CN1029692C - Ferrochromium alloy - Google Patents
Ferrochromium alloy Download PDFInfo
- Publication number
- CN1029692C CN1029692C CN90107369A CN90107369A CN1029692C CN 1029692 C CN1029692 C CN 1029692C CN 90107369 A CN90107369 A CN 90107369A CN 90107369 A CN90107369 A CN 90107369A CN 1029692 C CN1029692 C CN 1029692C
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- alloy
- chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
-
- 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
- C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Soft Magnetic Materials (AREA)
- Materials For Medical Uses (AREA)
- Powder Metallurgy (AREA)
- Heat Treatment Of Articles (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Braking Arrangements (AREA)
- Chemically Coating (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Physical Vapour Deposition (AREA)
- Electrolytic Production Of Metals (AREA)
- Hard Magnetic Materials (AREA)
- Earth Drilling (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
An erosion and corrosion resistant ferrochromium alloy comprising the following composition, in wt. %, 34 - 50 chromium, 1.5 - 2.5 carbon, up to 5 manganese, up to 5 silicon, up to 5 molybdenum, up to 10 nickel, up to 5 copper, up to 1 % of each of one or more micro-alloying elements selected from the group consisting of titanium, zirconium, niobium, boron, vanadium and tungsten, and balance, iron and incidental impurities. The alloy has a microstructure comprising eutectic chromium carbides in a matrix comprising one or more of ferrite, retained austenite and martensite. Optionally, the microstructure further comprises one of primary chromium carbides, primary ferrite or primary austenite in the matrix.
Description
The present invention relates to a kind of ferrochrome exothermic, the particularly a kind of wear-resisting corrosive of anti-damage ferrochrome exothermic.
Alloy of the present invention is used for making the part of in-line pump, pipeline, nozzle, agitator and allied equipment, and it can stand to contain the erosion of corrosive fluid and abradability granular mixture when work.
The typically used of these parts comprises that part is exposed to flue gas desulfurization (FGD) in sulfuric acid and the Wingdale and part and is exposed to chemical fertilizers production in phosphoric acid, nitric acid and the gypsum.
Transfer gives the United States Patent (USP) 4 of Abex company, 536,232 and 4,080,198(" Abex United States Patent (USP) ") disclosed ferrochrome exothermic contains about 1.6%(weight) carbon and 28%(weight) chromium, it is characterized in that chromium carbide and ferrite are distributed in the martensite or austenitic matrix that contains solid solution chromium.Chromium content in the alloy should make alloy present excellent corrosion resisting performance.But with regard to it was corrosion-resistant, very order was dissatisfied for the performance of this alloy.
The purpose of this invention is to provide a kind of ferrochrome exothermic, with the alloy phase ratio of Abex U.S. Patent Publication, it has better wear-resistant corrosion resistance nature.
In the Abex United States Patent (USP) alloy of disclosed the sort of type in acidic medium in acidic medium wearing and tearing and Corrosion Mechanism be since the abradability particle in the liquid stream constantly except that the depassivation anticorrosion layer, thereby accelerated corrosion.
In order to replenish purification layer, in matrix, need high as far as possible chromium concn.
But, increasing chromium content simply and can cause forming the σ phase to improve its erosion resistance, σ can cause fragility mutually, is undesirable therefore.
The present invention is based on following understanding and finishes, increase the chromium of Abex U.S. Patent Publication alloy and the concentration of carbon simultaneously, this may increase the percent by volume of chromium carbide phase, and can improve the wear resistance of this ferrochrome exothermic, keep chromium concn in the matrix in certain level simultaneously, and do not cause forming the σ phase.As mentioned above, according to wearing and tearing and Corrosion Mechanism take place, the wear resistance of estimation improvement ferrochrome exothermic may be improved the wear-resistant and corrosion resistance nature of ferrochrome exothermic.
Composition (weight %) wear-resistant and corrosion-resistant ferrochrome exothermic provided by the invention is as follows:
34-50 chromium
1.5-2.5 carbon
≤ 5 manganese
≤ 5 silicon
≤ 5 molybdenums
≤ 10 nickel
≤ 5 bronze medals
One or more trace alloying elements of every kind of content≤1 are selected from titanium, zirconium, niobium, boron, vanadium and tungsten.
All the other are iron and institute's incidental impurities,
Its microstructure is the eutectic chromium carbide in matrix, its matrix be following defined ferrite, residual austenite and martensitic one or more.
Term " ferrite " refers to such an extent that be the body-centered cubic iron (α and/or δ form) that contains solid solution chromium.
Term " austenite " refers to such an extent that be the face-centered cubic iron that contains solid solution carbon and chromium.
