CN105695855A - Novel casting method for high-chromium cast iron containing CZr powder - Google Patents
Novel casting method for high-chromium cast iron containing CZr powder Download PDFInfo
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- CN105695855A CN105695855A CN201610193044.XA CN201610193044A CN105695855A CN 105695855 A CN105695855 A CN 105695855A CN 201610193044 A CN201610193044 A CN 201610193044A CN 105695855 A CN105695855 A CN 105695855A
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- czr
- cast iron
- chromium cast
- powder body
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
Abstract
The invention discloses a novel casting method for high-chromium cast iron containing CZr powder. The novel casting method comprises the steps of mixing the CZr powder with scrap iron, placing the mixture into a casting ladle, smelting and stirring ferromolybdenum, ferrochromium, silicon iron, ferronickel and ferrovanadium, carrying out deoxygenation and slagging-off treatment after the raw materials are completely molten, pouring the treated refined molten metal into the casting ladle in batches, stirring the CZr powder and the refined molten metal for being fully mixed, then carrying out casting molding and finally obtaining final products after the high-chromium cast iron containing the CZr powder undergoes heat treatment. According to the method, the cast high-chromium cast iron has the advantages of being resistant to high temperature, friction and abrasion, and the phenomena that the high-chromium cast iron is cracked and the surface of the high-chromium cast iron is peeled off layer by layer in the use process hardly occur. The method is scientific, effective and suitable for being widely popularized in industry.
Description
Technical field
The present invention relates to cast iron materials field, be specifically related to a kind of rich chromium cast iron novel casting method containing CZr powder body。
Background technology
Rich chromium cast iron is a kind of function admirable and is subject to the anti-friction material of attention especially, there is the wearability more much higher than steel alloy, with the toughness more much higher than general white cast-iron, intensity, it also has good high temperature resistance and corrosion resistance concurrently simultaneously, in addition produce convenient, moderate cost, be described as one of the most excellent contemporary abrasive wear resistant weld deposit material。For satisfied different working condition requirements, except adjusting phosphorus content, also it is aided with other alloying element, such as nickel, tungsten, molybdenum etc., forms Multiple alloying high-chromium cast iron and require higher shot-blasting machine upper-part as to wearability, usually all adopt high chromium cast iron material to be processed into。
But, there is following disadvantage in use in the rich chromium cast iron of prior art manufacture: when it bears high temperature friction, long work can make rich chromium cast iron easily impaired, easily produce cracking, easily there is the phenomenon that surface layer peels off in foundry goods, thus causing foundry goods wear out failure, therefore finding a kind of novel rich chromium cast iron casting method and being necessary at the easy wear problem of high temperature friction condition to solving rich chromium cast iron。
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of rich chromium cast iron novel casting method containing CZr powder body so that the rich chromium cast iron cast out has the feature of opposing high temperature friction and wear。
For realizing object above, the present invention is achieved by the following technical programs: a kind of rich chromium cast iron novel casting method containing CZr powder body, comprises the following steps:
(1) weigh CZr powder body first by weight percentage, be positioned in casting ladle；
(2) then weighing molybdenum-iron, ferrochrome, ferrosilicon, ferronickel, vanadium iron by weight percentage, put into medium-frequency induction furnace and carry out melting stirring, smelting temperature is 1480-1550 DEG C；
(3) after metal charge all melts, add ferromanganese and carry out deoxidation treatment, then carry out process 2-3 time of skimming, obtain refined metals liquid；
(4) refined metals liquid is poured in casting ladle in batches, make CZr powder body and refined metals liquid be sufficiently mixed, obtain the rich chromium cast iron solution containing CZr powder body；
(5) treat that the rich chromium cast iron solution temperature containing CZr powder body is reduced to 1400-1500 DEG C and pours into a mould, after solution cooled and solidified, obtain the rich chromium cast iron containing CZr powder body；
(6) finally the rich chromium cast iron containing CZr powder body is performed twice at heat treatment, obtain final products。
