CN102220533A - Net-shaped structure hard alloy brazing sheet and preparation method thereof - Google Patents
Net-shaped structure hard alloy brazing sheet and preparation method thereof Download PDFInfo
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- CN102220533A CN102220533A CN 201110153891 CN201110153891A CN102220533A CN 102220533 A CN102220533 A CN 102220533A CN 201110153891 CN201110153891 CN 201110153891 CN 201110153891 A CN201110153891 A CN 201110153891A CN 102220533 A CN102220533 A CN 102220533A
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Abstract
The invention discloses a net-shaped structure hard alloy brazing sheet and a preparation method thereof. A certain amount of cobalt-based hard alloy granules with higher hardness are distributed on a nickel-based hard alloy net-shaped matrix with lower hardness, wherein the granule ratio is 75-80%; the rockwell hardness of the net-shaped hard alloy (HRA) is greater than or equal to 86 and the ratio of Ni to (Ni plus Co) is greater than or equal to 53.6%; in the matrix, Ni accounts for 30% and the balance is WC (Wolfram Carbide); in the granules, Co accounts for 5.5%-6.5% and the balance is WC; and after the granules are independently sintered, HRA is 90-92, Hc (Hydrocarbon Compounds) is 12-14kA/m. The preparation method includes the steps as follows: firstly, according to the requirements of the net-shaped matrix and the granules on components and properties, conducting dosing, wet grinding, drying and sieving; secondly doping a forming agent; by the first step, preparing slurry and by the second step, preparing granules; mixing the 75-80% granules with the slurry for 20-30min; drying the mixture in a drying oven, wherein the drying temperature is 80-95 DEG C; sieving and then pressing the dried mixture; and finally conducting sintering, wherein the temperature is 1340-1350 DEG C. The net-shaped structure hard alloy has high Ni content and high wear resistance, and the service life of the alloy can be as long as that of cobalt-based hard alloy.
Description
Technical field
The present invention relates to a kind of hard alloy with net-shaped structure pricker sheet, promptly microtexture has the brazing sheet of hard alloy of netted pattern, is specifically related to a kind of microtexture and has nickelic brazing sheet of hard alloy material of netted pattern and preparation method thereof.
Background technology
Brazing sheet of hard alloy pricker sheet is the efficient drilling tool that a class consumption is huge, application surface is broad, and mainly being used in resource exploration, energy extraction, engineering construction etc. needs rock drilling to bore the field of pick.Over past ten years, be the needs of the fast development of satisfying China's economic construction, rock drilling is bored the pick industry and is rapidly developed, and has directly promoted the demand of brazing sheet of hard alloy pricker sheet is increased considerably.At present, the pricker sheet of China's routine is as shown in table 1 with brazing sheet of hard alloy composition and performance.
The conventional pricker sheet of table 1 composition and the performance of brazing sheet of hard alloy
As seen, average cobalt contents has reached 10% in the brazing sheet of hard alloy.According to statistics, China's rock drilling industry at annual about 3000 tons, therefore, is 300 tons to the demand of cobalt to the demand of brazing sheet of hard alloy.And the cobalt metal is a kind of rare metal, at the reserves of China seldom, needs a large amount of imports, and costs an arm and a leg, and it is bigger fluctuate, surpassed 900,000 when the highest/ton.Comparatively speaking, metallic nickel has certain reserves in China, and the price of metallic nickel generally all is starkly lower than the cobalt valency.Because the performance and the cobalt of metallic nickel are approaching, can the alternative metals cobalt as the bonding phase of Wimet.Therefore, for a long time, many countries all adopt nickel to replace cobalt in research, have obtained successful application in some fields.Yet, because the hardness of nickel is far below cobalt, under the identical situation of matrix metal content, the hardness of carbide alloy of nickel-base will be lower than more than the cobalt base hard alloy 1HRA, makes that alloy wear-resisting decline is obvious, sees " CEMENTED CARBIDE PRODUCTION principle " (Wang Guodong for details, metallurgical industry press, P39).Therefore, can only replace cobalt by a spot of use nickel, generally the ratio in boning mutually is no more than 30%.When the ratio in nickel is boning mutually surpassed 30%, hardness of alloy and wear resistance obviously descended, thereby have reduced the practical effect that contains nickel hard alloy, have limited the application of nickeliferous brazing sheet of hard alloy in the rock drilling industry.
