan Sanayi Ve Ticaret Anonim Sirketi | High strength, low alloy steel composition |
CN111235487B (en) * | 2020-03-23 | 2021-08-31 | 马鞍山钢铁股份有限公司 | Steel for long-life drill rod and production method thereof |
CN114058943A (en) * | 2021-09-14 | 2022-02-18 | 武汉钢铁有限公司 | Microalloyed steel and manufacturing method thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0035681A1 (en) * | 1980-03-12 | 1981-09-16 | Thyssen Edelstahlwerke AG | Use of a steel having high strength and toughness |
JPH01176055A (en) * | 1987-12-28 | 1989-07-12 | Kawasaki Steel Corp | Non-heat treated steel for hot forging having excellent machinability |
JPH04191348A (en) * | 1990-11-24 | 1992-07-09 | Daido Steel Co Ltd | Non-heattreated steel with high toughness |
US5769970A (en) * | 1995-12-14 | 1998-06-23 | Ascometal (Societe Anonyme) | Steel for the manufacture of separable mechanical components and separable mechanical component |
EP1051531A1 (en) * | 1998-01-28 | 2000-11-15 | Ascometal | Steel and method for making cleavable mechanical parts |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0856590B2 (en) * | 1997-02-04 | 2005-12-28 | Daido Tokushuko Kabushiki Kaisha | High strength non-thermal refining steel for hot forging |
JP5023410B2 (en) * | 2001-03-02 | 2012-09-12 | 大同特殊鋼株式会社 | Non-tempered steel for hot forging with easy fracture separation |
JP3893889B2 (en) * | 2001-03-21 | 2007-03-14 | 大同特殊鋼株式会社 | Non-tempered steel for hot forging that can be easily separated by fracture |
JP2003193184A (en) * | 2001-12-28 | 2003-07-09 | Kobe Steel Ltd | Broken-split type connecting rod and steel therefor |
JP4346404B2 (en) * | 2002-11-20 | 2009-10-21 | 本田技研工業株式会社 | Non-heat treated steel for fracture separation at low temperature and fitting member made of this non-heat treated steel |
-
2006
- 2006-09-01 DE DE102006041146A patent/DE102006041146A1/en not_active Withdrawn
-
2007
- 2007-06-23 TW TW096122683A patent/TW200825188A/en unknown
- 2007-07-27 MX MX2009001971A patent/MX2009001971A/en active IP Right Grant
- 2007-07-27 AU AU2007294317A patent/AU2007294317B2/en not_active Ceased
- 2007-07-27 RU RU2009111860/02A patent/RU2441093C2/en not_active IP Right Cessation
- 2007-07-27 CA CA002666677A patent/CA2666677A1/en not_active Abandoned
- 2007-07-27 JP JP2009525910A patent/JP2010501733A/en active Pending
- 2007-07-27 WO PCT/DE2007/001337 patent/WO2008028447A1/en active Application Filing
- 2007-07-27 US US12/310,588 patent/US20100186855A1/en not_active Abandoned
- 2007-07-27 KR KR1020097003628A patent/KR20090049591A/en not_active Application Discontinuation
- 2007-07-27 BR BRPI0716206-5A2A patent/BRPI0716206A2/en not_active IP Right Cessation
- 2007-07-27 CN CNA2007800319547A patent/CN101542007A/en active Pending
- 2007-07-27 EP EP07801178A patent/EP2057298B1/en active Active
- 2007-08-02 AR ARP070103409A patent/AR062184A1/en not_active Application Discontinuation
-
2009
- 2009-02-05 ZA ZA200900848A patent/ZA200900848B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0035681A1 (en) * | 1980-03-12 | 1981-09-16 | Thyssen Edelstahlwerke AG | Use of a steel having high strength and toughness |
JPH01176055A (en) * | 1987-12-28 | 1989-07-12 | Kawasaki Steel Corp | Non-heat treated steel for hot forging having excellent machinability |
JPH04191348A (en) * | 1990-11-24 | 1992-07-09 | Daido Steel Co Ltd | Non-heattreated steel with high toughness |
US5769970A (en) * | 1995-12-14 | 1998-06-23 | Ascometal (Societe Anonyme) | Steel for the manufacture of separable mechanical components and separable mechanical component |
EP1051531A1 (en) * | 1998-01-28 | 2000-11-15 | Ascometal | Steel and method for making cleavable mechanical parts |
Also Published As
Publication number | Publication date |
---|---|
DE102006041146A1 (en) | 2008-03-06 |
RU2441093C2 (en) | 2012-01-27 |
BRPI0716206A2 (en) | 2013-11-12 |
AU2007294317A1 (en) | 2008-03-13 |
CN101542007A (en) | 2009-09-23 |
EP2057298B1 (en) | 2012-11-14 |
CA2666677A1 (en) | 2008-03-13 |
KR20090049591A (en) | 2009-05-18 |
US20100186855A1 (en) | 2010-07-29 |
ZA200900848B (en) | 2009-12-30 |
AR062184A1 (en) | 2008-10-22 |
EP2057298A1 (en) | 2009-05-13 |
JP2010501733A (en) | 2010-01-21 |
RU2009111860A (en) | 2010-10-10 |
TW200825188A (en) | 2008-06-16 |
WO2008028447A1 (en) | 2008-03-13 |
MX2009001971A (en) | 2009-03-09 |
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Legal Events
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FGA | Letters patent sealed or granted (standard patent) | ||
MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |