CN106593608A - Gas outlet end assembly of exhaust system of automobile engine and production technology thereof - Google Patents

Abstract

The invention discloses a gas outlet end assembly of an exhaust system of an automobile engine. The gas outlet end assembly comprises a tapered tube body, an elbow and a connecting flange, wherein the tapered tube body is provided with a cavity from bottom to top; the elbow and the connecting flange are fixedly connected with the top of the tapered tube body; the elbow and the connecting flange communicate with the cavity; and the tapered tube body, the elbow and the connecting flange are manufactured into an integral body. A production technology comprises the steps of (I) smelting raw materials; (II) preparing a wax mold; (III) manufacturing a sand mold of a shell mold; (IV) carrying out dewaxing; (V), roasting the shell mold; (VI) forming the sand mold; (VII) shaving planes of the sand mold and a sand box, and punching air holes in the sand mold; (VIII) carrying out pouring; (IX) turning a casting formed through pouring; and (X) coating the turned casting with a metallic wear-resistant coating. According to the gas outlet end assembly of the exhaust system of the automobile engine, the tapered tube body, the elbow and the connecting flange are manufactured into an integral body, so that relative to traditional assembled exhaust tapered tubes, the tapered tube has the advantages of being higher in structural strength, more stable in working and longer in service life.

Description

A kind of automobile engine exhaust system outlet side assembly and its production technology

Technical field

The present invention relates to a kind of automobile engine exhaust system outlet side assembly and its production technology, belong to auto parts machinery skill Art field.

Background technology

Automobile engine to exhaust Taper Pipe is the important component part of automobile exhaust system, and material is 304 stainless steel round bar, pipe Material, the workpiece is the carrier for connecting turbocharger and ternary catalyzing unit, it is desirable to ne-leakage, resistant to elevated temperatures performance requirement, specifically Index is：

（1）0.2MPa pressurizes, and 1 minute non-leakage；

（2）High temperature resistant more than 750；Former foreign customers design, by exhaust Taper Pipe seven parts are divided into, and each parts are adopted respectively After taking punching press, stretching, bend pipe, machining, Combination Welding is formed.Operation is more, and cost of manufacture is high, due to being vented Taper Pipe product knot Structure tends to complicated, during Combination Welding, it is difficult to ensure that the position of related features and dimensional requirement between each parts, and each zero The sealing property of part weld is difficult to ensure that.

The content of the invention

The technical problem to be solved in the present invention is, not enough for prior art, proposes a kind of integrally formed car engine Machine gas extraction system outlet side assembly and its production technology.

The present invention is that the technical scheme for solving above-mentioned technical problem proposition is：A kind of automobile engine exhaust system outlet side Assembly, including Taper Pipe body, elbow and adpting flange, Taper Pipe body is bottom-up to be formed with cavity, and elbow and adpting flange are distinguished Affixed with Taper Pipe bodies top, elbow and adpting flange are connected respectively with cavity, and Taper Pipe body, elbow and adpting flange are made as one Body；

The mass percent of each composition is in automobile engine to exhaust Taper Pipe：

C：0.02-0.03%, Al:0.56-0.83%,Zn:0.63-0.94%,Si：0.11-0.18%, Mn：0.77-0.88%, S：≤ 0.030%, P：≤ 0.030%, Cr：0.02-0.04%, Ni：0.44-0.49%, Cu：0.15-0.19%, V：0.05-0.08%, Mo： 0.16-0.19%, Ti：0.77-0.89%, B：0.01-0.02%, Pd：0.02-0.04%,Pt：0.26-0.39%,W：0.33- 0.46%,Ta：0.01-0.02%,Nd：0.03-0.07%,Ce：0.01-0.02%,

Eu：0.11-0.14%,Lu:0.04-0.09%, Au：0.15-0.21%, Ag:0.42-0.54%, Ga：0.01-0.02%, Y： 0.12-0.17%, Sn：0.54-0.67%, Zr：0.06-0.11%, Re：0.02-0.05%, Bi：0.11-0.14%,

