CN101328556B - Toughening processing method of hard phase Fe3C in plain white cast iron - Google Patents
Toughening processing method of hard phase Fe3C in plain white cast iron Download PDFInfo
- Publication number
- CN101328556B CN101328556B CN2008101504607A CN200810150460A CN101328556B CN 101328556 B CN101328556 B CN 101328556B CN 2008101504607 A CN2008101504607 A CN 2008101504607A CN 200810150460 A CN200810150460 A CN 200810150460A CN 101328556 B CN101328556 B CN 101328556B
- Authority
- CN
- China
- Prior art keywords
- iron
- cast iron
- white cast
- molten
- hard phase
- 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 - Fee Related
Links
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to the common white cast iron field, disclosing a method for the malleableizing treatment on a hard phase of common white cast iron Fe3C. The common abrasion resistant white cast iron which is subjected to the hard phase Fe3C malleableizing treatment is suitable for micro and low impact stress operating conditions and can be used to prepare corresponding abrasion resistant parts such as ploughshares, microsections and guide plates. The malleableizing treatment method comprises the following steps: firstly, materials of the common white cast iron including scrap steel, pig iron, ferrosilicon and ferromanganese are determined, and by taking the total weight of the materials of the common white cast iron as a reference, ferrochromium, ferromolybdenum and the materials of the common white cast iron are weighted respectively according to 1.0 to 10 percent of Cr and 0 to 3.5 percent of Mo; secondly, the materials of the common white cast iron including the scrap steel,the pig iron, the ferrosilicon and the ferromanganese are orderly added in a furnace for smelting, after melting down, aluminum wires, the weight of which against the weight of molten iron is 0.01 percent, are used for deoxidation, and the ferrochromium and the ferromolybdenum are added in for melting down; finally, after the melting down of the molten iron, the molten iron is subject to standing, slag removal and forming, and the malleableizing treatment is completed.
Description
Technical field
The present invention relates to the ordinary white cast iron field, relate in particular to hard phase Fe in a kind of ordinary white cast iron
3The patent method of C, hard phase Fe
3Little, low shock stress operating mode that common spoken parts in traditional operas antifriction cast iron after the C patent is applicable to is used to prepare wear resisting parts such as corresponding ploughshare, abrasive disc, guide plate.
Background technology
Wearing and tearing are many industrial sector ubiquities such as metallurgy, mine, machinery, electric power, and become a major reason that causes equipment unit inefficacy or material damage, also are to cause one of maximum reason of financial loss.The present widely used high-chromium white cast iron that mostly is, and the ordinary white cast iron use is less, this one of the main reasons is owing to wear-resistant hard phase Fe in latter's tissue
3C hardness is lower, and toughness is relatively poor, thereby causes this material wear resistance relatively poor.
Both at home and abroad patent and documents and materials have mainly been reported by thermal treatment, have added alloying element, Alloying Treatment, the target that means improve hardness, toughness and the wear resistance of high-chromium white cast iron such as have been gone bad, bred, and are aided with the various informative wear resisting part that multiple means is made with high-chromium white cast iron.These have all obtained effect preferably, and the patent content that has has obtained widespread use.
About how improving hard phase Fe in the ordinary white cast iron
3The toughness of C is not seen relevant report at home and abroad.In fact hard phase in the rich chromium cast iron (Fe, Cr)
7C
3Be exactly by Fe
3Make its crystalline structure, growthhabit that bright variation take place behind a large amount of Cr element of solid solution among the C, thereby make (Fe, Cr)
7C
3Hardness and toughness obviously than Fe
3C increases, and wherein (Fe, Cr)
7C
3Hardness value (Hv) be 1300-1800; Fe
3The hardness value of C (Hv) is: 800-1100, the difference of this hardness also be in the rich chromium cast iron hard expect mutually to obtain (Fe, Cr)
7C
3Major cause.
Summary of the invention
The object of the present invention is to provide hard phase Fe in a kind of ordinary white cast iron
3The patent method of C, it can improve hard phase Fe under low cost
3The toughness of C, thereby the wear resisting property of raising ordinary white cast iron.