Summary of the invention
The purpose of this invention is to provide pricker sheet Wimet and preparation method thereof that a kind of nickel content is high and have high-wearing feature, this alloy has cancellated microscopic appearance, nickel content bonding mutually in ratio surpass 30%, reach more than 53.6%, can reach cobalt base hard alloy pricker sheet work-ing life its actual service life.
Hard alloy with net-shaped structure pricker sheet of the present invention is distributed with the cobalt base hard alloy granule of the another kind of high rigidity of some amount on the netted matrix of the lower carbide alloy of nickel-base of hardness; Granule shared part by weight in hard alloy with net-shaped structure pricker sheet is 75 ~ 80%; The hardness of netted brazing sheet of hard alloy is HRA 〉=86, Ni:(Ni+Co) 〉=53.6%.
The weight percent of nickel is 30% in the matrix, and surplus is WC.
The weight percent of cobalt is 5.5 ~ 6.5% in granule, and surplus is WC; Hardness HRA behind the independent sintering of granule is 90 ~ 92, and Coercive Force Hc is 12 ~ 14 kA/m.
The preparation method of hard alloy with net-shaped structure pricker sheet of the present invention may further comprise the steps successively: according to the composition and the performance requriements of netted matrix in the hard alloy with net-shaped structure pricker sheet, with raw material prepare burden, wet-milling, drying and screening, mix forming agent then, be prepared into slip; According to composition and the performance requriements in the hard alloy with net-shaped structure pricker sheet granule, with raw material prepare burden, wet-milling, drying and screening, mix forming agent then, be prepared into granule; With weight percent be 75 ~ 80% granule mix 20 ~ 30min with slip; Above-mentioned compound is dry in loft drier, 80 ~ 95 ℃ of drying temperatures; Mixture after the drying is sieved, then compacting; Carry out sintering at last, form hard alloy with net-shaped structure pricker sheet, sintering temperature: 1340 ~ 1350 ℃.
Hard alloy with net-shaped structure pricker sheet of the present invention, wherein the higher cobalt base hard alloy pricker sheet of hardness is as granule, the lower high carbide alloy of nickel-base pricker sheet of hardness is as netted matrix, because the hardness of granule is higher, so wear resistance is good, and the low good toughness of the hardness of matrix, thereby reached the unification of high-wearing feature and high tenacity, be applied to make mine hard alloy pricker sheet, have high wear resistance, reached the work-ing life of the essentially identical cobalt base hard alloy pricker of bonding phase content sheet.
Description of drawings
Fig. 1 is the microtexture photo (X500) of hard alloy with net-shaped structure pricker sheet of the present invention.
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment
Embodiment 1: hard alloy with net-shaped structure pricker sheet---YN20 trade mark material and preparation method thereof
YN20 trade mark material is by A
#Material and B
#Material is composited, and is used to make the pricker sheet, wherein A
#Material is used to prepare brazing sheet of hard alloy granule, B
#Material is used to prepare the carbide filler sheet matrix.Its composition and performance are as shown in table 2, and weight percent is 80:20.
At first according to A in the table 2
#Composition require batching, adopt the preparation method of conventional Wimet, that is: after the batching, in the 300L ball mill, carry out wet-milling, ratio of grinding media to material is 3:1, grinding medium is an alcohol, dosage is 300mL/kg, wet-milling time 30 ~ 40h; Cross 400 eye mesh screens after the wet-milling, dry again, 80 ~ 95 ℃ of drying temperatures; Sieve after the drying, mix forming agent then, granulate.A
#Performance representative value behind the sampling sintering is as shown in table 2,1450 ± 10 ℃ of sintering temperatures.
B
#The preparation technology and the above-mentioned technology of trade mark material Wimet are basic identical, but do not granulate after mixing forming agent, but form slip.B
#Performance representative value behind the sampling sintering is as shown in table 2,1400 ± 10 ℃ of sintering temperatures.
With weight percent be 80:20 A
#Granule and B
#Slip mixes 20 ~ 30min; Above-mentioned compound is dry in loft drier, 80 ~ 95 ℃ of drying temperatures; Mixture after the drying is crossed 60 mesh sieves, then compacting; Carry out sintering at last, sintering temperature: 1340～1350 ℃.Its finished product performance representative value is as shown in table 2.Ni:(Ni+Co wherein)=57.7%.On probationly through the scene show that in rock stratum hardness f14 ~ f16 level hard formation rock drilling, the rock drilling drilling depth of the YN20 trade mark is consistent with the trade mark shown in the table 1, has reached 18 ~ 20 meters, and the brazing sheet of hard alloy drilling depth of the identical uniform texture of YN20 trade mark composition have only 4 ~ 5 meters.
