CN104451370A - Vanadium-containing hypereutectic high-chromium cast iron and preparation method thereof - Google Patents
Vanadium-containing hypereutectic high-chromium cast iron and preparation method thereof Download PDFInfo
- Publication number
- CN104451370A CN104451370A CN201410838993.XA CN201410838993A CN104451370A CN 104451370 A CN104451370 A CN 104451370A CN 201410838993 A CN201410838993 A CN 201410838993A CN 104451370 A CN104451370 A CN 104451370A
- Authority
- CN
- China
- Prior art keywords
- iron
- vanadium
- cast iron
- chromium cast
- chromium
- 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.)
- Granted
Links
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a vanadium-containing hypereutectic high-chromium cast iron, and belongs to the technical field of high-chromium cast iron; the vanadium-containing hypereutectic high-chromium cast iron is prepared by deoxidation and breeding with ladle bottom pouring process, wherein the chemical constituents by weight percent are as follows: 3.5% to 4.4% of carbon C; 0.1% to 1.2% of manganese Mn; 15.5% to 21.5% of chromium Cr; 0.5% to 1.5% of silicon Si; 5.5% to 7.5% of vanadium V; less than or equal to 0.06% of phosphor P; less than or equal to 0.06% of sulfur; the rest is iron. The cast iron is able to be used for manufacturing members of slurry pump transflux part, and the like, which endure large abrasion; the manufacturing method thereof is simple and economical; the quality of product is stable; and the market foreground is abroad.
Description
Technical field
The present invention relates to rich chromium cast iron technical field.
Background technology
Rich chromium cast iron is a class application important high-abrasive material widely, and it is widely used in all kinds of worn parts in the fields such as metallurgy, mine, water conservancy, electric power, chemical industry and various conveying containing in the flow passage part (impeller, sheath and backplate) of solid particulate fluid pump.A large amount of high rigidity M is there is in the tissue of rich chromium cast iron
7c
3type carbide, thus has excellent wear resistance, and simultaneously because eutectic carbides pattern is shaft-like distribution, therefore comparatively other white cast iron also makes moderate progress in toughness.Chromium in rich chromium cast iron effectively can not only improve material corrosion resistance in the slurry, and what exist in a large number contains chromium M simultaneously
7c
3type carbide effectively improves the wear resistance of material, improves the work-ing life of flow passage part.In rich chromium cast iron, the raising of increase on flow passage part erosive wear drag of carbide quantity has important impact, but, when carbide quantity is brought up to a certain degree, thick primary carbide will be there will be in rich chromium cast iron, cause the toughness of rich chromium cast iron sharply to decline, thus make hypereutectic high chromium cast iron lose use value.Therefore, be generally carbon equivalent for the rich chromium cast iron of this class flow passage part at present and be no more than the Hypoeutectic High Cr Cast Iron that eutectic point is the upper limit, as cast irons such as KMTBCr26 and KMTBCr15Mo3 in China's high-abrasive material national standard.
In hypereutectic high chromium cast iron due to exist crisp hard, thick carbide thus intensity and toughness lower, the casting flaw such as easily to crack, the application of hypereutectic high chromium cast iron on wear parts of these drawbacks limit.Should keep the high rigidity feature of hypereutectic material, improve its intensity and toughness again, best bet is exactly its primary carbide of refinement.So refined carbides, changing its distributional pattern, is the important means improving hypereutectic high chromium cast iron toughness.
Application number be 200710178680.6 Chinese patent disclose a kind of as cast condition high carbon and high chromium cast iron and preparation method thereof, wherein the chemical composition of high carbon and high chromium cast iron is (% by weight): C 4.5 ~ 5.5, Cr 22.5 ~ 30.8, V 3.0 ~ 5.0, Mn 0.7 ~ 1.2, Nb 0.2 ~ 0.5, Ti 0.5 ~ 1.0, Mg 0.08 ~ 0.20, Na 0.05 ~ 0.20, Re 0.05 ~ 0.20, Si < 1.0, surplus is iron and inevitable trace impurity, and chromium carbon ratio >=5.0 and≤5.6.The principal feature of this patent improves carbon content in rich chromium cast iron, increases primary carbide, thus improve its wear resistance.But due to the Ti containing 0.5 ~ 1.0 in this patent, and Ti element is very easy to oxidation, causes foundry goods easily to produce the defects such as slag inclusion.In addition, vanadium iron particle need be adopted when alloy molten solution is come out of the stove in the preparation method that this patent provides to breed and use magnesium-rare earth and sodium salt compound modification treatment, which increase manufacture difficulty, and the performance of material is wayward.
