CN105525207A - Automobile exhaust pipe and preparation method thereof - Google Patents
Automobile exhaust pipe and preparation method thereof Download PDFInfo
- Publication number
- CN105525207A CN105525207A CN201511012736.1A CN201511012736A CN105525207A CN 105525207 A CN105525207 A CN 105525207A CN 201511012736 A CN201511012736 A CN 201511012736A CN 105525207 A CN105525207 A CN 105525207A
- Authority
- CN
- China
- Prior art keywords
- parts
- exhaust pipe
- automobile exhaust
- preparation
- gained
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
- C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- 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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
Abstract
The invention discloses an automobile exhaust pipe and a preparation method thereof. The automobile exhaust pipe is prepared from the following raw materials in parts by weight: 8-12 parts of carbon, 10-18 parts of manganese, 3-8 parts of sulphur, 2-4 parts of copper, 3-8 parts of aluminium, 3-7 parts of zinc, 20-32 parts of nickel, 4-8 parts of cobalt, 2-11 parts of chromium, 1-4 parts of vanadium, and the balance iron and inevitable impurities. The automobile exhaust pipe disclosed by the invention has the characteristics of excellent formability, corrosion resistance, high temperature resistance, high-oxidation-resistance deep drawability, smooth exhaust, no pollution, energy saving and environmental protection, cost lowering and service life prolonging, and has a wide development space in lightweight, energy-saving and environmental-protection direction of development of automobile materials in nowadays; the production and machining method disclosed by the invention is simple in process and stable in production; and the produced exhaust pipe is high in effect, performance and heat resistance, and low in cost.
Description
Technical field
The present invention relates to vapor pipe technical field, be specifically related to a kind of automobile exhaust pipe and preparation method thereof.
Background technology
Along with China's sustain economic increases fast, the standard of living of people is also more and more higher, and especially automobile has become society resident new consumption hotspot.Current, energy-saving and emission-reduction have become the sharp weapon of automobile industry competition, therefore the exhaust system of automobile also just all the more important, and in iron alloy, add the elements such as a small amount of Mn, Nb, make iron alloy have good deep drawing quality, and other performances of exhaust system can be improved.Therefore, the invention provides a kind of automobile exhaust system of type material, there is excellent formability, solidity to corrosion, high temperature resistant, anti-oxidant good deep drawing quality, smooth in exhaust, pollution-free, energy-conserving and environment-protective, the characteristic that reduces costs, increase the service life, in current automotive material today to lightweight, energy-saving and environmental protection future development, there is wide development space;
Automobile exhaust pipe is in automobile rear end, and residing operating ambient temperature is very high, and require very high to thermotolerance, shock resistance and erosion resistance, these components are manufactured by steel plate by means of press working, therefore require that mother metal steel plate has pressure forming.On the other hand, the envrionment temperature of use also improves year by year, is necessary the addition of the alloying elements such as increase Cr, Mo, Nb and improves hot strength, oxidation-resistance and thermal fatigue characteristics etc.When Addition ofelements increases, adopt simple manufacture method that the processibility of mother metal steel plate just can be made to reduce, therefore usually can not carry out pressure forming.
The index of processibility has ductility and deep drawability etc., but in the processing of vapor pipe, important having becomes elongation and the r value of basic index.In the production process of current internal sheet metal due to deformation rate during finish rolling and technique passage grasp bad, straightening tension force, speed are improper, cause thickness and precision not high, template poor quality.Cause during automobile exhaust pipe tubulation and often occur the situation such as crackle and stammerer.In the raising of r value, it is effective for strengthening cold rolling draft, but, above-mentioned component by thicker material (about 1.5 ~ 2mm) as mother metal, so in the existing manufacturing process limited to a certain degree at the thickness of cold rolling mother metal, can not fully guarantee cold rolling draft.
Summary of the invention
For solving the problem, the invention provides a kind of automobile exhaust pipe and preparation method thereof.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of automobile exhaust pipe and preparation method thereof, comprises and being prepared from by the raw material of following weight part:
8 ~ 12 parts, carbon, 10 ~ 18 parts, manganese, sulphur 3 ~ 8 parts, copper 2 ~ 4 parts, 3 ~ 8 parts, aluminium, 3 ~ 7 parts, zinc, 20 ~ 32 parts, nickel, cobalt 4 ~ 8 parts, chromium 2 ~ 11 parts, vanadium 1 ~ 4 part, surplus are iron and inevitable impurity.