In order to achieve the above object, the present invention is achieved by the following technical solutions: hard phase Fe in a kind of ordinary white cast iron
3The patent method of C is characterized in that, may further comprise the steps:
At first, determine ordinary white cast iron batching to comprise steel scrap, the pig iron, ferrosilicon, ferromanganese, and be benchmark with ordinary white cast iron batching gross weight, according to the Cr element of 1.0-10% and the Mo element of 0-3.5%, calculate respectively and take by weighing ferrochrome, molybdenum-iron and ordinary white cast iron batching;
Then, prepare burden steel scrap, the pig iron, ferrosilicon, ferromanganese of ordinary white cast iron is added melting in the stove successively, molten clear after, adopt the aluminium wire deoxidation of weight of molten iron 0.01% after, add ferrochrome more successively, molybdenum-iron is molten clear;
At last, treat that molten iron is molten clear after, leave standstill, remove the gred, be shaped, get final product.
Further improvement of the present invention is: the granularity of described ferrochrome, molybdenum-iron is all less than 15mm.
The present invention adds a small amount of Cr, Mo element in ordinary white cast iron, make Cr, the solid solution of Mo atomic substitutions in Fe
3C mutually in, improve more weak atom bond energy between the atom, and then improve Fe
3The fracture toughness property of C phase, its fracture toughness property value can be from 50MPam
1/2Be increased to 160MPam
1/2More than, thereby can improve Fe
3C is effective wear-resistant effect in ordinary white cast iron, and cost is relatively low.Compare with wearing-resistance method with the toughness of traditional raising ordinary white cast iron, do not changing Fe
3Under the crystalline structure of C, the situation of growthhabit, realized hard phase Fe
3The tough property improvement of C.
Embodiment
For further improving the wear resistance and the work-ing life of ordinary white cast iron, the present invention proposes to add a small amount of Cr, Mo alloying element at ordinary white cast iron, makes its displacement solid solution in Fe
3Among the C, realize the target of its tough property improvement.Concrete technical scheme is:
(1) the chemical component weight per-cent of determining ordinary white cast iron is: C:2.0-4.0%, and Mn:0.5-1.5%, Si:0.5-1.5%, P, S＜0.03%, all the other are the Fe element; With ordinary white cast iron batching gross weight is benchmark, according to the Cr element of 1.0-10% and the Mo element of 0-3.5%, calculates the weight that takes by weighing ferrochrome, molybdenum-iron and steel scrap, the pig iron, ferrosilicon, ferromanganese respectively.
(2) hard phase Fe in the ordinary white cast iron
3The concrete toughening treatment process of C is: according to above-mentioned batching, with the melting in medium-frequency induction furnace successively of steel scrap, the pig iron, ferrosilicon, ferromanganese, after melting clearly, after adopting the aluminium wire deoxidation of weight of molten iron 0.01%, granularity is all added in the stove less than ferrochrome, the molybdenum-iron of 15mm, left standstill 1 minute after melting clearly, after slagging-off above the molten iron liquid level, pour molten iron into common sand mold castable.
(3) after the casting complete 12 hours, shake out, sampling, metallographic specimen preparation, then by the examination of Vickers instrumentation and fracture toughness property equation (suc as formula K
c=XP/C
3/2, X is remaining impression coefficient in the formula; P is a load, the N of unit; C is half of impression crack length, the m of unit.) calculating Fe
3The fracture toughness property value K of C phase
c, wherein each sample testing data is 10 groups, averages then.Calculation result shows: Fe
3The fracture toughness property value of C phase can never add the 50MPam before the alloying element
1/2Be increased to the 160MPam that adds behind a certain amount of alloying element
1/2More than.
Below specific embodiments of the invention are described:
Embodiment (one)
(1), determine that the chemical ingredients (wt.%) of common white cast iron is according to technical scheme of the present invention: C:2.3%, Mn:0.45%, Si:0.72%, P, S＜0.03%, all the other are the Fe element.On the identical basis of above-mentioned chemical ingredients, add in the absence of Mo element, the Cr element of the Different Weight percentage ratio of adding, and be respectively 0.0%, 1.0%, 2.0%, 4.0%, 6.0%, 8.0%, 10.0%, can obtain seven groups of samples, be defined as 0#, 1#, 2#, 3#....6# sample successively.