The composition of table 2 alloy and performance
Embodiment 2: hard alloy with net-shaped structure pricker sheet---YN25 trade mark material and preparation method thereof
YN25 trade mark material is by C
#Material and B
#Material is composited, and is used to make the pricker sheet, wherein C
#Material is used to prepare brazing sheet of hard alloy granule, B
#Material is used to prepare the carbide filler sheet matrix.Its composition and performance are as shown in table 2, and weight percent is 80:20.
At first according to C in the table 2
#Composition require batching, adopt the preparation method of conventional Wimet, that is: after the batching, in the 300L ball mill, carry out wet-milling, ratio of grinding media to material is 3:1, grinding medium is an alcohol, dosage is 300mL/kg, wet-milling time 30 ~ 40h; Cross 400 eye mesh screens after the wet-milling, dry again, 80 ~ 95 ℃ of drying temperatures; Sieve after the drying, mix forming agent then, granulate.C
#Performance representative value behind the sampling sintering is as shown in table 3,1450 ± 10 ℃ of sintering temperatures.
B
#The preparation technology and the above-mentioned technology of trade mark material Wimet are basic identical, but do not granulate after mixing forming agent, but form slip.B
#Performance representative value behind the sampling sintering is as shown in table 2,1400 ± 10 ℃ of sintering temperatures.
With weight percent be 80:20 C
#Granule and B
#Slip mixes 20 ~ 30min; Above-mentioned compound is dry in loft drier, 80 ~ 95 ℃ of drying temperatures; Mixture after the drying is crossed 60 mesh sieves, then compacting; Carry out sintering at last, sintering temperature: 1340～1350 ℃.Its finished product performance representative value is as shown in table 2.Ni:(Ni+Co wherein)=53.6%.On probationly through the scene show that in rock stratum hardness f14 ~ f16 level hard formation rock drilling, the rock drilling drilling depth of the YN25 trade mark has reached 16 ~ 18 meters, and the brazing sheet of hard alloy drilling depth of the identical uniform texture of YN25 trade mark composition has only below 4 meters.
The composition of table 3 alloy and performance
Embodiment 3: hard alloy with net-shaped structure pricker sheet---YN30 trade mark material and preparation method thereof
YN30 trade mark material is by C
#Material and B
#Material is composited, and is used to make the pricker sheet, wherein C
#Material is used to prepare brazing sheet of hard alloy granule, B
#Material is used to prepare the carbide filler sheet matrix.Its composition and performance are as shown in table 2, and weight percent is 75:25.
At first according to C in the table 4
#Composition require batching, adopt the preparation method of conventional Wimet, that is: after the batching, in the 300L ball mill, carry out wet-milling, ratio of grinding media to material is 3:1, grinding medium is an alcohol, dosage is 300mL/kg, wet-milling time 30 ~ 40h; Cross 400 eye mesh screens after the wet-milling, dry again, 80 ~ 95 ℃ of drying temperatures; Sieve after the drying, mix forming agent then, granulate.C
#Performance representative value behind the sampling sintering is as shown in table 2,1450 ± 10 ℃ of sintering temperatures.
B
#The preparation technology and the above-mentioned technology of trade mark material Wimet are basic identical, but do not granulate after mixing forming agent, but form slip.B
#Performance representative value behind the sampling sintering is as shown in table 4,1400 ± 10 ℃ of sintering temperatures.
With weight percent be 75:25 C
#Granule and B
#Slip mixes 20 ~ 30min; Above-mentioned compound is dry in loft drier, 80 ~ 95 ℃ of drying temperatures; Mixture after the drying is crossed 60 mesh sieves, then compacting; Carry out sintering at last, sintering temperature: 1340～1350 ℃.Its finished product performance representative value is as shown in table 2.Ni:(Ni+Co wherein)=60.5%.On probation the showing through the scene, in rock stratum hardness f10 ~ f12 level soft formation rock drilling, the rock drilling drilling depth of the YN30 trade mark reaches 30 meters, with the trade mark shown in the table 1 near (35 ~ 40 meters), and the brazing sheet of hard alloy drilling depth of the identical uniform texture of YN30 trade mark composition has only 12 ~ 15 meters.
