CN107557654A - A kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment - Google Patents
A kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment Download PDFInfo
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- CN107557654A CN107557654A CN201710692158.3A CN201710692158A CN107557654A CN 107557654 A CN107557654 A CN 107557654A CN 201710692158 A CN201710692158 A CN 201710692158A CN 107557654 A CN107557654 A CN 107557654A
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Abstract
The present invention relates to a kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment, belong to high-abrasive material field.Boron is added in rich chromium cast iron, boron adding proportion is the 0.2 0.4% of rich chromium cast iron weight, rich chromium cast iron is melted into molten iron, ferro-boron use is rushed into bag method to be added, according to rich chromium cast iron water weight and composition in tundish, add nano SiC core-spun yarn and Metamorphism treatment is carried out to rich chromium cast iron water, nano SiC addition is the 0.03 0.08% of rich chromium cast iron water weight, then the austenitizing temperature of mixture is improved into 10 20 DEG C of progress complete austenitizings, and quenched in biological quenching oil, produce.The invention provides a kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment, technique is simple, and abrading-ball hardness, toughness, the wearability finally given increases substantially, and the effective rich chromium cast iron performance that improves reduces ore grinding synthesis use cost.
Description
Technical field
The present invention relates to high-abrasive material field, and in particular to a kind of boron-containing high-chromium cast-iron grinding ball system through nanometer Metamorphism treatment
Preparation Method.
Background technology
High-chromium white cast iron has production efficiency is high, hardness is evenly distributed, wearability is got well etc. as high-abrasive material of new generation
Feature, in China, the field such as Mine Electric Power, metallurgy, building materials is widely used.But its relatively low toughness and higher use cost
Users and founder author are annoying always.In today of Market competition, the technology upgrading to HI-chrome cast iron for grinding balls
As a problem that can not be ignored.
B can be improved the form of eutectic carbide and distribution in rich chromium cast iron, made continuously distributed carbon with thinning solidification structure
Compound becomes interrupted, isolated spherical distribution, meanwhile, B is strong quenching degree element, can improve the quenching degree of material, and B and Fe,
The adhesion of the metallic elements such as Cr is higher, and the hardness of boride is also higher compared with the hardness of carbide, so, B can improve high chromium casting
Intensity, hardness and the toughness of iron, effective improve wearability.However, with the increase of B content, it is complete in heat treatment process
The difficulty of austenitizing is also bigger, and excessive B content can make carbide volume fraction and continuity increase again, with thick
Alloy carbide occur, cause toughness to reduce.Above reason also limit applications of the B in rich chromium cast iron.
The content of the invention
In order to solve above mentioned problem existing for prior art, the invention provides a kind of boracic through nanometer Metamorphism treatment is high
Chromium cast-iron grinding ball preparation method, casting technology field are rebuild traditional industry using alloying and nanometer technology, particularly as being in height
B is added in chromium cast-iron grinding ball and after nano material Metamorphism treatment, reach the mesh for improving HI-chrome cast iron for grinding balls hardness and wear resistance
's.
The technical solution adopted in the present invention is：
A kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment, adds boron, boron adds in rich chromium cast iron
The 0.2-0.4% for adding ratio to be rich chromium cast iron weight, molten iron is melted into by rich chromium cast iron, and ferro-boron use is rushed into bag method is added
Add, according to rich chromium cast iron water weight and composition in tundish, addition nano SiC core-spun yarn carries out rotten place to rich chromium cast iron water
Reason, nano SiC addition are the 0.03-0.08% of rich chromium cast iron water weight, then improve the austenitizing temperature of mixture
10-20 DEG C of progress complete austenitizing, and quenched in biological quenching oil, produce.
Cr content >=10% in the rich chromium cast iron.
The particle diameter of the ferro-boron is 1-10mm.
The present invention appropriate B is added in rich chromium cast iron and after nano SiC is handled, using uniqueness Technology for Heating Processing,
HI-chrome cast iron for grinding balls wearability is set to improve 20-30% on the original basis.
Beneficial effects of the present invention are：
1. the present invention utilizes the heat treatment of uniqueness using appropriate B is added in rich chromium cast iron and after nano SiC is handled
Technique, HI-chrome cast iron for grinding balls wearability is set to improve 20-30% on the original basis, technique and simple to operate.
2. the HI-chrome cast iron for grinding balls produced, positive effect, hardness improve 2-4HRC, toughness improves 0.5-1J/cm2, it is resistance to
Mill property improves more than 20%.
