CN103695835B - A kind of Hard alloy filler repair technology - Google Patents
A kind of Hard alloy filler repair technology Download PDFInfo
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- CN103695835B CN103695835B CN201310672379.6A CN201310672379A CN103695835B CN 103695835 B CN103695835 B CN 103695835B CN 201310672379 A CN201310672379 A CN 201310672379A CN 103695835 B CN103695835 B CN 103695835B
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Abstract
The present invention relates to a kind of Hard alloy filler repair technology, be intended to solve hart metal product in prior art and cause the problem of serious waste because repairing difficulty.A kind of Hard alloy filler repair technology, mainly comprises following processing step: rejected region polishing, the preheating of rejected region burn into product, supersonic speed thermal-flame spraying machine are to rejected region filler, exert pressure to repairing position, product carried out to ageing treatment, carry out double sintering.A kind of complete processing provided by the invention is by the technique to hart metal product defective position supplementary material, effectively can solve Wimet and waste serious problem, often repair the cost allowance that one kilogram of product can reduce 150 yuan, can reduce by the cost allowance of tens0000 every year.
Description
Technical field
The present invention relates to a kind of Hard alloy filler repair technology.
Background technology
When there is defect in existing Wimet, mainly through following two kinds of means process, carry out when defect is less returning and burn process, returning firing technique is by unnecessary amount is transferred to few one side by deformation, process in same axis, directly must be scrapped when defect is more in two sides; Return firing technique can only to surplus difference be 0.5 or thin-wall product process; If all lack surplus inside and outside some products, can only scrap process, some product height also can only scrap process without surplus, and a Wimet company has the surplus defect waste product of 1 ~ 2 ton to produce waste product in market devaluation flowing every year, causes the very big wasting of resources.
Summary of the invention
The invention provides a kind of Hard alloy filler repair technology, be intended to solve hart metal product in prior art and cause the problem of serious waste because repairing difficulty.
In order to solve above technical problem, the present invention is achieved through the following technical solutions: a kind of Hard alloy filler repair technology, comprises following processing step successively:
A, light is shown in the defect part grinder buffing of product;
B, to corrode with the burnishing part of corrosive fluid to product;
C, under 200 DEG C ~ 250 DEG C environment, thermal pretreatment is carried out to the product after step B process;
D, by cobalt contents be 20% ~ 30% cobalt coated tungsten carbide powder axis or side direction send flame flow to, the defect part of product after preheating is sprayed repeatedly, until meet the requirements of thickness, the speed of described flame flow in 1500m/s ~ 2000m/s, temperature is in 2900 DEG C ~ 3100 DEG C;
E, repair to through the patched product of step D the pressure that position graphite cake applies 3 ~ 5 kilograms;
F, the product that step e is pressurizeed is placed in vacuum sintering furnace, vacuumizes in vacuum sintering furnace, make the temperature in vacuum sintering furnace rise to 100 DEG C ~ 150 DEG C fast, by product vacuum sintering furnace inside holding two hours;
G, by normal product sintering process, the product through step F process is carried out double sintering, after double sintering completes, remove pressure.
Further, the corrosive fluid described in step B is the aqueous solution of the Tripotassium iron hexacyanide and potassium hydroxide, and in the aqueous solution, the ratio of the Tripotassium iron hexacyanide, potassium hydroxide and water is followed successively by 1:1:10; Good to product corrosive effect.
Further, cobalt coated tungsten carbide powder mean particle sizes is 0.6um ~ 0.8um in step D; Be conducive to obtaining high, the fine and close quality coating of bonding strength.
Further, in the spraying process of step D, argon gas is adopted to carry out cooling protection; Anti-oxidation.
Further, the cobalt contents of described cobalt coated tungsten carbide powder is not less than the cobalt contents of product in step D; Improve the content of cobalt, be convenient to improve adhesive effect.
Further, in the spraying process of step D, flame used is 3000 DEG C, and is produced by the burning of oxygen and hydrogen; Adopt oxyhydrogen flame to compare environmental protection, and be easy to realize processing operation accurately.
Further, the operating process of step e completed before product does not cool completely; Reduce calorific loss, save energy.
