CN104439254A - Large scale hard alloy butting joint process - Google Patents
Large scale hard alloy butting joint process Download PDFInfo
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- CN104439254A CN104439254A CN201410605897.0A CN201410605897A CN104439254A CN 104439254 A CN104439254 A CN 104439254A CN 201410605897 A CN201410605897 A CN 201410605897A CN 104439254 A CN104439254 A CN 104439254A
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Abstract
The invention discloses a large scale hard alloy butting joint process which sequentially comprises the following steps that a material is divided into two sections or three sections and to be manufactured into hard alloy blanks in a burning mode according to the size of a component needing to be machined, and the diameter difference of every two adjacent blanks is 0.5-1mm; the butt joint faces of every two adjacent blanks are machined to meet the specific requirements; the connection portion of every two two adjacent blanks is coated with metal glue, and then the blanks are placed in a furnace for sintering; the temperature evenly raises to 680-720 DEG C in two hours during vacuum sintering, and the pressure is 0.5MPa; the temperature is kept for one hour; then the temperature evenly raises to 1180-1220 DEG C after three hours; the temperature is kept for two hours; then the temperature evenly raises to 1380-1420 DEG C after five hours, and the pressure raises to 2MPa after the temperature raises for one hour; then the pressure raises to 6MPa after the temperature is kept for two hours; finally, the temperature and the pressure are reduced to normal temperature and normal pressure in eleven hours, sintering is finished, and the blanks are machined to the required size. The process has the advantage that hard alloy products machined through the method can reach performance parameters of one-time sintered products.
Description
Technical field
The present invention relates to Large scale alloy butt-joint process.
Background technology
Owing to being subject to the size impact firing kiln, existing Large scale alloy product mainly refers to highly more than the product of 600mm, all cannot fire.
Summary of the invention
The object of the present invention is to provide Large scale alloy butt-joint process, effectively can solve the problem that existing Large scale alloy product cannot be fired.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions: Large scale alloy butt-joint process, comprises the following steps successively:
A. process the size of original paper as required, be divided into two sections or three sections be fired into hard alloy blank part, adjacent blank different diameters 0.5 ~ 1mm;
B. the face that adjacent blank will dock is worked into the requirement of regulation;
C. utilize the diameter difference of adjacent blank, at the junction coated with metal glue of two adjacent blanks, then put back in stove and sinter;
D. first within 2 times, homogeneous temperature is risen to 680-720 DEG C, pressure 0.5MPa during vacuum-sintering; Be incubated 1 hours again; And then homogeneous temperature is risen to 1180-1220 DEG C by 3 hours; Be incubated 2 hours again; Homogeneous temperature is risen to 1380 ~ 1420 DEG C in 5 hours again, wherein after 1 hour, pressure is risen to 2MPa in intensification; Then be incubated 2 hours and be pressurized to 6MPa; Eventually pass 11 hours and drop to normal temperature and pressure, complete sintering, reprocess the size required.
Preferably, in step B, adjacent blank requires that being worked into the depth of parallelism is 0.01mm, flatness 0.005mm, surface roughness 0.02 micron; Guarantee that two products can well bond together.
Preferably, dropped in the process of normal temperature and pressure at 11 hours in described step D, pressure is in uniform descent process, and temperature is down to 880-920 DEG C first 4 hours average rates, at the uniform velocity drop to 380-420 DEG C through 3 hours temperature again, eventually pass 4 hours and drop to normal temperature; Prevent carbide alloy in temperature-fall period from occurring the situation of cracking.
Compared with prior art, advantage of the present invention is: fired by Large scale alloy segments of product, then bonding mode is utilized to spell, sinter again, efficiently solve the problem of Large scale alloy product sintering, and can guarantee that the hart metal product adopting this method to process can reach the performance parameter of once sintered product.
Accompanying drawing explanation
Fig. 1 is the time-temperature curve figure of step D sintering in Large scale alloy butt-joint process of the present invention;
Fig. 2 is the time m-pressue-graph of step D sintering in Large scale alloy butt-joint process of the present invention.
Detailed description of the invention
Consult the embodiment that Fig. 1, Fig. 2 are Large scale alloy butt-joint process of the present invention, Large scale alloy butt-joint process, comprises the following steps successively:
A. process the size of original paper as required, be divided into two sections or three sections be fired into hard alloy blank part, this sintering procedure is fired according to existing disclosed carbide alloy burning techniques, adjacent blank different diameters 0.5 ~ 1mm;
B. adjacent blank being worked into the depth of parallelism is 0.01mm, flatness 0.005mm, surface roughness 0.02 micron;
C. utilize the diameter difference of adjacent blank, at the junction coated with metal glue of two adjacent blanks, then put back in stove and sinter;
D. first within 2 times, homogeneous temperature is risen to 680-720 DEG C, pressure 0.5MPa during vacuum-sintering; Be incubated 1 hours again; And then homogeneous temperature is risen to 1180-1220 DEG C by 3 hours; Be incubated 2 hours again; Homogeneous temperature is risen to 1380 ~ 1420 DEG C in 5 hours again, wherein after 1 hour, pressure is risen to 2MPa in intensification; Then be incubated 2 hours and be pressurized to 6MPa; Eventually pass 11 hours and drop to normal temperature and pressure, complete sintering, reprocess the size required.
