CN107243616A - A kind of IC engine link rod liquid forging preparation technology - Google Patents
A kind of IC engine link rod liquid forging preparation technology Download PDFInfo
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- CN107243616A CN107243616A CN201710487219.2A CN201710487219A CN107243616A CN 107243616 A CN107243616 A CN 107243616A CN 201710487219 A CN201710487219 A CN 201710487219A CN 107243616 A CN107243616 A CN 107243616A
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- pressure
- matched moulds
- sand box
- preparation technology
- liquid forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a kind of IC engine link rod liquid forging preparation technology, its key step is：1) 720~730 DEG C of aluminium copper liquation is cast in casting sand box, the time stood in a mold is 5~10s；2) control hydraulic press carries out matched moulds pressure forming, matched moulds pressure speed is 35~45cm/s, and matched moulds pressure pressure is 580~620bar, and the matched moulds pressure forming time is 20~25s, nitrogen charging pressurization is carried out in matched moulds course of exerting pressure, nitrogen charging pressure is 0.5~0.7Mpa；The present invention uses liquid forging process, it is possible to increase connecting rod metallographic structure intensity, compared with common process, and mechanical property adds more than 30%, and product qualification rate reaches that 99.8%, HB hardness reaches 130 150；Yield strength reaches 390MPa or so；Tensile strength reaches 360MPa or so；With it is not easy to crack, be not easily broken, the advantages of service life is long.
Description
Technical field
The invention belongs to the technical field containing antigen or the pharmaceutical product of antibody, it is specifically related to a kind of internal combustion engine and connects
Bar liquid forging preparation technology.
Background technology
At present, aluminium and aluminium alloy are the metal materials for being only second to steel, are widely used in building, the energy, transport, aviation boat
The field such as it, the application and research of aluminum and aluminum alloy mateial have also obtained fast development, and various aluminium alloys are widely used；
Linkage on other engine plays very important effect in power transmission；Connecting rod needs to do repeatedly continuous reciprocal
Move and larger power transmission, be made, because material proportion is big, caused of forged steel metal or alloy material more than existing connecting rod
The total quality of engine is heavier, and connecting rod strength is low, difference of hardness is easy to ftracture, fractureed, and how to design a kind of sturdy and durable, close
Degree is high, intensity is high, and high temperature resistant is corrosion-resistant, the suitable new aluminum copper alloy material of weight, the direction studied as everybody.
The content of the invention
In view of this, it is an object of the invention to provide a kind of IC engine link rod liquid forging preparation technology, in the one kind
Combustion engine connecting rod liquid forging preparation technology uses liquid forging process, it is possible to increase connecting rod metallographic structure intensity, with common process
Compare, mechanical property adds more than 30%, and product qualification rate reaches that 99.8%, HB hardness reaches 130-150；Yield strength reaches
Arrive 390MPa or so；Tensile strength reaches 360MPa or so；With it is not easy to crack, be not easily broken, the advantages of service life is long.
In order to achieve the above object, a kind of IC engine link rod liquid forging preparation technology of the invention, its step is：
1) before each casting of molten metal, aerosol is sprayed to convex-concave mould surface progress high-pressure wash by spray gun, and
It is intended to apply one layer of lubricant in convex-concave mould surface；
2) 720~730 DEG C of aluminium copper liquation is cast in casting sand box by sprue gate, liquation is poured into after mould
To hydraulic press pressurization；The time stood in a mold is 5~10s；
3) control hydraulic press carries out matched moulds pressure forming to aluminium copper liquid in casting sand box, and matched moulds pressure speed is 35
~45cm/s, matched moulds pressure pressure is 580~620bar, and the matched moulds pressure forming time is 20~25s, in matched moulds course of exerting pressure
Nitrogen charging pressurization is carried out to gap between punch-die in casting sand box, nitrogen charging pressure is 0.5~0.7Mpa；
4) after the completion of matched moulds pressure forming, the product of shaping stings tight core due to solidification shrinkage；Stay in cavity plate then
Workpiece is ejected by top plate push rod, connecting rod casting is taken out, allows its natural cooling.
Further, in step 3) in, matched moulds pressure speed is 40cm/s, and matched moulds pressure pressure is 600bar, matched moulds pressure
Curring time is 23s, and nitrogen charging pressurization, nitrogen charging pressure are carried out to gap between punch-die in casting sand box in matched moulds course of exerting pressure
For 0.6Mpa.
Further, in step 3) in, before matched moulds pressing formation, mold temperature is 140~170 in preheating casting sand box
℃。
Further, in step 2) in, the aluminium copper is prepared from by each component of following percentage by weight：Silicon
13.5-14.75%, copper 2.0-4.0%, iron 0.5-1.05%, manganese 0.1-0.35%, magnesium 0.25-0.35%, zinc 2.0-3.0%,
Nickel 0.1-0.5%, chromium 0.05-0.15%, tin 0.06-0.10%, titanium 0.01-0.15%, bismuth 0.02-0.05%, beryllium 0.001-
0.02%, lithium 0.001-0.003%, surplus is aluminium.
