CN1016235B - White cast-iron and cast steel bimetal composite casting - Google Patents
White cast-iron and cast steel bimetal composite castingInfo
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- CN1016235B CN1016235B CN 86106682 CN86106682A CN1016235B CN 1016235 B CN1016235 B CN 1016235B CN 86106682 CN86106682 CN 86106682 CN 86106682 A CN86106682 A CN 86106682A CN 1016235 B CN1016235 B CN 1016235B
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- casting
- cast
- composite casting
- bimetallic
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Abstract
White cast-iron of the present invention and cast steel bimetal composite casting; belong to the double-metal composite casting process method; it adopts " jar casting " and " biliquid " two kinds of composite casting technology methods; feature is to have adopted bimetallic promptly to protect cleaning under the binding site high temperature in conjunction with position protective agent SW; created condition for the bimetallic junction mixture simultaneously; and bimetallic in conjunction with and about transition zone (deliquescent layer) thickness 40～100 μ; make bimetallic in conjunction with functional; reliably; technology is easy; and economical, can produce not only require higher impact property but also have wear resistence respectively good; good heat resistance; the various parts that properties such as corrosion resistance is good require.
Description
The invention belongs to the composite casting technology method of double-metal composite casting process method, particularly white cast-iron and carbon steel or potassium steel.
Present bimetal composite casting spare, a kind of is the method for EP0130626.It is characterized in that first kind of metal surface is covered with oxide-free flux coating, first kind of metal is positioned at casting mold, and casting mold places in the heating furnace, after first kind of metal at first is heated, pours into a mould second kind of metal again.And first kind of metal of this technology bimetal composite casting method do not need any coating, only is conventional pickling, shot-peening or blasting treatment, or with S IV protective agent clean surface; And this process prefabricated component is general to be heated with second kind of molten metal, and less than 10 o'clock, its pre-heating mean can be used blowtorch, electric furnace heating etc., rather than casting mold is cast in heating furnace in foundry goods and prefabricated component weight ratio.
Present bimetal composite casting spare, another kind is US3.901,473 method.It is characterized in that the composite casting roll.Behind a kind of liquid metal solidification certain thickness, dump out the not solidified metal of core, pour into a mould another kind of liquid metal again and solidify at the center.And this process not only can be used for the composite roll casting, also can be used for various flat part etc.A notable feature is that this technology is the high temperature protection agent of S IV at bimetallic in conjunction with position employing code name again, and this protective agent together pours into casting mold with first kind of metal, prevents first kind of burning, promotes bimetallic combination.
The objective of the invention is the White Cast Iron Material with wear-resistant grinding abrasion performance and carbon steel or high manganese steel material with high tenacity are made the single-casting with two kinds of material double gradings by the method for bimetal composite casting.Be characterized in having adopted bimetallic in conjunction with face high temperature protection agent S IV; and form the thick transition zone in the 40-100 μ left and right sides in conjunction with face at bimetallic; thereby the abrasion resistance (or heat-resisting, corrosion resisting property) and the obdurability of foundry goods have been improved simply, reliably; and require to be disposed, thereby the mechanical performance and the serviceability of foundry goods have been improved according to the different performance at each position of part in using.
This technology also can be used for cast steel and copper, in the production of the bimetallic compound casting of cast steel and other cast iron materials.
Content of the present invention:
The used mother metal of the present invention is carbon steel or the high manganese steel material with obdurability, and anti-friction material is a white cast-iron.
Double-metal composite casting process of the present invention has two kinds of technologies.
A kind of is to make wear-resistant prefabricated component in advance by white cast-iron, is fixed on the casting mold of foundry goods working position after cleaning, and by technological requirement melted molten steel is poured in the bimetallic casting mold then, and this technology abbreviates " imbedding process " as.
A kind of is by this technological requirement, and melted molten steel is poured into earlier in the casting mold, will refine good white cast-iron again, pours in the same casting mold, will obtain the bimetallic compound casting, and this technology abbreviates " biliquid " bi-metal casting process as.
Double-metal composite casting process of the present invention; using code name at bimetallic in conjunction with face is the protective agent of S IV; it has light specific gravity; fusing point is low; the gasification temperature height; good fluidity; good with the steel wettability; good and the characteristics such as ability is strong of derusting of high-temperature oxidation resistance; implement in this technical process, it effectively protects cleaning and the anti-oxidation of bimetallic in conjunction with (950-1400 ℃) under the face high temperature, and impels the heat exchange of two kinds of materials; impel two kinds of main alloy element phase counterdiffusion in the metal material, to form transitional region intermediate alloy and middle transition metal structure.
