WO2002063050A1 - Verfahren zur herstellung einer kette - Google Patents
Verfahren zur herstellung einer kette Download PDFInfo
- Publication number
- WO2002063050A1 WO2002063050A1 PCT/DE2002/000089 DE0200089W WO02063050A1 WO 2002063050 A1 WO2002063050 A1 WO 2002063050A1 DE 0200089 W DE0200089 W DE 0200089W WO 02063050 A1 WO02063050 A1 WO 02063050A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chain
- steel
- temperature
- heat treatment
- tempering
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0087—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for chains, for chain links
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
Definitions
- the invention relates to a method for producing a chain, in particular a round steel chain from a tempered steel.
- Chains are pulling, driving or conveying elements made up of individual links.
- link chains the individual links of which mesh with one another and articulated chains, the individual links of which are connected in a plane so that they can rotate by means of bolts.
- Link chains are manufactured industrially from drawn wires or rolled round steels. One therefore speaks of round steel chains. These are used for lifting and moving loads as well as for securing loads and for conveying bulk goods. Because of their mobility, they are particularly well suited for use in underground coal mining.
- the requirements for the materials used are essentially characterized by the interaction of high strengths (hardness) with minimum values for the impact energy. This is intended to Wear resistance and break resistance under operational stress can be guaranteed.
- the currently applicable steel standard for welded round steel chains is DIN 17115 from 1987. This concerns stainless steel with prescribed levels of manganese, chromium, nickel and molybdenum as well as limited values for phosphorus and sulfur.
- the narrow analysis limits as well as the regulations regarding the mechanical-technological values should ensure a high level of uniformity of the finished chains.
- Modified materials can be used for special purposes. Vanadium, tungsten or titanium, for example, are used as additional alloying elements.
- the steels are usually tempered in the temperature range around 500 ° C.
- Tensile strengths of up to 1,250 MPa are set in connection with impact strength values of at least 60 J.
- the chain is calibrated in a stretching process.
- the required chain geometry is set and the accuracy of fit, in particular as regards the interaction of the chain with drive wheels, is improved.
- the improvement of the chain through calibration goes hand in hand with work hardening and a drop in notch impact capacity. Strain hardening is much more pronounced with higher-strength chains than with standard chains. The loss of about 10 J to 15 J impact energy in the higher-strength chains and the associated susceptibility to brittle fractures are problematic for operational use.
- the invention is therefore based on the object of demonstrating a method for producing a chain which achieves a tensile strength R m of more than 1,550 MPa and a notched bar impact energy A v of at least 55 J.
- this object is achieved in a method according to the measures of claim 1.
- a chain strand made of chain links from a tempering steel is manufactured in a conventional manner and subjected to the usual heat treatment with normalization, hardening and tempering. Starting takes place at a low temperature level below 200 ° C.
- the tempering temperature is preferably 190 ° C.
- a tempered steel is used, the structure of which contains stable residual austenite in a content between 3% and 10% after hardening and tempering.
- the chain strand is subjected to a post-heat treatment at a temperature between 190 ° C and 250 ° C.
- the post-heat treatment is preferably carried out at a temperature between 210 ° C. and 240 ° C., in particular at approximately 230 ° C.
- the heat treatment provided according to the invention reduces the stresses from the final calibration process. Although this reduces the tensile strength and the yield strength, the impact energy A v increases to values above 55 J.
- the tensile strength R m is above 1,550 MPa despite the decrease due to the heat pretreatment.
- the toughness reserve is drawn from the above-mentioned residual austenite, which leads to an increase in the impact energy during the post-heat treatment process.
- the invention consequently turns away from the teaching that austenite should be avoided in steel because it is very troublesome in conventional tempered steels, since this results in a drop in strength.
- a normalization with a temperature T N between 900 ° C and 1100 ° C takes place during the heat treatment in the course of the manufacture of the chain. This is followed by cooling in air.
- the chain strand is then hardened at a temperature T H between 900 ° C and 1,000 ° C, followed by water quenching.
- the tempering is carried out at a temperature T A between 180 ° C and 200 ° C with a holding time of usually four hours and a cooling in air.
- the main calibration is carried out before the final heat treatment (compensation). After tempering, a recalibration and the adjustment of the final chain geometry is carried out. Any dimensional distortion that may be caused during the hardening process is eliminated. This is followed by the post-heat treatment.
- the post-heat treatment not only leads to an increase in the impact energy, but also to a decrease in the elastic modulus of the chain. This makes the chain softer in its spring properties. This has advantages in practice, particularly in underground mining, because with increasing face length, longer and longer chains are used, which are correspondingly sensitive to vibrations.
- the soft spring properties of a chain manufactured by the method according to the invention contribute to a compensation of the vibrations.
- the composition of an advantageous tempering steel is specified in claim 4.