The composition of table 4 alloy and performance
Claims (4)
1. a hard alloy with net-shaped structure pricker sheet is characterized in that: the cobalt base hard alloy pricker sheet granule that is distributed with the another kind of high rigidity of some amount on the lower netted matrix of carbide alloy of nickel-base pricker sheet of hardness; Described granule shared part by weight in hard alloy with net-shaped structure pricker sheet is 75 ~ 80%; The hardness of described netted brazing sheet of hard alloy is HRA 〉=86, Ni:(Ni+Co) 〉=53.6%.
2. hard alloy with net-shaped structure pricker sheet as claimed in claim 1 is characterized in that: the weight percent of nickel is 30% in the described matrix, and surplus is WC.
3. hard alloy with net-shaped structure pricker sheet as claimed in claim 1 is characterized in that: the weight percent of cobalt is 5.5 ~ 6.5% in described, and surplus is WC; Hardness HRA behind the independent sintering of described granule is 90 ~ 92, and Coercive Force Hc is 12 ~ 14 kA/m.
4.4 the preparation method of hard alloy with net-shaped structure pricker sheet as claimed in claim 1 is: according to the composition and the performance requriements of netted matrix in the described hard alloy with net-shaped structure pricker of claim 2 sheet, with raw material prepare burden, wet-milling, drying and screening, mix forming agent then, be prepared into slip; According to composition and the performance requriements in the described hard alloy with net-shaped structure pricker of claim 3 sheet granule, with raw material prepare burden, wet-milling, drying and screening, mix forming agent then, be prepared into granule; With weight percent be 75 ~ 80% granule mix 20 ~ 30min with slip; Above-mentioned compound is dry in loft drier, 80 ~ 95 ℃ of drying temperatures; Mixture after the drying is sieved, then compacting; Carry out sintering at last, form hard alloy with net-shaped structure pricker sheet, sintering temperature: 1340 ~ 1350 ℃.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131207A (en) * | 2014-08-18 | 2014-11-05 | 荆州荆天明建硬质合金制品有限公司 | Meshed-structure hard alloy for preparing hard alloy nozzle |
| CN106011580A (en) * | 2016-06-03 | 2016-10-12 | 广东工业大学 | Multistage composite metal ceramic, preparation method of multistage composite metal ceramic and shield cutter |
| CN106011579A (en) * | 2016-06-03 | 2016-10-12 | 广东工业大学 | Multi-stage composite metal ceramic, preparation method thereof and shield cutter |
| CN106191498A (en) * | 2016-06-23 | 2016-12-07 | 浙江恒成硬质合金有限公司 | A kind of hard alloy with net-shaped structure preparation method |
| CN109249027A (en) * | 2018-08-22 | 2019-01-22 | 株洲欧科亿数控精密刀具股份有限公司 | A kind of hard alloy numerical control blade of layer structure and preparation method thereof |
| CN111270121A (en) * | 2020-03-27 | 2020-06-12 | 赣州有色冶金研究所 | Preparation method and application of hard alloy with net-shaped structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131207A (en) * | 2014-08-18 | 2014-11-05 | 荆州荆天明建硬质合金制品有限公司 | Meshed-structure hard alloy for preparing hard alloy nozzle |
| CN106011580A (en) * | 2016-06-03 | 2016-10-12 | 广东工业大学 | Multistage composite metal ceramic, preparation method of multistage composite metal ceramic and shield cutter |
| CN106011579A (en) * | 2016-06-03 | 2016-10-12 | 广东工业大学 | Multi-stage composite metal ceramic, preparation method thereof and shield cutter |
| CN106011580B (en) * | 2016-06-03 | 2018-01-02 | 广东工业大学 | A kind of multistage composite cermet, its preparation method and shield cutter |
| CN106191498A (en) * | 2016-06-23 | 2016-12-07 | 浙江恒成硬质合金有限公司 | A kind of hard alloy with net-shaped structure preparation method |
| CN109249027A (en) * | 2018-08-22 | 2019-01-22 | 株洲欧科亿数控精密刀具股份有限公司 | A kind of hard alloy numerical control blade of layer structure and preparation method thereof |
| CN111270121A (en) * | 2020-03-27 | 2020-06-12 | 赣州有色冶金研究所 | Preparation method and application of hard alloy with net-shaped structure |
| CN111270121B (en) * | 2020-03-27 | 2021-01-05 | 赣州有色冶金研究所 | Preparation method and application of hard alloy with net-shaped structure |
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