CN102990067A - Rotor of cam rotor pump and preparation method thereof - Google Patents
Rotor of cam rotor pump and preparation method thereof Download PDFInfo
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- CN102990067A CN102990067A CN2012104905583A CN201210490558A CN102990067A CN 102990067 A CN102990067 A CN 102990067A CN 2012104905583 A CN2012104905583 A CN 2012104905583A CN 201210490558 A CN201210490558 A CN 201210490558A CN 102990067 A CN102990067 A CN 102990067A
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Abstract
The invention relates to a rotor of a cam rotor pump and a preparation method thereof. The rotor of the cam rotor pump comprises a rotor body and a boronizing layer arranged on the rotor body, wherein the component of the rotor body comprises the ingredients by weight percent: 0.6-1.2% of carbon, 0.3-0.65% of silicon, 0.03-0.035% of titanium, 0.04-0.047% of boron, 0.015-0.023% of chromium, 0.32-0.35% of manganese, 0.02-0.025% of molybdenum, 0.3-0.5% of zinc, 0.0001-0.0005% of cerium, the balance of iron and inevitable impurities. By adopting this technical scheme, the problem of the compactness caused by casting can be effectively avoided; the efficiency of the cam rotor pump is guaranteed, and the wear-resisting property of the rotor is also guaranteed by boronizing treatment.
Description
Technical field
The invention belongs to the pump field, refer to especially a kind of rotor for lobed rotor pump and preparation method.
Background technology
Lobed rotor pump is the multi-purpose bidirectional displacement pump, and lobed rotor pump adopts two rotors that are synchronized with the movement, and rotor carries out transmission by a pair of external synchronous gear box.Rotor carries out the synchronous backward rotation under the drive of power transmission shaft, thereby forms higher vacuum and blowdown presssure between two rotors.Maintain certain gap between the rotor of lobe pump and the rotor, without coefficient of friction, dismounting is simple, can guarantee the continuity maintainability and without leak time, long service life.But also there is defective in lobed rotor pump, and namely discharge pressure is lower, is generally below the 1.6MPa, and in transmission course, rotor is transmitted the generation that frictional force is arranged between the material together, and produces easily cavitation.
The rotor of existing lobed rotor pump adopts casting technique to produce basically, but casting technique has the compactness problem of foundry goods, when rotor and be transferred the appearance that frictional force between the material can cause sand holes, the vacuum of impact between two rotors affects the transmission of pressure of material.
Summary of the invention
The purpose of this invention is to provide a kind of lobed rotor pump rotor material, by the technical program, can effectively avoid because the compactness problem appears in casting, guarantee the efficient of lobed rotor pump.
The present invention is achieved by the following technical solutions:
A kind of cam follower pump rotor includes rotor body and the boride layer that is positioned on the rotor body.
The thickness of described boride layer is the 0.1-1.2 millimeter.
The composition of described rotor body, be by weight percentage, the chromium of the titanium of the carbon of 0.6-1.2%, the silicon of 0.3-0.65%, 0.03-0.035%, the boron of 0.04-0.047%, 0.015-0.023%, the manganese of 0.32-0.35%, the molybdenum of 0.02-0.025%, the cerium of 0.0001-0.0005%, surplus is iron and inevitable impurity.
Described cerium is that to contain cerium be that the cerium-iron alloy mode of 10% percentage by weight adds.
Described cam follower pump rotor preparation method is,
Batching, be by weight percentage, the chromium of the titanium of the carbon of 0.6-1.2%, the silicon of 0.3-0.65%, 0.03-0.035%, the boron of 0.04-0.047%, 0.015-0.023%, the manganese of 0.32-0.35%, the molybdenum of 0.02-0.025%, the cerium of 0.0001-0.0005%, surplus are that iron and inevitable impurity calculate batching;
Batch mixing was with the powder of said mixture after adding zinc stearate in batch mixer batch mixing 30-60 minute;
Compacting is suppressed 10-60 with mould and is made base substrate second under 650-750MPa;
Sintering is fired in special furnace, is 650-700 ℃ of pre-burning 2 hours in temperature at first, and then band heat is suppressed shaping under 150-200MPa pressure, at 1250-1350 ℃ of lower sintering 1-2 hour, cools to 450-480 ℃ again;
Boronising is put into boriding medium with base substrate and is carried out the boronising processing;
Quench, quench the base substrate after will processing through boronising is incubated 2 hours in 780-850 ℃ glowing furnace after, quench minute two stages, first stage is that constant temperature is quenched to 550-580 ℃; Quench rates is no more than 15 ℃/minute, and second stage is that nature quenches, be quenched to 130-150 ℃ after, enter annealing furnace;
Insulation was cooled to 130-150 after 2 hours in 550-600 ℃ of annealing furnace; Insulation is 3 hours after being tempered to 200-220 ℃ again, cooling.
