CN105478779A - Method for preparing engine crankshaft connecting rod bypowder metallurgyprocess - Google Patents
Method for preparing engine crankshaft connecting rod bypowder metallurgyprocess Download PDFInfo
- Publication number
- CN105478779A CN105478779A CN201510825840.6A CN201510825840A CN105478779A CN 105478779 A CN105478779 A CN 105478779A CN 201510825840 A CN201510825840 A CN 201510825840A CN 105478779 A CN105478779 A CN 105478779A
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- Prior art keywords
- parts
- phase
- carbide
- connecting rod
- engine crankshaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a method for preparing an engine crankshaft connecting rod bya powder metallurgyprocess. The method comprises the following processing steps: 1) preparing raw materials: the raw materials comprise the following compositions in parts by weight: 7-9 parts of a hard phase, 10-12 parts of a bonding phase, 2-4 parts of an inhibiting phase, 40-42 parts of an alloy phase, and 1.5-2.5 parts of a lubricant, wherein the inhibiting phase comprises the following raw materials in percent by mass: 7-9 percent of VC, 10-12 percent of SiC, 14-16 percent of titanium dioxide, 10-15 percent of graphene, and the balance zirconium dioxide; and 2) placing the raw materials in a high-speed stirring machine to be stirred at a high speed. The method has the advantages that metal consumption can be reduced greatly, the cost of the engine crankshaft connecting rod is reduced, and the composition proportioning correctness and the composition proportioning uniformity of the materials can be ensured.
Description
Technical field
The present invention relates to field of powder metallurgy, specifically belong to a kind of engine crankshaft connecting rod powder metallurgical preparation method.
Background technology
Powder metallurgy be produce metal or with metal dust (or mixture of metal dust and non-metal powder) as raw material, through being shaped and sintering, manufacture the technology of metal material, composite and all kinds goods.Powder metallurgic method has similar place to production pottery, and therefore, a series of New Technologies In Powder Metallu Rgy also can be used for the preparation of ceramic material.Due to the advantage of PM technique, it has become the key solving new material problem, plays a part very important in the development of new material.At present, PM technique has been widely used in the fields such as traffic, machinery, electronics, Aero-Space, weapons, biology, new forms of energy, information and nuclear industry, becomes one of branch of most development vitality in new material science.PM technique possess significantly energy-conservation, economize the high and series of advantages such as good stability of material, excellent performance, Product Precision, be very suitable for producing in enormous quantities.In addition, the material that part conventional casting methods and machining process cannot be prepared and complex parts also available powders metallurgical technology manufacture, thus enjoy the attention of industrial quarters.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind ofly reduce product cost, stability is strong, torsional resistance is good engine crankshaft connecting rod powder metallurgical preparation method.
Technical scheme of the present invention is as follows:
A kind of engine crankshaft connecting rod powder metallurgical preparation method, includes following processing step:
1), raw material components forming by following weight portion: 7-9 part hard phase, the bonding phase of 10-12 part, 2-4 part suppress phase, 40-42 part alloy phase, 1.5-2.5 part lubricant to form, described suppression is made up of the raw material of following mass percent mutually: 7-9%VC, 10-12%SiC, 14-16% titanium dioxide, 10-15% Graphene, surplus is zirconium dioxide, above-mentioned raw materials is put into homogenizer high speed and stirs;
2), stir after carry out pressing step, sintering step, in sintering step in sintering furnace sinter 1.5 ~ 2.5h, sintering furnace temperature 1150 DEG C ~ 1200 DEG C, the crankshaft-link rod blank after sintering is put into quartz sand and is naturally cooled;
3), surperficial Atmosphere controlling heat-treatment, Carburization Treatment are carried out respectively in cooled crankshaft-link rod surface: Atmosphere controlling heat-treatment passes into mist in heat treated stove, nitrogen intake is at 120 ~ 150ml/min, ethanol intake is at 60 ~ 64ml/min, propane intake, at 14 ~ 16ml/min, keeps furnace gas atmosphere composition weight portion scope control at nitrogen content 45 ~ 48 parts, helium content 25 ~ 28 parts, carbon dioxide content 16 ~ 18 parts; Then put into carburizer carburizing, carburizing temperature 800 ~ 840 DEG C, 15 ~ 18 hours time, cool with stove after carburizing.