- a steel alloy is then used, which is expressed in percentages by weight between 0.20% and 0.27% carbon (C), between 1.90% and 2.00% chromium (Cr), between 1.30% and 1.70% manganese (Mn) with copper (Cu) between 0.20 %% to 0.50%, nickel (Ni) between 0.15% and 0.40%, aluminum (AI) to 0.03%, molybdenum (Mo ) to 0.05%, titanium components (Ti) to 0.04%, niobium components (Nb) to 0.04% and silicon components (Si) to 0.05%, the phosphorus component being less than 0.01% and the nitrogen component ( N) is less than 0.02%.
- the copper content (Cu) is preferably between 0.45% and 0.50%.
- the proportion of nickel is also preferably at the upper limit of the analysis range, for example 0.35% to 0.40%.
- a tempering steel is considered to be particularly advantageous, the chemical composition of which is expressed as mass parts in percent (%): 0.23 C, 0.05 Si, 1, 50 Mn, ⁇ 0.01 P, ⁇ 0.004 S, 1, 95 Cr, 0.37 Ni, 0.02 Mo, 0.028 AI, 0.5 Cu, 0.02 Ti, 0.024 Nb, 0.0105 N.
- a chain made from such tempering steel is preferably tempered during the heat treatment at a temperature T A of approximately 190 ° C., the post-heat treatment being carried out at a temperature T N of approximately 210 ° C.
- T A tensile strengths
- T N tensile strengths
- R m tensile strengths
- impact strength values A v between 55 J and 65 J.
- continuous vibration tests over 1,000,000 load changes were achieved.
- the steel alloy used consists in percentages by weight of 0.18% to 0.24% carbon (C), 1.60% to 1.80% chromium (Cr), 0.75% to 1.00% manganese (Mn), 0.50% to 0.85% nickel (Ni), 0.20% to 0.30% molybdenum (Mo), 0.01% to 0.10% titanium (Ti), 0.20% to 0.40 % Silicon (Si), 0.015% to 0.03% aluminum (AI) and 0.001% to 0.0035% boron (B).
- the phosphorus content (P) is below 0.025% and the nitrogen content (N) is not higher than 0.010%, in particular less than 0.003%.
- the rest is formed by iron (Fe) including impurities due to melting.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002234501A AU2002234501B2 (en) | 2001-02-08 | 2002-01-15 | Method for producing a chain |
US10/638,129 US6782689B1 (en) | 2001-02-08 | 2003-08-08 | Method of making a chain |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10105809A DE10105809C1 (de) | 2001-02-08 | 2001-02-08 | Verfahren zur Herstellung einer Kette, insbesondere einer Rundstahlkette aus Vergütungsstahl |
DE10105809.8 | 2001-02-08 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/638,129 Continuation US6782689B1 (en) | 2001-02-08 | 2003-08-08 | Method of making a chain |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002063050A1 true WO2002063050A1 (de) | 2002-08-15 |
Family
ID=7673338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/000089 WO2002063050A1 (de) | 2001-02-08 | 2002-01-15 | Verfahren zur herstellung einer kette |
Country Status (4)
Country | Link |
---|---|
US (1) | US6782689B1 (de) |
AU (1) | AU2002234501B2 (de) |
DE (1) | DE10105809C1 (de) |
WO (1) | WO2002063050A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102534171A (zh) * | 2011-12-02 | 2012-07-04 | 中煤张家口煤矿机械有限责任公司 | 高强度圆环链单环热处理中的自回火方法 |
CN105643208A (zh) * | 2016-01-18 | 2016-06-08 | 南通洋口对外贸易有限公司 | 一种适用于海洋环境下的高强度圆环链的生产工艺 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101397636B (zh) * | 2007-09-25 | 2010-12-01 | 宝山钢铁股份有限公司 | 一种高强韧性矿用圆环链用钢及其制造方法 |
CN103231206A (zh) * | 2013-03-31 | 2013-08-07 | 安徽省巢湖银环锚链有限责任公司 | 一种深海钻井平台r4级系泊链生产工艺 |
TWI750068B (zh) * | 2021-03-24 | 2021-12-11 | 岳盟企業股份有限公司 | 包含齒形鏈片的鏈條 |
CN113084077B (zh) * | 2021-04-13 | 2022-09-30 | 北京华海基业机械设备有限公司 | 一种链条的生产工艺 |
CN115704074B (zh) * | 2021-08-11 | 2024-01-09 | 宝山钢铁股份有限公司 | 一种矿用链条钢、链条及其制造方法 |