Described boriding medium is 25% borax, 11% potassium fluoborate and the graphite of surplus by weight percentage.
Described quenching medium is the salt bath quenching agent that is comprised of by 1: 1 weight ratio potassium nitrate and sodium nitrate.
The beneficial effect that the present invention compares with prior art is:
By the technical program, can effectively avoid because the compactness problem appears in casting, guarantee the efficient of lobed rotor pump.And by the boronising processing, guaranteed the anti-wear performance of rotor.
Description of drawings
Fig. 1 is cam follower pump rotor schematic cross-section of the present invention.
The specific embodiment
Below describe technical scheme of the present invention in detail by specific embodiment, should be understood that following embodiment only is used for explaining the present invention and can not be interpreted as to be limitation of the present invention.
A kind of cam follower pump rotor includes rotor body 11 and the boride layer 12 that is positioned on the rotor body.
The thickness of described boride layer is the 0.1-1.2 millimeter.
The composition of described rotor body, be by weight percentage, the chromium of the titanium of the carbon of 0.6-1.2%, the silicon of 0.3-0.65%, 0.03-0.035%, the boron of 0.04-0.047%, 0.015-0.023%, the manganese of 0.32-0.35%, the molybdenum of 0.02-0.025%, the cerium of 0.0001-0.0005%, surplus is iron and inevitable impurity.
Described cerium is that to contain cerium be that the cerium-iron alloy mode of 10% percentage by weight adds.
Described cam follower pump rotor preparation method is,
Batching, be by weight percentage, the chromium of the titanium of the carbon of 0.6-1.2%, the silicon of 0.3-0.65%, 0.03-0.035%, the boron of 0.04-0.047%, 0.015-0.023%, the manganese of 0.32-0.35%, the molybdenum of 0.02-0.025%, the cerium of 0.0001-0.0005%, surplus are that iron and inevitable impurity calculate batching;
Batch mixing was with the powder of said mixture after adding zinc stearate in batch mixer batch mixing 30-60 minute;
Compacting is suppressed 10-60 with mould and is made base substrate second under 650-750MPa;
Sintering is fired in special furnace, is 650-700 ℃ of pre-burning 2 hours in temperature at first, and then band heat is suppressed shaping under 150-200MPa pressure, at 1250-1350 ℃ of lower sintering 1-2 hour, cools to 450-480 ℃ again;
Boronising is put into boriding medium with base substrate and is carried out the boronising processing;
Quench, quench the base substrate after will processing through boronising is incubated 2 hours in 780-850 ℃ glowing furnace after, quench minute two stages, first stage is that constant temperature is quenched to 550-580 ℃; Quench rates is no more than 15 ℃/minute, and second stage is that nature quenches, be quenched to 130-150 ℃ after, enter annealing furnace;
Insulation was cooled to 130-150 after 2 hours in 550-600 ℃ of annealing furnace; Insulation is 3 hours after being tempered to 200-220 ℃ again, cooling.
Described boriding medium is 25% borax, 11% potassium fluoborate and the graphite of surplus by weight percentage.
Described quenching medium is the salt bath quenching agent that is comprised of by 1: 1 weight ratio potassium nitrate and sodium nitrate.
Embodiment 1
Described preparation method is:
Batching, be by weight percentage, 0.6% carbon, 0.3% silicon, 0.03% titanium, 0.04% boron, 0.015% chromium, 0.32% manganese, 0.02% molybdenum, 0.0001% cerium, surplus is that iron and inevitable impurity calculate batching; Described cerium is that to contain cerium be that the cerium-iron alloy mode of 10% percentage by weight adds;
Batch mixing, with the powder of said mixture after adding zinc stearate in batch mixer batch mixing 30 minutes;
Suppress, suppress under 650MPa with mould and make base substrate 30 seconds;
Sintering is fired in special furnace, is 650-700 ℃ of pre-burning 2 hours in temperature at first, and then band heat is suppressed shaping under 150MPa pressure, 1250-1350 ℃ of lower sintering 2 hours, cools to 450-480 ℃ again;
Boronising is put into boriding medium with base substrate and is carried out the boronising processing;
Quench, quench the base substrate after will processing through boronising is incubated 2 hours in 780-850 ℃ glowing furnace after, quench minute two stages, first stage is that constant temperature is quenched to 550-580 ℃; Quench rates is no more than 15 ℃/minute, and second stage is that nature quenches, be quenched to 130-150 ℃ after, enter annealing furnace;
Insulation was cooled to 130-150 after 2 hours in 550-600 ℃ of annealing furnace; Insulation is 3 hours after being tempered to 200-220 ℃ again, cooling.
