CN107937861A - A kind of hard alloy mends carbon method - Google Patents
A kind of hard alloy mends carbon method Download PDFInfo
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- CN107937861A CN107937861A CN201810021457.9A CN201810021457A CN107937861A CN 107937861 A CN107937861 A CN 107937861A CN 201810021457 A CN201810021457 A CN 201810021457A CN 107937861 A CN107937861 A CN 107937861A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
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Abstract
The invention belongs to material process technical field, and in particular to a kind of hard alloy mends carbon method, comprises the following steps：Hard alloy is put into vacuum drying oven and is heated to 1350 DEG C, keeps the temperature 30min；Methane gas is passed through in vacuum drying oven, hard alloy is heated to 1,360 1380 DEG C, 30 60min is kept the temperature, that is, completes.For the present invention using methane as carbon medium is mended, it mends carbon uniformity more preferably；The present invention mends carbon rear hearth and magazine even vacuum pipe etc. and does not have residual contamination, it is not necessary to clear up, can directly carry out the sintering of next stove product using methane as carbon medium is mended at the same time.
Description
Technical field
The invention belongs to material process technical field, and in particular to a kind of hard alloy mends carbon method.
Background technology
During CEMENTED CARBIDE PRODUCTION due to carbon amounts fluctuation, agglomerating plant is abnormal, dewaxing technique is improper etc. when often result in conjunction
Properties of product and product are produced considerable influence by the low situation of golden cobalt magnetic property.And Carbide Cobalt magnetic property index is sintering
One of core of process relativity, the height of cobalt magnetic directly react the height of carbon content in alloy, and carbon content is controlled and closed again
The component composition and phase structure of Binder Phase in golden main component, are that alloy uses to the strength character important of alloy
The important reference of performance quality.It is low for cobalt magnetic to sinter the unqualified type often occurred in cobalt magnetic control, it is low for cobalt magnetic
Product frequently with return treatment measures to return burnings, alloy is under conditions of there is certain amount liquid phase, is placed in by its principle
In carburizing environment, physical-chemical reaction occurs, achievees the purpose that to mend carbon, so as to improve the cobalt magnetic value of alloy.Carbon side is mended at present
Method is exactly traditional filler-hydrogen technique, that is, prepares the alumina packing of certain carbon content, will wait that returning processing alloy embedment is somebody's turn to do
Among filler, then lead to hydrogen sintering in three band Muffle furnaces, reach and mend carbon purpose.
But such a method is had a great influence by equipment, operation, technique etc., there is inconvenience in production.It is mainly manifested in：1、
The preparation accuracy of filler is poor：Needed in process for preparation the less graphite powder of density and density schmigel bigger than normal is fully mixed
Close uniformly, be not easy to prepare.2nd, used three type of furnace used with Muffle furnace for early stage production hard alloy, belongs to base
This superseded agglomerating plant, is restricted in equipment larger.3rd, need among pending alloy is embedded to filler, and burning in operation
Continuous boat pushing is handled during knot, extremely inconvenient in operation.4 sintered products performance uniformities are poor.
Chinese invention patent CN201510631588.5 discloses a kind of method that hard alloy mends carbon, including following step
Suddenly：One layer of buna liquid will be brushed on carbide surface or boat, be then placed in the sintering furnace vacuumized, be passed through 0.15
~0.25MPa argon gas, is heated to 1380 ~ 1450 DEG C, when sintering 1-2 is small, to obtain the final product.The present invention is by carbide surface brushing
One layer of buna liquid, is sintered again so that glue cracking produces activated carbon, product after there is liquid phase, these activated carbon
Incorporate alloy and cause former decarburization phase decomposition, finally so that product cobalt magnetic improves, operation is simple and reliable for this method, utilizes existing equipment
, can effectively improve the cobalt magnetic value of original product.
