CN103934454A - Manufacturing technology for small gasoline engine connecting rod workblank - Google Patents
Manufacturing technology for small gasoline engine connecting rod workblank Download PDFInfo
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- CN103934454A CN103934454A CN201410202782.7A CN201410202782A CN103934454A CN 103934454 A CN103934454 A CN 103934454A CN 201410202782 A CN201410202782 A CN 201410202782A CN 103934454 A CN103934454 A CN 103934454A
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- connecting rod
- cast steel
- gasoline engine
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- 238000005516 engineering process Methods 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 23
- 238000005245 sintering Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 67
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 24
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 16
- 239000012752 auxiliary agent Substances 0.000 claims description 14
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 13
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 13
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 13
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 12
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 12
- 229910002113 barium titanate Inorganic materials 0.000 claims description 12
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000012467 final product Substances 0.000 claims description 8
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 239000011572 manganese Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 229940126062 Compound A Drugs 0.000 claims description 4
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000004663 powder metallurgy Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910017083 AlN Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Forging (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention belongs to the technical field of alloy material machining, and discloses a manufacturing technology for a small gasoline engine connecting rod workblank. The manufacturing technology comprises the following steps of material preparation, accessory ingredient preparation, thermal reactions, secondary material mixing and sintering. The manufacturing technology for the small gasoline engine connecting rod workblank has the advantages of being simple, low in energy consumption, high in product performance and the like, and the defects in the prior art are overcome.
Description
Technical field
The present invention relates to a kind of preparation technology of miniature gasoline engine connecting rod blank, belong to alloy material processing technique field.
Background technology
Along with the development of China's metallurgical technology, powder metallurgy structure purposes is more and more wider.Powder metallurgy is as a kind of near-net-shape technology, in the time of the part that the batches such as production structure part are large, dimensional accuracy is high, processing charges are high, there are very large economic advantages, have at present some automobile production producers to attempt this technology to be applied in the preparation of gasoline engine connecting rod blank.But, utilize gasoline engine bar linkage structure part prepared by powder metallurgy to have a weakness: product compact strength before sintering is not very low, cause the product after moulding easily to occur crackle, and cannot in manufacture process, reality use, to automobile gasoline machine connecting rod, manufacture is fatal defect for this, caused powder metallurgy structural part can only be applied on medium to low-risk stressed member, the scope of application is limited by very large.
Automobile connecting bar is the important spare part of automobile engine, and along with the high speed development of automobile industry, the volume of production and marketing speedup of connecting rod is obvious.Connecting rod is bearing very high periodic shock power, inertia force and bending force in the course of the work, and its quality directly has influence on the performance of engine.At present, high-performance enginer proposes higher requirement to connecting rod, and intensity, rigidity want high, and will have higher toughness, degree of purity and fatigue behaviour.In prior art, existing connecting rod blank material exists energy consumption higher mostly, complex process, and also the performance of connecting rod blank does not reach the demand of growing Engine Industry.Therefore, we need to develop, and a kind of technique is simple, and energy consumption is low, the preparation technology of the miniature gasoline engine connecting rod blank that properties of product are high.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, and a kind of preparation technology of miniature gasoline engine connecting rod blank is provided.
The present invention is achieved by the following technical solutions:
A preparation technology for miniature gasoline engine connecting rod blank, it comprises the following steps: batching, auxiliary agent preparation, thermal response, rerolling and sintering; Specifically comprise the steps:
Batching: get following raw material according to weight portion, wherein, cast steel powder 150-200 part, manganese powder 10-15 part, copper powder 5-10 part, chromium powder 3-5 part, cobalt powder 2-3 part, molybdenum powder 2-3 part, carborundum powder 2-3 part, aluminum nitride powder 2-3 part, barium titanate powder 1-2 part, zinc stearate 0.2-0.3 part, calcirm-fluoride 0.2-0.3 part, methyl methacrylate 0.1-0.2 part, silica white 0.1-0.2 part;
Auxiliary agent preparation: the zinc stearate of step 1) and calcirm-fluoride are mixed, add the water with quality such as mixtures, the speed of 500 revs/min stirs 10 minutes, add methyl methacrylate, the temperature that then slowly raises is as for 70 DEG C, and constant temperature stirs 30 minutes, mixing speed is 1000 revs/min, finally dry, grind into powder more than 800 orders, to obtain final product;
Thermal response: by cast steel powder, manganese powder in step 1), copper powder, chromium powder, cobalt powder, molybdenum powder, carborundum powder, aluminum nitride powder and barium titanate powder, add in reactor, stirs, then add step 2) auxiliary agent prepared, be heated to 300-350 DEG C, heat while stirring, mixing speed is 1000 revs/min, after 10 minutes, stop stirring and obtain compound A;
Rerolling: when the temperature of thing A to be composite is reduced to 30 DEG C, then add the silica white in step 1) in reactor, stir, obtain compound B;
Sintering: by compound B take out, under 8-10Mpa pressure, be pressed into bulk, then under nitrogen protection atmosphere 800-900 DEG C carry out sintering 3-5 hour, be then cooled to room temperature and get final product.
