CN1064633A - Method for double liquid double metal compound casting of jaw plates - Google Patents
Method for double liquid double metal compound casting of jaw plates Download PDFInfo
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- CN1064633A CN1064633A CN 91101454 CN91101454A CN1064633A CN 1064633 A CN1064633 A CN 1064633A CN 91101454 CN91101454 CN 91101454 CN 91101454 A CN91101454 A CN 91101454A CN 1064633 A CN1064633 A CN 1064633A
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- casting
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- rich chromium
- cast iron
- palate plate
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Abstract
The invention provides a kind of process of using liquid rich chromium cast iron and cast steel composite casting jaw-plate.Can make things convenient for, cast out reliably wearability height, jaw that toughness is good in this way, setting that its principal character is that the tooth bar that makes jaw in casting mold faces down, floor faces up, specification and the first rich chromium cast iron that in casting mold, quantitatively pours into 1330～1380 ℃ of fusions of designing requirement according to jaw, rich chromium cast iron cools off the cast steel foundry goods cooling that pours into 1460～1520 ℃ of fusions after 2～8 minutes again in casting mold after peeling, promptly obtains the jaw of bimetal composite casting.
Description
The present invention relates to a kind of method of double-fluid double metal composite casting palate plate, particularly use the method for the rich chromium cast iron and the cast steel casting compounded jaw plate of fusion.
Palate plate is a part easy to wear on the palate crusher.(see figure 1).Require palate plate to have good wearability and toughness during work, satisfy safe and reliable instructions for use, be convenient to again be connected with associated components on the disintegrating machine.Palate plate adopts the manufacturing of single potassium steel material mostly at present, the work hardening capacity of potassium steel must just can be not fully exerted under the working condition of intense impact, its case hardness can be increased to HB450～550 from initial HB180～220, but the palate plate on the palate crusher does not have the working condition of intense impact, therefore its case hardness of palate plate made from single potassium steel material improves few, wearability is not in full use, and service life is short.With broken compression strength is 16533N/cm
2Building stones be example, using with the palate plate of single potassium steel material manufacturing just needed tune in about 3 days, used the palate plate that will more renew in about 7 days.Shut down the number of times more than of changing palate plate, both reduced production efficiency, caused the waste of steel again, thereby increased production cost.Therefore press for a kind of wearability height, palate plate that toughness is good.That has done studies show that, is difficult to satisfy simultaneously above-mentioned requirements with the palate plate of single metal material manufacturing.Domestic existing report about bimetal composite casting wear part technology.As " research of double metallic composite material " (the 4th national metal wear resistant material academic meeting paper collection the 172nd～174 page, Shanghai University Of Electric Power, Song Linsheng); " research of white cast-iron, cast steel bimetal compound cast material and technology " (" casting " the 3rd～6 page, in November, 1988, Piao Dongxue: Shenyang Research Institute of Foundry; The flat loyalty of offering: Linyi, Shandong special steel factory); " development of bimetallic composite impact plate " (" casting " the 15th～17 page, 1988 the 4th phases, Wang Congyu: Jiangxi Machinery Science Inst.; Song Gongda: " process for casting double metals compound ball mill lining palte " (Chinese patent, application number: 881047761) Jiangxi Province's hot investment casting factory).The characteristics of bimetallic compound casting are to make wear-resisting working lining with the metal material of high rigidity, metal material with high tenacity is made laying, the mode of production with casting forms firm metallurgical binding with two kinds of metals, thereby it is good to cast out wearability, double metallic composite material that toughness is high or part.The material factors that improves the wear-resisting working lining wearability of palate plate is to select the metal material of high rigidity for use; The material factors that improves the palate plate toughness is to select the metal material with high tenacity for use, and the structural factor that improves the palate plate toughness is the thickness that the thickness of laying is greater than wear-resisting working lining; The casting method factor that improves the palate plate wearability is that two kinds of metals can not dash mixed in the casting process, dash and mix the purity that can reduce