Patent WO2004/103608 describes a kind of method that evaporative pattern produces hypereutectic cast iron, can be used for the parts producing the equipment such as Pulp pump, swirler and crusher.The shortcoming of the method is: mould investment is large, is unsuitable for the production of the small quantities of Pulp pump parts of single-piece; The maximum of its nucleating agent that can add is restricted (be generally no more than 1%, maximum be no more than 2%); The granularity of nucleating agent is less, is generally no more than 100um, and the impurity phases such as the oxide compound on its surface are to more, and under this invention condition, these impurity all remain in foundry goods, have adverse influence to the toughness of material.
Patent WO4047760-A1 and EP147422-A1 discloses a kind of wear-resisting hypereutectic high chromium cast iron, Cr too high levels in this cast iron, although hardness is higher, but toughness is on the low side, lower teeming temperature (teeming temperature is no more than its liquidus line 100 degree) need be adopted, the primary carbide size of acquisition about 75 μm.Owing to need adopt lower teeming temperature, therefore, easily there is the defects such as cold shut, misrun and crackle during Foundry Production in the difficult forming when pouring into a mould thin-walled or Complex Parts.
Application number be 201210182532.2 Chinese patent disclose a kind of high-carbon height vanadium wear resisting steel, its Ingredient percent is: carbon (C) 2.0% ~ 2.6%, vanadium (V) 8.0% ~ 9.0%, chromium (Cr) 5.5% ~ 6.5%, molybdenum (Mo) 2.0% ~ 3.0%, nickel (Ni) 0.5% ~ 1.0%, niobium (Nb) 1.0% ~ 2.0%, silicon (Si) 0.4% ~ 1.0%, phosphorus (P) < 0.04%, sulphur (S) < 0.04%, surplus is iron (Fe).These steel are owing to adding the noble elements such as Mo, Ni and Nb, and thus cost is higher.
Publication number be 5803152 United States Patent (USP) " Microstructurally refined multiphase castings " describe a kind of method of refinement primary phase, the method is applicable to the alloy (aluminium/silicon of all eutectic phases, copper/silver, especially for white cast iron).This technique in molten metal, adds nucleating agent pouring cast part while.Its shortcoming is: the add-on of nucleating agent is higher, and the impurity such as the oxide compound on its surface generally all remain in foundry goods, has adverse influence to the toughness of material; In addition, the method teeming temperature is on the low side, and the mobility of aluminium alloy is bad, the little Complex Parts being applicable to production Wet Parts of slurry pump and so on.
The people such as R.J.Llewellyn have delivered the paper that one section of autograph is " Scouring erosion resistance of metallic materials used in slurry pump service ".The hypereutectic high chromium cast iron that a kind of conventional casting of this paper is produced, this cast iron has good corrosion-resistant flushing resistance, but this paper does not introduce the method for refinement primary carbide.
In sum, although prior art all has research to containing vanadium cast iron, hypereutectic cast iron and rich chromium cast iron, but also there is the many disadvantages such as cost is high, complex process, suitability are narrow, effect is undesirable, especially also lack a kind of high abrasion, high tenacity, the high-hardness that are applicable to manufacture flow passage part and worn parts.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, there is provided a kind of containing vanadium hypereutectic high chromium cast iron and manufacture method thereof, this hypereutectic high chromium cast iron has the feature of high abrasion, high tenacity, high rigidity, can be used in manufacturing Wet Parts of slurry pump etc. and be easily subject to high-wearing parts, its manufacture method simple economy, constant product quality.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of containing vanadium hypereutectic high chromium cast iron, and this cast iron is by deoxidation treatment and breed obtained through ladle bottom pouring process, and its chemical composition as expressed in weight percent is:
Carbon C 3.5 ~ 4.4%, manganese Mn 0.1 ~ 1.2%,
Chromium Cr 15.5 ~ 21.5%, silicon Si 0.5 ~ 1.5%,
Vanadium V 5.5 ~ 7.5%, phosphorus P≤0.06%,
Sulphur S≤0.06%, all the other are iron.