CN114657334B (zh) * | 2022-03-25 | 2023-11-17 | 西宁特殊钢股份有限公司 | 兼具组织控制和硬度控制的矿用圆环链钢23MnNiMoCr54的退火工艺 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2139115A1 (de) * | 1971-08-04 | 1973-02-15 | Carl Clarus | Rundglieder-hochleistungskette |
US3830054A (en) * | 1971-09-21 | 1974-08-20 | Hitachi Ltd | Link chains for motor blocks |
DE2844848A1 (de) * | 1978-10-14 | 1980-04-30 | Kloeckner Humboldt Deutz Ag | Verfahren zur behandlung von aus stahl hergestellten kolben |
WO2000068443A2 (de) * | 1999-05-10 | 2000-11-16 | Mannesmannröhren-Werke Ag | Verfahren zur herstellung von geschweissten stahlrohren hoher festigkeit, zähigkeits- und verformungseigenschaften |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI56879C (fi) * | 1969-04-25 | 1980-04-10 | Rud Ketten Rieger & Dietz | Kedjelaos |
DE2127493A1 (de) * | 1971-05-28 | 1972-12-07 | Hermann Pautze & Co Maschinenfabrik, 1000 Berlin | Elektronisch gesteuerte Einrichtung zum Bedrucken von Wertkarten |
DE2236349A1 (de) * | 1972-07-25 | 1974-02-07 | Erlau Ag Eisen Drahtwerk | Kettenglied fuer gleitschutz- und reifenschutzketten |
US4106542A (en) * | 1974-08-21 | 1978-08-15 | Dome Inventions (Proprietary) Limited | Tire protective chains |
SE430424B (sv) * | 1981-11-24 | 1983-11-14 | Uddeholms Ab | Ketting |
DE3223871A1 (de) | 1982-06-25 | 1984-01-05 | Siemens AG, 1000 Berlin und 8000 München | Daempfungseinrichtung an einer schreibfeder eines registriergeraetes |
DE3410220C2 (de) * | 1984-03-16 | 1986-10-30 | Rud-Kettenfabrik Rieger & Dietz Gmbh U. Co, 7080 Aalen | Reifenkette |
US4660611A (en) * | 1985-07-31 | 1987-04-28 | Cooper Industries | Tire chain |
DE19806719A1 (de) * | 1997-03-20 | 1998-10-01 | Dbt Gmbh | Antriebskette, insbesondere zur Verwendung bei Bergbaumaschinen |
DE19821674C1 (de) * | 1998-05-14 | 2000-02-24 | Thiele Gmbh & Co Kg | Verfahren zur Ausbildung eines vergüteten Kettenglieds und Kettenglied |
DE19828048C2 (de) * | 1998-06-24 | 2000-08-03 | Thiele Gmbh & Co Kg | Verwendung einer nickel-martensitaushärtenden Stahllegierung für Ketten und Kettenbauteile |
-
2001
- 2001-02-08 DE DE10105809A patent/DE10105809C1/de not_active Revoked
-
2002
- 2002-01-15 AU AU2002234501A patent/AU2002234501B2/en not_active Ceased
- 2002-01-15 WO PCT/DE2002/000089 patent/WO2002063050A1/de not_active Application Discontinuation
-
2003
- 2003-08-08 US US10/638,129 patent/US6782689B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2139115A1 (de) * | 1971-08-04 | 1973-02-15 | Carl Clarus | Rundglieder-hochleistungskette |
US3830054A (en) * | 1971-09-21 | 1974-08-20 | Hitachi Ltd | Link chains for motor blocks |
DE2844848A1 (de) * | 1978-10-14 | 1980-04-30 | Kloeckner Humboldt Deutz Ag | Verfahren zur behandlung von aus stahl hergestellten kolben |
WO2000068443A2 (de) * | 1999-05-10 | 2000-11-16 | Mannesmannröhren-Werke Ag | Verfahren zur herstellung von geschweissten stahlrohren hoher festigkeit, zähigkeits- und verformungseigenschaften |
Non-Patent Citations (1)
Title |
---|
K.H. SOLLE: "Betriebsergebnisse an Stählen für hochfeste Hebezeugketten", NEUE HÜTTE, vol. 26, no. 9, September 1981 (1981-09-01), Berlin, pages 345 - 347, XP002200393 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102534171A (zh) * | 2011-12-02 | 2012-07-04 | 中煤张家口煤矿机械有限责任公司 | 高强度圆环链单环热处理中的自回火方法 |
CN105643208A (zh) * | 2016-01-18 | 2016-06-08 | 南通洋口对外贸易有限公司 | 一种适用于海洋环境下的高强度圆环链的生产工艺 |
CN105643208B (zh) * | 2016-01-18 | 2019-03-12 | 南通洋口对外贸易有限公司 | 一种适用于海洋环境下的高强度圆环链的生产工艺 |
Also Published As
Publication number | Publication date |
---|---|
AU2002234501B2 (en) | 2004-05-20 |
DE10105809C1 (de) | 2002-07-18 |
US6782689B1 (en) | 2004-08-31 |
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