CN109706380A - A kind of preparation method of CADI abrading-ball - Google Patents
A kind of preparation method of CADI abrading-ball Download PDFInfo
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- CN109706380A CN109706380A CN201910009575.2A CN201910009575A CN109706380A CN 109706380 A CN109706380 A CN 109706380A CN 201910009575 A CN201910009575 A CN 201910009575A CN 109706380 A CN109706380 A CN 109706380A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a kind of preparation methods of CADI abrading-ball, including mix raw material and auxiliary material by formula ratio, are added in middle frequency furnace and are smelted；Reach 1480-1550 DEG C to the metal liquid temperature in electric furnace, metal liquid is come out of the stove and is imported in mold, carries out dam-type spheroidising packet；It carries out pouring the processing of method spheroidization and inoculation again, is transferred to casting ladle progress sample and is poured to obtain casting sample；Casting sample obtained is subjected to isothermal salt made from earth containing a comparatively high percentage of sodium chloride salt bath quenching processing, austempering medium is the compound of 50%KNO3+40%NaNO2+10%NaNO3；By the casting sample roll forming by the processing of S4 salt bath, it is rolled into the ball of required size.Through the above scheme, CADI abrading-ball high rigidity obtained, high tenacity have Work Hardening Characteristic, and wear away lower, not volatile circle, long service life.
Description
Technical field
The present invention relates to wear-resistant material, in particular to a kind of preparation method of CADI abrading-ball.
Background technique
In wear-resistant material, abrading-ball and liner plate account for the eighty per cant of its gross mass, and abrading-ball accounts for therein eighty per cant, therefore
Abrading-ball is highly important grinding main body, particularly in the industrial circles such as mine, metallurgy, thermal power generation, the mill of wear-resistant material
Damage, ability consumption occupy sizable ratio in economic cost, and grinding cost accounts for the 40 ~ 50% of total cost of production, in recent years I
The consumption of state's metal wear resistant material reaches hundreds of up to ten million tons, wherein abrading-ball is consumed more than 80%, and is ground in iron ore, coloured miberal powder
The abrading-ball consumed in mill about 72% accounts for about the 83% of the abrading-ball total amount of various industries.
Wherein, traditional austempering ductile iron (ADI) has excellent toughness, is preferred grinding ball material, still
Initial hardness is lower, generally in 50HRC or so, can not adapt to higher hardness requirement, and what is found out on this basis contains
Compared with the former, hardness, impact resistance and wear-resisting property have in various degree the austempering ductile iron (CADI) of carbide
Raising.
At present in the casting technique of CADI, still not forming professional standard, and the so big market demand is faced,
Also need the production method of CADI for being able to produce stabilised quality a kind of.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of preparation method of CADI abrading-ball.
Above-mentioned technical purpose of the invention has the technical scheme that a kind of preparation side of CADI abrading-ball
Method, comprising the following steps:
Raw material and auxiliary material are mixed by formula ratio, add in middle frequency furnace and smelted by S1；
S2 will complete the molten metal after smelting and import in mold, dam-type spheroidising packet carried out, to the metal liquid in electric furnace
Temperature reaches 1480-1550 DEG C, and metal liquid is come out of the stove；
S3 carries out the metal liquid for completing spheroidising in S2 to pour the processing of method spheroidization and inoculation, is transferred to casting ladle progress after the completion
Sample casting obtains casting sample using the processing of method spheroidization and inoculation is repeatedly poured when casting；
Casting sample obtained is carried out isothermal salt made from earth containing a comparatively high percentage of sodium chloride salt bath quenching processing by S4, and austenitizing temperature is 890 DEG C -940 DEG C when processing,
Soaking time is 1-3h, and equal quenching temperature is 230 DEG C -270 DEG C, isothermal time 1-3h, austempering medium 50%KNO3+40%
The compound of NaNO2+10%NaNO3；
Casting sample roll forming by the processing of S4 salt bath is rolled into the ball of required size by S5.
By using above-mentioned technical proposal, CADI abrading-ball high rigidity obtained, high tenacity have Work Hardening Characteristic, and
Wear away lower, not volatile circle, long service life.