As preferably, above-mentionedly containing vanadium hypereutectic high chromium cast iron chemical composition as expressed in weight percent be:
Carbon C 3.99%, manganese Mn 0.81%,
Chromium Cr 20.51%, silicon Si 0.86%,
Vanadium V 6.1%, phosphorus P 0.028%,
Sulphur S 0.024%, all the other are iron.
The above-mentioned manufacture method containing vanadium hypereutectic high chromium cast iron, it has following steps:
(1) with steel scrap, conversion pig, high carbon ferro-chrome and high carbon ferromanganese for raw material, be iron liquid by raw materials melt at 1500 ~ 1600 DEG C of temperature;
(2) in iron liquid, add the aluminium powder for deoxidation, add-on is 0.08 ~ 0.12% of iron liquid weight;
(3) vanadium iron being preheated to 470 ~ 580 DEG C is added in iron liquid, at 1400 ~ 1450 DEG C of temperature, make vanadium iron all melt and be dispersed in iron liquid, then bonded hard ferrite magnet be promoted to 1500 ~ 1600 DEG C and come out of the stove;
(4) adopt ladle bottom pouring process to carry out inoculation to iron liquid, nucleating agent is the Ferrotitanium particle that the granularity accounting for iron liquid weight 0.2 ~ 0.5% is less than 10mm; After breeding complete and calm slagging-off, at 1360 ~ 1400 DEG C of temperature, iron liquid is poured into casting mold in sand mold; The cast iron finally obtained chemical composition as expressed in weight percent is:
Carbon C 3.5 ~ 4.4%, manganese Mn 0.1 ~ 1.2%,
Chromium Cr 15.5 ~ 21.5%, silicon Si 0.5 ~ 1.5%,
Vanadium V 5.5 ~ 7.5%, phosphorus P≤0.06%,
Sulphur S≤0.06%, all the other are iron.
As preferably, above-mentioned steps (1) is medium-frequency induction furnace to the heating installation in step (3).
The beneficial effect adopting technique scheme to produce is: present method creatively with the addition of vanadium in rich chromium cast iron, thus obtain a kind of hypereutectic high chromium cast iron containing vanadium, this cast iron has the feature of high abrasion, high tenacity, high rigidity, heat treatment step can be omitted after casting mold, can be used in manufacturing Wet Parts of slurry pump etc. and be easily subject to high-wearing parts, its manufacture method simple economy, constant product quality, has wide market outlook.
Accompanying drawing explanation
Fig. 1 is the metallograph of cast iron of the present invention in embodiment 3;
Fig. 2 is the metallograph of comparative alloy in embodiment 3.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Embodiment 1:
Containing a manufacture method for vanadium hypereutectic high chromium cast iron, it has following steps:
(1) 205kg high carbon ferro-chrome (FeC55C600II), 110kg conversion pig (L04), 127kg steel scrap are joined in 500kg medium-frequency induction furnace, heating they meltings is iron liquid;
(2) iron liquid is warming up to 1500 ~ 1600 DEG C, in iron liquid, adds 0.5kg aluminium powder;
(3) be add in iron liquid after the vanadium iron (FeV50-B) of 58kg is preheated to 470 ~ 580 DEG C by weight, at 1400 ~ 1450 DEG C of temperature, make vanadium iron all melt and be dispersed in iron liquid, then bonded hard ferrite magnet be promoted to 1500 ~ 1600 DEG C and come out of the stove;
(4) granularity putting into 2.0kg at the bag end is less than the Ferrotitanium particle of 10mm, and employing is poured method and carried out inoculation to iron liquid; After breeding complete and calm slagging-off, pour in Castings Produce with Furan Resin at the temperature of 1360 DEG C by iron liquid, produce the Wet Parts of slurry pump such as backplate and sheath and pour into a mould impact toughness sample with type, specimen size is 20 mm × 20mm × 110mm.
The cast iron chemical composition as expressed in weight percent that aforesaid method is produced and mechanical property see the following form 1:
Table 1.