Further, comprise the steps:
S1, take 8 ~ 12 parts, a certain amount of carbon, 10 ~ 18 parts, manganese, sulphur 3 ~ 8 parts, copper 2 ~ 4 parts, 3 ~ 8 parts, aluminium, 3 ~ 7 parts, zinc, 20 ~ 32 parts, nickel, cobalt 4 ~ 8 parts, chromium 2 ~ 11 parts, vanadium 1 ~ 4 part, surplus are iron and inevitably impurity is for subsequent use, in vacuum induction furnace, first add manganese, copper, aluminium, zinc and iron carry out heat melting formation solution, add carbon, sulphur, nickel, cobalt, chromium and vanadium again to carry out adding hot smelting, obtain hybrid metal liquid;
S2, pour the hybrid metal liquid of gained in step S1 into hot rolls and carry out hot rolled coil operation, after annealing, obtain alloy rolled material;
S3, gained alloy rolled material in step S2 is undertaken being rolled into tubulose 3-4 time by roller press, be welded into double-layer alloy tubing by spot-welding gun;
S4, by the double-layer alloy tubing of gained in step S3 by withdrawal straightening machine and slitter, carry out successively straightening, slitting operation, then polished by Plane surface grinding machine, obtain air gap pipes finished product;
S5, by the air gap pipes finished product of step S4 gained, to be put in storage by test package.
Further, in described step S1, smelting temperature is 1500 ~ 1800 DEG C, and smelting time is 0.5 ~ 1.5h.
Further, in described step S2, hot-rolled temperature is 800 ~ 1100 DEG C, and the hot rolling time is 1 ~ 2h.
Further, in described step S2, annealing temperature is 600 ~ 900 DEG C, and annealing speed is 9 ~ 10 ms/min.
Further, in described step S3, roller press arranges 4 ~ 8 pressure rollers.
The present invention has excellent formability, solidity to corrosion, high temperature resistant, anti-oxidant good deep drawing quality, smooth in exhaust, pollution-free, energy-conserving and environment-protective, the characteristic that reduces costs, increase the service life, in current automotive material today to lightweight, energy-saving and environmental protection future development, there is wide development space; It is simple that the present invention makes working method flow process, and make stable, the vapor pipe made is respond well, and performance is good; Resistance toheat is good and cost is low.
Embodiment
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The present invention includes and be prepared from by the raw material of following weight part: be prepared from by the raw material of following weight part:
8 ~ 12 parts, carbon, 10 ~ 18 parts, manganese, sulphur 3 ~ 8 parts, copper 2 ~ 4 parts, 3 ~ 8 parts, aluminium, 3 ~ 7 parts, zinc, 20 ~ 32 parts, nickel, cobalt 4 ~ 8 parts, chromium 2 ~ 11 parts, vanadium 1 ~ 4 part, surplus are iron and inevitable impurity.
A kind of automobile exhaust pipe and preparation method thereof, comprises the steps:
S1, take 8 ~ 12 parts, a certain amount of carbon, 10 ~ 18 parts, manganese, sulphur 3 ~ 8 parts, copper 2 ~ 4 parts, 3 ~ 8 parts, aluminium, 3 ~ 7 parts, zinc, 20 ~ 32 parts, nickel, cobalt 4 ~ 8 parts, chromium 2 ~ 11 parts, vanadium 1 ~ 4 part, surplus are iron and inevitably impurity is for subsequent use, in vacuum induction furnace, first add manganese, copper, aluminium, zinc and iron carry out heat melting formation solution, add carbon, sulphur, nickel, cobalt, chromium and vanadium again to carry out adding hot smelting, obtain hybrid metal liquid;
S2, pour the hybrid metal liquid of gained in step S1 into hot rolls and carry out hot rolled coil operation, after annealing, obtain alloy rolled material;
S3, gained alloy rolled material in step S2 is undertaken being rolled into tubulose 3-4 time by roller press, be welded into double-layer alloy tubing by spot-welding gun;
S4, by the double-layer alloy tubing of gained in step S3 by withdrawal straightening machine and slitter, carry out successively straightening, slitting operation, then polished by Plane surface grinding machine, obtain air gap pipes finished product;
S5, by the air gap pipes finished product of step S4 gained, to be put in storage by test package.
