CN105779859B - A kind of double rare-earth-doped modification antiwear cast iron alloys and preparation method - Google Patents
A kind of double rare-earth-doped modification antiwear cast iron alloys and preparation method Download PDFInfo
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- CN105779859B CN105779859B CN201610289488.3A CN201610289488A CN105779859B CN 105779859 B CN105779859 B CN 105779859B CN 201610289488 A CN201610289488 A CN 201610289488A CN 105779859 B CN105779859 B CN 105779859B
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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
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention is to provide a kind of double rare-earth-doped modification antiwear cast iron alloys and preparation method.Configuration weight percent content is C：3.1~3.2%, Si：0.9%th, Mn：0.6%th, Cu：1.0~1.5%, P：0.2~0.4%, B：0.02~0.04%, S：The mixture of 0.0005% and Fe；In smelting furnace, by the raw material of configuration in 1500~1550 DEG C of meltings, molten iron is obtained；La is added before casting ladle：0.01~0.4%, Ce：0.01~0.7%, pour into casting ladle in being wrapped and breed afterwards, the incubation time is 10 ± 2 minutes, and the tapping temperature of molten iron is 1400~1450 DEG C；Casting obtains double rare-earth-doped modification antiwear cast iron alloys.Cost of the present invention is low, wearability is high, and suitable for friction members such as cylinder sleeve or piston ring such as manufacture automobile, ships, and technique is simple.
Description
Technical field
The present invention relates to a kind of cast iron, specifically a kind of antiwear cast iron alloy.The present invention also relates to a kind of resistance to
Grind the preparation method of alloy cast iron.
Background technology
Cast iron is the polynary ferrous alloy based on Fe-C-Si, its chemical composition (mass fraction) scope substantially C：
2.0%~4.0%, Si：1.0%~3.0%, Mn：0.1%~1.5%, P：0.05%~1.0%, S：0.02%~
0.25%.It can be cast on this component base by adding the method for other metallic elements to obtain the alloy with different performance
Iron.
During steel casting, rare earth element can be added in molten iron as nodulizer, refining agent and desulfurizing agent, can
The casting character of obvious optimization cast iron, improves surface quality, reduces cast(ing) surface crackle, stomata, shrinkage cavity, reduction segregation situation hair
It is raw.And the preferable vermicular cast iron of wearability is obtained, suitable for manufacture heavy machine tool lathe bed, engine base, piston ring, hydraulic part etc..
Existing vehicle, ship equal power device cylinder jacket material are mainly high-performance cast iron materials, and cylinder sleeve cast iron has castability
Can good, good heat conductivity, damping good, the advantages that machinability is good, but its crocking resistance needs to be further improved.
Basic technology research of the external advanced Diesel Engine Manufacturers to casting technique takes much count of, especially low-speed diesel engine gas
The overall quality level of cylinder sleeve is very high.And research of the domestic overall high-power diesel engine manufacturing enterprise to casting technique basic technology
It is not deep enough, fail to grasp moulding, melting, the control law breed, pour into a mould etc., cylinder liner casting technology level is relatively
It is low, cause the physical dimension of cylinder jacket and allowance is big, surface quality is poor, dimensional accuracy is low, local has casting flaw, group
Knit the series of malpractice such as uneven, segregation is serious.
Single Rare-Earth Element Lanthanum or cerium are adulterated during the visible cast iron of association area, but its wearability is not discussed, and
Integrated performance index, which is not known, to be pointed out.The specific addition of double rare earth mixing and dopings and rare earth element is to alloy structure of cast iron performance shadow
Loud system research also has no report.
The content of the invention
It is an object of the invention to provide a kind of cost is low, wearability is high, suitable for cylinder sleeves such as manufacture automobile, ships or
Double rare-earth-doped modification antiwear cast iron alloys of the friction members such as piston ring.It is simple the present invention also aims to provide a kind of technique
Double rare-earth-doped modification antiwear cast iron alloys preparation method.
The object of the present invention is achieved like this：
Double rare-earth-doped modification antiwear cast iron alloys of the present invention are C by percentage by weight：3.1~3.2%, Si：
0.9%th, Mn：0.6%th, Cu：1.0~1.5%, P：0.2~0.4%, B：0.02~0.04%, S：0.0005%th, La：0.01~
0.4%th, Ce：0.01~0.7%, the Fe of surplus and inevitable impurity are made.