Preferably, rich chromium cast iron containing CZr powder body as described in claim 1, it is characterised in that described rich chromium cast iron is made up of following percentage by weight: C:2.6-3.8%, Cr:14-22%, Si:0.4-0.8%, Mo:0.5-1.4%, Mn:0.8-1.0%, Ni:0.1-0.4%, V:0.02-0.04%, S:0.015-0.028%, P:0.020-0.030%。
Preferably, described CZr powder body particle mean size is 20-40 nanometer, and described CZr powder body weight accounts for the 5-7% of described raw material ferrum gross weight。
Preferably, in described step (4), refined metals liquid is poured at twice, and first time pours the refined metals liquid stirring 15-20min of half in casting ladle, then pours second half refined metals liquid stirring 20-30min again into。
Preferably, the described pouring temperature in step (5) is 1400-1450 DEG C, and the speed of cast is 5-8L/min。
Preferably, in described step (6), twice heat treatment is blowing out after described rich chromium cast iron being warming up to first time 950 DEG C and being incubated 3h, is cooled to 390-400 DEG C and opens fire door, continues cool to 300 DEG C of air coolings of coming out of the stove；Blowing out after described rich chromium cast iron being warming up to 800 DEG C for the second time and being incubated 5h, is cooled to 300-350 DEG C of water-cooled of coming out of the stove。
The method have the benefit that
The present invention adds the forming core core that CZr powder body can solidify as rich chromium cast iron molten metal matrix and carbide, the growth morphology of carbide can be changed while suppressing the growing up of crystal, control the direction of growth of carbide, hardness and the wearability of rich chromium cast iron can be improved, the effect of opposing high temperature friction and wear can be played simultaneously。The inventive method refined metals liquid and CZr powder body adopt batch mixed, it is possible to when avoiding mixing, rich chromium cast iron cast-internal producing shrinkage cavity, pore, the casting flaw such as being mingled with, thus improving the compactness of cast-internal so that formed rich chromium cast iron is not easily susceptible to cracking。Heat treatment method in the present invention, adopts the mode of first air cooling water-cooled again, it is possible to improve the hardness of rich chromium cast iron, makes foundry goods be not easy the phenomenon that surface layer peels off occur in high temperature friction works。The inventive method scientific and effective, is adapted at industrial large-scale promotion。
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with embodiments of the invention, the technical scheme in the embodiment of the present invention is clearly and completely described。Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention。
Embodiment 1:
A kind of rich chromium cast iron novel casting method containing CZr powder body, comprises the following steps:
(1) first weigh particle mean size and be 20-40 nanometer, account for the CZr powder body of raw material ferrum gross weight 5%, be positioned in casting ladle；
(2) then weighing molybdenum-iron, ferrochrome, ferrosilicon, ferronickel, vanadium iron by weight percentage, put into medium-frequency induction furnace and carry out melting stirring, smelting temperature is 1480 DEG C；
(3) after metal charge all melts, add ferromanganese and carry out deoxidation treatment, then carry out process 2 times of skimming, obtain refined metals liquid；
(4) pour in casting ladle after refined metals liquid being stood, refined metals liquid is poured at twice, first time pours the refined metals liquid stirring 15min of half in casting ladle, then second half refined metals liquid stirring 20min is poured again into, make CZr powder body and refined metals liquid be sufficiently mixed, obtain the rich chromium cast iron solution containing CZr powder body；
(5) treating that the rich chromium cast iron solution temperature containing CZr powder body is reduced to 1400 DEG C and pours into a mould, the speed of cast is 5L/min, obtains the rich chromium cast iron containing CZr powder body after solution cooled and solidified；
(6) finally the rich chromium cast iron containing CZr powder body being carried out heat treatment, heat treatment number of times is twice, blowing out after rich chromium cast iron being warming up to 950 DEG C for the first time and being incubated 3h, is cooled to 390 DEG C and opens fire door, continues cool to 300 DEG C of air coolings of coming out of the stove；Blowing out after for the second time described rich chromium cast iron being warming up to 800 DEG C and being incubated 5h, being cooled to 300 DEG C of water-cooleds of coming out of the stove, finally give the rich chromium cast iron product containing CZr powder body, its composition by weight percent is: C:2.6-3.8%, Cr:14-22%, Si:0.4-0.8%, Mo:0.5-1.4%, Mn:0.8-1.0%, Ni:0.1-0.4%, V:0.02-0.04%, S:0.015-0.028%, P:0.020-0.030%。
Embodiment 2:
A kind of rich chromium cast iron novel casting method containing CZr powder body, comprises the following steps:
(1) first weigh particle mean size and be 20-40 nanometer, account for the CZr powder body of raw material ferrum gross weight 6%, be positioned in casting ladle；
