CN107365938A - A kind of automobile exhaust pipe and its processing method - Google Patents
A kind of automobile exhaust pipe and its processing method Download PDFInfo
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- CN107365938A CN107365938A CN201710611908.XA CN201710611908A CN107365938A CN 107365938 A CN107365938 A CN 107365938A CN 201710611908 A CN201710611908 A CN 201710611908A CN 107365938 A CN107365938 A CN 107365938A
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- exhaust pipe
- automobile exhaust
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/16—Selection of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2530/00—Selection of materials for tubes, chambers or housings
- F01N2530/02—Corrosion resistive metals
- F01N2530/04—Steel alloys, e.g. stainless steel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a kind of automobile exhaust pipe, is prepared by the raw material of following parts by weight：C3~5 part, 1.8~2.5 parts of Mn, 3.8~5 parts of Si, 2~4 parts of Mo, 1~1.5 part of Al, 1.5~2.1 parts of Cu, 1.0~1.5 parts of Mg, 2~3 parts of Ni, 2~6 parts of Cr, 3~7 parts of Ti, surplus are Fe and inevitable impurity.Automobile exhaust pipe of the present invention can bear judder when engine is stopped, and under severe conditions, can also work well, and due to the new material of blast pipe, noise problem can be substantially reduced, so using more extensive and durable in use, anticorrosive, intensity is high；And preparation technology has method simple, production cost is low, can be applied to large-scale production.
Description
Technical field
The present invention relates to automobile exhaust pipe technical field, and in particular to a kind of automobile exhaust pipe and its processing method.
Background technology
As China's economy maintains sustained and rapid growth, also more and more higher, especially automobile have become the living standard of people
Today's society resident's new consumption hotspot.Currently, energy-saving and emission-reduction have become the sharp weapon of automobile industry competition, therefore the row of automobile
Gas system also just all the more important, and the elements such as a small amount of Mn, Nb are added in ferroalloy, make ferroalloy that there is good deep-draw
Property, and other performances of gas extraction system can be improved.
At present, all there is problems with many automobile exhaust pipes：When blast pipe must be able to bear engine to stop when working
Caused judder, for a long time using automobile after, blast pipe there is also the king-sized problem of noise, and corruption of easily getting rusty
Erosion.Therefore, in order to solve problem above, the invention discloses a kind of automobile exhaust pipe of new material, engine can be born
Judder when stopping, under severe conditions, it can also work well；And due to the new material of blast pipe, can
Noise problem is substantially reduced, so simple and convenient using more extensive and durable in use, anticorrosive, intensity height, processing and fabricating.Cause
This, the present invention provides a kind of automobile exhaust system of new material,；
The content of the invention
To solve the above problems, the invention provides a kind of automobile exhaust pipe and its processing method, pass through above-mentioned processing side
The blast pipe that method is produced has excellent mouldability, corrosion resistance, high temperature resistant, anti-oxidant good deep drawing quality, smooth in exhaust, nothing
Pollution, energy-conserving and environment-protective, the characteristic for reducing cost, increasing the service life.In current automotive material to lightweight, energy-saving and environmental protection side
To today of development, there is wide development space
To achieve the above object, the technical scheme taken of the present invention is：
A kind of automobile exhaust pipe, it is prepared by the raw material of following parts by weight：C3~5 part, 1.8~2.5 parts of Mn, Si
3.8~5 parts, 2~4 parts of Mo, 1~1.5 part of Al, 1.5~2.1 parts of Cu, 1.0~1.5 parts of Mg, 2~3 parts of Ni, Cr 2~6
Part, 3~7 parts of Ti, surplus is Fe and inevitable impurity.