Periodical《Hard alloy》The 4th phase of volume 20 is published in December, 2013《Carbon in hard alloy atmosphere sintering process
Content adjusts》, Xiao Zhongwen opinion atmosphere is disclosed herein（CH4/H2）The test method of control, this method exist hard alloy
1000 DEG C, be passed through the methane, hydrogen gaseous mixture of certain pressure intensity, when insulation 3-4 is small after, it is found that the carbon content of hard alloy, hardness have
It is obvious to improve.
The content of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of hard alloy to mend carbon method.
In order to achieve the above object, present invention employs following technical proposal：
A kind of hard alloy mends carbon method, it is characterised in that：Comprise the following steps：
Step A, hard alloy is put into vacuum drying oven and is heated to 1350 DEG C, keep the temperature 30min；
Step B, methane gas is passed through in vacuum drying oven, hard alloy is heated to 1360-1380 DEG C, keeps the temperature 30-60min, i.e.,
Complete.
Methane gas is passed through in vacuum drying oven, methane carries out benefit carbon to hard alloy during returning burning, and it is bright that it mends carbon effect
It is aobvious.
Preferably, it is 4Kpa-18Kpa that vacuum furnace pressure after methane gas is passed through in the step B.According to alloy weight
The factor controlling furnace pressure 4KPa~18Kpa such as amount, cobalt magnetic value, trade mark property, after hard alloy mends carbon, its cobalt magnetic value, magnetic force
Value lifting higher.
The present invention has the following advantages：
1st, carbon uniformity is mended more preferably as carbon medium is mended using methane.
2nd, using methane as carbon medium is mended, carbon rear hearth and magazine even vacuum pipe etc. is mended and does not have residual dirt
Dye, it is not necessary to clear up, can directly carry out the sintering of next stove product.
Embodiment
The present invention is described in detail below.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1：
A kind of hard alloy mends carbon method, comprises the following steps：
The hard alloy of the trade mark in the inner embodiment 1 of table 1, shove charge weight, be put into vacuum drying oven and be heated to 1350 DEG C by step 1, protects
Warm 30min；
Step 2, make it that vacuum furnace pressure is 4Kpa after being passed through methane gas in vacuum drying oven, and hard alloy is heated to 1370
DEG C, 45min is kept the temperature, that is, is completed.
Embodiment 2：
A kind of hard alloy mends carbon method, comprises the following steps：
The hard alloy of the trade mark in the inner embodiment 2 of table 1, shove charge weight, be put into vacuum drying oven and be heated to 1350 DEG C by step 1, protects
Warm 30min；
Step 2, make it that vacuum furnace pressure is 4Kpa after being passed through methane gas in vacuum drying oven, and hard alloy is heated to 1370
DEG C, 45min is kept the temperature, that is, is completed.
Embodiment 3：
A kind of hard alloy mends carbon method, comprises the following steps：
The hard alloy of the trade mark in the inner embodiment 3 of table 1, shove charge weight, be put into vacuum drying oven and be heated to 1350 DEG C by step 1, protects
Warm 30min；
Step 2, make it that vacuum furnace pressure is 8Kpa after being passed through methane gas in vacuum drying oven, and hard alloy is heated to 1380
DEG C, 40min is kept the temperature, that is, is completed.
Embodiment 4：
A kind of hard alloy mends carbon method, comprises the following steps：
The hard alloy of the trade mark in the inner embodiment 4 of table 1, shove charge weight, be put into vacuum drying oven and be heated to 1350 DEG C by step 1, protects
Warm 30min；
Step 2, make it that vacuum furnace pressure is 4Kpa after being passed through methane gas in vacuum drying oven, and hard alloy is heated to 1380
DEG C, 60min is kept the temperature, that is, is completed.
Embodiment 2：
A kind of hard alloy mends carbon method, comprises the following steps：
The hard alloy of the trade mark in the inner embodiment 2 of table 1, shove charge weight, be put into vacuum drying oven and be heated to 1350 DEG C by step 1, protects
Warm 30min；
Step 2, make it that vacuum furnace pressure is 4Kpa after being passed through methane gas in vacuum drying oven, and hard alloy is heated to 1360
DEG C, 30min is kept the temperature, that is, is completed.