C, Si, Mn, Cu, P, B, S and Fe member are obtained by raw material of 45 steel, the pig iron, ferrophosphorus, ferromanganese, ferro-boron, ferrosilicon and copper
Element.
The ratio of La and Ce is La accounts for 30~40wt%, Ce accounts for 60~70wt%.
The preparation method of double rare-earth-doped modification antiwear cast iron alloys of the present invention is：
(1) using 45 steel, the pig iron, ferrophosphorus, ferromanganese, ferro-boron, ferrosilicon and copper as raw material, preparation weight percent content is C：
3.1~3.2%, Si：0.9%th, Mn：0.6%th, Cu：1.0~1.5%, P：0.2~0.4%, B：0.02~0.04%, S：
The mixture of 0.0005% and Fe；
(2) in smelting furnace, by the raw material of configuration in 1500~1550 DEG C of meltings, molten iron is obtained；
(3) La is added before casting ladle：0.01~0.4%, Ce：0.01~0.7%, pour into afterwards in casting ladle wrap it is interior pregnant
Educate, the incubation time is 10 ± 2 minutes, and the tapping temperature of molten iron is 1400~1450 DEG C；
(4) casting obtains double rare-earth-doped modification antiwear cast iron alloys.
To solve the problems, such as that the material wear abilities such as cylinder sleeve, piston ring are poor and other casting qualities, the present invention are double dilute using lanthanum-cerium
Soil doping cast iron technology of preparing means, acquisition can be applied to the field cylinder sleeve part blank technique skills such as production vehicle, ship, aviation
Art.
Double Rare Earth Lanthanum cerium mixtures of the present invention are added before casting ladle.The present invention double Rare Earth Lanthanum cerium mixtures be La30~
40wt% and Ce60~70wt%.
Compared with prior art, beneficial effects of the present invention are as follows：
Double rare-earth-doped modification antiwear cast iron alloys of the present invention, alloying element is replaced using the double luciums of lanthanum cerium,
Production cost is greatly reduced, while improves the hardness and wearability of cast iron；Rare earth element has stronger purification function, with having
Harmful element reacts, and generates forming core core, reduces cyrystal boundary segregation and is mingled with, improves the form, size and distribution of field trash,
The bond strength of crystal boundary is improved, so as to improve the intensity of cast iron, toughness and wearability.
When rare earth adding quantity 0.6%, hardness test, tension, wear test are carried out.Compared to Mr. Yu's board cylinder sleeve and single rare earth
Lanthanum mixes, and double RE alloyed modified cast iron wearabilities of rare earth will be got well.It is as shown in the table for specific targets：
Double rare-earth-doped modification antiwear cast iron alloy materials provided by the invention and preparation method, its main feature is that cost it is low,
Wearability is high, and suitable for friction members such as cylinder sleeve or piston ring such as manufacture automobile, ships, and technique is simple.
Brief description of the drawings
Fig. 1 is the graphite form of the rear-earth-doped compacted black composite coating of embodiment 4 pairs.
Fig. 2 is the pearlite piece interlamellar spacing of embodiment 4.
Fig. 3 is the XRD analysis collection of illustrative plates of embodiment 4.
Embodiment
The present invention is further illustrated with reference to embodiments, but the present invention is not limited only to these embodiments, not
On the premise of departing from present inventive concept, any improvement made is all fallen within protection scope of the present invention.
Embodiment 1：
A kind of double rare-earth-doped modification vermicular cast irons, C 3.1~3.2%, Si are made by following components in percentage by weight
~0.9%, Mn~0.6%, Cu：1.0~1.5%, P：0.2~0.4, B：0.02~0.04%, S~0.0005%, La：0.03
~0.04%, Ce：0.06~0.07%, remaining is Fe and inevitable impurity.