The embodiment of the present invention also provides a kind of processing method of automobile exhaust pipe, specifically includes following steps：S1, weigh one
Quantitative C3~5 part, 3.8~5 parts of Si, 2~4 parts of Mo, 1.0~1.5 parts of Mg, 2~3 parts of Ni, 2~6 parts of Cr, Ti 3~7
Part, surplus is that Fe and inevitable impurity take the lead in pouring into and high-temperature heating melting carried out in smelting furnace, when temperature reaches 1600~
At 1700 DEG C, 1.5~2.1 parts of Cu, 1~1.5 part of Al and Mn 1.8~2.5 are added in the form of Cu-Al-Mn prealloys, from
And obtain hybrid metal liquid；
S2, the hybrid metal liquid of gained in step S1 is passed through nitrogen and carries out refining degasification, obtain refining hybrid metal liquid；
S3, continuous casting operation will be carried out in gained refining hybrid metal liquid addition conticaster in step S2, obtain sheet alloy；
S4, by step S3 gained sheet alloy two-sided copper facing operation is carried out by electroplating machine；
S5, the sheet alloy after copper facing is quickly rolled into tubulose by roller press again, copper pricker is carried out finally by brazier
It is welded into double-layer alloy tubing；
S6, by the double-layer alloy tubing of gained in step S5 by withdrawal straightening machine and slitter, carry out straightening, slitting behaviour successively
Make, then polished by Plane surface grinding machine, obtain air gap pipes first product；
S7, the blast pipe first product obtained by step S6 carried out by Plane surface grinding machine to polish operation, carry out pickling afterwards and arranged
Tracheae finished product；
S8, by the blast pipe finished product obtained by step S7, be put in storage by test package.
Preferably, smelting temperature is 1600~1850 DEG C in the step S1, smelting time is 1.5~2h.
Preferably, casting temperature is 1000~1200 DEG C in the step S3.
Preferably, roller press rolling times are 4~10 times in the step S5.
Preferably, pickle concentration is 5~7 degree in pickling in the step S7.
The present invention has the advantages that compared with prior art：
Automobile exhaust pipe of the present invention can bear judder when engine is stopped, under severe conditions, can also be very
Good work；And due to the new material of blast pipe, noise problem can be substantially reduced, so using more extensive and prolonged
Durable, anticorrosive, intensity is high, the automobile engine exhaust pipe of the simple and convenient production of processing and fabricating, its heat resistance it is good and into
This is low；With excellent mouldability, corrosion resistance, high temperature resistant, anti-oxidant good deep drawing quality, smooth in exhaust, pollution-free, energy-saving ring
The characteristic for protecting, reducing cost, increasing the service life, in the present that current automotive material develops to lightweight, energy-saving and environmental protection direction
My god, there is wide development space；The processing preparation technology of the present invention has method simple, and production cost is low, can be applied to
Large-scale production.
It is good by the automobile exhaust pipe high temperature resistant of the invention produced, corrosion resistance, it can make for a long time in high temperature environments
With, non-corroding, without cracking；Alternative stainless steel and other such as refractory material high temperature resistant, corrosion resistant materials, linear expansion coefficient
In the case of suitable with prior art, there is smaller thermal coefficient of expansion and more superior machining property.
Embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
Automobile exhaust pipe of the present invention is prepared by the raw material of following parts by weight：C3~5 part, Mn 1.8~2.5
Part, 3.8~5 parts of Si, 2~4 parts of Mo, 1~1.5 part of Al, 1.5~2.1 parts of Cu, 1.0~1.5 parts of Mg, 2~3 parts of Ni, Cr
2~6 parts, 3~7 parts of Ti, surplus are Fe and inevitable impurity.
The embodiment of the present invention also provides a kind of processing method of automobile exhaust pipe, specifically includes following steps：S1, weigh one
Quantitative C3~5 part, 3.8~5 parts of Si, 2~4 parts of Mo, 1.0~1.5 parts of Mg, 2~3 parts of Ni, 2~6 parts of Cr, Ti 3~7
Part, surplus is that Fe and inevitable impurity take the lead in pouring into and high-temperature heating melting carried out in smelting furnace, when temperature reaches 1600~
At 1700 DEG C, 1.5~2.1 parts of Cu, 1~1.5 part of Al and Mn 1.8~2.5 are added in the form of Cu-Al-Mn prealloys, from
And obtain hybrid metal liquid；
S2, the hybrid metal liquid of gained in step S1 is passed through nitrogen and carries out refining degasification, obtain refining hybrid metal liquid；
S3, continuous casting operation will be carried out in gained refining hybrid metal liquid addition conticaster in step S2, obtain sheet alloy；
S4, by step S3 gained sheet alloy two-sided copper facing operation is carried out by electroplating machine；
S5, the sheet alloy after copper facing is quickly rolled into tubulose by roller press again, copper pricker is carried out finally by brazier
It is welded into double-layer alloy tubing；
S6, by the double-layer alloy tubing of gained in step S5 by withdrawal straightening machine and slitter, carry out straightening, slitting behaviour successively
Make, then polished by Plane surface grinding machine, obtain air gap pipes first product；
S7, the blast pipe first product obtained by step S6 carried out by Plane surface grinding machine to polish operation, carry out pickling afterwards and arranged
Tracheae finished product；
S8, by the blast pipe finished product obtained by step S7, be put in storage by test package.