(2) then weighing molybdenum-iron, ferrochrome, ferrosilicon, ferronickel, vanadium iron by weight percentage, put into medium-frequency induction furnace and carry out melting stirring, smelting temperature is 1500 DEG C；
(3) after metal charge all melts, add ferromanganese and carry out deoxidation treatment, then carry out process 3 times of skimming, obtain refined metals liquid；
(4) pour in casting ladle after refined metals liquid being stood, refined metals liquid is poured at twice, first time pours the refined metals liquid stirring 20min of half in casting ladle, then second half refined metals liquid stirring 30min is poured again into, make CZr powder body and refined metals liquid be sufficiently mixed, obtain the rich chromium cast iron solution containing CZr powder body；
(5) treating that the rich chromium cast iron solution temperature containing CZr powder body is reduced to 1420 DEG C and pours into a mould, the speed of cast is 6L/min, obtains the rich chromium cast iron containing CZr powder body after solution cooled and solidified；
(6) finally the rich chromium cast iron containing CZr powder body being carried out heat treatment, heat treatment number of times is twice, blowing out after rich chromium cast iron being warming up to 950 DEG C for the first time and being incubated 3h, is cooled to 400 DEG C and opens fire door, continues cool to 300 DEG C of air coolings of coming out of the stove；Blowing out after for the second time described rich chromium cast iron being warming up to 800 DEG C and being incubated 5h, being cooled to 350 DEG C of water-cooleds of coming out of the stove, finally give the rich chromium cast iron product containing CZr powder body, its composition by weight percent is: C:2.6-3.8%, Cr:14-22%, Si:0.4-0.8%, Mo:0.5-1.4%, Mn:0.8-1.0%, Ni:0.1-0.4%, V:0.02-0.04%, S:0.015-0.028%, P:0.020-0.030%。
Embodiment 3:
A kind of rich chromium cast iron novel casting method containing CZr powder body, comprises the following steps:
(1) first weigh particle mean size and be 20-40 nanometer, account for the CZr powder body of raw material ferrum gross weight 7%, be positioned in casting ladle；
(2) then weighing molybdenum-iron, ferrochrome, ferrosilicon, ferronickel, vanadium iron by weight percentage, put into medium-frequency induction furnace and carry out melting stirring, smelting temperature is 1500 DEG C；
(3) after metal charge all melts, add ferromanganese and carry out deoxidation treatment, then carry out process 2-3 time of skimming, obtain refined metals liquid；
(4) pour in casting ladle after refined metals liquid being stood, refined metals liquid is poured at twice, first time pours the refined metals liquid stirring 20min of half in casting ladle, then second half refined metals liquid stirring 20min is poured again into, make CZr powder body and refined metals liquid be sufficiently mixed, obtain the rich chromium cast iron solution containing CZr powder body；
(5) treating that the rich chromium cast iron solution temperature containing CZr powder body is reduced to 1410 DEG C and pours into a mould, the speed of cast is 6L/min, obtains the rich chromium cast iron containing CZr powder body after solution cooled and solidified；
(6) finally the rich chromium cast iron containing CZr powder body being carried out heat treatment, heat treatment number of times is twice, blowing out after rich chromium cast iron being warming up to 950 DEG C for the first time and being incubated 3h, is cooled to 395 DEG C and opens fire door, continues cool to 300 DEG C of air coolings of coming out of the stove；Blowing out after for the second time described rich chromium cast iron being warming up to 800 DEG C and being incubated 5h, being cooled to 320 DEG C of water-cooleds of coming out of the stove, finally give the rich chromium cast iron product containing CZr powder body, its composition by weight percent is: C:2.6-3.8%, Cr:14-22%, Si:0.4-0.8%, Mo:0.5-1.4%, Mn:0.8-1.0%, Ni:0.1-0.4%, V:0.02-0.04%, S:0.015-0.028%, P:0.020-0.030%。
Embodiment 4:
A kind of rich chromium cast iron novel casting method containing CZr powder body, comprises the following steps:
(1) first weigh particle mean size and be 20-40 nanometer, account for the CZr powder body of raw material ferrum gross weight 7%, be positioned in casting ladle；
(2) then weighing molybdenum-iron, ferrochrome, ferrosilicon, ferronickel, vanadium iron by weight percentage, put into medium-frequency induction furnace and carry out melting stirring, smelting temperature is 1550 DEG C；
(3) after metal charge all melts, add ferromanganese and carry out deoxidation treatment, then carry out process 2-3 time of skimming, obtain refined metals liquid；
(4) pour in casting ladle after refined metals liquid being stood, refined metals liquid is poured at twice, first time pours the refined metals liquid stirring 20min of half in casting ladle, then second half refined metals liquid stirring 30min is poured again into, make CZr powder body and refined metals liquid be sufficiently mixed, obtain the rich chromium cast iron solution containing CZr powder body；