the high rigidity metal material, thereby reduce the anti-wear performance of wear-resisting working lining, be not mingled with matter and pore in the wear-resisting working lining and can make wear-resisting working lining dense micro-structure, the palate plate tooth bar macroscopic view profile that casts out just should advised; The casting method factor that improves the palate plate toughness is that the combination of two kinds of metals must be firmly, and the faying face of two kinds of metals can not produce the cold shut lamination.Clearly adopt the rich chromium cast iron of high rigidity to make the wear-resisting working layer of palate plate in the known technology, make the laying material of palate plate with the good cast steel of toughness; The shape of palate plate macroscopic view and structure are also definite; The key of so further raising palate plate wearability and toughness provides suitable casting method, to guarantee the purity of rich chromium cast iron and cast steel; Guarantee the density of wear-resisting working lining and the integrality of tooth bar macroscopic view profile; Guarantee that two kinds of metals can closely be bonded together, the faying face place of two kinds of metals does not produce cold shut and lamination.The shortcoming and defect of the casting method of known technology is: 1. reduce the bond strength of two kinds of metals for the cast steel surface Yin Gaowen that prevents to pour into earlier produces oxidation, must pour into the SIV protective agent when watering cast steel; For the not enough problem of the feeding that solves wear-resisting working lining, the measure that proposition adds inside and outside chill or establishes open riser in the casting mold die cavity, therefore whole technology more complicated.2. do not have cast steel to solidify the later direct means of testing that finishes substantially in the technology, the blanking time of two kinds of liquid metal cast is wayward.3. adopt water earlier cast steel, after water rich chromium cast iron technology gas in the motlten metal and impurity are floated on the wear-resisting working face of rich chromium cast iron material on all, cause wear-resisting working lining to organize not fine and close generation slag inclusion, shrinkage porosite phenomenon, thereby reduce the anti-wear performance of wear-resisting working lining.4. the measure that adds inside and outside chill or establish open riser in the casting mold die cavity is not suitable for casting palate plate tooth bar, and the feeding deficiency that produces during casting solidification can cause tooth bar profile irregularity, produces the performance that has reduced wear-resisting working lining owing to the defective on macroscopical profile.5. the solidus of ZG25 cast steel is about 1490 ℃, and liquidus curve is about 1525 ℃, and the solidus of rich chromium cast iron is about 1200 ℃, and liquidus curve is about 1300 ℃, and the liquidus curve of rich chromium cast iron hangs down about 225 ℃ than the liquidus curve of ZG25 cast steel.In order to guarantee two kinds of metal strong bonded, give full play to the toughness of cast steel, must make the cast steel surface that cast is earlier solidified substantially evenly be fused into the thin steel layer of one deck, this just need improve the pouring temperature of rich chromium cast iron widely, thereby has increased the scaling loss of alloying element in energy resource consumption and the rich chromium cast iron.In addition, there be not special " process of double-fluid double metal composite casting casting palate plate " in the known technology yet.
The objective of the invention is to provide the method that a kind of technology is simple, use rich chromium cast iron and cast steel casting compounded jaw plate.Can cast out wearability height, palate plate that toughness is good in this way.
Task of the present invention is finished as follows: with the method for rich chromium cast iron and cast steel casting compounded jaw plate, its characteristics are to make in the casting mold tooth bar of palate plate to face down, the floor setting that faces up, specification and designing requirement weight feed pouring temperature according to palate plate are the rich chromium cast iron of 1330～1380 ℃ of (leucoscope indicating value) fusions, and pour into casting mold by the running gate system of casting mold one end, the rich chromium cast iron that pours into casting mold cools off 2～8 minutes in casting mold after, running gate system by the casting mold other end pours into the cast steel that pouring temperature is 1460～1520 ℃ of (leucoscope indicating value) fusions again, and foundry goods cools off after peeling promptly obtains the palate plate of bimetal composite casting.
The method of casting compounded jaw plate of the present invention can the rich chromium cast iron molten iron pour into cool off 2～4 minutes in the casting mold after, pour into cast steel again.