Embodiment 2:
Containing a manufacture method for vanadium hypereutectic high chromium cast iron, it has following steps:
(1) 155kg high carbon ferro-chrome (FeC55C1000II), 90kg conversion pig (L04), 179kg steel scrap and 3kg high carbon ferromanganese (FeMn78C8.0) are joined in 500kg medium-frequency induction furnace, heating they meltings is iron liquid;
(2) iron liquid is warming up to 1500 ~ 1600 DEG C, in iron liquid, adds 0.5kg aluminium powder;
(3) be add in iron liquid after the vanadium iron (FeV50-B) of 73kg is preheated to 470 ~ 580 DEG C by weight, at 1400 ~ 1450 DEG C of temperature, make vanadium iron all melt and be dispersed in iron liquid, then bonded hard ferrite magnet be promoted to 1500 ~ 1600 DEG C and come out of the stove;
(4) granularity putting into 2.0kg at the bag end is less than the Ferrotitanium particle of 10mm, and employing is poured method and carried out inoculation to iron liquid; After breeding complete and calm slagging-off, pour in Castings Produce with Furan Resin at the temperature of 1400 DEG C by iron liquid, produce the Wet Parts of slurry pump such as backplate and sheath and pour into a mould impact toughness sample with type, specimen size is 20 mm × 20mm × 110mm.
The cast iron chemical composition as expressed in weight percent that aforesaid method is produced and mechanical property see the following form 2:
Table 2.
Embodiment 3:
Containing a manufacture method for vanadium hypereutectic high chromium cast iron, it has following steps:
(1) 200kg high carbon ferro-chrome (FeC55C600II), 188kg conversion pig (L04), 50kg steel scrap and 2kg high carbon ferromanganese (FeMn78C8.0) are joined in 500kg medium-frequency induction furnace, heating they meltings is iron liquid;
(2) iron liquid is warming up to 1500 ~ 1600 DEG C, in iron liquid, adds 0.5kg aluminium powder;
(3) be add in iron liquid after the vanadium iron (FeV50-B) of 60kg is preheated to 470 ~ 580 DEG C by weight, at 1400 ~ 1450 DEG C of temperature, make vanadium iron all melt and be dispersed in iron liquid, then bonded hard ferrite magnet be promoted to 1500 ~ 1600 DEG C and come out of the stove;
(4) granularity putting into 2.0kg at the bag end is less than the Ferrotitanium particle of 10mm, and employing is poured method and carried out inoculation to iron liquid; After breeding complete and calm slagging-off, at the temperature of 1390 DEG C, iron liquid is poured in Castings Produce with Furan Resin, produce the Wet Parts of slurry pump such as backplate and sheath, and with type cast impact toughness sample, specimen size is 20 mm × 20mm × 110mm.
For the sample in embodiment 3, the comparative alloy and this sample that do not contain vanadium are compared, wherein comparative alloy also adopts the teeming temperature identical with embodiment 3 and identical specimen size, the results are shown in following table 3:
Table 3.
In embodiment 3, this sees Fig. 1 containing the metallograph of vanadium cast iron, and the metallograph of comparative alloy sample is shown in Fig. 2.
By more visible, in embodiment 3, this obtains obvious refinement containing the primary carbide of vanadium hypereutectic high chromium cast iron, and there is higher hardness and impelling strength, therefore be more suitable for manufacturing Wet Parts of slurry pump etc. and be in use subject to high-wearing parts, the cast iron of embodiment 1 and embodiment 2 also has the characteristic similar with embodiment 3 sample.This cast iron manufacture method simple economy, constant product quality, can omit heat treatment step after casting mold, have broad application prospects.
Claims (4)
1. containing a vanadium hypereutectic high chromium cast iron, to it is characterized in that: breed obtained through ladle bottom pouring process by deoxidation treatment, its chemical composition as expressed in weight percent is:
Carbon C 3.5 ~ 4.4%, manganese Mn 0.1 ~ 1.2%,
Chromium Cr 15.5 ~ 21.5%, silicon Si 0.5 ~ 1.5%,
Vanadium V 5.5 ~ 7.5%, phosphorus P≤0.06%,
Sulphur S≤0.06%, all the other are iron.
2. according to claim 1 containing vanadium hypereutectic high chromium cast iron, it is characterized in that: its chemical composition as expressed in weight percent is:
Carbon C 3.99%, manganese Mn 0.81%,
Chromium Cr 20.51%, silicon Si 0.86%,
Vanadium V 6.1%, phosphorus P 0.028%,
Sulphur S 0.024%, all the other are iron.