Term " martensite " refers to such an extent that be austenitic transmutation product.
Preferably matrix contains 25-35%(weight) solid solution chromium.
Preferred microstructure is also to contain once chromium carbide in matrix, ferrite or once austenitic one of them.
(weight %) is as follows for the preferred content of elemental chromium, carbon, manganese, silicon, molybdenum, nickel and copper:
36-40 chromium
1.9-2.1 carbon
1-2 manganese
0.5-1.5 silicon
The 1-2 molybdenum
1-5 nickel
1-2 copper
For above-mentioned preferred composition, preferred substrate contains 29-32%(weight) solid solution chromium.
According to the present invention, the chromium and the carbon content that increase ferrochrome exothermic simultaneously make it to be higher than disclosed content in the Abex United States Patent (USP), make the hard carbide that forms more volume percentage ratio to improve wear resistance.More particularly, preferable is that the chemical equilibrium that increases chromium and carbon content makes the chromium carbide that forms more volume percentage ratio and do not increase matrix chromium content and make to reach and produce more than the mutually brittle threshold value of σ.
As can be seen, the preferred alloy of the present invention presents the antiwear anti-corrosion more superior than the alloy of Abex U.S. Patent Publication.This can be by following table 1 explanation, and table 1 has been listed the standard electrokinetic potential corrosion of Abex U.S. Patent Publication alloy and preferred alloy of the present invention and the result that the garden mill decreases test.The composition of alloy is provided by table 2.
Table 1. corrosion and wearing test result
Corrosion
*Wearing and tearing
*
(millimeter/year) (millimeter
3/ hour)
Abex alloy 1
*5.60 488
Abex alloy 2
*2.50 614
* 10% sulfuric acid, 25 ℃ to ASTM G61
* 40%(weight) silica sand mud 18 meter per seconds
The composition of table 2 table 1 interalloy
Cr C Mn Si Mo Ni Cu Fe
Abex alloy 1
*28.4 surplus in the of 1.94 0.97 1.48 2.10 2.01 1.49
Abex alloy 2
* *27.5 surplus in the of 1.65 1.21 1.47 2.00 2.00 1.39
* United States Patent (USP) 4,536, the casting alloy in 232 the composition range
In the composition range of * United States Patent (USP) 4,536,232 through heat treatable alloy
As can be seen from Table 1, the corrosion-resistant and abrasion resistance properties of preferred alloy of the present invention is more far better than Abex alloy.
Alloy of the present invention has the microstructure of the alloy that is different from the Abex U.S. Patent Publication, and its difference can be proved by the accompanying drawing of the Photomicrograph that contains Abex U.S. Patent Publication alloy and preferred alloy of the present invention.
Fig. 1 represents the microstructure of Abex alloy, and this alloy contains 28.4% chromium, 1.94% carbon, 0.97% manganese, 1.48% silicon, 2.10% molybdenum, 2.01% nickel, 1.49% bronze medal, and all the other are iron basically.This microstructure comprises an austenite dendrites (50% volume) and is included in the eutectic structure of the eutectic carbides in eutectic ferrite, residual austenite and the martensitic matrix.
Fig. 2 represents a kind of microstructure of preferred alloy of the present invention, and this alloy contains 35.8% chromium, 1.94% carbon, 0.96% manganese, 1.48% silicon, 2.06% molybdenum, 2.04% nickel, 1.48% bronze medal, and all the other are iron basically.This microstructure is hypereutectic, and it has a ferrite dendrite (20% volume) and is included in the eutectic structure of fully decentralized eutectic carbides in the ferritic matrix of eutectic.As can be seen, when comparing with the microstructure of Figure 1A bex alloy, Fig. 2 microstructure reflects that the volume of a dendrite reduces, and the volume of eutectic matrix increases, because this eutectic matrix has a more a high proportion of carbide, when with the Abex alloy phase than the time, the percent by volume of the hard carbide in this alloy increases generally.Can see that Fig. 3-5 is compared with the microstructure shown in Fig. 1, and above-mentioned in the larger context phenomenon also clearly.
Fig. 3 represents the microstructure of the preferred another kind of alloy of the present invention, and this alloy contains 40.0% chromium, 1.92% carbon, 0.96% manganese, 1.59% silicon, 1.95% molybdenum, 1.95% nickel, 1.48% bronze medal, and all the other are iron basically.This microstructure is the eutectic carbides in the eutectic ferrite matrix.