Method of the present invention is as long as quantitatively pour into earlier the rich chromium cast iron molten iron of certain pouring temperature in casting mold, molten iron cools off the cast steel molten steel that pours into uniform temperature after 2～8 minutes again in casting mold in casting mold, can obtain the palate plate of bimetal composite casting after the cooling, so technology is simple especially.The blanking time of two kinds of casting of metals is clear and definite, grasp easily, and 2～8 minutes the time interval can make operating personnel that the sufficient activity duration is arranged.After the cast steel pouring temperature of watering to exceed about 200 ℃ than the fusion temperature of the rich chromium cast iron that waters earlier, therefore do not need to increase again the pouring temperature of cast steel, thereby under the situation that does not increase energy consumption, can make the rich chromium cast iron surface of solidifying substantially evenly be fused into one deck thin iron layer fully, two kinds of metals can closely be combined.Rich chromium cast iron is formerly watered in creative performance of the present invention, after water cast steel and known technology to water the program of watering rich chromium cast iron behind the cast steel earlier just in time opposite.The invention has the advantages that and water cast steel after watering rich chromium cast iron earlier, therefore impurity in two kinds of motlten metals and bubble float to the cast steel top layer on all, just dense by the wear-resisting working lining tissue that the rich chromium cast iron material constitutes, tooth bar macroscopic view neat appearance on the wear-resisting working lining, the combination of two kinds of metals is firm.Observation through the palate plate test specimen of casting with the inventive method is done: the neat appearance of palate plate upper rack; The faying face place macroscopic observation of two kinds of metals connects evenly, no slag inclusion, shrinkage cavity, shrinkage porosite, lamination, the metallographic microanalysis (see figure 6) shows that also the faying face junction is even, fine and close, reached the excellent metallurgical joint, though float to cast steel top layer (being on the floor of palate plate) on impurity in two kinds of motlten metals and the bubble, but cast steel is only made laying, so the contained impurity in cast steel top layer and pore there is no much influences to the use of whole palate plate.The rich chromium cast iron of casting with the inventive method, the palate plate of cast steel are tested on 250 * 400 palate crusher, and compare group with the palate plate of same size potassium steel material, are 16533N/cm to compression strength
2Stone carry out fragmentation.The conclusion that is drawn is: the palate plate of bimetal composite casting adapts to broken condition of work fully, is that 250mm, length are the big building stones of 350～400mm when falling at diameter, in the same old way can be successfully broken.The tune in 3 days of potassium steel material palate plate will change in 7 days, and the tune in 24～26 days of the palate plate of bimetal composite casting was changed in 48～52 days, obviously improved service life, had reduced significantly to shut down to adorn and had changed number of times, had improved the running rate of disintegrating machine.Following table is potassium steel material palate plate and rich chromium cast iron, the cast steel palate plate about roll the stone time, roll the stone amount, the comparison sheet of the residual heavy and relative weight loss of palate plate.
| Numbering | Roll the stone time (hour) | Roll stone amount (ton) | Palate plate original weight (kilogram) | Palate plate residual heavy (kilogram) | Relative weight loss (gram/ton) | |
| Potassium steel material palate plate | 1 | 67 | 850 | 90 | 62 | 32.94 |
| 2 | 67 | 830 | 90.5 | 63 | 33.13 | |
| Rich chromium cast iron cast |
3 | 342 | 4505 | 89 | 61 | 6.222 |
| 4 | 360 | 4590 | 90 | 61.5 | 6.209 |
From above-mentioned table as can be seen, two kinds of palate plates that weight is substantially the same, the palate plate that rolls stone time ratio potassium steel material of the palate plate of the inventive method casting has increased more than 290 hour; Rolling the stone amount increases by 500 many; Relative weight loss reduces more than 5 times.The residual body wear surface of the palate plate light of casting with the inventive method, cut obviously dwindle than the palate plate of potassium steel material and also cut shallow, the palate plate that proof is cast with the inventive method has good wear resistance, uses this palate plate can reduce the rubble cost on the disintegrating machine, saves steel.In 52 days duration of test, the bimetallic of not finding palate plate is in conjunction with having any crack on the face and on the floor of palate plate, and therefore the palate plate of casting with this method has good toughness.