Further, in step G, the top temperature of double sintering is higher than original sintering temperature 5 DEG C ~ 10 DEG C; Be convenient to improve adhesive effect.
Compared with prior art advantage of the present invention is: a kind of complete processing provided by the invention is by the technique to hart metal product defective position supplementary material, effectively can solve Wimet and waste serious problem, often repair the cost allowance that one kilogram of product can reduce 150 yuan, can reduce by the cost allowance of tens0000 every year.
Embodiment
A kind of Hard alloy filler repair technology, comprises following processing step successively:
A, light is shown in the defect part grinder buffing of product;
B, to corrode with the burnishing part of corrosive fluid to product;
C, under 200 DEG C ~ 250 DEG C environment, thermal pretreatment is carried out to the product after step B process; Be conducive to the combination with spray below;
D, by cobalt contents be 20% ~ 30% cobalt coated tungsten carbide powder axis or side direction send flame flow to, the defect part of product after preheating is sprayed repeatedly, until meet the requirements of thickness, the speed of described flame flow in 1500m/s ~ 2000m/s, temperature is in 2900 DEG C ~ 3100 DEG C, because the speed height spraying particle of flame flow is when being heated to thawing or half melting state, the speed up to 300 ~ 650m/s can be accelerated to simultaneously, thus it is high to obtain bonding strength, fine and close quality coating, supersonic flame is due to the restriction by burning flame stream temperature, compared with plasma heat source, speed is high and temperature is low is about 3000 DEG C, for cobalt coated tungsten carbide series hard metal, effectively can suppress the decomposition of wolfram varbide in spraying process, coating not only bonding strength is high, fine and close, and the hard, wear-resistant wolfram varbide phase that can retain to greatest extent in powder, therefore, rejected region abrasion resistance properties after reparation is superior, carry out this step, the density of repair part can realize the product density of 85%,
E, repair to through the patched product of step D the pressure that position graphite cake applies 3 ~ 5 kilograms; When sintering temperature is more than 1300 °, product and coating become liquid-solid phase simultaneously, have carried out combining closely of two faces for overcoming two solid phase surface tension force by the coating applying pressure of graphite cake to spraying position;
F, step e is applied the product after pressure be placed in vacuum sintering furnace, vacuumize in vacuum sintering furnace, make the temperature in vacuum sintering furnace rise to 100 DEG C ~ 150 DEG C fast, by product vacuum sintering furnace inside holding two hours;
G, by normal product sintering process, the product through step F process is carried out double sintering, after double sintering completes, remove pressure; When having carried out this step, the density of repair part can realize the product density of 99%.
Corrosive fluid described in step B is the aqueous solution of the Tripotassium iron hexacyanide and potassium hydroxide, and in the aqueous solution, the ratio of the Tripotassium iron hexacyanide, potassium hydroxide and water is followed successively by 1:1:10; Cobalt coated tungsten carbide powder mean particle sizes is 0.6um ~ 0.8um in step D; In the spraying process of step D, adopt argon gas to carry out cooling protection; The cobalt contents of described cobalt coated tungsten carbide powder is not less than the cobalt contents of product in step D; In the spraying process of step D, flame used is 3000 DEG C, and is produced by the burning of oxygen and hydrogen; The operating process of step e completed before product does not cool completely; In step G, the top temperature of double sintering is higher than original sintering temperature 5 DEG C ~ 10 DEG C.
A kind of complete processing provided by the invention is by the technique to hart metal product defective position supplementary material, effectively can solve Wimet and waste serious problem, often repair the cost allowance that one kilogram of product can reduce 150 yuan, can reduce by the cost allowance of tens0000 every year, and the density of reparation part can reach 99% of product density, repairing effect is fine.
The foregoing is only specific embodiments of the invention, but technical characteristic of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and the change done or modification are all encompassed among the scope of the claims of the present invention.