Calcium oxide：0.12-0.15%, magnesia：0.13-0.15%, cupric oxide：0.11-0.18%, iron oxide：0.15- 0.21%, manganese dioxide：0.06-0.14%, Kocide SD：0.14-0.18%, iron hydroxide：0.05-0.09%, hydroxide Calcium：0.06-0.08%, balance of Fe；

The production technology of automobile engine to exhaust Taper Pipe is comprised the following steps：

(i) melting raw material：

A, add raw materials in smelting furnace by the mass percent of each composition in predetermined automobile engine to exhaust Taper Pipe, by smelting furnace Temperature bring up to 1550 degrees Celsius to 1580 degrees Celsius, raw material is smelted to form alloy solution；

B, alloy solution obtained in the previous step is cooled down, water-cooled is combined with air cooling during cooling, first adopts water-cooled with 30-32 DEG C/alloy solution water-cooled to 410-420 DEG C of formation alloy, is then air cooled to 310-320 DEG C by the cooldown rate of s, then using water The cold cooldown rate with 13-15 DEG C/s is by alloy water-cooled to room temperature；

C, heating, the alloy after previous step is cooled down is added in smelting furnace and carries out secondary smelting, and the temperature in smelting furnace is brought up to 1590 degrees Celsius to 1620 degrees Celsius, alloy forms alloy solution by secondary smelting；

D, boiling hot bag, pour the alloy solution in smelting furnace into casting ladle, carry out scalding bag；

After e, boiling hot bag are finished, the alloy solution in casting ladle is poured in electric furnace, the temperature in electric furnace is warming up to into 1630 degrees Celsius To 1640 degrees Celsius, heat 5 minutes to 8 minutes, pour the alloy solution in electric furnace into casting ladle, ladle-to-ladle cooling；

F, it is ladle-to-ladle after, pour the alloy solution in casting ladle into electric furnace, temperature is down to 1480 to 1510 degrees Celsius, casting ladle bag cheat In sequentially add 1.4% to 1.5% nodulizer and 0.2% to 0.3% inovulant, be covered in nodulizer, inovulant with sheet metal On, and consolidate, steel-sheet thickness is 0.5mm to 1mm；

G, the opposite side that the alloy solution in electric furnace is poured into casting ladle indent, spheroidizing reacion 50s to 65s, after spheroidizing reacion is abundant, The slag agent of one layer of collection is spread, is quickly skimmed；

H, quickly skim after, be sprinkled into swelling perlite powder on alloy solution surface immediately, twice of slag hitting after the completion of slag hitting, is formed Alloy solution to be cast, was poured in five minutes；

(ii) prepared by wax-pattern：Using low-temperature wax and mechanical casting technology, make consistent simultaneously with automobile engine to exhaust Taper Pipe cast member Include the wax-pattern of insulated feeder, and wax-pattern is repaired, afterwards wax-pattern is cleaned using wax base cleaning agent；

(iii) shell model sand mold is made in step (ii) obtained wax-pattern：The step is comprised the steps of：

A, wax-pattern place insulated feeder position on, with EVA adhesive film cover place insulated feeder surface, in case the surface is received To pollution；

B, it is coated with the first surface layer in wax pattern surface：

First, slurries are prepared in wax pattern surface dip-coating zirconium powder and silica sol binder, the viscosity number of the slurries is in the 52-56 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the zircon sand of 150 mesh, after floating sand EVA glue should be cleared up Residual slurry and zircon sand on film；

3rd, the wax-pattern after artificial floating sand is spontaneously dried, drying time is 18-20 hours；

C, it is coated with the second transition zone in wax pattern surface obtained in step B：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step B, the slurries it is viscous Angle value is in the 41-45 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the Malaysia sand of 65-80 mesh, should be cleared up after floating sand Residual slurry and Malaysia sand in EVA adhesive film；