(5) treating that the rich chromium cast iron solution temperature containing CZr powder body is reduced to 1450 DEG C and pours into a mould, the speed of cast is 8L/min, obtains the rich chromium cast iron containing CZr powder body after solution cooled and solidified；
(6) finally the rich chromium cast iron containing CZr powder body being carried out heat treatment, heat treatment number of times is twice, blowing out after rich chromium cast iron being warming up to 950 DEG C for the first time and being incubated 3h, is cooled to 400 DEG C and opens fire door, continues cool to 300 DEG C of air coolings of coming out of the stove；Blowing out after for the second time described rich chromium cast iron being warming up to 800 DEG C and being incubated 5h, being cooled to 350 DEG C of water-cooleds of coming out of the stove, finally give the rich chromium cast iron product containing CZr powder body, its composition by weight percent is: C:2.6-3.8%, Cr:14-22%, Si:0.4-0.8%, Mo:0.5-1.4%, Mn:0.8-1.0%, Ni:0.1-0.4%, V:0.02-0.04%, S:0.015-0.028%, P:0.020-0.030%。
Embodiment 5:
A kind of rich chromium cast iron novel casting method containing CZr powder body, comprises the following steps:
((1) first weighs particle mean size and is 20-40 nanometer, accounts for the CZr powder body of raw material ferrum gross weight 7%, is positioned in casting ladle；
(2) then weighing molybdenum-iron, ferrochrome, ferrosilicon, ferronickel, vanadium iron by weight percentage, put into medium-frequency induction furnace and carry out melting stirring, smelting temperature is 1520 DEG C；
(3) after metal charge all melts, add ferromanganese and carry out deoxidation treatment, then carry out process 2-3 time of skimming, obtain refined metals liquid；
(4) pour in casting ladle after refined metals liquid being stood, refined metals liquid is poured at twice, first time pours the refined metals liquid stirring 15-20min of half in casting ladle, then second half refined metals liquid stirring 20-30min is poured again into, make CZr powder body and refined metals liquid be sufficiently mixed, obtain the rich chromium cast iron solution containing CZr powder body；
(5) treating that the rich chromium cast iron solution temperature containing CZr powder body is reduced to 1420 DEG C and pours into a mould, the speed of cast is 8L/min, obtains the rich chromium cast iron containing CZr powder body after solution cooled and solidified；
(6) finally the rich chromium cast iron containing CZr powder body being carried out heat treatment, heat treatment number of times is twice, blowing out after rich chromium cast iron being warming up to 950 DEG C for the first time and being incubated 3h, is cooled to 400 DEG C and opens fire door, continues cool to 300 DEG C of air coolings of coming out of the stove；Blowing out after for the second time described rich chromium cast iron being warming up to 800 DEG C and being incubated 5h, being cooled to 330 DEG C of water-cooleds of coming out of the stove, finally give the rich chromium cast iron product containing CZr powder body, its composition by weight percent is: C:2.6-3.8%, Cr:14-22%, Si:0.4-0.8%, Mo:0.5-1.4%, Mn:0.8-1.0%, Ni:0.1-0.4%, V:0.02-0.04%, S:0.015-0.028%, P:0.020-0.030%。
Embodiment 6:
A kind of rich chromium cast iron novel casting method containing CZr powder body, comprises the following steps:
(1) first weigh particle mean size and be 20-40 nanometer, account for the CZr powder body of raw material ferrum gross weight 7%, be positioned in casting ladle；
(2) then weighing molybdenum-iron, ferrochrome, ferrosilicon, ferronickel, vanadium iron by weight percentage, put into medium-frequency induction furnace and carry out melting stirring, smelting temperature is 1550 DEG C；
(3) after metal charge all melts, add ferromanganese and carry out deoxidation treatment, then carry out process 2 times of skimming, obtain refined metals liquid；
(4) pour in casting ladle after refined metals liquid being stood, refined metals liquid is poured at twice, first time pours the refined metals liquid stirring 15min of half in casting ladle, then second half refined metals liquid stirring 20min is poured again into, make CZr powder body and refined metals liquid be sufficiently mixed, obtain the rich chromium cast iron solution containing CZr powder body；
(5) treating that the rich chromium cast iron solution temperature containing CZr powder body is reduced to 1450 DEG C and pours into a mould, the speed of cast is 5L/min, obtains the rich chromium cast iron containing CZr powder body after solution cooled and solidified；
