CH310888A - Steel, especially for heat-resistant objects. - Google Patents
Steel, especially for heat-resistant objects.Info
- Publication number
- CH310888A CH310888A CH310888DA CH310888A CH 310888 A CH310888 A CH 310888A CH 310888D A CH310888D A CH 310888DA CH 310888 A CH310888 A CH 310888A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- steel according
- steel
- boron
- carbon
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 23
- 239000010959 steel Substances 0.000 title claims description 23
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 15
- 229910052796 boron Inorganic materials 0.000 claims description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 239000011572 manganese Substances 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 239000011574 phosphorus Substances 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims 5
- 229910002065 alloy metal Inorganic materials 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 241000238413 Octopus Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Description
Stahl, insbesondere für warmfeste Gegenstände. Es ist bekannt, Chromstähle, die im wesentlichen 1-20% Chrom enthalten, und gegebenenfalls weitere Zusätze, wie dies in solchen Stählen üblich ist, mit einem Bor gehalt zu versehen, um ihnen Warmfestigkeit zu verleihen bzw. um diese Eigenschaften zu verbessern, d. h.
also Stähle herzustellen, die gute DVM-Kriechgrenzen, Zeitstand- festigkeiten und Zeitdehngrenzen aufweisen, wie sie beispielsweise erforderlich sind für Werkstoffe, die zur Herstellung von Dampf kraftanlagen, Krackanlagen, Hydrieranlagen und ähnlichen Einrichtungen, bei denen ent sprechende Beanspruchungen auftreten, ver wendet werden.
Die Steigerung der Warmfestigkeitseigen- schaften dieser Stähle wurde bislang vor wiegend auf den Borgehalt zurückgeführt und zunächst ergab sich in der Fertigung solcher Stähle die Tendenz, den Borgehalt zu steigern, wenn höhere Warmfestigkeitseigen- schaften verlangt wurden. Erst in jüngster Zeit ist erkannt worden, dass sehr niedrige Borgehalte ebenfalls in Richtung einer Er höhung der Warmfestigkeit zu wirken ver mögen.
Es wurde nun gefunden, dass nicht nur der Borgehalt einen wesentlichen Einfluss ausübt, sondern dass vielmehr zwischen dem Borgehalt und dem Kohlenstoffgehalt ein nicht genau geklärter Zusammenhang be steht, jedoch mit der Wirkung, dass die Warmfestigkeitseigenschaften bei gleichblei bendem Borgehalt mit abnehmendem Koh lenstoffgehalt verbessert werden. Es sind mit hin für Zwecke, bei denen es auf diese Warm festigkeitseigenschaften ankommt, diejenigen nickelfreien Chromstähle besonders geeignet, deren Kohlenstoffgehalt niedrig liegt.
Die Erfindung betrifft somit einen Stahl, insbesondere für Gegenstände, die gute Warmfestigkeitseigensehaften aufweisen müs sen, der gekennzeichnet ist durch einen Gehalt an
EMI0001.0025
1,0 <SEP> -20,0 <SEP> % <SEP> Chrom
<tb> 0,001- <SEP> 0,3 <SEP> <B>0/0</B> <SEP> Bor
<tb> 0,20 <SEP> - <SEP> 0,03% <SEP> Kohlenstoff
<tb> bis <SEP> 1,0 <SEP> % <SEP> Mangan
<tb> bis <SEP> 0,04% <SEP> Phosphor
<tb> bis <SEP> 0,04% <SEP> Schwefel Ein solcher Stahl kann zusätzlich noch Wolfram, Vanadin, Molybdän, Silizium, Zir- konium, Titan, Niob,
Tantal und Kobalt einzeln oder zu mehreren enthalten, wobei die Gesamtmenge 5% nicht übersteigen soll. Es ist ausserdem möglich, insbesondere bei grossen Querschnitten der herzustellenden Erzeugnisse, Nickelgehalte bis zu 2,5% vor zusehen. Die Stähle haben bei einem gegebenen Borgehalt um so günstigere Warmfestigkeits- eigenschaften je niedriger der Kohlenstoff gehalt gewählt wird.