Fig. 4 represents the microstructure of the preferred another kind of alloy of the present invention, and this alloy contains 40.0% chromium, 2.30% carbon, 2.77% manganese, 1.51% silicon, 2.04% molybdenum, 1.88% nickel, 1.43% bronze medal, and all the other are iron basically.This microstructure is hypereutectic, and it has M one time
7C
3Carbide and the eutectic structure that is included in the eutectic carbides in the eutectic ferrite matrix.
Fig. 5 represents the microstructure of the preferred another kind of alloy of the present invention, and this alloy contains 43% chromium, 2.02% carbon, 0.92% manganese, 1.44% silicon, 1.88% molybdenum, 1.92% nickel, 1.2% bronze medal, and all the other are iron basically.Microstructure in this case is hypereutectic, and it has M of trace
7C
3Carbide and the eutectic structure that is included in the eutectic carbides in the eutectic ferrite matrix.
Casting of any suitable routine and heat treatment technics can be used for production alloy of the present invention.Yet, preferably cast, thermal treatment under 600-1000 ℃ temperature then, air cooling is produced this alloy subsequently.
Many variations can be arranged and do not break away from the spirit and scope of the present invention for above-mentioned alloy.
Claims (3)
1, a kind of wear-resistant and corrosion resistant ferrochrome exothermic, the composition (weight %) that it is characterized in that this alloy is a 34-50 chromium, 2.3-2.5 carbon, all the other are iron and institute's incidental impurities.
2, according to the alloy of claim 1, it is characterized in that this alloy also comprises following composition (weight %) :≤5 manganese, silicon, molybdenum and copper ,≤10 nickel, and one or more trace alloying elements of every kind of content≤1: titanium, zirconium, niobium, boron, vanadium and tungsten.
3,, it is characterized in that the contained following composition (weight %) of this alloy is according to the alloy of claim 1 or 2:
36-40 chromium
2.3-2.5 carbon
1-2 manganese
0.5-1.5 silicon
The 1-2 molybdenum
1-5 nickel
1-2 copper.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPJ5628 | 1989-08-04 | ||
| AUPJ562889 | 1989-08-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1050569A CN1050569A (en) | 1991-04-10 |
| CN1029692C true CN1029692C (en) | 1995-09-06 |
Family
ID=3774096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90107369A Expired - Lifetime CN1029692C (en) | 1989-08-04 | 1990-08-04 | Ferrochromium alloy |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0438560B1 (en) |
| KR (1) | KR940003890B1 (en) |
| CN (1) | CN1029692C (en) |
| AT (1) | ATE137274T1 (en) |
| CA (1) | CA2037921C (en) |
| DE (1) | DE69026701T2 (en) |
| ES (1) | ES2087159T3 (en) |
| HK (1) | HK1006859A1 (en) |
| HU (1) | HU212085B (en) |
| TW (1) | TW208044B (en) |
| WO (1) | WO1991002101A1 (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4409278A1 (en) * | 1994-03-18 | 1995-09-21 | Klein Schanzlin & Becker Ag | Corrosion and wear resistant chilled cast iron |
| EP0760019B1 (en) * | 1994-05-17 | 1997-11-19 | KSB Aktiengesellschaft | Highly corrosion and wear resistant chilled casting |
| DE19512044A1 (en) * | 1994-05-17 | 1995-11-23 | Klein Schanzlin & Becker Ag | Chilled cast iron with high corrosion and wear resistance |
| SE522667C2 (en) * | 2000-05-16 | 2004-02-24 | Proengco Tooling Ab | Process for the preparation of an iron-based chromium carbide containing dissolved tungsten and such an alloy |
| CN1353204B (en) * | 2000-11-09 | 2012-05-23 | 国立清华大学 | High-irregularity multi-element alloy |
| CN101466914B (en) * | 2006-04-21 | 2014-10-01 | 国际壳牌研究有限公司 | Time sequenced heating of multiple layers in a hydrocarbon containing formation |
| US8479700B2 (en) * | 2010-01-05 | 2013-07-09 | L. E. Jones Company | Iron-chromium alloy with improved compressive yield strength and method of making and use thereof |
| US9080229B2 (en) | 2012-05-07 | 2015-07-14 | Ut-Battelle, Llc | Nano-composite stainless steel |