Embodiment
Below in conjunction with specific example, to a kind of boron-containing high-chromium cast iron through nanometer Metamorphism treatment described in the present patent application
Abrading-ball preparation method is described and illustrated, in order to which the public is better understood from the technology contents of the present invention, rather than right
The limitation of the technology contents, under identical or approximate principle, the improvement to processing step progress, including reaction bar
Part, agents useful for same improve and replace, reach identical purpose, then all the present patent application technical scheme claimed it
It is interior.
Embodiment one
A kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment, adds boron, boron adds in rich chromium cast iron
Add 0.29% that ratio is rich chromium cast iron weight, when molten iron discharging, ferro-boron is put into tundish.Then, according to weight of molten iron
With composition, addition nano SiC core-spun yarn carries out Metamorphism treatment, this bag weight of molten iron 645kg, and nano SiC addition is cast for high chromium
The 0.05% of weight of molten iron, i.e. 0.32kg.Specific composition is as follows：
| C | Si | Mn | Cr | B | P | S |
| 2.67 | 0.63 | 0.62 | 10.38 | 0.29 | 0.023 | 0.021 |
Cr contents 10.38% in the rich chromium cast iron.
The particle diameter of the ferro-boron is 1-8mm.
Finally it is heat-treated, 935 DEG C of complete austenitizing temperature, and is quenched in quenching oil, is tempered and produces.
Former technique, this material high chromium casting ball hardness 61.5, the abrading-ball hardness finally given improve 2.5HRC, reach 64HRC.
Toughness improves 0.6J/cm2, in actual use, service life improves 30%, and integrated cost reduces 12%.
Embodiment two
A kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment, adds boron, boron adds in rich chromium cast iron
Add 0.31% that ratio is rich chromium cast iron weight, when molten iron discharging, ferro-boron is put into tundish.Then, according to weight of molten iron
With composition, addition nano SiC core-spun yarn carries out Metamorphism treatment, this bag weight of molten iron 655kg, and nano SiC addition is cast for high chromium
The 0.05% of weight of molten iron, i.e. 0.32kg.Specific composition is as follows：
| C | Si | Mn | Cr | B | P | S |
| 2.64 | 0.68 | 0.53 | 12.43 | 0.31 | 0.028 | 0.018 |
Cr contents 12.43% in the rich chromium cast iron.
The particle diameter of the ferro-boron is 1-8mm.
Finally it is heat-treated, 945 DEG C of complete austenitizing temperature, and is quenched in quenching oil, is tempered and produces.
Former technique, this material high chromium casting ball hardness 62, the abrading-ball hardness finally given improve 1.8HRC, reach 63.8HRC.
Toughness improves 0.55J/cm2, in actual use, service life improves 25%, and integrated cost reduces 11%.
Embodiment three
A kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment, adds boron, boron adds in rich chromium cast iron
Add 0.31% that ratio is rich chromium cast iron weight, when molten iron discharging, ferro-boron is put into tundish.Then, according to weight of molten iron
With composition, addition nano SiC core-spun yarn carries out Metamorphism treatment, this bag weight of molten iron 715kg, and nano SiC addition is cast for high chromium
The 0.05% of weight of molten iron, i.e. 0.35kg.Specific composition is as follows：
| C | Si | Mn | Cr | B | P | S |
| 2.58 | 0.72 | 0.54 | 15.27 | 0.31 | 0.032 | 0.025 |
Cr contents 15.27% in the rich chromium cast iron.
The particle diameter of the ferro-boron is 1-8mm.
Finally it is heat-treated, 965 DEG C of complete austenitizing temperature, and is quenched in quenching oil, is tempered and produces.
Former technique, this material high chromium casting ball hardness 62, the abrading-ball hardness finally given improve 2.5HRC, reach 64.5HRC.
Toughness improves 0.8J/cm2, in actual use, service life improves 30%, and integrated cost reduces 15%.
Example IV
A kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment, adds boron, boron adds in rich chromium cast iron
Add 0.32% that ratio is rich chromium cast iron weight, when molten iron discharging, ferro-boron is put into tundish.Then, according to weight of molten iron
With composition, addition nano SiC core-spun yarn carries out Metamorphism treatment, this bag weight of molten iron 1000kg, and nano SiC addition is cast for high chromium
The 0.05% of weight of molten iron, i.e. 0.5kg.Specific composition is as follows：
| C | Si | Mn | Cr | B | P | S |
| 2.58 | 0.78 | 0.62 | 18.33 | 0.32 | 0.047 | 0.035 |
Cr contents 18.33% in the rich chromium cast iron.