(6) finally the rich chromium cast iron containing CZr powder body being carried out heat treatment, heat treatment number of times is twice, blowing out after rich chromium cast iron being warming up to 950 DEG C for the first time and being incubated 3h, is cooled to 390 DEG C and opens fire door, continues cool to 300 DEG C of air coolings of coming out of the stove；Blowing out after for the second time described rich chromium cast iron being warming up to 800 DEG C and being incubated 5h, being cooled to 350 DEG C of water-cooleds of coming out of the stove, finally give the rich chromium cast iron product containing CZr powder body, its composition by weight percent is: C:2.6-3.8%, Cr:14-22%, Si:0.4-0.8%, Mo:0.5-1.4%, Mn:0.8-1.0%, Ni:0.1-0.4%, V:0.02-0.04%, S:0.015-0.028%, P:0.020-0.030%。
Above example only in order to technical scheme to be described, is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme。
Claims (6)
1. the rich chromium cast iron novel casting method containing CZr powder body, it is characterised in that comprise the following steps:
(1) weigh CZr powder body first by weight percentage, be positioned in casting ladle；
(2) then weighing molybdenum-iron, ferrochrome, ferrosilicon, ferronickel, vanadium iron by weight percentage, put into medium-frequency induction furnace and carry out melting stirring, smelting temperature is 1480-1550 DEG C；
(3) after metal charge all melts, add ferromanganese and carry out deoxidation treatment, then carry out process 2-3 time of skimming, obtain refined metals liquid；
(4) refined metals liquid is poured in casting ladle in batches, make CZr powder body and refined metals liquid be sufficiently mixed, obtain the rich chromium cast iron solution containing CZr powder body；
(5) treat that the rich chromium cast iron solution temperature containing CZr powder body is reduced to 1400-1500 DEG C and pours into a mould, after solution cooled and solidified, obtain the rich chromium cast iron containing CZr powder body；
(6) finally the rich chromium cast iron containing CZr powder body is performed twice at heat treatment, obtain final products。
2. the rich chromium cast iron containing CZr powder body as described in claim 1, it is characterized in that, described rich chromium cast iron is made up of following percentage by weight: C:2.6-3.8%, Cr:14-22%, Si:0.4-0.8%, Mo:0.5-1.4%, Mn:0.8-1.0%, Ni:0.1-0.4%, V:0.02-0.04%, S:0.015-0.028%, P:0.020-0.030%。
3. the rich chromium cast iron containing CZr powder body as described in claim 2, it is characterised in that described CZr powder body particle mean size is 20-40 nanometer, and described CZr powder body weight accounts for the 5-7% of described raw material ferrum gross weight。
4. the rich chromium cast iron novel casting method containing CZr powder body as claimed in claim 1, it is characterized in that, in described step (4), refined metals liquid is poured at twice, first time pours the refined metals liquid stirring 15-20min of half in casting ladle, then pours second half refined metals liquid stirring 20-30min again into。
5. the rich chromium cast iron novel casting method containing CZr powder body as claimed in claim 1, it is characterised in that the described pouring temperature in step (5) is 1400-1450 DEG C, and the speed of cast is 5-8L/min。
6. the rich chromium cast iron novel casting method containing CZr powder body as claimed in claim 1, it is characterized in that, in described step (6), twice heat treatment is blowing out after described rich chromium cast iron being warming up to first time 950 DEG C and being incubated 3h, it is cooled to 390-400 DEG C and opens fire door, continue cool to 300 DEG C of air coolings of coming out of the stove；Blowing out after described rich chromium cast iron being warming up to 800 DEG C for the second time and being incubated 5h, is cooled to 300-350 DEG C of water-cooled of coming out of the stove。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107419163A (en) * | 2017-07-04 | 2017-12-01 | 镇江蓝舶科技股份有限公司 | A kind of ramming head alloy cast iron material |
| CN115261544A (en) * | 2022-08-19 | 2022-11-01 | 辽宁五寰特种材料与智能装备产业技术研究院有限公司 | Preparation method of high-chromium cast iron wear-resistant material containing multi-element metal phase |
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| CN105112765A (en) * | 2015-08-10 | 2015-12-02 | 霍邱县忠振耐磨材料有限公司 | High impact high chromium cast iron plate hammer and preparation method thereof |
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- 2016-03-29 CN CN201610193044.XA patent/CN105695855A/en active Pending
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| CN105112765A (en) * | 2015-08-10 | 2015-12-02 | 霍邱县忠振耐磨材料有限公司 | High impact high chromium cast iron plate hammer and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419163A (en) * | 2017-07-04 | 2017-12-01 | 镇江蓝舶科技股份有限公司 | A kind of ramming head alloy cast iron material |
| CN115261544A (en) * | 2022-08-19 | 2022-11-01 | 辽宁五寰特种材料与智能装备产业技术研究院有限公司 | Preparation method of high-chromium cast iron wear-resistant material containing multi-element metal phase |
| CN115261544B (en) * | 2022-08-19 | 2024-02-23 | 辽宁五寰特种材料与智能装备产业技术研究院有限公司 | Preparation method of high-chromium cast iron wear-resistant material containing multi-metal phase |
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Application publication date: 20160622 |