Wherein, smelting temperature is 1600~1850 DEG C in step S1, wherein smelting time is 1.5~2h；The step
Casting temperature is 1000~1200 DEG C in S3；Roller press rolling times are 4~10 times in the step S5；It is sour in the step S7
Middle pickle concentration is washed as 5~7 degree.
Embodiment 1：
S1, first choice weigh 3 parts of C, 4 parts of Si, Mo2 parts, 1.0 parts of Mg, 2 parts of Ni, 5 parts of Cr, 3 parts of Ti, surplus Fe
Take the lead in pouring into inevitable impurity and high-temperature heating melting is carried out in smelting furnace, when temperature reaches 1600 DEG C, by Cu 1.5
Part, 1.8 parts of 1 part of Al and Mn is added in the form of Cu-Al-Mn prealloys, in the case where smelting temperature is 1600 DEG C, during melting
Obtain hybrid metal liquid within 1.5 hours；
S2, the hybrid metal liquid of gained in step S1 is passed through nitrogen and carries out refining degasification, obtain refining hybrid metal liquid；
S3, continuous casting operation will be carried out in gained refining hybrid metal liquid addition conticaster in step S2, casting temperature is
1000 DEG C, obtain sheet alloy；
S4, by step S3 gained sheet alloy two-sided copper facing operation is carried out by electroplating machine；
S5, the sheet alloy after copper facing is quickly rolled 4 times into tubulose by roller press again, copper is carried out finally by brazier
Soldering is into double-layer alloy tubing；
S6, by the double-layer alloy tubing of gained in step S5 by withdrawal straightening machine and slitter, carry out straightening, slitting behaviour successively
Make, then polished by Plane surface grinding machine, obtain air gap pipes first product；
S7, the blast pipe first product obtained by step S6 carried out by Plane surface grinding machine to polish operation, carry out pickling afterwards and arranged
Tracheae finished product, wherein, pickle concentration is 5 degree in pickling；
S8, by the blast pipe finished product obtained by step S7, be put in storage by test package.
Embodiment 2：
S1, first choice weigh 4 parts of C, 5 parts of Si, 3 parts of Mo, 1.5 parts of Mg, 2.5 parts of Ni, 2 parts of Cr, 4 parts of Ti, and surplus is
Fe and inevitable impurity, which take the lead in pouring into, carries out high-temperature heating melting in smelting furnace, when temperature reaches 1650 DEG C, by Cu 2
Part, 2 parts of 1.2 parts of Al and Mn is added in the form of Cu-Al-Mn prealloys, in the case where smelting temperature is 1700 DEG C, during melting
Obtain hybrid metal liquid within 2 hours；
S2, the hybrid metal liquid of gained in step S1 is passed through nitrogen and carries out refining degasification, obtain refining hybrid metal liquid；
S3, continuous casting operation will be carried out in gained refining hybrid metal liquid addition conticaster in step S2, casting temperature is
1100 DEG C, obtain sheet alloy；
S4, by step S3 gained sheet alloy two-sided copper facing operation is carried out by electroplating machine；
S5, the sheet alloy after copper facing is quickly rolled 6 times into tubulose by roller press again, copper is carried out finally by brazier
Soldering is into double-layer alloy tubing；
S6, by the double-layer alloy tubing of gained in step S5 by withdrawal straightening machine and slitter, carry out straightening, slitting behaviour successively
Make, then polished by Plane surface grinding machine, obtain air gap pipes first product；
S7, the blast pipe first product obtained by step S6 carried out by Plane surface grinding machine to polish operation, carry out pickling afterwards and arranged
Tracheae finished product, wherein, pickle concentration is 6 degree in pickling；
S8, by the blast pipe finished product obtained by step S7, be put in storage by test package.