In described step S1, smelting temperature is 1500 ~ 1800 DEG C, and smelting time is 0.5 ~ 1.5h.
In described step S2, hot-rolled temperature is 800 ~ 1100 DEG C, and the hot rolling time is 1 ~ 2h.
In described step S2, annealing temperature is 600 ~ 900 DEG C, and annealing speed is 9 ~ 10 ms/min.
In described step S3, roller press arranges 4 ~ 8 pressure rollers.
embodiment 1:
S1, take 11 parts, a certain amount of carbon, 15 parts, manganese, sulphur 5 parts, copper 3 parts, 4 parts, aluminium, 7 parts, zinc, 27 parts, nickel, cobalt 4 parts, chromium 2 parts, vanadium 4 parts, surplus are iron and inevitably impurity is for subsequent use, in vacuum induction furnace, first add manganese, copper, aluminium, zinc and iron carry out heat melting formation solution, add carbon, sulphur, nickel, cobalt, chromium and vanadium again to carry out adding hot smelting, obtain hybrid metal liquid;
S2, pour the hybrid metal liquid of gained in step S1 into hot rolls and carry out hot rolled coil operation, after annealing, obtain alloy rolled material;
S3, gained alloy rolled material in step S2 is undertaken being rolled into tubulose 3-4 time by roller press, be welded into double-layer alloy tubing by spot-welding gun;
S4, by the double-layer alloy tubing of gained in step S3 by withdrawal straightening machine and slitter, carry out successively straightening, slitting operation, then polished by Plane surface grinding machine, obtain air gap pipes finished product;
S5, by the air gap pipes finished product of step S4 gained, to be put in storage by test package.
In described step S1, smelting temperature is 1600 DEG C, and smelting time is 0.57h.
In described step S2, hot-rolled temperature is 900 DEG C, and the hot rolling time is 1h.
In described step S2, annealing temperature is 700 DEG C, and annealing speed is 9 ms/min.
In described step S3, roller press arranges 4 ~ 8 pressure rollers.
embodiment 2:
S1, take 8 parts, a certain amount of carbon, 10 parts, manganese, sulphur 3 parts, copper 4 parts, 8 parts, aluminium, 3 parts, zinc, 20 parts, nickel, cobalt 8 parts, chromium 11 parts, vanadium 4 parts, surplus are iron and inevitably impurity is for subsequent use, in vacuum induction furnace, first add manganese, copper, aluminium, zinc and iron carry out heat melting formation solution, add carbon, sulphur, nickel, cobalt, chromium and vanadium again to carry out adding hot smelting, obtain hybrid metal liquid;
S2, pour the hybrid metal liquid of gained in step S1 into hot rolls and carry out hot rolled coil operation, after annealing, obtain alloy rolled material;
S3, gained alloy rolled material in step S2 is undertaken being rolled into tubulose 3-4 time by roller press, be welded into double-layer alloy tubing by spot-welding gun;
S4, by the double-layer alloy tubing of gained in step S3 by withdrawal straightening machine and slitter, carry out successively straightening, slitting operation, then polished by Plane surface grinding machine, obtain air gap pipes finished product;
S5, by the air gap pipes finished product of step S4 gained, to be put in storage by test package.
In described step S1, smelting temperature is 1500 DEG C, and smelting time is 1.5h.
In described step S2, hot-rolled temperature is 1100 DEG C, and the hot rolling time is 1h.
In described step S2, annealing temperature is 900 DEG C, and annealing speed is 9 ms/min.
In described step S3, roller press arranges 4 ~ 8 pressure rollers.
embodiment 3:
S1, take 12 parts, a certain amount of carbon, 18 parts, manganese, sulphur 8 parts, copper 4 parts, 8 parts, aluminium, 7 parts, zinc, 32 parts, nickel, cobalt 8 parts, chromium 11 parts, vanadium 4 parts, surplus are iron and inevitably impurity is for subsequent use, in vacuum induction furnace, first add manganese, copper, aluminium, zinc and iron carry out heat melting formation solution, add carbon, sulphur, nickel, cobalt, chromium and vanadium again to carry out adding hot smelting, obtain hybrid metal liquid;
S2, pour the hybrid metal liquid of gained in step S1 into hot rolls and carry out hot rolled coil operation, after annealing, obtain alloy rolled material;
S3, gained alloy rolled material in step S2 is undertaken being rolled into tubulose 3-4 time by roller press, be welded into double-layer alloy tubing by spot-welding gun;
S4, by the double-layer alloy tubing of gained in step S3 by withdrawal straightening machine and slitter, carry out successively straightening, slitting operation, then polished by Plane surface grinding machine, obtain air gap pipes finished product;
S5, by the air gap pipes finished product of step S4 gained, to be put in storage by test package.