Dropped in the process of normal temperature and pressure at 11 hours in described step D, pressure is in uniform descent process, and temperature is down to 880-920 DEG C first 4 hours average rates, more at the uniform velocity drops to 380-420 DEG C through 3 hours temperature, eventually passes 4 hours and drops to normal temperature.
Large scale alloy segments of product is fired, then bonding mode is utilized to spell, sinter again, efficiently solve the problem of Large scale alloy product sintering, and can guarantee that the hart metal product adopting this method to process can reach the performance parameter of once sintered product.
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 (3)
1. Large scale alloy butt-joint process, is characterized in that: comprise the following steps successively:
A. process the size of original paper as required, be divided into two sections or three sections be fired into hard alloy blank part, adjacent blank different diameters 0.5 ~ 1mm;
B. the face that adjacent blank will dock is worked into the requirement of regulation;
C. utilize the diameter difference of adjacent blank, at the junction coated with metal glue of two adjacent blanks, then put back in stove and sinter;
D. first within 2 times, homogeneous temperature is risen to 680-720 DEG C, pressure 0.5MPa during vacuum-sintering; Be incubated 1 hours again; And then homogeneous temperature is risen to 1180-1220 DEG C by 3 hours; Be incubated 2 hours again; Homogeneous temperature is risen to 1380 ~ 1420 DEG C in 5 hours again, wherein after 1 hour, pressure is risen to 2MPa in intensification; Then be incubated 2 hours and be pressurized to 6MPa; Eventually pass 11 hours and drop to normal temperature and pressure, complete sintering, reprocess the size required.
2. Large scale alloy butt-joint process as claimed in claim 1, is characterized in that: in step B, adjacent blank requires that being worked into the depth of parallelism is 0.01mm, flatness 0.005mm, surface roughness 0.02 micron.
3. Large scale alloy butt-joint process as claimed in claim 1, it is characterized in that: dropped in the process of normal temperature and pressure at 11 hours in described step D, pressure is in uniform descent process, temperature is down to 880-920 DEG C first 4 hours average rates, at the uniform velocity drop to 380-420 DEG C through 3 hours temperature again, eventually pass 4 hours and drop to normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410605897.0A CN104439254A (en) | 2014-10-31 | 2014-10-31 | Large scale hard alloy butting joint process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410605897.0A CN104439254A (en) | 2014-10-31 | 2014-10-31 | Large scale hard alloy butting joint process |
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| CN104439254A true CN104439254A (en) | 2015-03-25 |
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| CN201410605897.0A Pending CN104439254A (en) | 2014-10-31 | 2014-10-31 | Large scale hard alloy butting joint process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109079146A (en) * | 2018-08-29 | 2018-12-25 | 株洲硬质合金集团有限公司 | A kind of preparation method of hard alloy long cylinder |
| CN111906317A (en) * | 2020-06-16 | 2020-11-10 | 浙江恒成硬质合金有限公司 | Method for making up for defects of tungsten carbide hard alloy product |
Citations (5)
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| US3716347A (en) * | 1970-09-21 | 1973-02-13 | Minnesota Mining & Mfg | Metal parts joined with sintered powdered metal |
| JPS60259305A (en) * | 1984-06-01 | 1985-12-21 | Sumitomo Electric Ind Ltd | Composite tool and preparation thereof |
| JPH06287609A (en) * | 1993-03-31 | 1994-10-11 | Tokyo Seiko Co Ltd | Production of stepped cemented carbide material |
| CN102747242A (en) * | 2012-07-26 | 2012-10-24 | 株洲金鼎硬质合金有限公司 | Method for preparing large-size hard alloy |
| CN103521774A (en) * | 2013-10-22 | 2014-01-22 | 吴海勇 | Method for preparing diamond segment tool through self-propagating reaction |
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2014
- 2014-10-31 CN CN201410605897.0A patent/CN104439254A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3716347A (en) * | 1970-09-21 | 1973-02-13 | Minnesota Mining & Mfg | Metal parts joined with sintered powdered metal |
| JPS60259305A (en) * | 1984-06-01 | 1985-12-21 | Sumitomo Electric Ind Ltd | Composite tool and preparation thereof |
| JPH06287609A (en) * | 1993-03-31 | 1994-10-11 | Tokyo Seiko Co Ltd | Production of stepped cemented carbide material |
| CN102747242A (en) * | 2012-07-26 | 2012-10-24 | 株洲金鼎硬质合金有限公司 | Method for preparing large-size hard alloy |
| CN103521774A (en) * | 2013-10-22 | 2014-01-22 | 吴海勇 | Method for preparing diamond segment tool through self-propagating reaction |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109079146A (en) * | 2018-08-29 | 2018-12-25 | 株洲硬质合金集团有限公司 | A kind of preparation method of hard alloy long cylinder |
| CN111906317A (en) * | 2020-06-16 | 2020-11-10 | 浙江恒成硬质合金有限公司 | Method for making up for defects of tungsten carbide hard alloy product |
| 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 |
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Application publication date: 20150325 |
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