3rd, the wax-pattern after artificial floating sand is put in vacuum drying chamber and is dried, the temperature controlled in vacuum drying chamber is 45-55 degree Celsius, it is 110-130Pa to control the air pressure in vacuum drying chamber, and drying time is 11-13 hours；

D, it is coated with the 3rd back-up coat in wax pattern surface obtained in step C：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step C, the slurries it is viscous Angle value is in the 22-25 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the Malaysia sand of 15-20 mesh, should be cleared up after floating sand Residual slurry and Malaysia sand in EVA adhesive film；

3rd, wax-pattern is put in vacuum drying chamber and is dried, it is 58-68 degree Celsius to control the temperature in vacuum drying chamber, It is 65-95Pa to control the air pressure in vacuum drying chamber, and drying time is 12-15 hours；

E, it is coated with the 4th slurry seal layer in wax pattern surface obtained in step D：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step D, the slurries it is viscous Angle value is in the 8-12 seconds；

Then, the residual slurry cleared up in EVA adhesive film；

3rd, the wax-pattern after artificial floating sand is put under the wind speed of 1.1-1.2 meter per seconds and is dried, drying time is that 12-36 is little When；

(iv) dewax：Using steam dewaxing, the pressure of steam is 0.6MPa, and the time is 18-55 minutes, and should first by insulation before dewaxing The EVA adhesive film at rising head position is removed, and shell mould is obtained；

(v) shell mould roasting；

During (vi) the (v) roasting shell mould of step to be put into the sandbox prepared by formative technology, blend compounds band is sealed to be used on the shell mould The cast gate and insulated feeder of cast, is then placed in the mixed sand through preparing, and pile after mixed sand is carried out again with foundry jolter Ram-jolt, forms sand mold；

(vii) the sand mold after step (vi) ram-jolt and sandbox plane are struck off, and a core are pricked at interval of 15cm in mould surface, The core is pricked to from model surface 3-5cm；

(viii) pour into a mould

Pouring into a mould the air-heater of front 400-420 degree Celsius of constant temperature carries out baking 1 hour to shell mould, and during cast, pouring temperature is 1550-1650 degree Celsius, after cast, foundry goods is incubated 2-3 hours in sand mold；After moulding by casting, the demoulding is carried out, crushes shell mould, The insulated feeder of excision foundry goods, obtains foundry goods；

(ix) the foundry goods after moulding by casting is machined；

(x) by the foundry goods coating abrasion-resistant metal coating after Vehicle Processing, concrete technology is：

A, dispensing：The component of the abrasion-resistant metal coating is by mass percentage：Carbon：0.12-0.15%, boron：0.13-0.16%, Chromium：5.2-5.4%, titanium：2.1-2.6%, vanadium：1.3-1.8%, cobalt：0.33-0.65%, niobium：0.13-0.25%, calcium：0.52- 0.67%, barium：0.11-0.17%, tungsten：0.64-0.77%, zinc：2.3-2.6%, samarium：1.1-1.4%, neodymium：3.2-3.7%, promethium： 0.12-0.15%, europium：0.29-0.34%, gadolinium：1.2-1.5%, aluminium：3.21-4.28%, auxiliary agent：5.1-5.4%, balance of iron；

The component of the auxiliary agent is calculated by weight as：Zircon：8-11 parts, kaolinite：16-18 parts, graphite powder：12-14 parts, Copper powder：11-13 parts, nickel powder：12-16 parts, aluminium powder：10-14 parts；

B, carbon, boron, chromium, titanium, vanadium, cobalt, niobium, calcium, barium and ferro element are put in smelting furnace, then furnace temperature are risen to into 520-530 After DEG C, 1.5-2 hours are incubated, then temperature are risen to into 1350-1360 DEG C, be put into tungsten, zinc, samarium, neodymium, promethium, europium, gadolinium, aluminium element, Stir, be incubated 2-6 hours, then water-cooled is to 350-360 DEG C, then is air cooled to room temperature；