The further setting of the present invention are as follows: raw material uses parts by weight for 87-92 parts of austenitic iron in the S1, auxiliary material
Component comprising following parts by weight:
C 3.4-3.8； Si 2.5-3； Mn 2.5-2.8； P 0-0.08；
S 0.01-0.02；Cr+V+Ti 0.5-2；Mg 0.03-0.05；Ce 0.01-0.03.
By using above-mentioned technical proposal, above-mentioned each component is added in austenitic iron, can effectively improve whole mill
The surface hardness of ball, especially carbide can improve the hardness of abrading-ball under the premise of keeping abrading-ball to have sufficiently ductile
To 56RC or more, and Cr+V+Ti can then form high rigidity particle, and disperse is in metallic matrix, by tough needle-shaped iron element
Body and rich carbon austenitic tightly include, not easily to fall off, become the skeleton of metallic matrix, to improve the abrasion resistance of abrading-ball.
The further setting of the present invention are as follows: use parts by weight for 1.0-1.5 parts of nodularization in the S3 when spheroidization and inoculation
Agent and 0.2-0.3 parts of inovulant.
The further setting of the present invention are as follows: the nodulizer is Mg8Re3, and the inovulant is 75FeSi.
By using above-mentioned technical proposal, it can be kept using nodulizer and inovulant and gradually be formed, be conducive to each component
Stable dispersion.
The further setting of the present invention are as follows: being additionally provided with parts by weight in the side that mold pours metal liquid in the S2 is
0.25-0.45 parts of pretreating agent, the pretreating agent are INOCULIN390.
By using above-mentioned technical proposal, be arranged pretreating agent can purifying molten metal body, reduce impurity content.
The further setting of the present invention are as follows: temperature is 1520-1550 DEG C when metal liquid is come out of the stove in the S2.
The further setting of the present invention are as follows: the raw material and auxiliary material include the pig iron, steel scrap, ferrosilicon, manganese iron, molybdenum-iron, ferrochrome,
Copper, ferro-boron and ferrotungsten.
By using above-mentioned technical proposal, above-mentioned material acquirement approach is more, reduces production cost.
The further setting of the present invention are as follows: finished product CADI abrading-ball is obtained after being rolled into ball in S5, then is tested, it is qualified
Product packaging transport, substandard product are returned in S1 and are re-worked.
By using above-mentioned technical proposal, stringent control, unqualified production can be carried out to product by increasing quality inspection procedure
Product are re-worked, and not only will not influence the quality of subsequent product, but also can make full use of substandard product, reduce loss.
In conclusion the invention has the following advantages: CADI abrading-ball high rigidity obtained, high tenacity, have processing
Hardening characteristics, and wear away lower, not volatile circle, long service life.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Embodiment 1: a kind of preparation method of CADI abrading-ball, as shown in Figure 1, include the following steps,
S1 selects raw material and auxiliary material and mixes, and wherein raw material and auxiliary material select the pig iron, steel scrap, ferrosilicon, manganese iron, ferrochrome, copper, molybdenum
Iron, ferro-boron and ferrotungsten are arranged in pairs or groups when choosing above-mentioned raw materials according to the component of following parts by weight:
87 parts of austenitic iron, 3.6 parts of C；3 parts of Si；2.8 parts of Mn；0.08 part of P；
0.01 part of S；0.5 part of Cr+V+Ti；0.03 part of Mg；0.01 part of Ce；
Raw material and auxiliary material, which are chosen and then be added in middle frequency furnace, to be smelted.
S2 will complete the molten metal after smelting and import in mold, and the side that mold pours metal liquid is also placed with parts by weight
The pretreating agent that number is 0.25 part, pretreating agent INOCULIN390, using dam-type spheroidising packet, to the gold in electric furnace
When category fluid temperature reaches 1520 DEG C, metal liquid is come out of the stove.
S3 carries out the metal liquid for completing spheroidising in S2 to pour the processing of method spheroidization and inoculation, is transferred to casting ladle after the completion
Sample casting is carried out, using the processing of method spheroidization and inoculation is repeatedly poured when casting, obtains casting sample.Wherein, 1 part of ball is added when processing
Agent is Mg8Re3, and 0.2 part of inovulant is 75FeSi.When processing, when method spheroidization and inoculation is poured in metal liquid completion, first exist
The inovulant that one third is stored in spheroidising packet, when metal liquid pours into spheroidising packet by electric furnace and reaches 1/3-2/3, then
The inovulant of one third is added, while pouring ladle memory is placed with other one third, to achieve the effect that Multi inoculation.