In described step S1, smelting temperature is 1500 DEG C, and smelting time is 0.5h.
In described step S2, hot-rolled temperature is 800 DEG C, and the hot rolling time is 1h.
In described step S2, annealing temperature is 600 DEG C, and annealing speed is 9 ms/min.
In described step S3, roller press arranges 4 ~ 8 pressure rollers.
The present invention has excellent formability, solidity to corrosion, high temperature resistant, anti-oxidant good deep drawing quality, smooth in exhaust, pollution-free, energy-conserving and environment-protective, the characteristic that reduces costs, increase the service life, in current automotive material today to lightweight, energy-saving and environmental protection future development, there is wide development space; It is simple that the present invention makes working method flow process, and make stable, the vapor pipe made is respond well, and performance is good; Resistance toheat is good and cost is low.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. an automobile exhaust pipe, is characterized in that, comprises and being prepared from by the raw material of following weight part:
8 ~ 12 parts, carbon, 10 ~ 18 parts, manganese, sulphur 3 ~ 8 parts, copper 2 ~ 4 parts, 3 ~ 8 parts, aluminium, 3 ~ 7 parts, zinc, 20 ~ 32 parts, nickel, cobalt 4 ~ 8 parts, chromium 2 ~ 11 parts, vanadium 1 ~ 4 part, surplus are iron and inevitable impurity.
2. automobile exhaust pipe and preparation method thereof, is characterized in that, comprises the steps:
S1, take 8 ~ 12 parts, a certain amount of carbon, 10 ~ 18 parts, manganese, sulphur 3 ~ 8 parts, copper 2 ~ 4 parts, 3 ~ 8 parts, aluminium, 3 ~ 7 parts, zinc, 20 ~ 32 parts, nickel, cobalt 4 ~ 8 parts, chromium 2 ~ 11 parts, vanadium 1 ~ 4 part, surplus are iron and inevitably impurity is for subsequent use, in vacuum induction furnace, first add manganese, copper, aluminium, zinc and iron carry out heat melting formation solution, add carbon, sulphur, nickel, cobalt, chromium and vanadium again to carry out adding hot smelting, obtain hybrid metal liquid;
S2, pour the hybrid metal liquid of gained in step S1 into hot rolls and carry out hot rolled coil operation, after annealing, obtain alloy rolled material;
S3, gained alloy rolled material in step S2 is undertaken being rolled into tubulose 3-4 time by roller press, be welded into double-layer alloy tubing by spot-welding gun;
S4, by the double-layer alloy tubing of gained in step S3 by withdrawal straightening machine and slitter, carry out successively straightening, slitting operation, then polished by Plane surface grinding machine, obtain air gap pipes finished product;
S5, by the air gap pipes finished product of step S4 gained, to be put in storage by test package.
3. a kind of automobile exhaust pipe according to claim 2 and preparation method thereof, is characterized in that, in described step S1, smelting temperature is 1500 ~ 1800 DEG C, and smelting time is 0.5 ~ 1.5h.
4. a kind of automobile exhaust pipe according to claim 2 and preparation method thereof, is characterized in that, in described step S2, hot-rolled temperature is 800 ~ 1100 DEG C, and the hot rolling time is 1 ~ 2h.
5. a kind of automobile exhaust pipe according to claim 2 and preparation method thereof, is characterized in that, in described step S2, annealing temperature is 600 ~ 900 DEG C, and annealing speed is 9 ~ 10 ms/min.