C, melting furnace temperature is increased to 1520-1530 DEG C, and be put into auxiliary agent, be incubated 4-7h, then whole nitrogen flushing gas agitating will Temperature is reduced to 670-680 DEG C；Then water-cooled is cooled to 320-330 DEG C with the speed of 18-25 DEG C/s, is then air cooled to room temperature；

D, the metal that step c is obtained is put in ball mill, temperature is increased to into 320-350 DEG C, be incubated 1-3 hours, Ran Houqi Dynamic ball mill milling, then temperature is increased to into 620-630 DEG C, 1-2 hours are incubated, 350-360 DEG C is being reduced to, crush, cross 100 Mesh sieve, obtains powder particle A；

E, the surface that the powder particle A in step d is sprayed into foundry goods, and thickness are 0.5-2mm, then with 15-20 DEG C/min Speed be heated to 650-670 DEG C, be incubated 1-2 hours, then temperature is protected with air-cooled to 220-250 DEG C of the speed of 5-8 DEG C/min Warm 1-2 hours, are air cooled to room temperature, and final automobile engine to exhaust Taper Pipe is obtained.

The improvement of above-mentioned technical proposal is：At least one contiguous block is provided with elbow, link slot is offered on contiguous block.

The improvement of above-mentioned technical proposal is：Elbow is formed with bulge loop away from one end of Taper Pipe body.

The improvement of above-mentioned technical proposal is：Adpting flange is connected with straight up limited block.

The improvement of above-mentioned technical proposal is：The first deep floor is formed between limited block and Taper Pipe body.

The improvement of above-mentioned technical proposal is：The connection end of adpting flange is horizontally outward extended with least one boss, boss On offer through hole.

The improvement of above-mentioned technical proposal is：The second deep floor is formed between boss and Taper Pipe body.

The improvement of above-mentioned technical proposal is：The mass percent of each composition is in automobile engine to exhaust Taper Pipe：

C：0.02%, Al:0.58%,Zn:0.66%,Si：0.12%, Mn：0.79%, S：≤ 0.030%, P：≤ 0.030%, Cr： 0.02%, Ni：0.45%, Cu：0.16%, V：0.05%, Mo：0.16%, Ti：0.78%, B：0.01%, Pd：0.02%,Pt：0.26%, W：0.34%,Ta：0.01%,Nd：0.03%,Ce：0.01%,Eu：0.11%,Lu:0.04%, Au：0.15%, Ag:0.43%, Ga： 0.01%, Y：0.14%, Sn：0.56%, Zr：0.07%, Re：0.03%, Bi：0.12%,

Calcium oxide：0.13%, magnesia：0.14%, cupric oxide：0.12%, iron oxide：0.16%, manganese dioxide：0.08%, Kocide SD：0.16%, iron hydroxide：0.06%, calcium hydroxide：0.07%, balance of Fe.

The improvement of above-mentioned technical proposal is：The mass percent of each composition is in automobile engine to exhaust Taper Pipe：

C：0.03%, Al:0.81%,Zn:0.92%,Si：0.18%, Mn：0.84%, S：≤ 0.030%, P：≤ 0.030%, Cr： 0.04%, Ni：0.47%, Cu：0.17%, V：0.07%, Mo：0.19%, Ti：0.83%, B：0.01%, Pd：0.02%,Pt：0.37%, W：0.43%,Ta：0.01%,Nd：0.03%,Ce：0.01%,Eu：0.13%,Lu:0.06%, Au：0.17%, Ag:0.51%, Ga： 0.01%, Y：0.16%, Sn：0.66%, Zr：0.08%, Re：0.03%, Bi：0.12%,

Calcium oxide：0.13%, magnesia：0.15%, cupric oxide：0.17%, iron oxide：0.19%, manganese dioxide：0.14%, Kocide SD：0.16%, iron hydroxide：0.07%, calcium hydroxide：0.07%, balance of Fe.