Preferably,
In above-mentioned cast steel powder, the mass fraction of each component is as follows: C:0.9-1.1%, and Mn:0.8-1.0%, Si:0.4-0.6%, surplus is Fe;
Above-mentioned cast steel powder, manganese powder, copper powder, chromium powder, cobalt powder, molybdenum powder, carborundum powder, aluminum nitride powder, more than the particle diameter of barium titanate powder and silica white is all controlled at 500 orders.
The beneficial effect that the present invention obtains mainly comprises the following aspects:
Blank prepared by the present invention, by the auxiliary agent adding, makes the uniformity in length and breadth of interiors of products institutional framework, and alloy powder is uniformly dispersed; This auxiliary agent provides superfines in mixed material, can be filled between the larger oarse-grained gap of metal, from high apparent density, improved the wear-resisting and anti-fatigue performance of product simultaneously; The present invention selects various metals and nonmetal raw material by orthogonal test repeatedly, and proportioning is more reasonable, and mechanical performance in every respect all shows good performance, is applicable to make the metalwork that miniature gasoline engine connecting rod and other mechanical performances are had relatively high expectations; The present invention adds a certain proportion of silica gel, together with its special molecular structure can closely be fitted to each raw material with aperture; The present invention selects and adds appropriate methyl methacrylate, cobalt powder and manganese powder, can greatly improve wearability; And select the appropriate carborundum of interpolation and aluminium nitride to be used for substituting the content of other heavy metals, reduced the utilization of heavy metal; Preparation technology's simple possible of the present invention, can large-scale industrial production, possesses good market application foreground.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further detailed explanation, but should not regard the restriction to initiative spirit of the present invention as.
Embodiment 1
A preparation technology for miniature gasoline engine connecting rod blank, it comprises the following steps: batching, auxiliary agent preparation, thermal response, rerolling and sintering; Specifically comprise the steps:
1) batching: get following raw material according to weight portion, wherein, 150 parts, cast steel powder, 10 parts of manganese powders, 5 parts of copper powders, 3 parts of chromium powders, 2 parts of cobalt powders, 2 parts of molybdenum powders, 2 parts of carborundum powders, 2 parts of aluminum nitride powders, 1 part of barium titanate powder, 0.2 part of zinc stearate, 0.2 part, calcirm-fluoride, 0.1 part of methyl methacrylate, 0.1 part of silica white; In above-mentioned cast steel powder, the mass fraction of each component is as follows: C:0.9-1.1%, and Mn:0.8-1.0%, Si:0.4-0.6%, surplus is Fe; Above-mentioned cast steel powder, manganese powder, copper powder, chromium powder, cobalt powder, molybdenum powder, carborundum powder, aluminum nitride powder, the particle diameter of barium titanate powder and silica white is all controlled at 600 orders;
2) auxiliary agent preparation: the zinc stearate of step 1) and calcirm-fluoride are mixed, the water of quality such as then add, the speed of 500 revs/min stirs 10 minutes, add the methyl methacrylate in step 1), the temperature to 70 DEG C that then slowly raises, constant temperature stirs 30 minutes, mixing speed is 1000 revs/min, finally dry, grind into 900 object powder, to obtain final product;
3) thermal response: by cast steel powder, manganese powder in step 1), copper powder, chromium powder, cobalt powder, molybdenum powder, carborundum powder, aluminum nitride powder and barium titanate powder, add in reactor, stirs, then add step 2) auxiliary agent prepared, be heated to 300 DEG C, heat while stirring, mixing speed is 1000 revs/min, after 10 minutes, stop stirring and obtain compound A;
4) rerolling: when the temperature of thing A to be composite is reduced to 30 DEG C, then, toward the silica white that adds step 1) in reactor, stir, obtain compound B;
5) sintering: by compound B take out, under 8Mpa pressure, be pressed into bulk, then under nitrogen protection atmosphere 800 DEG C carry out sintering 5 hours, be then cooled to room temperature and get final product.