Claims (8)
1. a Hard alloy filler repair technology, is characterized in that: comprise following processing step successively:
A, light is shown in the defect part grinder buffing of product;
B, to corrode with the burnishing part of corrosive fluid to product;
C, under 200 DEG C ~ 250 DEG C environment, thermal pretreatment is carried out to the product after step B process;
D, by cobalt contents be 20% ~ 30% cobalt coated tungsten carbide powder axis or side direction send flame flow to, the defect part of product after preheating is sprayed repeatedly, until meet the requirements of thickness, the speed of described flame flow in 1500m/s ~ 2000m/s, temperature is in 2900 DEG C ~ 3100 DEG C;
E, repair to through the patched product of step D the pressure that position graphite cake applies 3 ~ 5 kilograms;
F, the product that step e is pressurizeed is placed in vacuum sintering furnace, vacuumizes in vacuum sintering furnace, make the temperature in vacuum sintering furnace rise to 100 DEG C ~ 150 DEG C fast, by product vacuum sintering furnace inside holding two hours;
G, by normal product sintering process, the product through step F process is carried out double sintering, after double sintering completes, remove pressure.
2. a kind of Hard alloy filler repair technology according to claim 1, it is characterized in that: the corrosive fluid described in step B is the aqueous solution of the Tripotassium iron hexacyanide and potassium hydroxide, in the aqueous solution, the ratio of the Tripotassium iron hexacyanide, potassium hydroxide and water is followed successively by 1:1:10.
3. a kind of Hard alloy filler repair technology according to claim 1, is characterized in that: cobalt coated tungsten carbide powder mean particle sizes is 0.6 μm ~ 0.8 μm in step D.
4. a kind of Hard alloy filler repair technology according to claim 1, is characterized in that: in the spraying process of step D, adopt argon gas to carry out cooling protection.
5. a kind of Hard alloy filler repair technology according to claim 1, is characterized in that: the cobalt contents of described cobalt coated tungsten carbide powder is not less than the cobalt contents of product in step D.
6. a kind of Hard alloy filler repair technology according to claim 1, is characterized in that: in the spraying process of step D, flame used is 3000 DEG C, and is produced by the burning of oxygen and hydrogen.
7. a kind of Hard alloy filler repair technology according to claim 1, is characterized in that: the operating process of step e completed before product does not cool completely.
8. a kind of Hard alloy filler repair technology according to claim 1, is characterized in that: in step G, the top temperature of double sintering is higher than original sintering temperature 5 DEG C ~ 10 DEG C.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104388721B (en) * | 2014-10-31 | 2016-07-06 | 浙江恒成硬质合金有限公司 | The alloy product sintering process that high cobalt is bonding |
| CN104498684B (en) * | 2015-01-19 | 2017-01-25 | 四川科力特硬质合金股份有限公司 | Decarburization method for hard alloy in vacuum sintering furnace |
| CN105127432A (en) * | 2015-09-29 | 2015-12-09 | 浙江恒成硬质合金有限公司 | Preparation method of graded cemented carbide |
| CN111906317B (en) * | 2020-06-16 | 2023-03-24 | 浙江恒成硬质合金有限公司 | Method for making up for defects of tungsten carbide hard alloy product |
| CN111957978A (en) * | 2020-08-19 | 2020-11-20 | 龙泉市陈栋剑铺 | Sword light hammer forging, smelting and repairing process and processing equipment thereof |
| CN114029491B (en) * | 2021-10-22 | 2023-08-01 | 浙江恒成硬质合金有限公司 | Method for repairing inner hole of hard alloy blank |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242332A (en) * | 2011-06-20 | 2011-11-16 | 江铃汽车股份有限公司 | Meltallizing surface treatment process |
| CN102554552A (en) * | 2012-01-30 | 2012-07-11 | 重庆生竹科技发展有限公司 | Repair method for thin hollow roller |
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| JPS58147552A (en) * | 1982-02-25 | 1983-09-02 | Hitachi Metals Ltd | Composite jig and tool material and its manufacture |
| DE102005008487C5 (en) * | 2005-02-24 | 2011-08-18 | Praxair S.T. Technology, Inc., Conn. | Coated body of carbon fiber reinforced plastic for paper and printing machines, in particular roller, and method for producing such a body |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242332A (en) * | 2011-06-20 | 2011-11-16 | 江铃汽车股份有限公司 | Meltallizing surface treatment process |
| CN102554552A (en) * | 2012-01-30 | 2012-07-11 | 重庆生竹科技发展有限公司 | Repair method for thin hollow roller |
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