3. contain the manufacture method of vanadium hypereutectic high chromium cast iron described in claim 1, it is characterized in that: there are following steps:
(1) with steel scrap, conversion pig, high carbon ferro-chrome and high carbon ferromanganese for raw material, be iron liquid by raw materials melt at 1500 ~ 1600 DEG C of temperature;
(2) in iron liquid, add the aluminium powder for deoxidation, add-on is 0.08 ~ 0.12% of iron liquid weight;
(3) vanadium iron being preheated to 470 ~ 580 DEG C is added in iron liquid, at 1400 ~ 1450 DEG C of temperature, make vanadium iron all melt and be dispersed in iron liquid, then bonded hard ferrite magnet be promoted to 1500 ~ 1600 DEG C and come out of the stove;
(4) adopt ladle bottom pouring process to carry out inoculation to iron liquid, nucleating agent is the Ferrotitanium particle that the granularity accounting for iron liquid weight 0.2 ~ 0.5% is less than 10mm; After breeding complete and calm slagging-off, at 1360 ~ 1400 DEG C of temperature, iron liquid is poured into casting mold in sand mold; The cast iron finally obtained chemical composition as expressed in weight percent is:
Carbon C 3.5 ~ 4.4%, manganese Mn 0.1 ~ 1.2%,
Chromium Cr 15.5 ~ 21.5%, silicon Si 0.5 ~ 1.5%,
Vanadium V 5.5 ~ 7.5%, phosphorus P≤0.06%,
Sulphur S≤0.06%, all the other are iron.
4. according to claim 3 containing vanadium hypereutectic high chromium cast iron manufacture method, it is characterized in that: the heating installation in described step (1) to described step (3) is medium-frequency induction furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410838993.XA CN104451370B (en) | 2014-12-30 | 2014-12-30 | Vanadium-containing hypereutectic high-chromium cast iron and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410838993.XA CN104451370B (en) | 2014-12-30 | 2014-12-30 | Vanadium-containing hypereutectic high-chromium cast iron and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104451370A true CN104451370A (en) | 2015-03-25 |
| CN104451370B CN104451370B (en) | 2017-02-22 |
Family
ID=52898110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410838993.XA Active CN104451370B (en) | 2014-12-30 | 2014-12-30 | Vanadium-containing hypereutectic high-chromium cast iron and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104451370B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107574360A (en) * | 2017-09-06 | 2018-01-12 | 马鞍山市万兴耐磨金属制造有限公司 | A kind of rich chromium cast iron high-strength alloy wear-resistant ball and its manufacture method |
| CN110079725A (en) * | 2019-05-21 | 2019-08-02 | 石家庄工业泵厂有限公司 | A kind of super-high wear-resistant hypereutectic high chromium cast iron material, preparation method and applications |
| CN115287527A (en) * | 2022-08-19 | 2022-11-04 | 沈阳盛世五寰科技有限公司 | High-performance hypereutectic high-chromium cast iron without rare earth alterant and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2886584A (en) * | 1983-05-30 | 1984-12-06 | Vickers Australia Ltd. | High chromium white iron, manufacture thereof and its application to abrasion resistant composites |
| JPS6227553A (en) * | 1985-07-30 | 1987-02-05 | Hitachi Ltd | High-carbon-high-chromium steel and its production |
| CN1038844A (en) * | 1989-04-17 | 1990-01-17 | 丰润县合金铸件厂 | HI-chrome cast iron for grinding balls |
| CN101851725A (en) * | 2010-04-30 | 2010-10-06 | 燕山大学 | Alloy for improving shapes of carbides in nickel-hardened indefinite chilled cast iron and manufacturing method |
| CN101892417A (en) * | 2010-06-30 | 2010-11-24 | 石家庄铁道大学 | As-cast hypereutectic high chromium cast iron and preparation method thereof |
-
2014
- 2014-12-30 CN CN201410838993.XA patent/CN104451370B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2886584A (en) * | 1983-05-30 | 1984-12-06 | Vickers Australia Ltd. | High chromium white iron, manufacture thereof and its application to abrasion resistant composites |
| JPS6227553A (en) * | 1985-07-30 | 1987-02-05 | Hitachi Ltd | High-carbon-high-chromium steel and its production |