(2) according to the chemical ingredients of determining in the step (1), and the composition of steel scrap, the pig iron, ferrochrome, ferromanganese, determine their proportion relation, and gross weight is provided is 100 kilograms batching.
(3) steel scrap is heated to 1500 ℃ of fusings in induction furnace, after treating that molten steel melts clearly, it is further molten more clear to add the pig iron, ferrosilicon and ferromanganese successively, after adopting the aluminium wire deoxidation of weight of molten iron 0.01% then, the ferrochrome that granularity is about 5-10mm is put into stove, fusionly leaves standstill 1 minute after clear, after the slagging-off of molten iron liquid level, come out of the stove rapidly and pour casting ladle into, at last molten iron is poured into the sample that the sodium silicate sand mold casting becomes 20mm * 20mm * 110mm.
(4) after the casting complete 12 hours, shake out, sampling, metallographic specimen preparation, then by examination of Vickers instrumentation and fracture toughness property equation, calculating Fe
3The fracture toughness property value of C phase, wherein each sample testing data is 10 groups, averages Fe then
3C fracture toughness property test result is shown in data in the table one.
The different Cr add-ons of table one are to Fe
3The influence of C phase fracture toughness property value
| Specimen coding | 0# | 1# | 2# | 3# | 4# | 5# | 6# |
| Fe 3C fracture toughness property value/MPam 1/2 | 50.0 | 63.5 | 75.1 | 84.6 | 91.3 | 105.9 | 111.3 |
Embodiment (two)
(1), determine that the chemical ingredients (wt.%) of ordinary white cast iron is according to technical scheme of the present invention: C:3.30%, Mn:0.63%, Si:0.92%, P, S＜0.03%, all the other are the Fe element.On the identical basis of above-mentioned chemical ingredients, the Cr of the Different Weight percentage ratio of adding, Mo element, the weight percent that Cr, Mo add (totally six per-cent combinations) as shown in table two, can obtain six groups of samples.
(2) according to the chemical ingredients of determining in the step (1), and the composition of steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, determine their proportion relation, and gross weight is provided is 100 kilograms batching.
(3) steel scrap is heated to 1500 ℃ of fusings in induction furnace, treat that molten steel is molten clear after, it is further molten more clear to add the pig iron, ferrosilicon and ferromanganese successively; After adopting the aluminium wire deoxidation of weight of molten iron 0.01% then, the ferrochrome, the molybdenum-iron that granularity are about 15mm are put into stove successively, fusionly left standstill 1 minute after clear, after the slagging-off of molten iron liquid level, it is come out of the stove rapidly pour casting ladle into, at last molten iron is poured into the sample that the sodium silicate sand mold casting becomes 20mm * 20mm * 110mm.
(4) after the casting complete 12 hours, shake out, sampling, metallographic specimen preparation are then by examination of Vickers instrumentation and fracture toughness property Equation for Calculating Fe
3The fracture toughness property value of C phase, wherein each sample testing data is 10 groups, averages Fe then
3C fracture toughness property test result is shown in data in the table two.
The different Cr of table two, Mo add-on are to Fe
3The influence of C phase fracture toughness property value
| Cr/Mo weight percent (%) | 1.0/0.01 | 2.0/0.5 | 4.0/0.5 | 6.0/0.5 | 8.0/1.0 | 10.0/2.0 |
| Fe 3C fracture toughness property value/MPam 1/2 | 63.7 | 89.4 | 103.2 | 125.5 | 145.1 | 154.1 |
Embodiment (three)
(1), determine that the chemical ingredients (wt.%) of iron ordinary white cast iron is according to technical scheme of the present invention: C:3.80%, Mn:0.92%, Si:1.31%, Cu:0.80%, Ni:0.10%, Re:0.20%, P, S＜0.03%, all the other are the Fe element.On the identical basis of above-mentioned chemical ingredients, the Cr of the Different Weight percentage ratio of adding, Mo element, the weight percent that Cr, Mo add (totally five per-cent combinations) sees Table respectively shown in three, can obtain five groups of samples.
(2) according to the chemical ingredients of determining in the step (1), and the composition of steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, nickel block, copper coin, determine their proportion relation, and gross weight is provided is 100 kilograms batching.