The particle diameter of the ferro-boron is 1-10mm.
Finally it is heat-treated, 1000 DEG C of complete austenitizing temperature, and is quenched in quenching oil, is tempered and produces.
Former technique, this material high chromium casting ball hardness 61, the abrading-ball hardness finally given improve 2.3HRC, reach 63.3HRC.
Toughness improves 0.7J/cm2, in actual use, service life improves 26%, and integrated cost reduces 18%.
The present invention is not limited to above-mentioned preferred forms, and anyone can show that other are various under the enlightenment of the present invention
The product of form, however, make any change in its shape or structure, it is every that there is skill identical or similar to the present application
Art scheme, is within the scope of the present invention.
Claims (3)
1. a kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment, it is characterised in that add in rich chromium cast iron
Add boron, boron adding proportion is the 0.2-0.4% of rich chromium cast iron weight, treats that cast iron melting is completed, and ferro-boron is carried out using bag method is rushed
Addition, rich chromium cast iron water is gone bad according to rich chromium cast iron water weight and composition, addition nano SiC core-spun yarn in tundish
Processing, nano SiC addition are the 0.03-0.08% of rich chromium cast iron water weight, then improve the austenitizing temperature of product
10-20 DEG C of progress complete austenitizing, and quenched in biological quenching oil, produce.
2. a kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment according to claim 1, its feature
It is, Cr content >=10% in the rich chromium cast iron.
3. a kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment according to claim 1, its feature
It is, the particle diameter of the ferro-boron is 1-10mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112359273A (en) * | 2020-10-15 | 2021-02-12 | 武汉科技大学 | High-hardness high-carbon medium-chromium wear-resistant cast iron and preparation method thereof |
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| CN102220541A (en) * | 2011-05-26 | 2011-10-19 | 山东开泰抛丸机械有限公司 | High chromium cast iron containing SiC powder, preparation method thereof and wear resistant casting |
| CN104862448A (en) * | 2015-05-29 | 2015-08-26 | 宁国市华丰耐磨材料有限公司 | Preparation method applying nano molten iron modificator to high-chrome cast ball |
| CN105821174A (en) * | 2016-03-28 | 2016-08-03 | 繁昌县天和机械有限公司 | Preparation method of nano-modified vanadium-nickel ductile cast iron |
| CN105821173A (en) * | 2016-03-28 | 2016-08-03 | 繁昌县天和机械有限公司 | Preparation method for nano modified grey cast iron with high tensile strength |
| CN106011600A (en) * | 2016-07-01 | 2016-10-12 | 宁国市开源电力耐磨材料有限公司 | Technology for cast iron smelting through medium-frequency induction furnace |
| CN106244902A (en) * | 2016-08-23 | 2016-12-21 | 宁国市开源电力耐磨材料有限公司 | A kind of energy-conservation smelting technology of Abrasion Resistant High Chromium Cast Iron |
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- 2017-08-14 CN CN201710692158.3A patent/CN107557654A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220541A (en) * | 2011-05-26 | 2011-10-19 | 山东开泰抛丸机械有限公司 | High chromium cast iron containing SiC powder, preparation method thereof and wear resistant casting |
| CN104862448A (en) * | 2015-05-29 | 2015-08-26 | 宁国市华丰耐磨材料有限公司 | Preparation method applying nano molten iron modificator to high-chrome cast ball |
| CN105821174A (en) * | 2016-03-28 | 2016-08-03 | 繁昌县天和机械有限公司 | Preparation method of nano-modified vanadium-nickel ductile cast iron |
| CN105821173A (en) * | 2016-03-28 | 2016-08-03 | 繁昌县天和机械有限公司 | Preparation method for nano modified grey cast iron with high tensile strength |
| CN106011600A (en) * | 2016-07-01 | 2016-10-12 | 宁国市开源电力耐磨材料有限公司 | Technology for cast iron smelting through medium-frequency induction furnace |
| CN106244902A (en) * | 2016-08-23 | 2016-12-21 | 宁国市开源电力耐磨材料有限公司 | A kind of energy-conservation smelting technology of Abrasion Resistant High Chromium Cast Iron |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112359273A (en) * | 2020-10-15 | 2021-02-12 | 武汉科技大学 | High-hardness high-carbon medium-chromium wear-resistant cast iron and preparation method thereof |
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Application publication date: 20180109 |