Below with reference to embodiment and accompanying drawing thereof method of the present invention is described in further detail.
Fig. 1 is the stereogram of palate plate.
Fig. 2 is the front view of palate plate.
Fig. 3 is along the cutaway view of A-A line among Fig. 2.
Fig. 4 is a casting mold inner chamber plane.
Fig. 5 is the longitudinal section of casting mold.
Fig. 6 is the metallographic structure microphoto of rich chromium cast iron, cast steel and binder course thereof.
Consult Fig. 1～Fig. 3, the wear-resisting working lining of palate plate comprises that the laying of tooth bar 1, palate plate comprises that there is flange 3 left and right sides of floor 2, palate plate laying, has dovetail groove 4, flange 3 to be convenient to the relevant parts with disintegrating machine of palate plate with dovetail groove 4 in the middle of the two ends up and down and is connected.The distance of the tooth root to two of wear-resisting working lining middle rack a kind of metal faying face is 2/5～3/5 of a tooth depth.The toughness of palate plate improves with the thickness increase of cast steel laying.The rich chromium cast iron material, its composition meets GB8263-87 standard, W
0=2.2～2.8%; W
Cr=13～18%; W
Mo=0.5～2.5%; W
Cu=0～1.2%; W
Mn=0.5～1.0%; W
Si≤ 1%; W
p≤ 0.1%; W
S≤ 0.06%.The laying of palate plate adopts ZG230～450 cast steels: its composition meets GB5676-85 standard, W
0=0.3%; W
Si=0.5%; W
Mn=0.9%; W
S=0.04%; W
p=0.04%.Melting is carried out in two 150 kilograms of intermediate frequency furnaces simultaneously, a melting rich chromium cast iron, melting ZG230～450 cast steels.Furnace charge adopts ferrochrome, molybdenum-iron, a little copper, the pig iron and steel scrap.The tapping temperature of rich chromium cast iron is 1400～1450 ℃, and pouring temperature is 1330～1380 ℃.ZG230～450 cast steel tapping temperatures are 1530～1580 ℃, and pouring temperature is 1460～1520 ℃.The tooth bar of consulting palate plate in Fig. 4, Fig. 5 casting mold faces down, floor faces up is provided with the rich chromium cast iron that is poured into 1330～1380 ℃ of fusions when pouring into a mould earlier by the running gate system 5 of casting mold one end, treat its cooling 2～8 minutes, preferably pour into ZG230～450 cast steels of 1460～1520 ℃ of fusions after 2～4 minutes (using manual time-keeping) again by the running gate system 6 of the casting mold other end.Obtained by experiment the blanking time of two kinds of pouring metal melts, and said temperature is the indicating value of leucoscope.After treating that foundry goods cools off substantially, can carry out peeling work, obtain the palate plate of bimetal composite casting.Its toughness of single rich chromium cast iron α
k=5～7J/cm
2, after rich chromium cast iron and cast steel were cast the bimetallic compound casting, its toughness can significantly improve, situation of change such as following table:
| Cast steel bed thickness/rich chromium cast iron bed thickness (mm) | α k(J/cm 2) |
| 2.5/7.5 | 10.3 |
| 6/4 | 110.0 |
| 7.5/2.5 | 152.1 |
Consult Fig. 6, the figure bottom is typical rich chromium cast iron tissue, and figure top is typical ZG230～450 cast steel tissues, and middle black band shape is the combination band of rich chromium cast iron and cast steel, and its width reaches 55～80 μ.Composition is between rich chromium cast iron and cast steel.The metallography microscope photo shows that two kinds of materials connect even compact, and defectives such as nothing is mingled with, shrinkage porosite have reached the excellent metallurgical combination.