Described boriding medium is 25% borax, 11% potassium fluoborate and the graphite of surplus by weight percentage.
Described quenching medium is the salt bath quenching agent that is comprised of by 1: 1 weight ratio potassium nitrate and sodium nitrate.
In following examples of the present invention, selected boriding medium is identical with quenching medium, just no longer carries out repeat specification.
Embodiment 2
Described preparation method is:
Batching, be by weight percentage, 1.2% carbon, 0.65% silicon, 0.035% titanium, 0.047% boron, 0.023% chromium, 0.35% manganese, 0.025% molybdenum, 0.0005% cerium, surplus is that iron and inevitable impurity calculate batching; Described cerium is that to contain cerium be that the cerium-iron alloy mode of 10% percentage by weight adds;
Batch mixing, with the powder of said mixture after adding zinc stearate in batch mixer batch mixing 60 minutes;
Suppress, suppress under 750MPa with mould and make base substrate 45 seconds;
Sintering is fired in special furnace, is 650-700 ℃ of pre-burning 2 hours in temperature at first, and then band heat is suppressed shaping under 200MPa pressure, 1250-1350 ℃ of lower sintering 2 hours, cools to 450-480 ℃ again;
Boronising is put into boriding medium with base substrate and is carried out the boronising processing;
Quench, quench the base substrate after will processing through boronising is incubated 2 hours in 780-850 ℃ glowing furnace after, quench minute two stages, first stage is that constant temperature is quenched to 550-580 ℃; Quench rates is no more than 15 ℃/minute, and second stage is that nature quenches, be quenched to 130-150 ℃ after, enter annealing furnace;
Insulation was cooled to 130-150 after 2 hours in 550-600 ℃ of annealing furnace; Insulation is 3 hours after being tempered to 200-220 ℃ again, cooling.
Embodiment 3
Described preparation method is:
Batching, be by weight percentage, the chromium of the titanium of the carbon of 0.6-1.2%, the silicon of 0.3-0.65%, 0.03-0.035%, the boron of 0.04-0.047%, 0.015-0.023%, the manganese of 0.32-0.35%, the molybdenum of 0.02-0.025%, the zinc of 0.3-0.5%, the cerium of 0.0001-0.0005%, surplus are that iron and inevitable impurity calculate batching; Described cerium is that to contain cerium be that the cerium-iron alloy mode of 10% percentage by weight adds;
Batch mixing, with the powder of said mixture after adding zinc stearate in batch mixer batch mixing 60 minutes;
Suppress, suppress under 700MPa with mould and make base substrate 60 seconds;
Sintering is fired in special furnace, is 650-700 ℃ of pre-burning 2 hours in temperature at first, and then band heat is suppressed shaping under 180MPa pressure, 1250-1350 ℃ of lower sintering 2 hours, cools to 450-480 ℃ again;
Boronising is put into boriding medium with base substrate and is carried out the boronising processing;
Quench, quench the base substrate after will processing through boronising is incubated 2 hours in 780-850 ℃ glowing furnace after, quench minute two stages, first stage is that constant temperature is quenched to 550-580 ℃; Quench rates is no more than 15 ℃/minute, and second stage is that nature quenches, be quenched to 130-150 ℃ after, enter annealing furnace;
Insulation was cooled to 130-150 after 2 hours in 550-600 ℃ of annealing furnace; Insulation is 3 hours after being tempered to 200-220 ℃ again, cooling.
Claims (8)
1. a cam follower pump rotor is characterized in that: include rotor body and the boride layer that is positioned on the rotor body.
2. cam follower pump rotor according to claim 1, it is characterized in that: the thickness of described boride layer is the 0.1-1.2 millimeter.
3. cam follower pump rotor according to claim 1, it is characterized in that: the composition of described rotor body, be by weight percentage, the chromium of the titanium of the carbon of 0.6-1.2%, the silicon of 0.3-0.65%, 0.03-0.035%, the boron of 0.04-0.047%, 0.015-0.023%, the manganese of 0.32-0.35%, the molybdenum of 0.02-0.025%, the cerium of 0.0001-0.0005%, surplus is iron and inevitable impurity.
4. cam follower pump rotor according to claim 3 is characterized in that: described cerium is that to contain cerium be that the cerium-iron alloy mode of 10% percentage by weight adds.