Die Stähle eignen sich daher insbesondere zur Herstellung von warmfesten Rohren, warmfesten Schrauben und sonstigen Teilen von Dampfkraftanlagen sowie Turbinen schaufeln, Anlagen zum Kraken, Hydrieren und dergleichen.
Als Beispiel für einen erfindungsgemässen Stahl wird ein solcher mit
EMI0002.0004
0,08-0,12% <SEP> Kohlenstoff
<tb> 0,2 <SEP> -0,4 <SEP> % <SEP> Silizium
<tb> 0,4 <SEP> -0,6 <SEP> % <SEP> Mangan
<tb> 5,0 <SEP> -6,0 <SEP> % <SEP> Chrom
<tb> 0,4 <SEP> -0,6 <SEP> % <SEP> Molybdän
<tb> 0,2 <SEP> -0,3 <SEP> % <SEP> Vanadin
<tb> 0,02-0,05% <SEP> Bor <SEP> und Rest Eisen, mit den üblichen Gehalten (d. h. je bis 0,04%) an Phosphor und Schwefel genannt.
Desgleichen ein Stahl mit
EMI0002.0006
0,10- <SEP> <B>0,150/,</B> <SEP> Kohlenstoff
<tb> 0,2 <SEP> - <SEP> 0,4 <SEP> % <SEP> Silizium
<tb> 0,4 <SEP> - <SEP> 0,6 <SEP> % <SEP> Mangan
<tb> 0,6 <SEP> - <SEP> 0,8 <SEP> lo <SEP> Nickel
<tb> 12,0 <SEP> -13,0 <SEP> % <SEP> Chrom
<tb> 1,8 <SEP> - <SEP> 2,1 <SEP> % <SEP> Molybdän
<tb> 1,8 <SEP> - <SEP> 2,1 <SEP> % <SEP> Kobalt
<tb> 0,02- <SEP> 0,05% <SEP> Bor <SEP> und Rest Eisen. mit den üblichen Gehalten an Schwefel und Phosphor.
Steel, especially for heat-resistant objects. It is known to provide chromium steels which contain essentially 1-20% chromium, and optionally other additives, as is customary in such steels, with a boron content in order to give them high-temperature strength or to improve these properties, d . H.
In other words, to produce steels that have good DVM creep limits, creep strengths and time expansion limits, such as those required for materials that are used in the manufacture of steam power plants, cracking plants, hydrogenation plants and similar facilities where the corresponding loads occur.
The increase in the high-temperature strength properties of these steels has so far mainly been attributed to the boron content, and initially there was a tendency in the manufacture of such steels to increase the boron content when higher high-temperature strength properties were required. Only recently has it been recognized that very low boron contents can also act in the direction of increasing the heat resistance.
It has now been found that not only the boron content has a significant influence, but rather that there is a relationship that has not been precisely clarified between the boron content and the carbon content, but with the effect that the high-temperature strength properties are improved with a constant boron content with decreasing carbon content . For purposes in which these heat resistance properties are important, those nickel-free chromium steels with a low carbon content are particularly suitable.
The invention thus relates to a steel, in particular for objects that must have good heat resistance properties, which is characterized by a content of
EMI0001.0025
1.0 <SEP> -20.0 <SEP>% <SEP> chrome
<tb> 0.001- <SEP> 0.3 <SEP> <B> 0/0 </B> <SEP> boron
<tb> 0.20 <SEP> - <SEP> 0.03% <SEP> carbon
<tb> to <SEP> 1.0 <SEP>% <SEP> manganese
<tb> to <SEP> 0.04% <SEP> phosphorus
<tb> to <SEP> 0.04% <SEP> sulfur Such a steel can also contain tungsten, vanadium, molybdenum, silicon, zirconium, titanium, niobium,
Contain tantalum and cobalt individually or in groups, whereby the total amount should not exceed 5%. It is also possible, especially in the case of large cross-sections of the products to be manufactured, to provide nickel contents of up to 2.5%. With a given boron content, the steels have more favorable heat resistance properties the lower the carbon content is selected.
