DE690710C - Process for improving the properties, especially hardness, strength and yield point, of iron and steel alloys - Google Patents
Process for improving the properties, especially hardness, strength and yield point, of iron and steel alloysInfo
- Publication number
- DE690710C DE690710C DE1931K0130117 DEK0130117D DE690710C DE 690710 C DE690710 C DE 690710C DE 1931K0130117 DE1931K0130117 DE 1931K0130117 DE K0130117 D DEK0130117 D DE K0130117D DE 690710 C DE690710 C DE 690710C
- Authority
- DE
- Germany
- Prior art keywords
- iron
- steel alloys
- strength
- chromium
- properties
- 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.)
- Expired
Links
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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
Verfahren zur Verbesserung der Eigenschaften, insbesondere der Härte, Festigkeit und Streckgrenze, von Eisen- und Stahllegierungen Es ist bekannt, daß in Eisen- und Stahllegierungen durch Kohlenstoff, Stickstoff, Sauerstoff, Kupfer, Wolfram, Molybdän, Titan oder Beryllium und durch eine geeignete Wärmebehandlung (Abkühlen mit anschließendem Anlassen) die sogenannte Ausscheidungshärtung hervorgerufen werden kann, die eine Verbesserung technisch wichtiger Eigenschaften, z. B. der Härte, Festigkeit und Streckgrenze, mit sich bringt.Process for improving the properties, in particular the hardness, Strength and Yield Strength, of Iron and Steel Alloys It is known that in iron and steel alloys through carbon, nitrogen, oxygen, copper, Tungsten, molybdenum, titanium or beryllium and through a suitable heat treatment (Cooling followed by tempering) caused the so-called precipitation hardening which can be an improvement of technically important properties, e.g. B. the Hardness, strength and yield strength.
Es hat sich nun gezeigt"daß außer den genannten Elementen auch die Elemente Tantal und Niob in der Lage sind, in Eisen- und Stahllegierungen eine Ausscheidungshärtung hervorzurufen. Um dieses Ziel zu erreichen, werden Eisen- oder Stahllegierungen, die etwa o,oi bis 8 % Tantal und/oder Niob enthalten, zunächst bei einer hohen Temperatur, z. B. zwischen etwa 7oo bis 1300° C, geglüht. Es folgt hierauf ein Ablöschen in Wasser, Öl oder Luft o. dgl. Ein daran anschließendes Anlassen, z. B. bei einer Temperatur zwischen etwa 2,50 bis 700° C, ruft dann eine merkliche Verbesserung der Eigenschaften, insbesondere der Härte, Zugfestigkeit und Streckgrenze, hervor. Es genügt jedoch häufig, insbesondere bei niedrigen Gehalten an Tantal oder Niob, bereits ein einfaches Anlassen ohne vorheriges Glühen und Ablöschen, um Ausscheidungshärtung-hervorzurufen. Es ist dies von besonderer Bedeutung für die Veredelung von Gußstücken durch Ausscheidungshärtung, da es aus praktischen Gründen häufig unmöglich-ist, Gußstücke zu glühen und anschließend abzuschrecken. Auch kann das Anlassen durch eine besonders langsame Abkühlung ersetzt werden.It has now been shown that, in addition to the elements mentioned, the elements tantalum and niobium are also able to induce precipitation hardening in iron and steel alloys % Tantalum and / or niobium, initially annealed at a high temperature, for example between about 700 to 1300 ° C. This is followed by quenching in water, oil or air or the like. B. at a temperature between about 2.50 to 700 ° C, then causes a noticeable improvement in the properties, in particular the hardness, tensile strength and yield point, but a simple one is often sufficient, especially with low tantalum or niobium contents Tempering without prior annealing and quenching to induce precipitation hardening This is of particular importance for the refinement of castings by precipitation hardening, since it is often impossible for practical reasons t annealing and then quenching castings. Tempering can also be replaced by particularly slow cooling.
So ergibt beispielsweise eine Stahllegierung mit etwa o,15 11, Kohlenstoff und 0,72 Tantal ;- Niob nach einem Abschrecken von 125o° C in Wasser eine Härte von etwa 21o Brinelleinheiten, die sich durch ein Anlassen bei 300° C auf etwa 285 Brinelleinheiten steigern läßt.For example, a steel alloy with about 0.15 11 carbon and 0.72 tantalum; - niobium, after quenching at 125 ° C in water, has a hardness of about 21o Brinel units, which increases to about 285 Brinel units when tempered at 300 ° C can increase.
Weiter wurde gefunden, daß sich d%e Ausscheidungshärtungsfähigkeit von tantal- oder niobhaltigen Eisen- und Stahllegierungen durch die erwähnte Wärmebehandlung noch steigern läßt, wenn die Legierungen noch weitere Elemente, wie Silicium, Mangan, Chrom, Nickel, Wolfram, Molybdän, Vanadium oder Kobalt, einzeln oder gemischt enthalten. Besonders günstig verhalten sich in dieser Beziehung mit Tantal oder Niob legierte chemisch- neutrale Chrom- oder Chromnickelstahl- bzw. Eisenlegierungen, z. B. solche mit einem Gehalt an Chrom von etwa 6 bis 40'/o, an Nickel von 25 bis o,5 °j0 und an Kohlenstoff bis i °l0.It has also been found that the precipitation hardening ability of tantalum or niobium-containing iron and steel alloys can be increased by the heat treatment mentioned if the alloys contain other elements such as silicon, manganese, chromium, nickel, tungsten, molybdenum, vanadium or cobalt , included individually or mixed. Chemically neutral chromium or chromium-nickel steel or iron alloys alloyed with tantalum or niobium, e.g. B. those with a chromium content of about 6 to 40 %, nickel from 25 to 0.5 ° j0 and carbon up to 10 °.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1931K0130117 DE690710C (en) | 1931-01-23 | 1931-01-23 | Process for improving the properties, especially hardness, strength and yield point, of iron and steel alloys |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1931K0130117 DE690710C (en) | 1931-01-23 | 1931-01-23 | Process for improving the properties, especially hardness, strength and yield point, of iron and steel alloys |
Publications (1)
Publication Number | Publication Date |
---|---|
DE690710C true DE690710C (en) | 1940-05-04 |
Family
ID=7247047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1931K0130117 Expired DE690710C (en) | 1931-01-23 | 1931-01-23 | Process for improving the properties, especially hardness, strength and yield point, of iron and steel alloys |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE690710C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3612966A1 (en) * | 1986-04-17 | 1987-10-22 | Franz Roth | Clamping fixture with handle - for foam-material sponge |
DE102008026154A1 (en) * | 2008-05-30 | 2009-12-03 | Bayerische Motoren Werke Aktiengesellschaft | Steel alloy with alloying element for the protection against corrosion and/or embrittlement effect, useful in automotive engineerings |
DE202009014692U1 (en) * | 2009-10-30 | 2011-03-17 | Jvk Filtration Systems Gmbh | Filter plate with tempering and filter pack with such a filter plate |
-
1931
- 1931-01-23 DE DE1931K0130117 patent/DE690710C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3612966A1 (en) * | 1986-04-17 | 1987-10-22 | Franz Roth | Clamping fixture with handle - for foam-material sponge |
DE102008026154A1 (en) * | 2008-05-30 | 2009-12-03 | Bayerische Motoren Werke Aktiengesellschaft | Steel alloy with alloying element for the protection against corrosion and/or embrittlement effect, useful in automotive engineerings |
DE202009014692U1 (en) * | 2009-10-30 | 2011-03-17 | Jvk Filtration Systems Gmbh | Filter plate with tempering and filter pack with such a filter plate |
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