5. a cam follower pump rotor preparation method is it is characterized in that:
Batching, be by weight percentage, the chromium of the titanium of the carbon of 0.6-1.2%, the silicon of 0.3-0.65%, 0.03-0.035%, the boron of 0.04-0.047%, 0.015-0.023%, the manganese of 0.32-0.35%, the molybdenum of 0.02-0.025%, the cerium of 0.0001-0.0005%, surplus are that iron and inevitable impurity calculate batching;
Batch mixing was with the powder of said mixture after adding zinc stearate in batch mixer batch mixing 30-60 minute;
Compacting is suppressed 10-60 with mould and is made base substrate second under 650-750MPa;
Sintering is fired in special furnace, is 650-700 ℃ of pre-burning 2 hours in temperature at first, and then band heat is suppressed shaping under 150-200MPa pressure, at 1250-1350 ℃ of lower sintering 1-2 hour, cools to 450-480 ℃ again;
Boronising is put into boriding medium with base substrate and is carried out the boronising processing;
Quench, quench the base substrate after will processing through boronising is incubated 2 hours in 780-850 ℃ glowing furnace after, quench minute two stages, first stage is that constant temperature is quenched to 550-580 ℃; Quench rates is no more than 15 ℃/minute, and second stage is that nature quenches, be quenched to 130-150 ℃ after, enter annealing furnace;
Insulation was cooled to 130-150 after 2 hours in 550-600 ℃ of annealing furnace; Insulation is 3 hours after being tempered to 200-220 ℃ again, cooling.
6. lobed rotor pump rotor material preparation method according to claim 5 is characterized in that: described cerium is that to contain cerium be that the cerium-iron alloy mode of 10% percentage by weight adds.
7. lobed rotor pump rotor material preparation method according to claim 5 is characterized in that: described boriding medium is 25% borax, 11% potassium fluoborate and the graphite of surplus by weight percentage.
8. lobed rotor pump rotor material preparation method according to claim 5 is characterized in that: the salt bath quenching agent of described quenching medium for being comprised of by 1: 1 weight ratio potassium nitrate and sodium nitrate.
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| CN2012104905583A CN102990067A (en) | 2012-11-22 | 2012-11-22 | Rotor of cam rotor pump and preparation method thereof |
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| CN2012104905583A CN102990067A (en) | 2012-11-22 | 2012-11-22 | Rotor of cam rotor pump and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01294843A (en) * | 1988-05-20 | 1989-11-28 | Taihei Kinzoku Kogyo Kk | Coating alloy having wear resistance and corrosion resistance and material for forming the same |
| CN2120173U (en) * | 1992-03-30 | 1992-10-28 | 河南省石油勘探局机械制造厂 | Boriding cylinder casing for mud pump |
| CN1288973A (en) * | 2000-09-26 | 2001-03-28 | 上海林沪实业有限公司 | High-hardness wear-resisting low-carbon alloy steel plate |
| CN102205416A (en) * | 2011-05-19 | 2011-10-05 | 东睦新材料集团股份有限公司 | Manufacture method of engine tappet |
| CN102978522A (en) * | 2012-11-22 | 2013-03-20 | 宁波得利时泵业有限公司 | Cam rotor pump rotor material and preparation method |
| CN102994887A (en) * | 2012-11-22 | 2013-03-27 | 宁波得利时泵业有限公司 | Preparation method of rotor material of cam rotor pump |
-
2012
- 2012-11-22 CN CN2012104905583A patent/CN102990067A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01294843A (en) * | 1988-05-20 | 1989-11-28 | Taihei Kinzoku Kogyo Kk | Coating alloy having wear resistance and corrosion resistance and material for forming the same |
| CN2120173U (en) * | 1992-03-30 | 1992-10-28 | 河南省石油勘探局机械制造厂 | Boriding cylinder casing for mud pump |
| CN1288973A (en) * | 2000-09-26 | 2001-03-28 | 上海林沪实业有限公司 | High-hardness wear-resisting low-carbon alloy steel plate |
| CN102205416A (en) * | 2011-05-19 | 2011-10-05 | 东睦新材料集团股份有限公司 | Manufacture method of engine tappet |
| CN102978522A (en) * | 2012-11-22 | 2013-03-20 | 宁波得利时泵业有限公司 | Cam rotor pump rotor material and preparation method |
| CN102994887A (en) * | 2012-11-22 | 2013-03-27 | 宁波得利时泵业有限公司 | Preparation method of rotor material of cam rotor pump |
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Application publication date: 20130327 |