The present invention is using the beneficial effect of above-mentioned technical proposal：

（1）The automobile engine to exhaust Taper Pipe of the present invention is made as one due to Taper Pipe body, elbow and adpting flange, relative to biography The fabricated exhaust Taper Pipe of system, structural strength is higher, and work more stable, long service life；

（2）The automobile engine to exhaust Taper Pipe of the present invention is opened up due to being provided with least one contiguous block on elbow on contiguous block There is link slot, can be fixed at elbow by contiguous block when mounted, elbow produces dither noise when preventing engine from working；

（3）The automobile engine to exhaust Taper Pipe of the present invention is formed with bulge loop due to elbow away from one end of Taper Pipe body, when mounted Can connect convenient firm with the pipe joint clamping positioning docked；

（4）The automobile engine to exhaust Taper Pipe of the present invention is connected with straight up limited block due to adpting flange, there is provided effectively Positioning, facilitates the alignment of flange, installation effectiveness when improving method downlink connection and causes connection more firm；

（5）The automobile engine to exhaust Taper Pipe of the present invention due to being formed with the first deep floor between limited block and Taper Pipe body, the One deep floor strengthens the bonding strength between limited block and Taper Pipe body, extends service life；

（6）The automobile engine to exhaust Taper Pipe of the present invention due to being formed with the second deep floor between boss and Taper Pipe body, second Deep floor strengthens the bonding strength between boss and Taper Pipe body, extends service life；

（7）The automobile engine to exhaust Taper Pipe of the present invention strengthens automobile engine to exhaust due to containing Zn, Ni and W in raw material The heat-resisting and decay resistance of Taper Pipe；

（8）The automobile engine to exhaust Taper Pipe of the present invention in raw material due to, containing Ti, Al and rare earth element, alleviating car engine Machine is vented the quality of Taper Pipe, increased structural strength and decay resistance；

（9）The automobile engine to exhaust Taper Pipe of the present invention is due in raw material melting, by boiling hot bag, ladle-to-ladle, spheroidizing reacion, skimming With the cooperation of slag hitting so that raw material melting is more thorough, the impurity in raw material can be effectively removed, improve casting quality；

（10）In the automobile engine to exhaust Taper Pipe production of the present invention, when shell model sand mold is made, cover placement with EVA adhesive film and protect The surface of warm rising head, can effectively prevent that the surface is contaminated, and relative to tradition the method with sword iron plate is placed, and use EVA adhesive film The rising head of suitable all size, convenient efficient, cost is lower；

（11）In the automobile engine to exhaust Taper Pipe production of the present invention, when shell model sand mold is made, applied successively by four layers of slurry seal Cover, the shell mould accurate size of making, error is little, and intensity is high, reduces unexpected broken probability；

（12）In the automobile engine to exhaust Taper Pipe production of the present invention, the foundry goods after Vehicle Processing is covered into abrasion-resistant metal coating, entered One step improves the heat-resisting and decay resistance of automobile engine to exhaust Taper Pipe, and with it is wear-resisting the characteristics of.

Description of the drawings

Below in conjunction with the accompanying drawings the invention will be further described：

Fig. 1 is the front view of embodiment of the present invention automobile engine to exhaust Taper Pipe；

Fig. 2 is sectional view at the A-A of embodiment of the present invention automobile engine to exhaust Taper Pipe；

Fig. 3 is the top view of embodiment of the present invention automobile engine to exhaust Taper Pipe；

Wherein：1- Taper Pipe bodies；2- adpting flanges；3- boss；4- through holes；5- limited blocks；6- elbows；The deep floors of 7- first； 8- contiguous blocks；9- link slots；10- bulge loops；The deep floors of 11- second.