Described hard phase is made up of the raw material of following mass percent: 5-7% niobium nitride, 2.5-3.5% molybdenum carbide, 1.5-2.2% titanium carbide, 0.4-0.8% vanadium carbide, 0.24-0.36% tungsten carbide, and surplus is silicon boride.
Described hard phase is made up of the raw material of following mass percent: 6% niobium nitride, 3% molybdenum carbide, 1.8% titanium carbide, 0.6% vanadium carbide, 0.3% tungsten carbide, and surplus is silicon boride.
Beneficial effect of the present invention:
1, because powder metallurgy process can be pressed into the pressed compact of final size, and do not need or seldom need machining subsequently, therefore greatly can save metal, reduce product cost.When manufacturing a product with powder metallurgy process, the loss of metal only has 1-5%, and when producing with general casting method, the loss of metal may reach 80%; 2, due to powder metallurgical technique not molten material in Material Manufacturing Process, also be not just afraid of the impurity being mixed into and being brought by crucible and deoxidier etc., and sintering generally carries out in vacuum and reducing atmosphere, is not afraid of oxidation, also any pollution of material can not be given, therefore the material of likely high-purity; 3, powder metallurgic method can ensure correctness and the uniformity of material composition proportioning.
Detailed description of the invention
Below in conjunction with specific embodiment, illustrate the present invention further, these embodiments should be understood only for illustration of the present invention
A kind of engine crankshaft connecting rod powder metallurgical preparation method, includes following processing step:
1), raw material components forming by following weight portion: 7-9 part hard phase, the bonding phase of 10-12 part, 2-4 part suppress phase, 40-42 part alloy phase, 1.5-2.5 part lubricant to form, described suppression is made up of the raw material of following mass percent mutually: 7-9%VC, 10-12%SiC, 14-16% titanium dioxide, 10-15% Graphene, surplus is zirconium dioxide, above-mentioned raw materials is put into homogenizer high speed and stirs;
2), stir after carry out pressing step, sintering step, in sintering step in sintering furnace sinter 1.5 ~ 2.5h, sintering furnace temperature 1150 DEG C ~ 1200 DEG C, the crankshaft-link rod blank after sintering is put into quartz sand and is naturally cooled;
3), surperficial Atmosphere controlling heat-treatment, Carburization Treatment are carried out respectively in cooled crankshaft-link rod surface: Atmosphere controlling heat-treatment passes into mist in heat treated stove, nitrogen intake is at 120 ~ 150ml/min, ethanol intake is at 60 ~ 64ml/min, propane intake, at 14 ~ 16ml/min, keeps furnace gas atmosphere composition weight portion scope control at nitrogen content 45 ~ 48 parts, helium content 25 ~ 28 parts, carbon dioxide content 16 ~ 18 parts; Then put into carburizer carburizing, carburizing temperature 800 ~ 840 DEG C, 15 ~ 18 hours time, cool with stove after carburizing.
Described hard phase is made up of the raw material of following mass percent: 6% niobium nitride, 3% molybdenum carbide, 1.8% titanium carbide, 0.6% vanadium carbide, 0.3% tungsten carbide, and surplus is silicon boride.
Crankshaft-link rod prepared by the powder metallurgy process produced according to the present invention, experimental data is as follows:
Tensile strength sigma b (MPa):>=920, yield strength σ s (MPa):>=840, percentage elongation δ 5 (%):>=11.4, contraction percentage of area ψ (%):>=46.2, Impact energy Ak v (J):>=55, notched bar impact strength α kv (J/cm
2):>=62.5.