Preparation method, comprises the following steps：
(1) raw material is configured：By above-mentioned 45 steel of cast iron composition ratio-dependent raw material, the pig iron, ferrophosphorus, ferromanganese, ferro-boron, ferrosilicon,
The components such as copper；
(2) raw material melting：In smelting furnace, by the raw material of configuration in 1450 DEG C of meltings, molten iron is obtained；
(3) breed：The double luciums of lanthanum cerium are added before casting ladle, molten iron is poured into casting ladle afterwards wrap it is interior pregnant
Educate, the incubation time is 10 minutes or so, and the tapping temperature of molten iron is 1400 DEG C；
(4) casting obtains RE alloyed cast iron.
Embodiment 2：
A kind of double rare-earth-doped modification vermicular cast irons, C 3.1~3.2%, Si are made by following components in percentage by weight
~0.9%, Mn~0.6%, Cu：1.0~1.5%, P：0.2~0.4, B：0.02~0.04%, S~0.0005%, La：0.06
~0.08%, Ce：0.12~0.14%, remaining is Fe and inevitable impurity.
Preparation method, comprises the following steps：
(1) raw material is configured：By above-mentioned 45 steel of cast iron composition ratio-dependent raw material, the pig iron, ferrophosphorus, ferromanganese, ferro-boron, ferrosilicon,
The components such as copper；
(2) raw material melting：In smelting furnace, by the raw material of configuration in 1500 DEG C of meltings, molten iron is obtained；
(3) breed：The double luciums of lanthanum cerium are added before casting ladle, molten iron is poured into casting ladle afterwards wrap it is interior pregnant
Educate, the incubation time is 10 minutes or so, and the tapping temperature of molten iron is 1400 DEG C；
(4) casting obtains RE alloyed cast iron.
Embodiment 3：
A kind of double rare-earth-doped modification vermicular cast irons, C is made by following components in percentage by weight：3.1~3.2%, Si
~0.9%, Mn~0.6%, Cu：1.0~1.5%, P：0.2~0.4, B：0.02~0.04%, S~0.0005%, La：0.12
~0.16%, Ce：0.24~0.28%, remaining is Fe and inevitable impurity.
Preparation method, comprises the following steps：
(1) raw material is configured：By above-mentioned 45 steel of cast iron composition ratio-dependent raw material, the pig iron, ferrophosphorus, ferromanganese, ferro-boron, ferrosilicon,
The components such as copper；
(2) raw material melting：In smelting furnace, by the raw material of configuration in 1500 DEG C of meltings, molten iron is obtained；
(3) breed：The double luciums of lanthanum cerium are added before casting ladle, molten iron is poured into casting ladle afterwards wrap it is interior pregnant
Educate, the incubation time is 10 minutes or so, and the tapping temperature of molten iron is 1450 DEG C；
(4) casting obtains RE alloyed cast iron.
Embodiment 4：
A kind of double rear-earth-doped vermicular cast irons, C is made by following components in percentage by weight：3.1~3.2%, Si~
0.9%, Mn~0.6%, Cu：1.0~1.5%, P：0.2~0.4, B：0.02~0.04%, S~0.0005%, La：0.18~
0.24%, Ce：0.36~0.42%, remaining is Fe and inevitable impurity.
Preparation method, comprises the following steps：
(1) raw material is configured：By above-mentioned 45 steel of cast iron composition ratio-dependent raw material, the pig iron, ferrophosphorus, ferromanganese, ferro-boron, ferrosilicon,
The components such as copper；
(2) raw material melting：In smelting furnace, by the raw material of configuration in 1550 DEG C of meltings, molten iron is obtained；
(3) breed：The double luciums of lanthanum cerium are added before casting ladle, molten iron is poured into casting ladle afterwards wrap it is interior pregnant
Educate, the incubation time is 10 minutes or so, and the tapping temperature of molten iron is 1400 DEG C；
(4) casting obtains RE alloyed cast iron.
Embodiment 5：
A kind of double rare-earth-doped modification vermicular cast irons, C is made by following components in percentage by weight：3.1~3.2%, Si
~0.9%, Mn~0.6%, Cu：1.0~1.5%, P：0.2~0.4, B：0.02~0.04%, S~0.0005%, La：0.24
~0.32%, Ce：0.48~0.56%, remaining is Fe and inevitable impurity.