The protectant composition of S IV is:
Na
2SO
40.2-5% Na
2B
4O
7·10H
2O5.0-70%
Na
2CO
30.5-25% CaCO
30.1-5.0%
K
3Po
40.5-25% Na
3PO
40.5-25%
NaCL 2.0-40% sodium base glass 0.3-3.0%
SiO
20.1-10%
Compound casting of the present invention described " iron chains casting " process:
One) preparation of wear-resistant prefabricated section
1, wear-resistant prefabricated component material will comply with the national standard requirements.
2, the castability of wear-resistant prefabricated component requires to perfect, and casting flaw must not be arranged, and the surface must be cleaned, and oxidation and corrosion phenomena must not be arranged, and filths such as remaining greasy dirt must not be arranged, and generally adopts pickling or shot-peening, blasting treatment, makes cleaning surfaces.Its surface is cleaned in the agent of available S IV.
Two) the fixing and preheating of the wear-resistant prefabricated component of hard
The method of the fixedly internal densener that the fixedly employing general casting technique of the wear-resistant prefabricated component of hard in die cavity is commonly used, or other fixing means such as foamed plastics is fixed or core palm fixing means etc.Determine that according to the weight ratio of foundry goods and prefabricated section it gives by the use of thermal means and gives hot temperature again.When ratio greater than 10 the time, give heat by the thermal capacity of the mother metal that is full of casting mold.When the weight ratio of foundry goods and prefabricated component less than 10 the time, must carry out the necessary heat of giving to prefabricated component in the die cavity and casting mold, in casting mold, offer simultaneously and use the overflow launder that mother metal high temperature gives necessity of hot preform, after making base metals be full of die cavity, it is liquid that base metals around the preform kept in a period of time, the cast steel that pours in the die cavity contacts with prefabricated component and mould wall, must cause heat loss, cause cooling, and the temperature of preform and cast steel binding site will keep a period of time more than the molten steel fusing point, otherwise the bimetallic compound casting that can not get perfecting.Theoretically, implement on the necessary condition of this technology:
Q
Ⅰ-（Qs+Qc）＞QⅡ
In the formula: Q
I-pour into the total thermal capacity of cast steel in the die cavity
Needed thermal capacity when Qs-preform top layer reaches fusing point own
Qc-casting mold factors are warmed up to cast steel fusing point needed thermal capacity (for characteristics foundry goods and characteristic craft, Qc is a constant) when above
The thermal capacity that cast steel has when fusing point in Q II-casting mold
" biliquid " of the present invention double-metal composite casting process is meant that cast steel liquation (carbon steel or potassium steel) and white cast-iron liquid pass through running gate system separately, successively pours in the same casting mold, obtains the bimetallic compound casting.The thickness of two kinds of materials, determine according to the service condition of foundry goods: when the parts depreciation degree less than the quick-wear part cumulative volume 50% the time, the steel layer thickness selects to adopt greater than chill and when the casting chilling technology.And relatively poor when stress, the parts depreciation degree is greater than 50% when above of quick-wear part overall degree, and then the steel layer thickness is selected less than chill thickness, and adopts cold technology in surface chill technology and the inside on casting technique.The steel layer thickness is controlled by the position observation hole of offering in advance in the casting mold.During casting, water the cast steel layer earlier, back cast chill.For guaranteeing bimetallic in conjunction with good, bimetallic must make the binding site cleaning with S IV protective agent in conjunction with the position, and anti-oxidation.When cast during white cast-iron, protective agent by the molten iron stream swash of wave in the casting mold in the overflow launder.Two kinds of casting of metals time intervals are decided by the steel layer temperature of pouring into a mould earlier.General temperature is advisable at 900-1400 ℃.
Controlling two kinds of casting of metals time intervals well is crucial technological parameters in " biliquid " bi-metal casting process.This technology shows through the result of test of many times, as long as steel laminar surface-be bimetallic in conjunction with face on, owing to washing away of high temperature spoken parts in traditional operas molten iron forms the layer of even melting layer, simultaneously, it is liquid that white cast-iron layer molten metal can keep in a period of time, just can obtain desirable composite casting.
When adopting " biliquid " bimetal composite casting method, its protective agent must be poured in the cast steel die cavity when watering the cast steel layer.
The made foundry goods of double-metal composite casting process of the present invention is heat-treated by other composite casting heat treatment common process.
The casting technique of composite casting must be considered the abundant feeding and the surface quality problems of white cast-iron part, and the present invention uses the technology and the technology of offering outer rising head of external chill in adding usually according to the structure of foundry goods.