Specific embodiment

Embodiment one

The automobile engine to exhaust Taper Pipe of the present embodiment, as shown in Figure 1,2 and 3, including Taper Pipe body 1, elbow 6 and adpting flange 2, Taper Pipe body 1 is bottom-up to be formed with cavity, and elbow 6 and adpting flange 2 are affixed with the top of Taper Pipe body 1 respectively, elbow 6 and even Acting flange 2 is connected respectively with cavity, and Taper Pipe body 1, elbow 6 and adpting flange 2 are made as one；A company is provided with elbow 6 Block 8 is connect, link slot 9 is offered on contiguous block 8.Elbow 6 is formed with bulge loop 10 away from one end of Taper Pipe body 1.Adpting flange 2 is vertical Limited block 5 is connected with upwards.The first deep floor 7 is formed between limited block 5 and Taper Pipe body 1.The connection end water of adpting flange 2 Flat to be outward extended with boss 3, boss 3 has four, through hole 4 is offered on boss 3.Second is formed between boss 3 and Taper Pipe body 1 Deep floor 11.

The mass percent of each composition is in automobile engine to exhaust Taper Pipe：C：0.02%, Al:0.58%,Zn:0.66%, Si：0.12%, Mn：0.79%, S：≤ 0.030%, P：≤ 0.030%, Cr：0.02%, Ni：0.45%, Cu：0.16%, V：0.05%, Mo：0.16%, Ti：0.78%, B：0.01%, Pd：0.02%,Pt：0.26%,W：0.34%,Ta：0.01%,Nd：0.03%,Ce： 0.01%,Eu：0.11%,Lu:0.04%, Au：0.15%, Ag:0.43%, Ga：0.01%, Y：0.14%, Sn：0.56%, Zr：0.07%, Re：0.03%, Bi：0.12%, calcium oxide：0.13%, magnesia：0.14%, cupric oxide：0.12%, iron oxide：0.16%, two Manganese oxide：0.08%, Kocide SD：0.16%, iron hydroxide：0.06%, calcium hydroxide：0.07%, balance of Fe；

The production technology of automobile engine to exhaust Taper Pipe is comprised the following steps：

(i) melting raw material：

A, add raw materials in smelting furnace by the mass percent of each composition in predetermined automobile engine to exhaust Taper Pipe, by smelting furnace Temperature bring up to 1550 degrees Celsius to 1580 degrees Celsius, raw material is smelted to form alloy solution；

B, alloy solution obtained in the previous step is cooled down, water-cooled is combined with air cooling during cooling, first adopts water-cooled with 30-32 DEG C/alloy solution water-cooled to 410-420 DEG C of formation alloy, is then air cooled to 310-320 DEG C by the cooldown rate of s, then using water The cold cooldown rate with 13-15 DEG C/s is by alloy water-cooled to room temperature；

C, heating, the alloy after previous step is cooled down is added in smelting furnace and carries out secondary smelting, and the temperature in smelting furnace is brought up to 1590 degrees Celsius to 1620 degrees Celsius, alloy forms alloy solution by secondary smelting；

D, boiling hot bag, pour the alloy solution in smelting furnace into casting ladle, carry out scalding bag；

After e, boiling hot bag are finished, the alloy solution in casting ladle is poured in electric furnace, the temperature in electric furnace is warming up to into 1630 degrees Celsius To 1640 degrees Celsius, heat 5 minutes to 8 minutes, pour the alloy solution in electric furnace into casting ladle, ladle-to-ladle cooling；

F, it is ladle-to-ladle after, pour the alloy solution in casting ladle into electric furnace, temperature is down to 1480 to 1510 degrees Celsius, casting ladle bag cheat In sequentially add 1.4% to 1.5% nodulizer and 0.2% to 0.3% inovulant, be covered in nodulizer, inovulant with sheet metal On, and consolidate, steel-sheet thickness is 0.5mm to 1mm；

G, the opposite side that the alloy solution in electric furnace is poured into casting ladle indent, spheroidizing reacion 50s to 65s, after spheroidizing reacion is abundant, The slag agent of one layer of collection is spread, is quickly skimmed；

H, quickly skim after, be sprinkled into swelling perlite powder on alloy solution surface immediately, twice of slag hitting after the completion of slag hitting, is formed Alloy solution to be cast, was poured in five minutes；

