CN114318116A - Composition improvement of KmTBCr26 high-chromium cast iron - Google Patents
Composition improvement of KmTBCr26 high-chromium cast iron Download PDFInfo
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- CN114318116A CN114318116A CN202111488131.5A CN202111488131A CN114318116A CN 114318116 A CN114318116 A CN 114318116A CN 202111488131 A CN202111488131 A CN 202111488131A CN 114318116 A CN114318116 A CN 114318116A
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- CN
- China
- Prior art keywords
- cast iron
- kmtbcr26
- chromium cast
- chromium
- iron
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- 239000011651 chromium Substances 0.000 title claims abstract description 54
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 52
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 41
- 239000000203 mixture Substances 0.000 title abstract description 5
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 13
- 239000000956 alloy Substances 0.000 claims abstract description 13
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000010936 titanium Substances 0.000 claims abstract description 7
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 239000011733 molybdenum Substances 0.000 claims abstract description 6
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 12
- 239000002002 slurry Substances 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910000756 V alloy Inorganic materials 0.000 description 2
- 229910001037 White iron Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
The invention relates to a composition improvement of KmTBCr26 high-chromium cast iron, which comprises adding other alloy elements on the basis of the original composition of KmTBCr26 high-chromium cast iron, wherein the other alloy elements comprise 0.5-0.7% of vanadium, 0.3-0.4% of titanium and 0.6-0.8% of molybdenum. The invention has the advantages that: the wear resistance, the corrosion resistance and the service life of the alloy are improved.
Description
Technical Field
The invention relates to the technical field of metal materials, in particular to component improvement of KmTBCr26 high-chromium cast iron.
Background
The main material of the slurry pump is high-chromium white iron, the slurry pump is frequently washed by mineral particles in the slurry, and the slurry has just-broken sharp-angled particles, so that the scouring abrasion is rapidly accelerated, the service life of the slurry pump is shortened, namely the service life of the high-chromium white iron is shortened, and a new technology which can resist scouring and prolong the service life is provided.
Disclosure of Invention
The invention provides a composition improvement of KmTBCr26 high-chromium cast iron.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the improvement of the components of the KmTBCr26 high-chromium cast iron comprises adding other alloy elements on the basis of the original components of the KmTBCr26 high-chromium cast iron, wherein the other alloy elements comprise 0.5-0.7 percent of vanadium, 0.3-0.4 percent of titanium and 0.6-0.8 percent of molybdenum.
Further, the original components of the KmTBCr26 high-chromium cast iron comprise iron, chromium and carbon.
Further wherein said iron is 34% and said carbon is 3.9%.
After adopting the structure, the invention has the following advantages: aiming at the KmTBCr26 high-chromium cast iron for the slurry pump, the wear resistance and the corrosion resistance of the KmTBCr26 high-chromium cast iron are improved by improving the components, vanadium, titanium and molybdenum alloy elements are added on the basis of the original components of the KmTBCr26 high-chromium cast iron, the wear resistance and the corrosion resistance of the KmTBCr26 high-chromium cast iron are tried to be enhanced, the component structure and the tissue structure of the KmTBCr26 high-chromium cast iron are changed, the wear resistance and the corrosion resistance of the KmTBCr26 high-chromium cast iron are improved, and the comprehensive service life of the KmTBCr26 high-chromium cast iron is prolonged by more than 20%.
Detailed Description
The present invention is described in further detail below.
Implementation scheme one
The improvement of the components of the KmTBCr26 high-chromium cast iron comprises adding other alloy elements on the basis of the original components of the KmTBCr26 high-chromium cast iron, wherein the other alloy elements comprise 0.5 percent of vanadium, 0.3 percent of titanium and 0.6 percent of molybdenum.
Further, the original components of the KmTBCr26 high-chromium cast iron comprise iron, chromium and carbon.
Further wherein said iron is 34% and said carbon is 3.9%.
Example II
The improvement of the components of the KmTBCr26 high-chromium cast iron comprises adding other alloy elements on the basis of the original components of the KmTBCr26 high-chromium cast iron, wherein the other alloy elements comprise 0.7 percent of vanadium, 0.4 percent of titanium and 0.8 percent of molybdenum.
Further, the original components of the KmTBCr26 high-chromium cast iron comprise iron, chromium and carbon.
Further wherein said iron is 34% and said carbon is 3.9%.
High chromium cast iron is a multi-component alloy in which chromium and carbon are the basic components and molybdenum, nickel, manganese and copper are the usual alloying elements.
In high-chromium cast iron, chromium is a strong carbide-forming element, and the influence of the content on the carbide morphology is crucial:
chromium content below 8%When the carbide is M3C type (wherein M represents Fe, Cr and other alloy elements, the same holds true below), not only has low hardness (about 1000 Vickers hardness), but also is in continuous net distribution, and the cast iron is easy to brittle fracture;
with increasing chromium content, the carbides in the cast iron gradually move towards M7C3And (4) carrying out type conversion.
Above 12%, the carbide is mainly M7C3And (4) molding. The carbide is in a rod shape or a sheet shape, has poor continuity and high hardness (about 1600 Vickers hardness), and the wear resistance and the toughness of the cast iron are greatly improved.