Claims (2)
1, a kind of method of using liquid rich chromium cast iron and cast steel casting compounded jaw plate, the tooth bar (1) that it is characterized in that making in the casting mold palate plate faces down, floor (2) setting that faces up, specification and designing requirement weight feed pouring temperature according to palate plate are the rich chromium cast iron of 1330～1380 ° of c (leucoscope indicating value) fusion, and pour into casting mold by the running gate system (5) of casting mold one end, the running gate system (6) that the rich chromium cast iron that pours into casting mold cools off in casting mold after 2～8 minutes by the casting mold other end again pours into the cast steel that pouring temperature is 1460～1520 ° of c (leucoscope indicating value) fusion, foundry goods cooling promptly obtains the palate plate of bimetal composite casting after peeling.
2, the method for casting compounded jaw plate according to claim 1, it is characterized in that the rich chromium cast iron molten iron pour into cool off 2～4 minutes in the casting mold after, pour into cast steel again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101454 CN1022674C (en) | 1991-03-07 | 1991-03-07 | Method for double liquid double metal compound casting of jaw plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101454 CN1022674C (en) | 1991-03-07 | 1991-03-07 | Method for double liquid double metal compound casting of jaw plates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1064633A true CN1064633A (en) | 1992-09-23 |
| CN1022674C CN1022674C (en) | 1993-11-10 |
Family
ID=4905097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91101454 Expired - Lifetime CN1022674C (en) | 1991-03-07 | 1991-03-07 | Method for double liquid double metal compound casting of jaw plates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1022674C (en) |
Cited By (7)
| 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 |
| CN1311938C (en) * | 2005-02-03 | 2007-04-25 | 王惠臣 | Continuous double-metal cast forming method |
| CN102189245A (en) * | 2010-11-17 | 2011-09-21 | 王惠臣 | Lost foam casting technological method for casting double-metal double-liquid composite crusher hammer |
| CN102873308A (en) * | 2012-10-09 | 2013-01-16 | 西安交通大学 | Method for lost foam casting of composite two-liquor bimetallic hammerhead of crusher |
| CN104588436A (en) * | 2014-12-24 | 2015-05-06 | 天津理工大学 | Method for preparing composite pipe by expanding secondary pouring dual-metal pipe billets |
| CN105127369A (en) * | 2015-09-10 | 2015-12-09 | 安庆银泰轴承有限公司 | Casting technology of bearing inner sleeve of air conditioner |
| CN101970154B (en) * | 2008-03-06 | 2016-03-30 | 海斯勒霍尔姆工具联合有限公司 | The composite casting method of single-piece cast member instrument |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921927B (en) * | 2012-11-15 | 2014-06-11 | 北京工业大学 | Preparation method of double-liquid bimetal composite wear-resistant lining board |
-
1991
- 1991-03-07 CN CN 91101454 patent/CN1022674C/en not_active Expired - Lifetime
Cited By (7)
| 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 |
| CN1311938C (en) * | 2005-02-03 | 2007-04-25 | 王惠臣 | Continuous double-metal cast forming method |
| CN101970154B (en) * | 2008-03-06 | 2016-03-30 | 海斯勒霍尔姆工具联合有限公司 | The composite casting method of single-piece cast member instrument |
| CN102189245A (en) * | 2010-11-17 | 2011-09-21 | 王惠臣 | Lost foam casting technological method for casting double-metal double-liquid composite crusher hammer |
| CN102873308A (en) * | 2012-10-09 | 2013-01-16 | 西安交通大学 | Method for lost foam casting of composite two-liquor bimetallic hammerhead of crusher |
| CN104588436A (en) * | 2014-12-24 | 2015-05-06 | 天津理工大学 | Method for preparing composite pipe by expanding secondary pouring dual-metal pipe billets |
| CN105127369A (en) * | 2015-09-10 | 2015-12-09 | 安庆银泰轴承有限公司 | Casting technology of bearing inner sleeve of air conditioner |
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| Publication number | Publication date |
|---|---|
| CN1022674C (en) | 1993-11-10 |
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Expiration termination date: 20110307 Granted publication date: 19931110 |