EP0095470A1 - Verfahren zum mindestens teilweisen, isothermen bainitisieren von werkstücken aus guss-eisenwerstoffen - Google Patents
Verfahren zum mindestens teilweisen, isothermen bainitisieren von werkstücken aus guss-eisenwerstoffenInfo
- Publication number
- EP0095470A1 EP0095470A1 EP82903445A EP82903445A EP0095470A1 EP 0095470 A1 EP0095470 A1 EP 0095470A1 EP 82903445 A EP82903445 A EP 82903445A EP 82903445 A EP82903445 A EP 82903445A EP 0095470 A1 EP0095470 A1 EP 0095470A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bath
- temperature
- cooling
- intercooling
- workpiece
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract 2
- 239000002184 metal Substances 0.000 claims abstract 4
- 229910052751 metal Inorganic materials 0.000 claims abstract 4
- 238000001816 cooling Methods 0.000 claims description 23
- 229910001563 bainite Inorganic materials 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims 2
- 238000002844 melting Methods 0.000 claims 2
- 150000002739 metals Chemical class 0.000 claims 2
- 150000003839 salts Chemical class 0.000 claims 2
- 229910001566 austenite Inorganic materials 0.000 claims 1
- 238000010586 diagram Methods 0.000 claims 1
- 229910001562 pearlite Inorganic materials 0.000 description 7
- KKEBXNMGHUCPEZ-UHFFFAOYSA-N 4-phenyl-1-(2-sulfanylethyl)imidazolidin-2-one Chemical compound N1C(=O)N(CCS)CC1C1=CC=CC=C1 KKEBXNMGHUCPEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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
- C21D5/00—Heat treatments of cast-iron
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
Definitions
- the present invention relates to a method for at least partially, isothermally bainizing workpieces made of cast iron materials / and to its use for workpieces which would be produced in a fully pearlitic manner due to their insufficient cooling speed over the cross section.
- the hitherto known bainite tempering methods are based on a critical cooling speed which results from the temperature gradient between the austenitizing and cooling bath and the workpiece diameter.
- the temperature of the intercooling bath is adapted to the relevant wall thickness of the workpiece.
- the cooling rates can be controlled so that even thicker wall thicknesses do not undergo pearlite transformation, at least in the peripheral zones.
- a component with a wall thickness of approx. 30 mm made of unalloyed GGG was austenitized at approx. 900 C and then quenched in an intermediate cooling bath at 240 C. The component is then placed on a
- HHaalltteetteemmppeerraattuu r transferred from 380 C and bainite hardened.
- the desired bainitic structure with the known advantageous mechanical properties results at least partially over the cross section of the workpiece.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH7726/81 | 1981-12-03 | ||
| CH7726/81A CH648350A5 (de) | 1981-12-03 | 1981-12-03 | Verfahren zum isothermen bainitisieren von werkstuecken aus eisenwerkstoffen. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0095470A1 true EP0095470A1 (de) | 1983-12-07 |
Family
ID=4329552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82903445A Withdrawn EP0095470A1 (de) | 1981-12-03 | 1982-12-02 | Verfahren zum mindestens teilweisen, isothermen bainitisieren von werkstücken aus guss-eisenwerstoffen |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0095470A1 (pt) |
| BR (1) | BR8208004A (pt) |
| CA (1) | CA1210672A (pt) |
| CH (1) | CH648350A5 (pt) |
| IT (1) | IT1153659B (pt) |
| WO (1) | WO1983001959A1 (pt) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2590508B1 (fr) * | 1985-11-27 | 1988-06-24 | Pont A Mousson | Procede d'obtention de pieces moulees en fonte a graphite spheroidal et fonte obtenue par ce procede |
| IT1216347B (it) * | 1986-11-20 | 1990-02-22 | Necchi Spa | Procedimento per ottenere getti in ghisa sferoidale bainitica |
| FR2697535B1 (fr) * | 1992-11-02 | 1995-01-13 | Schissler Jean Marie | Procédé amélioré de traitement thermique d'alliages ferreux ou non-ferreux, et son application à l'élaboration de fonte bainitique. |
| DE4313569C1 (de) * | 1993-04-26 | 1994-05-26 | Daimler Benz Ag | Verfahren zum Härten von Kugelgraphitgußeisenteilen |
| SE510344C2 (sv) * | 1997-08-01 | 1999-05-17 | Ovako Steel Ab | Sätt för fullständig bainithärdning av stål |
| DE102006059050A1 (de) * | 2006-12-14 | 2008-06-19 | Schaeffler Kg | Verfahren zur Wärmebehandlung von Wälzlagerbauteilen aus durchgehärtetem, bainitischem Wälzlagerstahl |
| CN104294014B (zh) * | 2013-07-18 | 2016-12-28 | 首都航天机械公司 | 中碳硅锰铬镍系低合金钢的贝氏体等温热处理方法 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB601588A (en) * | 1943-07-06 | 1948-05-10 | Charles Greiner Purnell | Improvements in and relating to heat treatment of hardenable steel |
| US2258566A (en) * | 1940-07-30 | 1941-10-07 | American Steel & Wire Co | Hardenable steel heat treatment |
| DE872956C (de) * | 1943-08-28 | 1953-04-09 | Deutsche Edelstahlwerke Ag | Zwischenstufenverguetung von unlegierten und legierten Staehlen |
| DE2054416C3 (de) * | 1970-11-05 | 1974-09-05 | Gesellschaft Zur Foerderung Der Eisenhuettentechnik Mbh, 4000 Duesseldorf | Verfahren zur Wärmebehandlung von Vergütungsstählen |
| US3860457A (en) * | 1972-07-12 | 1975-01-14 | Kymin Oy Kymmene Ab | A ductile iron and method of making it |
| US3784416A (en) * | 1972-09-29 | 1974-01-08 | Canron Ltd | Manufacture of white cast iron |
| FR2358465A1 (fr) * | 1976-07-13 | 1978-02-10 | Bochumer Eisen Heintzmann | Procede et dispositif pour fabriquer des segments de profile d'acier utilises pour le soutenement de galeries souterraines |
| DE2853870A1 (de) * | 1978-12-13 | 1980-07-03 | Schmidt Gmbh Karl | Gusseisen mit kugelgraphit mit austenitisch-bainitischem mischgefuege |
-
1981
- 1981-12-03 CH CH7726/81A patent/CH648350A5/de not_active IP Right Cessation
-
1982
- 1982-11-23 IT IT24385/82A patent/IT1153659B/it active
- 1982-12-02 WO PCT/CH1982/000126 patent/WO1983001959A1/de not_active Ceased
- 1982-12-02 BR BR8208004A patent/BR8208004A/pt unknown
- 1982-12-02 EP EP82903445A patent/EP0095470A1/de not_active Withdrawn
- 1982-12-02 CA CA000416913A patent/CA1210672A/en not_active Expired
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8301959A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1153659B (it) | 1987-01-14 |
| IT8224385A0 (it) | 1982-11-23 |
| WO1983001959A1 (fr) | 1983-06-09 |
| CH648350A5 (de) | 1985-03-15 |
| IT8224385A1 (it) | 1984-05-23 |
| BR8208004A (pt) | 1983-10-18 |
| CA1210672A (en) | 1986-09-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19830715 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB LI NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 19850719 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HAUKE, WILHELM Inventor name: HORNUNG, KLAUS |