(3) steel scrap is heated to 1500 ℃ of fusings in induction furnace, treat that molten steel is molten clear after, add the pig iron, ferrosilicon and ferromanganese, nickel block successively, further molten more clear; After adopting the aluminium wire deoxidation of weight of molten iron 0.01% then, the ferrochrome, the molybdenum-iron that granularity are about 10mm are put into stove successively, fusionly add copper coin successively after clear (equivalent diameter is about 15mm, thickness is about 3mm), left standstill 30 seconds after further melting clearly, after molten iron liquid level slagging-off, molten iron come out of the stove rapidly pour the casting ladle of putting into rare earth Re into and left standstill 10 seconds, at last molten iron is poured into the sample that the sodium silicate sand mold casting becomes 20mm * 20mm * 110mm.
(4) after the casting complete 12 hours, shake out, sampling, metallographic specimen preparation are then by examination of Vickers instrumentation and fracture toughness property Equation for Calculating Fe
3The fracture toughness property value of C phase, wherein each sample testing data is 10 groups, averages Fe then
3C fracture toughness property test result is shown in data in the table three.
The different Cr of table three, Mo add-on are to Fe
3The influence of C phase fracture toughness property value
| Cr/Mo weight percent (%) | 10.0/0.1 | 10.0/3.5 | 6.0/3.0 | 2.0/2.0 | 5.0/0.3 |
| Fe 3C fracture toughness property value/MPam 1/2 | 132.7 | 167.6 | 139.5 | 102.4 | 124.1 |
Embodiment (four)
(1) according to technical scheme of the present invention, the chemical ingredients (wt.%) of determining ordinary white cast iron is: C:2.90%, Mn:1.62%, Si:0.64%, B:0.02%, P, S＜0.03% is on the identical basis of above-mentioned chemical ingredients, Cr, the Mo element of the Different Weight percentage ratio that adds, all the other are the Fe element.The weight percent that Cr, Mo add (totally four per-cent combinations) sees Table respectively shown in four, can obtain four groups of samples.
(2) according to the chemical ingredients of determining in the step (1), and the composition of steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferro-boron, determine their proportion relation, and gross weight is provided is 100 kilograms of batchings.
(3) steel scrap is heated to 1500 ℃ of fusings in induction furnace, treat that molten steel is molten clear after, it is further molten more clear to add the pig iron, ferrosilicon and ferromanganese successively; After adopting the aluminium wire deoxidation of weight of molten iron 0.01% then, ferrochrome, the molybdenum-iron piece that granularity is about 5-10mm put into successively stove fusion clear after, adding granularity is about behind the ferro-boron of 5-10mm molten clear, left standstill 30 seconds, after the slagging-off of molten iron liquid level, molten iron come out of the stove rapidly pour in the casting ladle, at last molten iron is poured into the sample that the sodium silicate sand mold casting becomes 20mm * 20mm * 110mm.
(4) after the casting complete 12 hours, shake out, sampling, metallographic specimen preparation are then by examination of Vickers instrumentation and fracture toughness property Equation for Calculating Fe
3The fracture toughness property value of C phase, wherein each sample testing data is 10 groups, averages Fe then
3C fracture toughness property test result is shown in data in the table four.
The different Cr of table four, Mo add-on are to Fe
3The influence of C phase fracture toughness property value
| Cr/Mo weight percent (%) | 9.0/3.0 | 8.0/2.5 | 6.0/2.0 | 4.0/2.0 |
| Fe 3C fracture toughness property value/MPam 1/2 | 145.7 | 151.6 | 129.5 | 121.4 |
Fe by test among embodiment (), (two), (three), (four)
3C fracture toughness property value as can be seen, Cr, Mo alloying element just can make Fe compound the adding by a certain percentage
3C fracture toughness property value improves by a larger margin.