Double-metal composite casting process of the present invention, can produce arbitrarily, the impact property of promptly having relatively high expectations, also require simultaneously good (the perhaps good heat resistance of wear resistence, perhaps corrosion resistance is good) etc. the various quick-wear parts that require of property, make quick-wear part have two kinds of material behaviors simultaneously concurrently, the bimetallic integral body of being cast by two kinds of materials is good, reliable, durable to reach its serviceability, economic purpose.S IV protective agent light specific gravity used in the present invention, fusing point is low, the gasification temperature height; have very strong derusting and anti-aging capability, and have good wet performance, it is low that S IV protective agent also has a cost; its raw material have easily been bought, and make easyly, characteristics such as can use repeatedly.
Therefore compared with prior art technology is simple in the present invention, dependable performance.
The main alloy element that adopts the bimetallic compound casting binding site of technology manufacturing of the present invention to contain is regular and changes, promptly in the transitional region from the steel layer to chill, the content of main alloy element such as C, Cr, Si, Mo, Cu, Mn progressively increases, and its content is higher than cast steel and is lower than white cast-iron.
Bimetallic has following several characteristics in conjunction with the position tissue:
1, bimetallic all presents transitional region and transition tissue in conjunction with the position behind bi-metal casting process, and its obvious transition zone width is about 40-100 μ, and its tissue has hypereutectoid steel and hypoeutectic white iron feature.By the transition tissue that the granule carbide of even dispersion distribution in pearlite and a small amount of cryptocrystalline martensite matrix is formed, organically connect distinct two kinds of tissues of cast steel layer and white cast-iron layer.
2, be the boundary with the bimetallic transition zone, two kinds of original metallographic structures of each self-sustaining of metal material oneself and mechanical property characteristics, be that the white iron layer presents the tissue characteristic of typical hypoeutectic white iron and the characteristics of good abrasion resistance, the cast steel layer presents the tissue characteristic and the characteristic that has than high-strength tenacity of typical sub-eutectoid steel.
3, the tissue of two kinds of metal materials of close bimetallic transitional region is thinner than two kinds of material structures away from the bimetallic transitional region, is evenly distributed, and has thin equiax crystal crystallization characteristics.
4, transitional region matrix crystal structure is identical with the white cast-iron crystal structure with steel, new texture structure do not occur.
5, the transition metal main component of bimetallic transitional region belonged to and rolled over steel altogether.
Bimetallic is organized in conjunction with the position:
Fig. 1, steel layer tissue
Fig. 2, steel layer+white cast-iron layer tissue
Fig. 3, transition region tissue
Fig. 4, white cast-iron layer tissue
Fig. 5, the metallographic structure of " castingin " composite casting
Fig. 6, the metallographic structure of " biliquid " composite casting
The bond strength of bimetal composite casting material and mechanical property:
The bond strength of bimetal composite casting material must be between the bi-material mechanical property, and only in this way the serviceability of guarantee foundry goods reaches safe, reliable, durable target.
The double metallic composite material bond strength
Tensile strength torsional strength ultimate shearing strength
The numbering remarks
（σbN/mm
2） （N/mm
2） （N/mm
2）
S-1 350.0; 325.0; 314.0 425.5; 434.3; 436.1-1. tensile test piece is all disconnected
At the chill position;
S-2 363.0;334.0;355.0 490 440 530 -
2. torsional specimen is all disconnected
S-3 306.5; 326.5; 310.5-743 760 768 at the cast steel layer.
Double metallic composite material impact flexibility (20 * 20 * 110) J/cm2
Single high chromium double metallic composite material
Remarks
White cast-iron spoken parts in traditional operas 10/ steel 10 spoken parts in traditional operas 5/ steel 15 spoken parts in traditional operas 15/ steel 5
〉=8.0 30KG-M 30KG-M 48.00 steel layer actual (real) thickness
The white shock machine shock machine 76.50 of high tenacity is 0.54mm;
Mouth cast iron is beaten and is constantly beaten continuous 79.30 steel layer actual (real) thickness
0.67mm
Double metallic composite material transition region microhardness
Position microhardness (HV100)
Chill 724
Transition region 514
Steel layer (near transition region) 254
Bimetal composite casting embodiment
Below two kinds of materials and chemical analysis thereof among the listed embodiment as follows:
" castingin " double-metal composite casting process embodiment 1
12 kilograms of tups of foundry goods title: φ 1250 set hammer formula disintegrating machines
Wear-resistant castingin preform is made through the static state casting by the high-chromium white cast iron of this specification defined.It is of a size of (5-15) * (20-30) * (40-70) millimeter, and the rectangle preform disposes the 3-6 piece uniformly on the working position of a tup, and its quality must satisfy the requirement of this specification defined.