6. a kind of automobile exhaust pipe according to claim 2 and preparation method thereof, is characterized in that, in described step S3, roller press arranges 4 ~ 8 pressure rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511012736.1A CN105525207A (en) | 2015-12-31 | 2015-12-31 | Automobile exhaust pipe and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511012736.1A CN105525207A (en) | 2015-12-31 | 2015-12-31 | Automobile exhaust pipe and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105525207A true CN105525207A (en) | 2016-04-27 |
Family
ID=55767726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511012736.1A Pending CN105525207A (en) | 2015-12-31 | 2015-12-31 | Automobile exhaust pipe and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105525207A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447171A (en) * | 2017-07-26 | 2017-12-08 | 莫小燕 | Automobile exhaust pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100203357A1 (en) * | 2007-07-31 | 2010-08-12 | Yoshiaki Hori | Al-plated steel sheet for exhaust gas passageway members of motorcycles excellent in high-temperature strength and the members |
| CN101949474A (en) * | 2010-02-05 | 2011-01-19 | 西峡县西泵特种铸造有限公司 | Heat-resistance stainless steel exhaust pipe and manufacturing method thereof |
| CN103290283A (en) * | 2013-06-24 | 2013-09-11 | 靖江市新程汽车零部件有限公司 | Thermal insulation board of automobile exhaust pipe and manufacturing method thereof |
-
2015
- 2015-12-31 CN CN201511012736.1A patent/CN105525207A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100203357A1 (en) * | 2007-07-31 | 2010-08-12 | Yoshiaki Hori | Al-plated steel sheet for exhaust gas passageway members of motorcycles excellent in high-temperature strength and the members |
| CN101949474A (en) * | 2010-02-05 | 2011-01-19 | 西峡县西泵特种铸造有限公司 | Heat-resistance stainless steel exhaust pipe and manufacturing method thereof |
| CN103290283A (en) * | 2013-06-24 | 2013-09-11 | 靖江市新程汽车零部件有限公司 | Thermal insulation board of automobile exhaust pipe and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447171A (en) * | 2017-07-26 | 2017-12-08 | 莫小燕 | Automobile exhaust pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101941021B (en) | Method for producing extra-deep drawing cold-rolled steel plate based on ASP process | |
| CN106269869A (en) | A kind of production method of Valve Steel 53Cr21Mn9Ni4N polishing bar | |
| CN106834913A (en) | The corrosion resistance weathering steel and its production method of RE-treated | |
| CN110117755B (en) | Preparation method of 980 MPa-grade cold-rolled medium manganese steel with low yield ratio | |
| CN111424150A (en) | SPHC hot-rolled pickled plate without transverse crease defect and production method thereof | |
| CN113817963A (en) | 1000 MPa-level low-welding-crack-sensitivity steel plate and production method thereof | |
| CN105568129A (en) | Rare earth carbon steel material for automobile exhaust pipe and preparation method thereof | |
| CN110317995A (en) | A method of with carbon hot rolled steel plate in the CSP production good thin gauge of surface quality | |
| CN101613827A (en) | A kind of high-performance cold rolled phase transformation plasticity steel and preparation method thereof | |
| CN103510001B (en) | A kind of double coiled welded tube cold-rolled steel sheet and production method thereof | |
| CN109881085A (en) | Easy welding hot-rolled strip Q345 and its manufacturing method based on double-roller rolling | |
| CN104018071A (en) | Q420E steel plate with low carbon equivalent and high toughness and production method of Q420E steel plate | |
| CN102886476A (en) | Method for forging cold roller blank | |
| CN102965575A (en) | Ultra-fast cooling preparation method of 355MPa ship plate steel | |
| CN105950972A (en) | Thick-specification X80 pipeline steel plate with process time being shortened and manufacturing method thereof | |
| CN105525207A (en) | Automobile exhaust pipe and preparation method thereof | |
| CN116083806A (en) | Cold heading steel hot rolled wire rod for delayed fracture resistant 14.9-grade quenched and tempered bolt and preparation method thereof | |
| CN111155027B (en) | Low-alloy high-strength seamless steel tube for rare earth-containing Q390 structure and preparation method thereof | |
| CN105543627A (en) | New material exhaust pipe and preparation method thereof | |
| CN104017971A (en) | Transverse cold rolling method for improving surface wrinkling of ferritic stainless steel | |
| CN113913671A (en) | High-temperature oxidation resistant cold-rolled steel plate for hot forming and production and manufacturing method thereof | |
| CN105673173B (en) | A kind of exhaust pipe and its processing preparation process of novel high-performance material | |
| CN102409252A (en) | Ultrahigh-strength cold-rolled steel plate and manufacturing method thereof | |
| CN113913696B (en) | 420MPa grade high-rise building steel plate and production method thereof | |
| CN102921721B (en) | Production method of ingot casting rolling cogging for steel for high load engine vent valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160427 |