The beneficial effects of the present invention are：
A kind of IC engine link rod liquid forging preparation technology of the present invention uses liquid forging process, it is possible to increase connecting rod metallographic
Tissue intensity, compared with common process, mechanical property adds more than 30%, and product qualification rate reaches that 99.8%, HB hardness reaches
To 130-150；Yield strength reaches 390MPa or so；Tensile strength reaches 360MPa or so；With not easy to crack, not easy to break
It is disconnected, the advantages of service life is long.
Brief description of the drawings：
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carried out
Explanation：
Fig. 1 is the image of connecting rod pin hole prepared by inventive combustion engine connecting rod liquid forging preparation technology；
Fig. 2 is that the level Four of the pin hole of connecting rod prepared by inventive combustion engine connecting rod liquid forging preparation technology compares figure；
Fig. 3 is connecting rod grain size image prepared by inventive combustion engine connecting rod liquid forging preparation technology；
Fig. 4 is that the level Four of connecting rod grain size prepared by inventive combustion engine connecting rod liquid forging preparation technology compares figure.
Embodiment
A kind of IC engine link rod liquid forging preparation technology of the present invention, its step is：
1) before each casting of molten metal, aerosol is sprayed to convex-concave mould surface progress high-pressure wash by spray gun, and
It is intended to apply one layer of lubricant in convex-concave mould surface, the process advan is in raising forging part surface accuracy；
2) 720~730 DEG C of aluminium copper liquation is cast in casting sand box by sprue gate, liquation is poured into after mould
To hydraulic press pressurization；The time stood in a mold is 5~10s, and the time stood in the technique is too short, is unfavorable for liquation and fills out
, easily there are the defects such as stomata and microporosity, the time stood in addition in each space and gas discharge in mold filling tool
Long, melt temperature declines soon, carries out shifting to an earlier date solidification and crystallization, is unfavorable for metal and is shaped under flow regime,
3) control hydraulic press carries out matched moulds pressure forming to aluminium copper liquid in casting sand box, and matched moulds pressure speed is 35
~45cm/s, matched moulds pressure pressure is 580~620bar, and the matched moulds pressure forming time is 20~25s, in matched moulds course of exerting pressure
Nitrogen charging pressurization is carried out to gap between punch-die in casting sand box, nitrogen charging pressure is 0.5~0.7Mpa, and the technique avoids forging part
There is stomata in inside, the aluminium alloy of half curdled appearance is crystallized in sufficient Under Pressure Solidification, dense structure, crystal grain are tiny, therefore
The mechanical property of gained product is good；
4) after the completion of matched moulds pressure forming, the product of shaping stings tight core due to solidification shrinkage；Stay in cavity plate then
Workpiece is ejected by top plate push rod, connecting rod casting is taken out, allows its natural cooling.
Further, in step 3) in, matched moulds pressure speed preferably is 40cm/s, and matched moulds pressure pressure is 600bar, is closed
The mould pressure forming time is 23s, carries out nitrogen charging pressurization to gap between punch-die in casting sand box in matched moulds course of exerting pressure, fills
Nitrogen pressure is 0.6Mpa.
Further, in step 3) in, preferably before matched moulds pressing formation, preheating casting sand box in mold temperature be 140
~170 DEG C.
Further, in step 2) in, the aluminium copper preferably is prepared from by each component of following percentage by weight：
Silicon 13.5-14.75%, copper 2.0-4.0%, iron 0.5-1.05%, manganese 0.1-0.35%, magnesium 0.25-0.35%, zinc 2.0-
3.0%, nickel 0.1-0.5%, chromium 0.05-0.15%, tin 0.06-0.10%, titanium 0.01-0.15%, bismuth 0.02-0.05%, beryllium
0.001-0.02%, lithium 0.001-0.003%, surplus are aluminium, and the present embodiment uses aluminum alloy materials for 51K, and the 51K materials lead to
The content of control silicon, copper, iron, manganese and magnesium is crossed, the content rich in silicon, copper and magnesium suppresses zinc, nickel, chromium, tin, titanium, bismuth, beryllium and lithium
Content, make aluminum copper alloy material inside metallographic strong, increase by more than 3 times than common aluminum alloy tensile strength of material, have
Good mechanical property, makes its product prepared have high intensity and hardness, and HB hardness reaches 130-150；Yield strength
Reach 390MPa or so；Tensile strength reaches 360MPa or so；With it is not easy to crack, be not easily broken, the advantages of service life is long.