Wear-resistant preform surface must be cleared up by the requirement described in this specification, with the surface that keeps clean.
By the requirement of this specification, wear-resistant preform is fixed in the tup casting mold, after being preheated to 450-650 ℃, pour into a mould melted 45# cast steel with blowtorch or molten steel, just obtain as cast condition castingin composite casting tup.
As cast condition bimetallic composite hammer head is heat-treated with cabinet-type electric furnace, and its technology is: be warming up to 550-650 ℃ by room temperature or 200 ℃ ± 50 ℃, be incubated 1 hour and be warming up to 860-980 ℃ again, be incubated 4 hours, shrend, be warming up to 200 ℃ of insulations 3 hours by room temperature again, the air cooling.
" biliquid " double-metal composite casting process embodiment 2
Foundry goods title: φ 1250 * 1250 type impact breaker bars
Used bimetal composite casting should meet the composition requirement of the high-chromium white cast iron and the 45# cast steel of this specification defined with material main composition.
" biliquid " casting mold available water glass self-curing mo(u)ld or clay dry type.
By the cast steel running gate system in " biliquid " casting technique; pour into 45# cast steel earlier; meanwhile; the cast bimetallic is in conjunction with face high temperature protection agent S IV; cast steel layer thickness locating hole is controlled at the 30-40 millimeter, and when the cast steel layer all solidifies (cast cast steel after 1.0-2.5 minute), bondline is in the time of 900-1400 ℃; by high-chromium white cast iron running gate system cast high-chromium white cast iron, just can obtain as cast condition double-fluid double metal bar.
As cast condition " biliquid " bimetal composite casting board hammer is heat-treated with cabinet-type electric furnace, and its Technology for Heating Processing is: be warming up to 550-650 ℃ by room temperature or 200 ℃ ± 50 ℃, be incubated 1 hour, be warming up to 890-910 ℃ again, and then be incubated 4 hours, air quenching.Be warming up to 400-450 ℃ by room temperature again, be incubated 4 hours, air cooling.
Promptly can be made into bimetal composite casting tup and bar by above-mentioned two kinds of technologies.
Claims (7)
1, composite casting technology adopts the method realization cast iron of " iron chains casting " and the bimetal composite casting of cast steel, and it is characterized in that: its necessary condition of iron chains casting process of employing is:
(1)Q
1-(Qs+Qc)＞QⅡ
Q in the formula
1-pour into the total thermal capacity of cast steel in the die cavity
The thermal capacity that needs when Qs-preform top layer reaches fusing point own
Qc-casting mold factors are warmed up to the thermal capacity that the cast steel fusing point needs when above
(for characteristics foundry goods and characteristic craft, Qc is a constant)
The thermal capacity that cast steel has when fusing point in Q II-casting mold
(2) will guarantee that the cast steel mother metal pours into the interior a period of time temperature of casting mold and is higher than more than the mother metal fusing point, foundry goods and wear-resistant preform weight ratio are given heat less than 10 o'clock needs, make the mother metal surface have the thick scope of 40-100 μ to be in molten state.
2, composite casting technology as claimed in claim 1 is characterized in that: it gives by the use of thermal means can be with the blowtorch heating etc., offers in casting mold simultaneously and uses the overflow launder that mother metal high temperature gives hot preform.
3, as claim 1,2 described composite casting technologies, it is characterized in that adopting high temperature protection agent S IV with the clean surface in conjunction with the position at bimetallic, its composition is:
Na
2B
4O
7·10H
2O 5.0-7.0%
Na
2SO
40.2-5%
K
3PO
40.5-25%
Na
3PO
40.5-25%
NaCl 2.0-40%
Sodium base glass 0.3-3%
SiO
20.1-1.0%
CaCO
30.1-5.0%
4, composite casting technology adopts the method realization cast iron of " biliquid " and the bimetal composite casting of cast steel, it is characterized in that bimetallic in conjunction with position application high temperature protection agent S IV, and its composition is:
Na
2B
4O
7·10H
2O 5.0-7.0%
Na
2SO
40.2-5%
K
3PO
40.5-25%
Na
3PO
40.5-25%
Nacl 2.0-40%
Sodium base glass 0.3-3%
SiO
20.1-1.0%
CaCO
30.1-5.0%
This protective agent can be used on cast steel and copper and cast steel and other cast iron compound casting faying face;
Simultaneously, bimetallic is about 40-100 μ in conjunction with the obvious transition region thickness in position.