Claims (2)
1. hard phase Fe in the ordinary white cast iron
3The patent method of C is characterized in that, may further comprise the steps:
At first, determine ordinary white cast iron batching to comprise steel scrap, the pig iron, ferrosilicon, ferromanganese, and be benchmark with ordinary white cast iron batching gross weight, according to the Cr element of 1.0-10% and the Mo element of 0-3.5%, calculate respectively and take by weighing ferrochrome, molybdenum-iron and ordinary white cast iron batching;
Then, prepare burden steel scrap, the pig iron, ferrosilicon, ferromanganese of ordinary white cast iron is added melting in the stove successively, molten clear after, adopt the aluminium wire deoxidation of weight of molten iron 0.01% after, add ferrochrome again, molybdenum-iron is molten clear;
At last, treat that molten iron is molten clear after, leave standstill, remove the gred, be shaped, get final product.
2. hard phase Fe in a kind of ordinary white cast iron according to claim 1
3The patent method of C is characterized in that the granularity of described ferrochrome, molybdenum-iron is all less than 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101504607A CN101328556B (en) | 2008-07-25 | 2008-07-25 | Toughening processing method of hard phase Fe3C in plain white cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101504607A CN101328556B (en) | 2008-07-25 | 2008-07-25 | Toughening processing method of hard phase Fe3C in plain white cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101328556A CN101328556A (en) | 2008-12-24 |
| CN101328556B true CN101328556B (en) | 2010-06-23 |
Family
ID=40204562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101504607A Expired - Fee Related CN101328556B (en) | 2008-07-25 | 2008-07-25 | Toughening processing method of hard phase Fe3C in plain white cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101328556B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842037A (en) * | 2018-07-13 | 2018-11-20 | 宁国市正兴耐磨材料有限公司 | A kind of casting method improving medium chrome cast iron hardness |
-
2008
- 2008-07-25 CN CN2008101504607A patent/CN101328556B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101328556A (en) | 2008-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101497966B (en) | High-hardness hypereutectic high chromium, manganese, molybdenum and tungsten alloy wear resistant steel material and use thereof | |
| CN100436633C (en) | Low carbon high alloy steel for ball mill lining and its making process | |
| CN101775545B (en) | Low-alloy high-strength high-toughness wear-resistant steel plate and manufacturing method thereof | |
| CN102877008B (en) | Method for preparing bainite wear-resistant cast steel | |
| CN102140612A (en) | Multi-component alloy cast steel bucket tooth and production process thereof | |
| RU72697U1 (en) | STAINLESS STEEL HIGH STRENGTH STEEL BAR | |
| CN102703816B (en) | High-carbon low-alloy wear-resistant ball steel and production process thereof | |
| CN101469390A (en) | Wear resistant steel cast and method for manufacturing the same | |
| CN108998725A (en) | Track link rail 35MnBM steel and preparation method thereof | |
| CN102206784A (en) | Friction disk material | |
| CN104694827B (en) | A kind of casting high strength wear-proof medium carbon steel and preparation method thereof | |
| CN103397272A (en) | Abrasion-resistant steel plate with low crack sensitive index and high strength and preparation method thereof | |
| CN109811259A (en) | A kind of ultralow temperature wear-resisting steel plate and manufacturing method | |
| CN108950432A (en) | A kind of high-intensitive, toughness low alloy wear resistant steel and its manufacturing method | |
| CN101328557B (en) | Toughening processing method of hard phase Fe2B in iron boron wear-resistant alloy | |
| CN106868420A (en) | One kind forging superhigh intensity low-alloy wear-resistant steel and preparation method thereof | |
| US7846381B2 (en) | Ferritic ductile cast iron alloys having high carbon content, high silicon content, low nickel content and formed without annealing | |
| CN103882326A (en) | High-strength wear-resistant shovel teeth of loading machine and production technology thereof | |
| CN109811260A (en) | A kind of extremely cold area wear-resisting steel plate and manufacturing method | |
| CN101328556B (en) | Toughening processing method of hard phase Fe3C in plain white cast iron | |
| CN103114250B (en) | Level-B steel with low-temperature impact resistance at -70 DEG C and preparation method thereof | |
| JP2020132891A (en) | Mold steel having excellent thermal conductivity | |
| CN101560634A (en) | Abrasion and corrosion resistant nonmagnetic high-strength stainless steel | |
| CN1804092A (en) | Tungsten-containing wear-resistant austenitic manganese steel | |
| CN101353752A (en) | Novel CrAlTi(Y)N coating high strength nodular graphite cast iron and preparation thereof |
Legal Events
| 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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100623 Termination date: 20130725 |