(ii) prepared by wax-pattern：Using low-temperature wax and mechanical casting technology, make consistent simultaneously with automobile engine to exhaust Taper Pipe cast member Include the wax-pattern of insulated feeder, and wax-pattern is repaired, afterwards wax-pattern is cleaned using wax base cleaning agent；

(iii) shell model sand mold is made in step (ii) obtained wax-pattern：The step is comprised the steps of：

A, wax-pattern place insulated feeder position on, with EVA adhesive film cover place insulated feeder surface, in case the surface is received To pollution；

B, it is coated with the first surface layer in wax pattern surface：

First, slurries are prepared in wax pattern surface dip-coating zirconium powder and silica sol binder, the viscosity number of the slurries was at 52～56 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the zircon sand of 150 mesh, after floating sand EVA glue should be cleared up Residual slurry and zircon sand on film；

3rd, the wax-pattern after artificial floating sand is spontaneously dried, drying time is 18～20 hours；

C, it is coated with the second transition zone in wax pattern surface obtained in step B：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step B, the slurries it is viscous Angle value was at 41～45 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the Malaysia sand of 65～80 mesh, should be cleared up after floating sand Residual slurry and Malaysia sand in EVA adhesive film；

3rd, the wax-pattern after artificial floating sand is put in vacuum drying chamber and is dried, the temperature controlled in vacuum drying chamber is 45～55 degrees Celsius, it is 110～130Pa to control the air pressure in vacuum drying chamber, and drying time is 11～13 hours；

D, it is coated with the 3rd back-up coat in wax pattern surface obtained in step C：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step C, the slurries it is viscous Angle value was at 22～25 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the Malaysia sand of 15～20 mesh, should be cleared up after floating sand Residual slurry and Malaysia sand in EVA adhesive film；

3rd, wax-pattern is put in vacuum drying chamber and is dried, it is 58～68 degrees Celsius to control the temperature in vacuum drying chamber, It is 65～95Pa to control the air pressure in vacuum drying chamber, and drying time is 12～15 hours；

E, it is coated with the 4th slurry seal layer in wax pattern surface obtained in step D：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step D, the slurries it is viscous Angle value was at 8～12 seconds；

Then, the residual slurry cleared up in EVA adhesive film；

3rd, the wax-pattern after artificial floating sand is put under the wind speed of 1.1～1.2 meter per seconds and is dried, drying time is 12～36 Hour；

(iv) dewax：Using steam dewaxing, the pressure of steam is 0.6MPa, and the time is 18～55 minutes, and first will should be protected before dewaxing The EVA adhesive film at warm rising head position is removed, and shell mould is obtained；

(v) shell mould roasting；

During (vi) the (v) roasting shell mould of step to be put into the sandbox prepared by formative technology, blend compounds band is sealed to be used on the shell mould The cast gate and insulated feeder of cast, is then placed in the mixed sand through preparing, and pile after mixed sand is carried out again with foundry jolter Ram-jolt, forms sand mold；

(vii) the sand mold after step (vi) ram-jolt and sandbox plane are struck off, and a core are pricked at interval of 15cm in mould surface, The core is pricked to from 3～5cm of model surface；

(viii) pour into a mould

Pouring into a mould the air-heater of front 400～420 degrees Celsius of constant temperature carries out baking 1 hour to shell mould, and during cast, pouring temperature is 1550～1650 degrees Celsius, after cast, foundry goods is incubated 2～3 hours in sand mold；After moulding by casting, the demoulding is carried out, crush shell Mould, cuts off the insulated feeder of foundry goods, obtains foundry goods；

(ix) the foundry goods after moulding by casting is machined；

(x) by the foundry goods coating abrasion-resistant metal coating after Vehicle Processing, concrete technology is：