The steels are therefore particularly suitable for the production of heat-resistant pipes, heat-resistant screws and other parts of steam power plants as well as blades for turbines, plants for octopus, hydrogenation and the like.
As an example of a steel according to the invention, a steel with
EMI0002.0004
0.08-0.12% <SEP> carbon
<tb> 0.2 <SEP> -0.4 <SEP>% <SEP> silicon
<tb> 0.4 <SEP> -0.6 <SEP>% <SEP> manganese
<tb> 5.0 <SEP> -6.0 <SEP>% <SEP> chrome
<tb> 0.4 <SEP> -0.6 <SEP>% <SEP> molybdenum
<tb> 0.2 <SEP> -0.3 <SEP>% <SEP> vanadium
<tb> 0.02-0.05% <SEP> boron <SEP> and the remainder iron, with the usual contents (i.e. up to 0.04% each) of phosphorus and sulfur.
Also a steel with
EMI0002.0006
0.10- <SEP> <B> 0.150 /, </B> <SEP> carbon
<tb> 0.2 <SEP> - <SEP> 0.4 <SEP>% <SEP> silicon
<tb> 0.4 <SEP> - <SEP> 0.6 <SEP>% <SEP> manganese
<tb> 0.6 <SEP> - <SEP> 0.8 <SEP> lo <SEP> nickel
<tb> 12.0 <SEP> -13.0 <SEP>% <SEP> chrome
<tb> 1.8 <SEP> - <SEP> 2.1 <SEP>% <SEP> molybdenum
<tb> 1.8 <SEP> - <SEP> 2.1 <SEP>% <SEP> cobalt
<tb> 0.02- <SEP> 0.05% <SEP> boron <SEP> and the remainder iron. with the usual levels of sulfur and phosphorus.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE310888X | 1951-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH310888A true CH310888A (en) | 1955-11-15 |
Family
ID=6126716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH310888D CH310888A (en) | 1951-06-13 | 1952-06-10 | Steel, especially for heat-resistant objects. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH310888A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2135885A1 (en) * | 1970-07-21 | 1972-01-27 | Vuoksenniska Ab Oy | Well-machinable case-hardening steels and their uses |
| DE1758565B1 (en) * | 1967-06-29 | 1972-03-16 | English Steel Corp Ltd | USE OF A HEAT RESISTANT DOWN-ALLOY STEEL FOR THE MANUFACTURE OF LARGE FORGINGS FOR STEAM TURBINE ROTORS |
| DE3207032A1 (en) * | 1981-02-27 | 1982-09-16 | Hitachi, Ltd., Tokyo | STEELS WITH LOW C, CR AND MO CONTENT |
| EP0509453A1 (en) * | 1991-04-15 | 1992-10-21 | Hitachi Metals, Ltd. | Heat-resistant cast steel, method of producing same, and exhaust equipment member made thereof |
-
1952
- 1952-06-10 CH CH310888D patent/CH310888A/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1758565B1 (en) * | 1967-06-29 | 1972-03-16 | English Steel Corp Ltd | USE OF A HEAT RESISTANT DOWN-ALLOY STEEL FOR THE MANUFACTURE OF LARGE FORGINGS FOR STEAM TURBINE ROTORS |
| DE2135885A1 (en) * | 1970-07-21 | 1972-01-27 | Vuoksenniska Ab Oy | Well-machinable case-hardening steels and their uses |
| DE3207032A1 (en) * | 1981-02-27 | 1982-09-16 | Hitachi, Ltd., Tokyo | STEELS WITH LOW C, CR AND MO CONTENT |
| EP0509453A1 (en) * | 1991-04-15 | 1992-10-21 | Hitachi Metals, Ltd. | Heat-resistant cast steel, method of producing same, and exhaust equipment member made thereof |
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