| CN102747304A (en) * | 2012-06-23 | 2012-10-24 | 昆明嘉和科技股份有限公司 | Corrosion-resistant abrasion-resistant alloy material and preparation method thereof |
| CN103668176B (en) * | 2012-09-20 | 2016-01-20 | 丹阳宏图激光科技有限公司 | Be beneficial to the laser cladding repair technique of the gear improving hardness and wear resistance |
| CN103436800A (en) * | 2013-07-18 | 2013-12-11 | 襄阳五二五泵业有限公司 | Iron-chromium alloy having high wear and corrosion resistance and corrosion resistance |
| JP6151304B2 (en) | 2015-05-26 | 2017-06-21 | 山陽特殊製鋼株式会社 | Projection material for shot peening using hard powder with high productivity and corrosion resistance |
| CN105003758A (en) * | 2015-06-15 | 2015-10-28 | 淄博滕坤工贸有限公司 | High alloy wear-resistant double-layer composite straight pipe used for concrete pump truck |
| CN105483558A (en) * | 2015-12-08 | 2016-04-13 | 襄阳五二五泵业有限公司 | High-chromium alloy material for flue gas desulfurization pump and manufacturing method of high-chromium alloy material |
| CN105755362B (en) * | 2016-02-23 | 2017-09-01 | 湖南省冶金材料研究院 | A kind of high carbon and chromium powder metallurgy high-abrasive material and preparation method thereof |
| CN107747055A (en) * | 2017-09-28 | 2018-03-02 | 江苏晶王新材料科技有限公司 | A kind of wear-resistant light metal material |
| CN107988540A (en) * | 2017-12-01 | 2018-05-04 | 张海江 | A kind of wear-resisting rare earth alloy and preparation method thereof |
| CN108397086B (en) * | 2018-02-28 | 2019-04-30 | 苏州盈腾五金制品有限公司 | A kind of corrosion-resistant plastic-steel door and window |
| CN112226671A (en) * | 2020-09-29 | 2021-01-15 | 安徽索立德铸业有限公司 | Wear-resistant corrosion-resistant alloy for water pump casting and preparation method thereof |
| CN113215479A (en) * | 2021-05-07 | 2021-08-06 | 福建辉丰环境工程科技有限公司 | Preparation method of high-wear-resistance steel |
| CN115537683B (en) * | 2021-06-30 | 2024-03-12 | 叶均蔚 | High-strength corrosion-resistant ferrochrome block and application thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB220006A (en) * | 1923-02-09 | 1924-08-11 | Robert Abbott Hadfield | Improvements in or relating to alloys |
| GB362375A (en) * | 1930-05-19 | 1931-11-25 | Bernhard Vervoort | Improvements in and relating to the manufacture of cast iron articles |
| GB401644A (en) * | 1932-02-11 | 1933-11-16 | Krupp Ag | Improvements in chromium cast iron alloys |
| US3086858A (en) * | 1960-07-22 | 1963-04-23 | West Coast Alloys Co | Hard cast alloy |
| LU63431A1 (en) * | 1971-06-29 | 1973-01-22 |
-
1990
- 1990-08-03 KR KR1019910700327A patent/KR940003890B1/en not_active IP Right Cessation
- 1990-08-03 AT AT90911863T patent/ATE137274T1/en active
- 1990-08-03 DE DE69026701T patent/DE69026701T2/en not_active Expired - Lifetime
- 1990-08-03 EP EP90911863A patent/EP0438560B1/en not_active Expired - Lifetime
- 1990-08-03 HU HU906124A patent/HU212085B/en unknown
- 1990-08-03 CA CA002037921A patent/CA2037921C/en not_active Expired - Lifetime
- 1990-08-03 WO PCT/AU1990/000331 patent/WO1991002101A1/en active IP Right Grant
- 1990-08-03 ES ES90911863T patent/ES2087159T3/en not_active Expired - Lifetime
- 1990-08-04 CN CN90107369A patent/CN1029692C/en not_active Expired - Lifetime
- 1990-08-18 TW TW079106940A patent/TW208044B/zh active
-
1998
- 1998-06-22 HK HK98106026A patent/HK1006859A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| HUT57285A (en) | 1991-11-28 |
| KR920701499A (en) | 1992-08-11 |
| EP0438560A4 (en) | 1992-01-15 |
| CA2037921C (en) | 2006-11-21 |
| ATE137274T1 (en) | 1996-05-15 |
| CN1050569A (en) | 1991-04-10 |
| HU212085B (en) | 1996-02-28 |
| HU906124D0 (en) | 1991-07-29 |
| EP0438560A1 (en) | 1991-07-31 |
| DE69026701T2 (en) | 1996-12-12 |
| HK1006859A1 (en) | 1999-03-19 |
| DE69026701D1 (en) | 1996-05-30 |
| EP0438560B1 (en) | 1996-04-24 |
| CA2037921A1 (en) | 1991-02-04 |
| KR940003890B1 (en) | 1994-05-04 |
| WO1991002101A1 (en) | 1991-02-21 |
| TW208044B (en) | 1993-06-21 |
| ES2087159T3 (en) | 1996-07-16 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 19950906 |