| CN1038844A (en) * | 1989-04-17 | 1990-01-17 | 丰润县合金铸件厂 | HI-chrome cast iron for grinding balls |
| CN101851725A (en) * | 2010-04-30 | 2010-10-06 | 燕山大学 | Alloy for improving shapes of carbides in nickel-hardened indefinite chilled cast iron and manufacturing method |
| CN101892417A (en) * | 2010-06-30 | 2010-11-24 | 石家庄铁道大学 | As-cast hypereutectic high chromium cast iron and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107574360A (en) * | 2017-09-06 | 2018-01-12 | 马鞍山市万兴耐磨金属制造有限公司 | A kind of rich chromium cast iron high-strength alloy wear-resistant ball and its manufacture method |
| CN110079725A (en) * | 2019-05-21 | 2019-08-02 | 石家庄工业泵厂有限公司 | A kind of super-high wear-resistant hypereutectic high chromium cast iron material, preparation method and applications |
| CN115287527A (en) * | 2022-08-19 | 2022-11-04 | 沈阳盛世五寰科技有限公司 | High-performance hypereutectic high-chromium cast iron without rare earth alterant and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104451370B (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100453674C (en) | Low cost, high-wearability hypereutectic high chromium cast iron and its production method | |
| CN103436773B (en) | Preparation method of wear-resistant high-chromium cast iron | |
| CN103014550B (en) | High chromium multielement alloy wear resisting ball and manufacturing method thereof | |
| CN101302597B (en) | Hypereutectic high-chromium white cast iron preparation method | |
| CN101942619B (en) | Glass mould material of alloy cast iron and preparation method thereof | |
| CN103526125B (en) | A kind of semisteel roll and manufacture method thereof | |
| CN103757516A (en) | Wear-resisting white cast iron and preparation method thereof | |
| CN101892417A (en) | As-cast hypereutectic high chromium cast iron and preparation method thereof | |
| CN102851574B (en) | Heatproof alloy vermicular cast iron and method for preparing same | |
| CN102925783A (en) | Method for preparing hypereutectic high chromium white cast iron | |
| CN110029266A (en) | A kind of cast iron silicon-zirconium-manganese-chromium inovulant and preparation method thereof | |
| CN103789600B (en) | Hypereutectic high chromium cast iron preparation method | |
| CN104532130B (en) | A kind of anti-corrosion liner plate of wet ball mill high-strength tenacity and preparation method | |
| CN102690987A (en) | Microalloyed high-strength synthetic gray cast iron and casting method thereof | |
| CN103060662B (en) | A kind of preparation technology of cast alloy iron abrading-ball | |
| CN102071352A (en) | Vanadium-titanium vermicular cast iron brake drum and preparation method thereof | |
| CN104762548A (en) | Titanium/nitrogen-codoped wear-resistant corrosion-resistant high-chromium cast iron and preparation method thereof | |
| CN109182890A (en) | A kind of gray cast iron and its smelting process | |
| CN105364029A (en) | Thick-wall steel casting solidification structure refining and purifying method | |
| CN100560766C (en) | A kind of melt treating method that is used for the high-vanadium high-speed steel roller material of all kinds of rolling mills | |
| CN104451370B (en) | Vanadium-containing hypereutectic high-chromium cast iron and preparation method thereof | |
| CN103882341B (en) | A kind of antiwear heat resisting alloy material and preparation method thereof | |
| CN106609334B (en) | A kind of superelevation chrome cast iron and preparation method thereof | |
| CN109811108A (en) | A kind of inovulant and preparation method thereof containing light rare earth metal | |
| CN103350184A (en) | Metal mold casting chromium white cast iron grinding ball used inoculation coating and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230809 Address after: 122300 Dawujiazi Village, Dachengzi Town, Harqin Zuoyi Mongol Autonomous County, Chaoyang City, Liaoning Province Patentee after: LIAONING GIAHAR INVESTMENT CASTINGS Co.,Ltd. Address before: 050043 No. 17, North Second Ring Road, Hebei, Shijiazhuang Patentee before: SHIJIAZHUANG TIEDAO University |