Preparation method, comprises the following steps：
(1) raw material is configured：By above-mentioned 45 steel of cast iron composition ratio-dependent raw material, the pig iron, ferrophosphorus, ferromanganese, ferro-boron, ferrosilicon,
The components such as copper；
(2) raw material melting：In smelting furnace, by the raw material of configuration in 1550 DEG C of meltings, molten iron is obtained；
(3) breed：The double luciums of lanthanum cerium are added before casting ladle, molten iron is poured into casting ladle afterwards wrap it is interior pregnant
Educate, the incubation time is 10 minutes or so, and the tapping temperature of molten iron is 1450 DEG C；
(4) casting obtains RE alloyed cast iron.
Embodiment 6：
A kind of double rare-earth-doped modification vermicular cast irons, C is made by following components in percentage by weight：3.1~3.2%, Si
~0.9%, Mn~0.6%, Cu：1.0~1.5%, P：0.2~0.4, B：0.02~0.04%, S~0.0005%, La：0.3
~0.4%, Ce：0.6~0.7%, remaining is Fe and inevitable impurity.
Preparation method, with embodiment 1
From above-described embodiment as can be seen that method provided by the invention can be used in preparing the cast iron of a variety of composition contents,
And raw material sources provided by the invention are extensive, and stable components, the demand of raw material in Cast Iron Production disclosure satisfy that, and relatively
In high alloy iron, cost greatly reduces, and application prospect is extensive.
Claims (2)
- A kind of 1. double rare-earth-doped modification antiwear cast iron alloys, it is characterized in that being C by percentage by weight：3.1~3.2%, Si： 0.9%th, Mn：0.6%th, Cu：1.0~1.5%, P：0.2~0.4%, B：0.02~0.04%, S：0.0005%th, La：0.18~ 0.24%th, Ce：0.36~0.42%, the Fe of surplus and inevitable impurity are made.
- 2. a kind of preparation method of double rare-earth-doped modification antiwear cast iron alloys, it is characterized in that：(1) using 45 steel, the pig iron, ferrophosphorus, ferromanganese, ferro-boron, ferrosilicon and copper as raw material, preparation weight percent content is C：3.1~ 3.2%th, Si：0.9%th, Mn：0.6%th, Cu：1.0~1.5%, P：0.2~0.4%, B：0.02~0.04%, S：0.0005% And the mixture of Fe；(2) in smelting furnace, by the raw material of configuration in 1550 DEG C of meltings, molten iron is obtained；(3) La is added before casting ladle：0.18~0.24%, Ce：0.36~0.42%, pour into afterwards in casting ladle wrap it is interior pregnant Educate, the incubation time is 10 minutes, and the tapping temperature of molten iron is 1400 DEG C；(4) casting obtains double rare-earth-doped modification antiwear cast iron alloys.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083540A (en) * | 1993-05-06 | 1994-03-09 | 东北大学 | Rare earth boron complex alloy wear-resisting cast iron |
| CN102220542A (en) * | 2011-05-31 | 2011-10-19 | 长春工业大学 | Industrial production method of chromium-free white cast iron with high wear resistance |
| CN103103454A (en) * | 2011-11-15 | 2013-05-15 | 上海施耐德日盛机械(集团)有限公司 | Screw alloy for double-screw air compressor and preparation method of screw alloy |
| CN105525192A (en) * | 2015-12-14 | 2016-04-27 | 浙江海洋学院 | Anti-corrosion stainless steel plate for boat anchor and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0922740B1 (en) * | 2009-02-12 | 2017-12-05 | Teksid Do Brasil Ltda | METHOD FOR OBTAINING A HIGH PERFORMANCE CAST IRON CONNECTION FOR COMBUSTION ENGINES AND FILLED IN GENERAL. |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083540A (en) * | 1993-05-06 | 1994-03-09 | 东北大学 | Rare earth boron complex alloy wear-resisting cast iron |
| CN102220542A (en) * | 2011-05-31 | 2011-10-19 | 长春工业大学 | Industrial production method of chromium-free white cast iron with high wear resistance |
| CN103103454A (en) * | 2011-11-15 | 2013-05-15 | 上海施耐德日盛机械(集团)有限公司 | Screw alloy for double-screw air compressor and preparation method of screw alloy |
| CN105525192A (en) * | 2015-12-14 | 2016-04-27 | 浙江海洋学院 | Anti-corrosion stainless steel plate for boat anchor and production method thereof |
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