Gasoline engine connecting rod blank performance test prepared by above-mentioned technique:
Product density: 7.68 g/cm
3
Ultimate tensile strength intensity (MPa): 972
Bending strength (MPa): 1901
Percentage elongation (%): 36.0
Ballistic work (J): 63
Yield strength (MPa): 617.
Embodiment 2
A preparation technology for miniature gasoline engine connecting rod blank, it comprises the following steps: batching, auxiliary agent preparation, thermal response, rerolling and sintering; Specifically comprise the steps:
1) batching: get following raw material according to weight portion, wherein, 200 parts, cast steel powder, 15 parts of manganese powders, 10 parts of copper powders, 5 parts of chromium powders, 3 parts of cobalt powders, 3 parts of molybdenum powders, 3 parts of carborundum powders, 3 parts of aluminum nitride powders, 2 parts of barium titanate powders, 0.3 part of zinc stearate, 0.3 part, calcirm-fluoride, 0.2 part of methyl methacrylate, 0.2 part of silica white; In above-mentioned cast steel powder, the mass fraction of each component is as follows: C:0.9-1.1%, and Mn:0.8-1.0%, Si:0.4-0.6%, surplus is Fe; Above-mentioned cast steel powder, manganese powder, copper powder, chromium powder, cobalt powder, molybdenum powder, carborundum powder, aluminum nitride powder, the particle diameter of barium titanate powder and silica white is all controlled at 700 orders;
2) auxiliary agent preparation: the zinc stearate of step 1) and calcirm-fluoride are mixed, add the water with quality such as mixtures, the speed of 500 revs/min stirs 10 minutes, add methyl methacrylate, the temperature that then slowly raises is as for 70 DEG C, and constant temperature stirs 30 minutes, mixing speed is 1000 revs/min, finally dry, grind into 1000 object powder, to obtain final product;
3) thermal response: by cast steel powder, manganese powder in step 1), copper powder, chromium powder, cobalt powder, molybdenum powder, carborundum powder, aluminum nitride powder and barium titanate powder, add in reactor, stirs, then add step 2) auxiliary agent prepared, be heated to 350 DEG C, heat while stirring, mixing speed is 1000 revs/min, after 10 minutes, stop stirring and obtain compound A;
4) rerolling: when the temperature of thing A to be composite is reduced to 30 DEG C, then add the silica white in step 1) in reactor, stir, obtain compound B;
5) sintering: by compound B take out, under 10Mpa pressure, be pressed into bulk, then under nitrogen protection atmosphere 900 DEG C carry out sintering 3 hours, be then cooled to room temperature and get final product.
Gasoline engine connecting rod blank performance test prepared by above-mentioned technique:
Product density: 7.72 g/cm
3
Ultimate tensile strength intensity (MPa): 965
Bending strength (MPa): 1946
Percentage elongation (%): 35.3
Ballistic work (J): 67
Yield strength (MPa): 634.
Finally, it is also to be noted that, what more than enumerate is only several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, can also have many distortion.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Claims (4)
1. a preparation technology for miniature gasoline engine connecting rod blank, comprises the following steps: 1) batching, 2) auxiliary agent preparation, 3) thermal response, 4) rerolling and 4) sintering.