Claims (3)
1. an engine crankshaft connecting rod powder metallurgical preparation method, is characterized in that: include following processing step:
1), raw material components forming by following weight portion: 7-9 part hard phase, the bonding phase of 10-12 part, 2-4 part suppress phase, 40-42 part alloy phase, 1.5-2.5 part lubricant to form, described suppression is made up of the raw material of following mass percent mutually: 7-9%VC, 10-12%SiC, 14-16% titanium dioxide, 10-15% Graphene, surplus is zirconium dioxide, above-mentioned raw materials is put into homogenizer high speed and stirs;
2), stir after carry out pressing step, sintering step, in sintering step in sintering furnace sinter 1.5 ~ 2.5h, sintering furnace temperature 1150 DEG C ~ 1200 DEG C, the crankshaft-link rod blank after sintering is put into quartz sand and is naturally cooled;
3), surperficial Atmosphere controlling heat-treatment, Carburization Treatment are carried out respectively in cooled crankshaft-link rod surface: Atmosphere controlling heat-treatment passes into mist in heat treated stove, nitrogen intake is at 120 ~ 150ml/min, ethanol intake is at 60 ~ 64ml/min, propane intake, at 14 ~ 16ml/min, keeps furnace gas atmosphere composition weight portion scope control at nitrogen content 45 ~ 48 parts, helium content 25 ~ 28 parts, carbon dioxide content 16 ~ 18 parts; Then put into carburizer carburizing, carburizing temperature 800 ~ 840 DEG C, 15 ~ 18 hours time, cool with stove after carburizing.
2. engine crankshaft connecting rod powder metallurgical preparation method according to claim 1, is characterized in that:
Described hard phase is made up of the raw material of following mass percent: 5-7% niobium nitride, 2.5-3.5% molybdenum carbide, 1.5-2.2% titanium carbide, 0.4-0.8% vanadium carbide, 0.24-0.36% tungsten carbide, and surplus is silicon boride.
3. powder metallurgy cast steel support roller according to claim 2, it is characterized in that: described hard phase is made up of the raw material of following mass percent: 6% niobium nitride, 3% molybdenum carbide, 1.8% titanium carbide, 0.6% vanadium carbide, 0.3% tungsten carbide, surplus is silicon boride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510825840.6A CN105478779A (en) | 2015-11-25 | 2015-11-25 | Method for preparing engine crankshaft connecting rod bypowder metallurgyprocess |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510825840.6A CN105478779A (en) | 2015-11-25 | 2015-11-25 | Method for preparing engine crankshaft connecting rod bypowder metallurgyprocess |
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| CN105478779A true CN105478779A (en) | 2016-04-13 |
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| CN201510825840.6A Pending CN105478779A (en) | 2015-11-25 | 2015-11-25 | Method for preparing engine crankshaft connecting rod bypowder metallurgyprocess |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115555565A (en) * | 2022-09-23 | 2023-01-03 | 河源市蓝海米克模具刀具有限公司 | Novel material alloy cutter and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168190A (en) * | 2007-10-11 | 2008-04-30 | 丁家伟 | Hard alloy and double-metal composite technique and device |
| CN102703908A (en) * | 2012-01-17 | 2012-10-03 | 苏州新锐工程工具有限公司 | Heat treatment method of impact piston |
| CN103537672A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automobile engine connecting rod and manufacturing method thereof |
| CN103537679A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automobile connecting rod and preparing method of powder metallurgy automobile connecting rod |
| CN104084589A (en) * | 2014-06-06 | 2014-10-08 | 马鞍山市恒毅机械制造有限公司 | Powder metallurgical automobile hub bearing unit |
-
2015
- 2015-11-25 CN CN201510825840.6A patent/CN105478779A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168190A (en) * | 2007-10-11 | 2008-04-30 | 丁家伟 | Hard alloy and double-metal composite technique and device |
| CN102703908A (en) * | 2012-01-17 | 2012-10-03 | 苏州新锐工程工具有限公司 | Heat treatment method of impact piston |
| CN103537672A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automobile engine connecting rod and manufacturing method thereof |
| CN103537679A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automobile connecting rod and preparing method of powder metallurgy automobile connecting rod |
| CN104084589A (en) * | 2014-06-06 | 2014-10-08 | 马鞍山市恒毅机械制造有限公司 | Powder metallurgical automobile hub bearing unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115555565A (en) * | 2022-09-23 | 2023-01-03 | 河源市蓝海米克模具刀具有限公司 | Novel material alloy cutter and preparation method thereof |
| CN115555565B (en) * | 2022-09-23 | 2023-12-01 | 河源市蓝海米克模具刀具有限公司 | Alloy cutter and preparation method thereof |
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Application publication date: 20160413 |