Casting sample obtained is carried out isothermal salt made from earth containing a comparatively high percentage of sodium chloride salt bath quenching processing by S4, and austenitizing temperature is 900 DEG C when processing, is protected
The warm time is 1h, and equal quenching temperature is 230 DEG C, isothermal time 1h, austempering medium 50%KNO3+40%NaNO2+10%
The compound of NaNO3.
S5 will be rolled into the ball of required size by the casting sample roll forming of S4 salt bath processing, using oblique when rolling
Milling train.
S6 will roll out the CADI abrading-ball come and carry out quality inspection, qualified product, that is, packed and transported, and substandard product is back to weight in S1
Newly smelted.Using inspecting by random samples in batches when quality inspection, metallographic structure, mechanical property and service performance are carried out to CADI abrading-ball and examined
Survey, obtain product Oxygen potential be 2 grades, 6 grades of ball grade, and metallic matrix tissue be lower bainite+retained austenite+carbide+stone
Tampon；Abrading-ball surface hardness is 54HRC, impact toughness value 15J/cm2, impact fatigue life 16000 times, up-to-standard.
Embodiment 2: a kind of preparation method of CADI abrading-ball, as shown in Figure 1, include the following steps,
S1 selects raw material and auxiliary material simultaneously to mix, wherein raw material and auxiliary material select the pig iron, steel scrap, ferrosilicon, manganese iron, molybdenum-iron, ferro-boron and
Ferrotungsten is arranged in pairs or groups when choosing above-mentioned raw materials according to the component of following parts by weight:
87 parts of austenitic iron, 3.4 parts of C；2.5 parts of Si；2.5 parts of Mn；0.08 part of P；
0.01 part of S；0.5 part of Cr+V+Ti；0.03 part of Mg；0.01 part of Ce；
Raw material and auxiliary material, which are chosen and then be added in middle frequency furnace, to be smelted.
S2 will complete the molten metal after smelting and import in mold, and the side that mold pours metal liquid is also placed with parts by weight
The pretreating agent that number is 0.45 part, pretreating agent INOCULIN390, using dam-type spheroidising packet, to the gold in electric furnace
When category fluid temperature reaches 1550 DEG C, metal liquid is come out of the stove.
S3 carries out the metal liquid for completing spheroidising in S2 to pour the processing of method spheroidization and inoculation, is transferred to casting ladle after the completion
Sample casting is carried out, using the processing of method spheroidization and inoculation is repeatedly poured when casting, obtains casting sample.Wherein, 1.5 parts are added when processing
Nodulizer is Mg8Re3, and 0.3 part of inovulant is 75FeSi.When processing, when method spheroidization and inoculation is poured in metal liquid completion, first
The inovulant that one third is stored in spheroidising packet, when metal liquid pours into spheroidising packet by electric furnace and reaches 1/3-2/3,
The inovulant of one third is added, while pouring ladle memory is placed with other one third, to achieve the effect that Multi inoculation.
Casting sample obtained is carried out isothermal salt made from earth containing a comparatively high percentage of sodium chloride salt bath quenching processing by S4, and austenitizing temperature is 930 DEG C when processing, is protected
The warm time is 3h, and equal quenching temperature is 270 DEG C, isothermal time 3h, austempering medium 50%KNO3+40%NaNO2+10%
The compound of NaNO3.
S5 will be rolled into the ball of required size by the casting sample roll forming of S4 salt bath processing, using oblique when rolling
Milling train.
S6 will roll out the CADI abrading-ball come and carry out quality inspection, qualified product, that is, packed and transported, and substandard product is back to weight in S1
Newly smelted.Using inspecting by random samples in batches when quality inspection, metallographic structure, mechanical property and service performance are carried out to CADI abrading-ball and examined
Survey, obtain product Oxygen potential be 2 grades, 6 grades of ball grade, and metallic matrix tissue be lower bainite+retained austenite+carbide+stone
Tampon；Abrading-ball surface hardness is 57HRC, impact toughness value 16J/cm2, impact fatigue life 16000 times, up-to-standard.