5, double-metal composite casting process as claimed in claim 4, when it is characterized in that adopting " biliquid " bimetal composite casting method, being chosen as of the thickness of chill and steel layer: when the parts depreciation degree less than the quick-wear part cumulative volume 50% the time, chilling technology is adopted in the selection of steel layer thickness greater than chill and when casting, and it is relatively poor to work as stress, the parts depreciation degree is greater than 50% when above of wearing part cumulative volume, then the steel layer thickness is selected less than chill thickness, and on casting technique, adopting cold technology in surface chill technology and the inside, the definite of thickness controls by giving the position observation hole of offering earlier in the casting mold.
6, double-metal composite casting process as claimed in claim 4, what use when it is characterized in that adopting " biliquid " bimetal composite casting method is to pour into a mould the steel layer earlier, back cast chill, two kinds of casting of metals time intervals are decided by the steel layer temperature of pouring into a mould earlier, and general temperature is advisable at 900-1400 ℃.
7, double-metal composite casting process as claimed in claim 4, when it is characterized in that adopting " biliquid " bimetal composite casting method, its protective agent must be poured in the cast steel die cavity when watering the cast steel layer simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86106682 CN1016235B (en) | 1986-10-11 | 1986-10-11 | White cast-iron and cast steel bimetal composite casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86106682 CN1016235B (en) | 1986-10-11 | 1986-10-11 | White cast-iron and cast steel bimetal composite casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86106682A CN86106682A (en) | 1988-04-20 |
| CN1016235B true CN1016235B (en) | 1992-04-15 |
Family
ID=4803320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86106682 Expired CN1016235B (en) | 1986-10-11 | 1986-10-11 | White cast-iron and cast steel bimetal composite casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016235B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039204C (en) * | 1993-08-18 | 1998-07-22 | 余杭县瓶窑合金钢铸造厂 | Method for casting compounded jaw plate of liquid high chrome cast iron and cast steel |
| CN1063993C (en) * | 1998-05-15 | 2001-04-04 | 李铁顺 | Composite steel sheet billet and manufacturing method thereof |
| CN1311938C (en) * | 2005-02-03 | 2007-04-25 | 王惠臣 | Continuous double-metal cast forming method |
| CN100340360C (en) * | 2005-12-30 | 2007-10-03 | 张立富 | Method for casting high manganese steel composite gear, and high manganese steel composite casted gear |
| SE532450C2 (en) * | 2008-03-06 | 2010-01-19 | Camito Ab | Composite molded tool |
| CN102071382B (en) * | 2011-01-14 | 2012-08-22 | 南京信息工程大学 | Corrosion-resistant white cast iron material and preparation method thereof |
| CN102773463A (en) * | 2012-08-01 | 2012-11-14 | 烟台路通精密铝业有限公司 | Preparation process of dual-metal engine cylinder composite material |
| CN102847880B (en) * | 2012-09-07 | 2015-04-08 | 安岳县金龙机械制造有限公司 | Special material co-casting cast production process |
| CN103056339A (en) * | 2012-12-25 | 2013-04-24 | 江苏联兴成套设备制造有限公司 | Casting technique of cross-beam temperature measuring device of blast furnace |
| CN103394672A (en) * | 2013-07-04 | 2013-11-20 | 广西玉柴机器股份有限公司 | Method for casting iron casting |
| DE102013219784A1 (en) * | 2013-09-30 | 2015-04-02 | Federal-Mogul Friedberg Gmbh | Slip rings with leatherburitic structure on the surface |
| CN105251973B (en) * | 2014-07-17 | 2020-03-24 | 乔治费希尔有限责任公司 | Compound casting |
| CN105458224B (en) * | 2014-08-28 | 2020-02-21 | 上海海立电器有限公司 | Compressor and manufacturing method of composite frame thereof |
| CN104942243A (en) * | 2015-06-02 | 2015-09-30 | 苏州晓锋知识产权运营管理有限公司 | Manufacturing method for copper-iron compound alloy |
| CN108788101B (en) * | 2018-07-20 | 2020-03-24 | 广东省焊接技术研究所（广东省中乌研究院） | Preparation method of sheet nickel-based superalloy |
| CN109877277A (en) * | 2019-03-21 | 2019-06-14 | 重庆大学 | A method of casting thick-walled casting |
| CN110421149B (en) * | 2019-08-22 | 2021-05-04 | 东营市泰达石油装备有限责任公司 | Bimetal composite material, preparation method and application thereof, wear-resistant accessory and mining equipment |
-
1986
- 1986-10-11 CN CN 86106682 patent/CN1016235B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86106682A (en) | 1988-04-20 |
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