Cobalt magnetic value test is carried out to the hard alloy in embodiment 1-5, its test result is as shown in table 1.
Table 1
| Embodiment | The trade mark | Shove charge weight | Cobalt magnetic before benefit carbon | Cobalt magnetic after benefit carbon | Cobalt magnetic improves |
| Embodiment 1 | ZK20 | 16.5Kg | 5.02% | 5.42% | 0.40% |
| Embodiment 2 | ZK30 | 16.6Kg | 6.80% | 7.20% | 0.40% |
| Embodiment 3 | YW2 | 9.3Kg | 6.90% | 7.15% | 0.25% |
| Embodiment 4 | YW2 | 42Kg | 6.92% | 7.15% | 0.23% |
| Embodiment 5 | YW2 | 9.4Kg | 6.86% | 7.23% | 0.37% |
This hard alloy mends benefit carbon positive effect of the carbon method for hard alloy as can be seen from Table 1.
The invention is not limited in foregoing embodiment.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (2)
1. a kind of hard alloy mends carbon method, it is characterised in that：Comprise the following steps：
Step A, hard alloy is put into vacuum drying oven and is heated to 1350 DEG C, keep the temperature 30min；
Step B, methane gas is passed through in vacuum drying oven, hard alloy is heated to 1360-1380 DEG C, keeps the temperature 30-60min, i.e.,
Complete.
2. a kind of hard alloy according to claim 1 mends carbon method, it is characterised in that：Methane is passed through in the step B
Vacuum furnace pressure is 4Kpa-18Kpa after gas.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280790B (en) * | 2018-08-30 | 2020-04-28 | 晋城鸿刃科技有限公司 | Carbon supplementing method for hard alloy pre-sintering semi-finished product |
| CN111139429A (en) * | 2020-02-19 | 2020-05-12 | 株洲肯特硬质合金有限公司 | Method for carburizing hard alloy by utilizing carbon-containing gas cracked in sintering process |
| CN111906474A (en) * | 2020-07-03 | 2020-11-10 | 北京机电研究所有限公司 | High-carbon cobalt chromium tungsten welding wire and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965534A (en) * | 2012-11-13 | 2013-03-13 | 中南大学 | Preparation method of hard alloy with ultra-coarse grains on surface |
| CN106637052A (en) * | 2016-12-15 | 2017-05-10 | 潜江新锐硬质合金工具有限公司 | Method for improving carbon potential of low-carbon hard alloy |
-
2018
- 2018-01-10 CN CN201810021457.9A patent/CN107937861A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965534A (en) * | 2012-11-13 | 2013-03-13 | 中南大学 | Preparation method of hard alloy with ultra-coarse grains on surface |
| CN106637052A (en) * | 2016-12-15 | 2017-05-10 | 潜江新锐硬质合金工具有限公司 | Method for improving carbon potential of low-carbon hard alloy |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280790B (en) * | 2018-08-30 | 2020-04-28 | 晋城鸿刃科技有限公司 | Carbon supplementing method for hard alloy pre-sintering semi-finished product |
| CN111139429A (en) * | 2020-02-19 | 2020-05-12 | 株洲肯特硬质合金有限公司 | Method for carburizing hard alloy by utilizing carbon-containing gas cracked in sintering process |
| CN111139429B (en) * | 2020-02-19 | 2022-05-03 | 株洲肯特硬质合金股份有限公司 | Method for carburizing hard alloy by utilizing carbon-containing gas cracked in sintering process |
| CN111906474A (en) * | 2020-07-03 | 2020-11-10 | 北京机电研究所有限公司 | High-carbon cobalt chromium tungsten welding wire and preparation method thereof |
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Application publication date: 20180420 |