Embodiment 3：
S1, first choice weigh 5 parts of C, 4 parts of Si, 4 parts of Mo, 1.3 parts of Mg, 3 parts of Ni, 6 parts of Cr, 4 parts of Ti, surplus Fe
Take the lead in pouring into inevitable impurity and high-temperature heating melting is carried out in smelting furnace, when temperature reaches 1700 DEG C, by Cu 2.1
2.5 parts of part, 1.5 parts of Al and Mn are added in the form of Cu-Al-Mn prealloys, in the case where smelting temperature is 1850 DEG C, melting
When obtain hybrid metal liquid within 2 hours；
S2, the hybrid metal liquid of gained in step S1 is passed through nitrogen and carries out refining degasification, obtain refining hybrid metal liquid；
S3, continuous casting operation will be carried out in gained refining hybrid metal liquid addition conticaster in step S2, casting temperature is
1200 DEG C, obtain sheet alloy；
S4, by step S3 gained sheet alloy two-sided copper facing operation is carried out by electroplating machine；
S5, the sheet alloy after copper facing is quickly rolled 10 times into tubulose by roller press again, carried out finally by brazier
Copper brazing is into double-layer alloy tubing；
S6, by the double-layer alloy tubing of gained in step S5 by withdrawal straightening machine and slitter, carry out straightening, slitting behaviour successively
Make, then polished by Plane surface grinding machine, obtain air gap pipes first product；
S7, the blast pipe first product obtained by step S6 carried out by Plane surface grinding machine to polish operation, carry out pickling afterwards and arranged
Tracheae finished product, wherein, pickle concentration is 7 degree in pickling；
S8, by the blast pipe finished product obtained by step S7, be put in storage by test package.
Automobile exhaust pipe of the present invention can bear judder when engine is stopped, under severe conditions, can also be very
Good work；And due to the new material of blast pipe, noise problem can be substantially reduced, so using more extensive and prolonged
Durable, anticorrosive, intensity is high, the automobile engine exhaust pipe of the simple and convenient production of processing and fabricating, its heat resistance it is good and into
This is low；With excellent mouldability, corrosion resistance, high temperature resistant, anti-oxidant good deep drawing quality, smooth in exhaust, pollution-free, energy-saving ring
The characteristic for protecting, reducing cost, increasing the service life, in the present that current automotive material develops to lightweight, energy-saving and environmental protection direction
My god, there is wide development space.Wherein, tensile strength Rm >=850N/mm of blast pipe2, yield strength Rp0.2 >=800N/
mm2, fracture elongation≤0.25%.It is good by the automobile exhaust pipe high temperature resistant of the invention produced, corrosion resistance, in high temperature
Can be long-term use of under environment, non-corroding, without cracking；Alternative stainless steel and other such as refractory material high temperature resistant, corrosion resistancies
Material, in the case that linear expansion coefficient is suitable with prior art, there is smaller thermal coefficient of expansion and more superior machining
Performance.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (6)
1. a kind of automobile exhaust pipe, it is characterised in that be prepared by the raw material of following parts by weight：C3~5 part, Mn 1.8~
2.5 parts, 3.8~5 parts of Si, 2~4 parts of Mo, 1~1.5 part of Al, 1.5~2.1 parts of Cu, 1.0~1.5 parts of Mg, Ni 2~3
Part, 2~6 parts of Cr, 3~7 parts of Ti, surplus are Fe and inevitable impurity.
2. a kind of processing method of automobile exhaust pipe, it is characterised in that comprise the following steps：
S1, weigh a certain amount of C3~5 part, 3.8~5 parts of Si, 2~4 parts of Mo, 1.0~1.5 parts of Mg, 2~3 parts of Ni, Cr 2
~6 parts, 3~7 parts of Ti, surplus are that Fe and inevitable impurity take the lead in pouring into and high-temperature heating melting carried out in smelting furnace, work as temperature
When degree reaches 1600~1700 DEG C, by 1.5~2.1 parts of Cu, 1~1.5 part of Al and Mn 1.8~2.5 with Cu-Al-Mn prealloys
Form adds, so as to obtain hybrid metal liquid；
S2, the hybrid metal liquid of gained in step S1 is passed through nitrogen and carries out refining degasification, obtain refining hybrid metal liquid；
S3, continuous casting operation will be carried out in gained refining hybrid metal liquid addition conticaster in step S2, obtain sheet alloy；
S4, by step S3 gained sheet alloy two-sided copper facing operation is carried out by electroplating machine；
S5, the sheet alloy after copper facing is quickly rolled into tubulose by roller press again, finally by brazier carry out copper brazing into
Double-layer alloy tubing；
S6, by the double-layer alloy tubing of gained in step S5 by withdrawal straightening machine and slitter, carry out straightening, slitting operation successively,
Then polished by Plane surface grinding machine, obtain air gap pipes first product；
S7, the blast pipe first product obtained by step S6 carried out by Plane surface grinding machine to polish operation, carry out pickling afterwards and obtain blast pipe
Finished product；
S8, by the blast pipe finished product obtained by step S7, be put in storage by test package.