The Mechanical Data for the connecting rod embryo material implemented below using above-mentioned preparation method：
Embodiment one
High density aluminum copper alloy material of the present invention is prepared from by each component of following percentage by weight：Silicon 13.5%, copper
2.5%, iron 0.5%, manganese 0.1%, magnesium 0.25%, zinc 3.0%, nickel 0.5%, chromium 0.15%, tin 0.10%, titanium 0.15%, bismuth
0.05%, beryllium 0.02%, lithium 0.003%, surplus is aluminium.
During liquid forging, control hydraulic press carries out matched moulds pressure forming to aluminium copper liquid in casting sand box,
Matched moulds pressure speed is 45cm/s, and matched moulds pressure pressure is 620bar, and the matched moulds pressure forming time is 25s, is pressed in matched moulds
Nitrogen charging pressurization is carried out in journey to gap between punch-die in casting sand box, nitrogen charging pressure is 0.7Mpa.
Embodiment two
High density aluminum copper alloy material of the present invention is prepared from by each component of following percentage by weight：Silicon 14.75%, copper
4.0%, iron 1.05%, manganese 0.35%, magnesium 0.35%, zinc 3.0%, nickel 0.5%, chromium 0.15%, tin 0.10%, titanium 0.15%,
Bismuth 0.02%, beryllium 0.001%, lithium 0.001%, surplus is aluminium.
During liquid forging, control hydraulic press carries out matched moulds pressure forming to aluminium copper liquid in casting sand box,
Matched moulds pressure speed is 35/s, and matched moulds pressure pressure is 580bar, and the matched moulds pressure forming time is 20s, in matched moulds course of exerting pressure
In between punch-die in casting sand box gap carry out nitrogen charging pressurization, nitrogen charging pressure be 0.5Mpa.
Embodiment three
High density aluminum copper alloy material of the present invention is prepared from by each component of following percentage by weight：Silicon 14.2%, copper
3%, iron 0.8%, manganese 0.2%, magnesium 0.3%, zinc 2.5%, nickel 0.5%, chromium 0.1%, tin 0.08%, titanium 0.1%, bismuth
0.03%, beryllium 0.01%, lithium 0.002%, surplus is aluminium.
During liquid forging, control hydraulic press carries out matched moulds pressure forming to aluminium copper liquid in casting sand box,
Matched moulds pressure speed is 20cm/s, and matched moulds pressure pressure is 600bar, and the matched moulds pressure forming time is 23s, is pressed in matched moulds
Nitrogen charging pressurization is carried out in journey to gap between punch-die in casting sand box, nitrogen charging pressure is 0.6Mpa.
Example IV
It is prepared from using aluminum copper alloy material (A380) by each component of following percentage by weight：Silicon 7.5~9.5%,
Copper 3.0~4.0%, iron≤1.3%, manganese≤0.5%, magnesium≤0.1%, zinc≤3.0%, nickel≤0.5%, the surplus of tin 0.35% is
Aluminium；It is preferred that wherein silicon 8%, copper 3%, iron 1.3%, manganese 0.5%, magnesium 0.1%, zinc 3%, nickel 0.5%, surplus is aluminium.
During liquid forging, control hydraulic press carries out matched moulds pressure forming to aluminium copper liquid in casting sand box,
Matched moulds pressure speed is 20cm/s, and matched moulds pressure pressure is 600bar, and the matched moulds pressure forming time is 23s, is pressed in matched moulds
Nitrogen charging pressurization is carried out in journey to gap between punch-die in casting sand box, nitrogen charging pressure is 0.6Mpa.
Embodiment five
It is prepared from using aluminum copper alloy material (ADC12) by each component of following percentage by weight：Silicon 9.6~12%,
Copper 1.5~3.5%, iron≤1.3%, manganese≤0.5%, magnesium≤0.3%, zinc≤1%, nickel≤0.5%, tin≤0.20%, lead≤
0.2%, surplus is aluminium, wherein silicon 10% preferably, copper 2%, iron 1%, manganese 0.3%, magnesium 0.2%, zinc 0.8%, nickel 0.3%,
Tin 0.1%, lead 0.1%, surplus is aluminium.
During liquid forging, control hydraulic press carries out matched moulds pressure forming to aluminium copper liquid in casting sand box,
Matched moulds pressure speed is 20cm/s, and matched moulds pressure pressure is 600bar, and the matched moulds pressure forming time is 23s, is pressed in matched moulds
Nitrogen charging pressurization is carried out in journey to gap between punch-die in casting sand box, nitrogen charging pressure is 0.6Mpa.