Claims (8)
1. a kind of preparation method of CADI abrading-ball, which comprises the following steps:
Raw material and auxiliary material are mixed by formula ratio, add in middle frequency furnace and smelted by S1；
S2 reaches 1480-1550 DEG C to the metal liquid temperature in electric furnace, metal liquid is come out of the stove, and will complete the gold after smelting
Belong to liquid to import in mold, carries out dam-type spheroidising packet；
S3 carries out the metal liquid for completing spheroidising in S2 to pour the processing of method spheroidization and inoculation, is transferred to casting ladle progress after the completion
Sample casting obtains casting sample using the processing of method spheroidization and inoculation is repeatedly poured when casting；
Casting sample obtained is carried out isothermal salt made from earth containing a comparatively high percentage of sodium chloride salt bath quenching processing by S4, and austenitizing temperature is 890 DEG C -940 DEG C when processing,
Soaking time is 1-3h, and equal quenching temperature is 230 DEG C -270 DEG C, isothermal time 1-3h, austempering medium 50%KNO3+40%
The compound of NaNO2+10%NaNO3；
Casting sample roll forming by the processing of S4 salt bath is rolled into the ball of required size by S5.
2. a kind of preparation method of CADI abrading-ball according to claim 1, it is characterised in that: raw material is using weight in the S1
The austenitic iron that number is 87-92 parts is measured, auxiliary material includes the component of following parts by weight:
C 3.4-3.8； Si 2.5-3； Mn 2.5-2.8； P 0-0.08；
S 0.01-0.02；Cr+V+Ti 0.5-2；Mg 0.03-0.05；Ce 0.01-0.03.
3. a kind of preparation method of CADI abrading-ball according to claim 2, it is characterised in that: in the S3 when spheroidization and inoculation
Use parts by weight for the inovulant of 1.0-1.5 parts of nodulizer and 0.2-0.3 part.
4. a kind of preparation method of CADI abrading-ball according to claim 3, it is characterised in that: the nodulizer is
Mg8Re3, the inovulant are 75FeSi.
5. a kind of preparation method of CADI abrading-ball according to claim 4, it is characterised in that: poured in the S2 in mold
The side of metal liquid is additionally provided with the pretreating agent that parts by weight are 0.25-0.45 parts, and the pretreating agent is
INOCULIN390。
6. a kind of preparation method of CADI abrading-ball according to claim 1, it is characterised in that: metal liquid goes out in the S2
Temperature is 1520-1550 DEG C when furnace.
7. a kind of preparation method of CADI abrading-ball according to claim 2, it is characterised in that: the raw material and auxiliary material include
The pig iron, steel scrap, ferrosilicon, manganese iron, molybdenum-iron, ferrochrome, copper, ferro-boron and ferrotungsten.
8. a kind of preparation method of CADI abrading-ball according to claim 1, it is characterised in that: obtained after being rolled into ball in S5
It to finished product CADI abrading-ball, then tests, qualified products packed and transported, substandard product is returned in S1 and re-worked.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257695A (en) * | 2019-07-08 | 2019-09-20 | 北京工业大学 | A kind of cupric CADI wear-resistant material and its heat treatment process |
| CN110964973A (en) * | 2019-12-25 | 2020-04-07 | 北京工业大学 | High-manganese CADI and heat treatment method thereof |
| CN112662936A (en) * | 2020-11-26 | 2021-04-16 | 安徽瑞泰新材料科技有限公司 | Low-abrasion alloying wear-resistant cast ball and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257695A (en) * | 2019-07-08 | 2019-09-20 | 北京工业大学 | A kind of cupric CADI wear-resistant material and its heat treatment process |
| CN110257695B (en) * | 2019-07-08 | 2020-07-17 | 北京工业大学 | Copper-containing CADI (copper-activated carbon dioxide) wear-resistant material and heat treatment process thereof |
| CN110964973A (en) * | 2019-12-25 | 2020-04-07 | 北京工业大学 | High-manganese CADI and heat treatment method thereof |
| CN112662936A (en) * | 2020-11-26 | 2021-04-16 | 安徽瑞泰新材料科技有限公司 | Low-abrasion alloying wear-resistant cast ball and preparation method thereof |
| CN112662936B (en) * | 2020-11-26 | 2022-04-05 | 安徽瑞泰新材料科技有限公司 | Low-abrasion alloying wear-resistant cast ball and preparation method thereof |
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Application publication date: 20190503 |