3. the processing method of automobile exhaust pipe according to claim 2, it is characterised in that smelting temperature in the step S1
For 1600~1850 DEG C, smelting time is 1.5~2h.
4. the processing method of automobile exhaust pipe according to claim 2, it is characterised in that casting temperature in the step S3
For 1000~1200 DEG C.
5. the processing method of automobile exhaust pipe according to claim 2, it is characterised in that roller press rolls in the step S5
It is 4~10 times to press number.
6. the processing method of automobile exhaust pipe according to claim 2, it is characterised in that sour in pickling in the step S7
Washing lotion concentration is 5~7 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710611908.XA CN107365938A (en) | 2017-07-25 | 2017-07-25 | A kind of automobile exhaust pipe and its processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710611908.XA CN107365938A (en) | 2017-07-25 | 2017-07-25 | A kind of automobile exhaust pipe and its processing method |
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| CN107365938A true CN107365938A (en) | 2017-11-21 |
Family
ID=60308614
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| CN201710611908.XA Pending CN107365938A (en) | 2017-07-25 | 2017-07-25 | A kind of automobile exhaust pipe and its processing method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53134724A (en) * | 1978-02-06 | 1978-11-24 | Takaoka Kogyo Kk | Nonglowing cast iron for exhaust pipe |
| JP2000256781A (en) * | 1999-03-11 | 2000-09-19 | Nkk Corp | Steel for lng combustion exhaust gas flow passage |
| CN103614668A (en) * | 2013-12-06 | 2014-03-05 | 新昌县永强空调配件有限公司 | Heat-resistant steel for automobile exhaust pipe |
| CN103898398A (en) * | 2014-04-14 | 2014-07-02 | 天津达祥精密工业有限公司 | High-silicon molybdenum-chromium ferrite heat-resisting spheroidal graphite cast iron for car turbine housings and car exhaust pipes |
| CN104178686A (en) * | 2014-08-29 | 2014-12-03 | 青岛海之冠汽车配件制造有限公司 | High temperature-resistant and corrosion-resistant cast iron alloy and preparation process thereof |
| CN105673173A (en) * | 2015-12-31 | 2016-06-15 | 芜湖恒耀汽车零部件有限公司 | Exhaust pipe made from novel high-performance materials and manufacturing process of exhaust pipe |
-
2017
- 2017-07-25 CN CN201710611908.XA patent/CN107365938A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53134724A (en) * | 1978-02-06 | 1978-11-24 | Takaoka Kogyo Kk | Nonglowing cast iron for exhaust pipe |
| JP2000256781A (en) * | 1999-03-11 | 2000-09-19 | Nkk Corp | Steel for lng combustion exhaust gas flow passage |
| CN103614668A (en) * | 2013-12-06 | 2014-03-05 | 新昌县永强空调配件有限公司 | Heat-resistant steel for automobile exhaust pipe |
| CN103898398A (en) * | 2014-04-14 | 2014-07-02 | 天津达祥精密工业有限公司 | High-silicon molybdenum-chromium ferrite heat-resisting spheroidal graphite cast iron for car turbine housings and car exhaust pipes |
| CN104178686A (en) * | 2014-08-29 | 2014-12-03 | 青岛海之冠汽车配件制造有限公司 | High temperature-resistant and corrosion-resistant cast iron alloy and preparation process thereof |
| CN105673173A (en) * | 2015-12-31 | 2016-06-15 | 芜湖恒耀汽车零部件有限公司 | Exhaust pipe made from novel high-performance materials and manufacturing process of exhaust pipe |
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Application publication date: 20171121 |