The chromium content is between 8 and 10 percent, and then the carbide has M3Type C, also having M7C3And (4) molding. Due to the existence of M7C3Type carbide, interfere with M3The continuity of C-type carbide and the toughness of the cast iron are still obviously higher than those of low-chromium cast iron;
in the case of high chromium and low carbon, M, which has a low hardness, may also appear23C6A type carbide. If the chromium content is above 12%, but not too high, and the carbon content is low, the Cr/C ratio is above 8, it is also possible for M to occur23C6A type carbide.
In the heat treatment, M is generally precipitated when the local carbon content is low because secondary carbides are not sufficiently diffused in austenite in the process of precipitation of austenite23C6A type carbide.
If the cast iron is used under the working condition of corrosion and abrasion, and the cast iron is required to be both wear-resistant and corrosion-resistant, the chromium content of the cast iron is calculated according to the following formula:
Cr(％)≥10×C％+12.5％
the starting point for the above formula is: in the high-chromium cast iron, the electrode potential of carbide is higher than that of a matrix structure, and the key point of improving the corrosion resistance is to improve the corrosion resistance of the matrix, so that the chromium content in the matrix is ensured to be more than 12.5 percent; in addition, the chromium content of carbides in high-chromium cast irons is approximately 10 times the carbon content.
Cast iron containing chromium of 35% or more has good corrosion resistance and heat resistance, but its carbide is M23C6The matrix structure is mainly ferrite, which can not strongly support carbide, and is only suitable for working conditions of low stress abrasion.
In the specific implementation of the invention, the KmTBCr26 high-chromium cast iron for the slurry pump is improved in wear resistance and corrosion resistance through component improvement, vanadium, titanium and molybdenum alloy elements are added on the basis of the original components of the KmTBCr26 high-chromium cast iron, the wear resistance and corrosion resistance are tried to be enhanced, the component structure and the structure are changed, the wear resistance and corrosion resistance are improved, and the comprehensive service life is prolonged by more than 20%.
The present invention and its embodiments have been described above, but the description is not limitative, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
- The improvement of the components of KmTBCr26 high-chromium cast iron is characterized in that: comprises adding other alloy elements on the basis of the original components of KmTBCr26 high-chromium cast iron, wherein the other alloy elements comprise 0.5-0.7 percent of vanadium, 0.3-0.4 percent of titanium and 0.6-0.8 percent of molybdenum.
- 2. The compositional improvement of KmTBCr26 high chromium cast iron according to claim 1, wherein: the original components of the KmTBCr26 high-chromium cast iron comprise iron, chromium and carbon.
- 3. The compositional improvement of KmTBCr26 high chromium cast iron according to claim 2, wherein: wherein the iron is 34% and the carbon is 3.9%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111488131.5A CN114318116A (en) | 2021-12-08 | 2021-12-08 | Composition improvement of KmTBCr26 high-chromium cast iron |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111488131.5A CN114318116A (en) | 2021-12-08 | 2021-12-08 | Composition improvement of KmTBCr26 high-chromium cast iron |
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| Publication Number | Publication Date |
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| CN114318116A true CN114318116A (en) | 2022-04-12 |
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| CN202111488131.5A Pending CN114318116A (en) | 2021-12-08 | 2021-12-08 | Composition improvement of KmTBCr26 high-chromium cast iron |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985001962A1 (en) * | 1983-10-24 | 1985-05-09 | Giw Industries, Inc. | Abrasive resistant white cast iron |
| AU2003902535A0 (en) * | 2003-05-22 | 2003-06-05 | Weir Warman Ltd | Wear resistant cast iron |
| CN101195890A (en) * | 2007-12-04 | 2008-06-11 | 北京工业大学 | High chromium abrasion-proof cast iron abrasive disc and manufacturing method thereof |
| CN104131214A (en) * | 2013-05-02 | 2014-11-05 | 襄阳通威机械有限公司 | Improved wear-resistant cast iron material-blending technology |
| CN104762548A (en) * | 2015-03-30 | 2015-07-08 | 山东双轮股份有限公司 | Titanium/nitrogen-codoped wear-resistant corrosion-resistant high-chromium cast iron and preparation method thereof |
| CN106319334A (en) * | 2016-09-29 | 2017-01-11 | 湖南长高新材料股份有限公司 | High-chromium cast iron alloy material as well as manufacturing method and application thereof |
-
2021
- 2021-12-08 CN CN202111488131.5A patent/CN114318116A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985001962A1 (en) * | 1983-10-24 | 1985-05-09 | Giw Industries, Inc. | Abrasive resistant white cast iron |
| AU2003902535A0 (en) * | 2003-05-22 | 2003-06-05 | Weir Warman Ltd | Wear resistant cast iron |
| CN101195890A (en) * | 2007-12-04 | 2008-06-11 | 北京工业大学 | High chromium abrasion-proof cast iron abrasive disc and manufacturing method thereof |
| CN104131214A (en) * | 2013-05-02 | 2014-11-05 | 襄阳通威机械有限公司 | Improved wear-resistant cast iron material-blending technology |
| CN104762548A (en) * | 2015-03-30 | 2015-07-08 | 山东双轮股份有限公司 | Titanium/nitrogen-codoped wear-resistant corrosion-resistant high-chromium cast iron and preparation method thereof |
| CN106319334A (en) * | 2016-09-29 | 2017-01-11 | 湖南长高新材料股份有限公司 | High-chromium cast iron alloy material as well as manufacturing method and application thereof |
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Application publication date: 20220412 |