2. preparation technology as claimed in claim 1, is characterized in that,
1) batching: get following raw material according to weight portion, wherein, cast steel powder 150-200 part, manganese powder 10-15 part, copper powder 5-10 part, chromium powder 3-5 part, cobalt powder 2-3 part, molybdenum powder 2-3 part, carborundum powder 2-3 part, aluminum nitride powder 2-3 part, barium titanate powder 1-2 part, zinc stearate 0.2-0.3 part, calcirm-fluoride 0.2-0.3 part, methyl methacrylate 0.1-0.2 part, silica white 0.1-0.2 part;
2) auxiliary agent preparation: the zinc stearate of step 1) and calcirm-fluoride are mixed, add the water with quality such as mixtures, the speed of 500 revs/min stirs 10 minutes, add methyl methacrylate, the temperature to 70 DEG C that then slowly raises, constant temperature stirs 30 minutes, mixing speed is 1000 revs/min, finally dry, grind into powder more than 800 orders, to obtain final product;
3) thermal response: by cast steel powder, manganese powder in step 1), copper powder, chromium powder, cobalt powder, molybdenum powder, carborundum powder, aluminum nitride powder and barium titanate powder, add in reactor, stirs, then add step 2) auxiliary agent prepared, be heated to 300-350 DEG C, heat while stirring, mixing speed is 1000 revs/min, after 10 minutes, stop stirring and obtain compound A;
4) rerolling: when the temperature of thing A to be composite is reduced to 30 DEG C, then add the silica white in step 1) in reactor, stir, obtain compound B;
5) sintering: by compound B take out, under 8-10Mpa pressure, be pressed into bulk, then under nitrogen protection atmosphere 800-900 DEG C carry out sintering 3-5 hour, be then cooled to room temperature and get final product.
3. preparation technology as claimed in claim 2, is characterized in that, in described cast steel powder, the mass fraction of each component is as follows: C:0.9-1.1%, and Mn:0.8-1.0%, Si:0.4-0.6%, surplus is Fe.
4. preparation technology as claimed in claim 2 or claim 3, is characterized in that, described cast steel powder, and manganese powder, copper powder, chromium powder, cobalt powder, molybdenum powder, carborundum powder, aluminum nitride powder, more than the particle diameter of barium titanate powder and silica white is all controlled at 500 orders.
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| CN201410202782.7A CN103934454B (en) | 2014-05-14 | 2014-05-14 | A kind of preparation technology of miniature gasoline engine connecting rod blank |
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| CN201410202782.7A CN103934454B (en) | 2014-05-14 | 2014-05-14 | A kind of preparation technology of miniature gasoline engine connecting rod blank |
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Cited By (5)
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| CN105251982A (en) * | 2015-10-21 | 2016-01-20 | 马聪 | Anti-corrosion ferrum-based powder metallurgy forging automobile connecting rod and preparation method thereof |
| CN105251981A (en) * | 2015-10-21 | 2016-01-20 | 马聪 | Anti-corrosion ferrum-based powder metallurgy forging automobile connecting rod and preparation method thereof |
| CN105328194A (en) * | 2015-10-21 | 2016-02-17 | 马聪 | High-tensile-strength ferrum-based powder metallurgy forging automobile connecting rod and manufacturing method thereof |
| CN105328198A (en) * | 2015-10-21 | 2016-02-17 | 李学峰 | High-compactness ferrum-based powder metallurgy forging automobile connecting rod and manufacturing method thereof |
| CN112974807A (en) * | 2019-12-16 | 2021-06-18 | 江苏派欧汽车零部件有限公司 | Machining process for automobile connecting rod blank |
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| CN105328198A (en) * | 2015-10-21 | 2016-02-17 | 李学峰 | High-compactness ferrum-based powder metallurgy forging automobile connecting rod and manufacturing method thereof |
| CN112974807A (en) * | 2019-12-16 | 2021-06-18 | 江苏派欧汽车零部件有限公司 | Machining process for automobile connecting rod blank |
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| Publication number | Publication date |
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| CN103934454B (en) | 2015-12-09 |
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Denomination of invention: Preparation process of connecting rod blank of small gasoline engine Effective date of registration: 20211014 Granted publication date: 20151209 Pledgee: Linshang Bank Co.,Ltd. Kaiyuan sub branch Pledgor: LINYI JINLI MACHINERY Co.,Ltd. Registration number: Y2021980010714 |