Embodiment six
It is prepared from using aluminum copper alloy material (ZL111) by each component of following percentage by weight：Silicon 8~10%, copper
1.3~1.8%, iron≤0.4%, manganese≤0.1~0.35%, magnesium 0.4~0.6%, zinc≤0.1%, titanium 0.1~0.35, tin≤
0.01%, lead≤0.05%, surplus is aluminium, wherein silicon 9% preferably, copper 1.5%, iron 0.2%, manganese 0.2%, magnesium 0.5%, zinc
0.8%, titanium 0.2, tin 0.008%, lead 0.03%, surplus is aluminium.
During liquid forging, control hydraulic press carries out matched moulds pressure forming to aluminium copper liquid in casting sand box,
Matched moulds pressure speed is 20cm/s, and matched moulds pressure pressure is 600bar, and the matched moulds pressure forming time is 23s, is pressed in matched moulds
Nitrogen charging pressurization is carried out in journey to gap between punch-die in casting sand box, nitrogen charging pressure is 0.6Mpa.
Each mechanical performance detection data of sample obtained by embodiment 1-6 are shown in Table 1 under the same terms：
As can be known from the above table, preparation technology of the present invention by control rich in silicon, copper and magnesium content, suppress zinc, nickel, chromium, tin,
Titanium, bismuth, the content of beryllium and lithium, the tensile strength, yield strength and HB of connecting rod can be lifted simultaneously, is made inside aluminum copper alloy material
Metallographic structure is strong, and dense structure, crystal grain are tiny, with good mechanical property.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (4)
1. a kind of IC engine link rod liquid forging preparation technology, it is characterised in that：Its step is：
1) before each casting of molten metal, aerosol is sprayed by spray gun high-pressure wash is carried out to convex-concave mould surface, and in convex-concave
It is intended to apply one layer of lubricant in mould surface；
2) 720~730 DEG C of aluminium copper liquation is cast in casting sand box by sprue gate, liquation is poured into after mould to liquid
Before press pressurization；The time stood in a mold is 5~10s；
3) control hydraulic press in casting sand box aluminium copper liquid carry out matched moulds pressure forming, matched moulds pressure speed be 35~
45cm/s, matched moulds pressure pressure is 580~620bar, and the matched moulds pressure forming time is 20~25s, right in matched moulds course of exerting pressure
Gap carries out nitrogen charging pressurization between punch-die in casting sand box, and nitrogen charging pressure is 0.5~0.7Mpa；
4) after the completion of matched moulds pressure forming, the product of shaping stings tight core due to solidification shrinkage；Stay in cavity plate and then pass through
Top plate push rod ejects workpiece, takes out connecting rod casting, allows its natural cooling.
2. IC engine link rod liquid forging preparation technology according to claim 1, it is characterised in that：In step 3) in, close
Mould pressure speed is 40cm/s, and matched moulds pressure pressure is 600bar, and the matched moulds pressure forming time is 23s, in matched moulds course of exerting pressure
In between punch-die in casting sand box gap carry out nitrogen charging pressurization, nitrogen charging pressure be 0.6Mpa.
3. IC engine link rod liquid forging preparation technology according to claim 1, it is characterised in that：In step 3) in,
Before matched moulds pressing formation, mold temperature is 140~170 DEG C in preheating casting sand box.
4. IC engine link rod liquid forging preparation technology according to claim 1, it is characterised in that：In step 2) in, institute
Aluminium copper is stated to be prepared from by each component of following percentage by weight：Silicon 13.5-14.75%, copper 2.0-4.0%, iron 0.5-
1.05%, manganese 0.1-0.35%, magnesium 0.25-0.35%, zinc 2.0-3.0%, nickel 0.1-0.5%, chromium 0.05-0.15%, tin
0.06-0.10%, titanium 0.01-0.15%, bismuth 0.02-0.05%, beryllium 0.001-0.02%, lithium 0.001-0.003%, surplus is
Aluminium.
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| CN201710487219.2A CN107243616B (en) | 2017-06-23 | 2017-06-23 | A kind of IC engine link rod liquid forging preparation process |
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| CN107243616A true CN107243616A (en) | 2017-10-13 |
| CN107243616B CN107243616B (en) | 2019-03-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112342437A (en) * | 2020-11-20 | 2021-02-09 | 宁波北理汽车科技股份有限公司 | Crankshaft connecting rod preparation process |
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| CN1488458A (en) * | 2003-08-14 | 2004-04-14 | 强 张 | Process for extrusion casting piston blank of internal combustion engine with local feinforcing of metal base composite material |
| US20110123821A1 (en) * | 2008-07-17 | 2011-05-26 | Denki Kagaku Kogyo Kabushiki Kaisha | Aluminum-diamond composite and manufacturing method |
| CN102615268A (en) * | 2012-04-17 | 2012-08-01 | 江苏大学 | Antigravity squeeze casting device of aluminum alloy connecting rod and manufacture method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112342437A (en) * | 2020-11-20 | 2021-02-09 | 宁波北理汽车科技股份有限公司 | Crankshaft connecting rod preparation process |
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