A, dispensing：The component of the abrasion-resistant metal coating is by mass percentage：Carbon：0.12-0.15%, boron：0.13-0.16%, Chromium：5.2-5.4%, titanium：2.1-2.6%, vanadium：1.3-1.8%, cobalt：0.33-0.65%, niobium：0.13-0.25%, calcium：0.52- 0.67%, barium：0.11-0.17%, tungsten：0.64-0.77%, zinc：2.3-2.6%, samarium：1.1-1.4%, neodymium：3.2-3.7%, promethium： 0.12-0.15%, europium：0.29-0.34%, gadolinium：1.2-1.5%, aluminium：3.21-4.28%, auxiliary agent：5.1-5.4%, balance of iron；

The component of the auxiliary agent is calculated by weight as：Zircon：8-11 parts, kaolinite：16-18 parts, graphite powder：12-14 parts, Copper powder：11-13 parts, nickel powder：12-16 parts, aluminium powder：10-14 parts；

B, carbon, boron, chromium, titanium, vanadium, cobalt, niobium, calcium, barium and ferro element are put in smelting furnace, then furnace temperature are risen to into 520-530 After DEG C, 1.5-2 hours are incubated, then temperature are risen to into 1350-1360 DEG C, be put into tungsten, zinc, samarium, neodymium, promethium, europium, gadolinium, aluminium element, Stir, be incubated 2-6 hours, then water-cooled is to 350-360 DEG C, then is air cooled to room temperature；

C, melting furnace temperature is increased to 1520-1530 DEG C, and be put into auxiliary agent, be incubated 4-7h, then whole nitrogen flushing gas agitating will Temperature is reduced to 670-680 DEG C；Then water-cooled is cooled to 320-330 DEG C with the speed of 18-25 DEG C/s, is then air cooled to room temperature；

D, the metal that step c is obtained is put in ball mill, temperature is increased to into 320-350 DEG C, be incubated 1-3 hours, Ran Houqi Dynamic ball mill milling, then temperature is increased to into 620-630 DEG C, 1-2 hours are incubated, 350-360 DEG C is being reduced to, crush, cross 100 Mesh sieve, obtains powder particle A；

E, the surface that the powder particle A in step d is sprayed into foundry goods, and thickness are 0.5-2mm, then with 15-20 DEG C/min Speed be heated to 650-670 DEG C, be incubated 1-2 hours, then temperature is protected with air-cooled to 220-250 DEG C of the speed of 5-8 DEG C/min Warm 1-2 hours, are air cooled to room temperature, and final automobile engine to exhaust Taper Pipe is obtained.

Embodiment two

The automobile engine to exhaust Taper Pipe of the present embodiment, including Taper Pipe body 1, elbow 6 and adpting flange 2, Taper Pipe body 1 is under Be formed with cavity upwards, elbow 6 and adpting flange 2 are affixed with the top of Taper Pipe body 1 respectively, elbow 6 and adpting flange 2 respectively with sky Chamber connects, and Taper Pipe body 1, elbow 6 and adpting flange 2 are made as one；A contiguous block 8 is provided with elbow 6, on contiguous block 8 Offer link slot 9.Elbow 6 is formed with bulge loop 10 away from one end of Taper Pipe body 1.The affixed limited location straight up of adpting flange 2 Block 5.The first deep floor 7 is formed between limited block 5 and Taper Pipe body 1.The connection end of adpting flange 2 is horizontally outward extended with convex Platform 3, boss 3 has four, and through hole 4 is offered on boss 3.The second deep floor 11 is formed between boss 3 and Taper Pipe body 1.

The mass percent of each composition is in automobile engine to exhaust Taper Pipe：C：0.03%, Al:0.81%,Zn:0.92%, Si：0.18%, Mn：0.84%, S：≤ 0.030%, P：≤ 0.030%, Cr：0.04%, Ni：0.47%, Cu：0.17%, V：0.07%, Mo：0.19%, Ti：0.83%, B：0.01%, Pd：0.02%,Pt：0.37%,W：0.43%,Ta：0.01%,Nd：0.03%,Ce： 0.01%,Eu：0.13%,Lu:0.06%, Au：0.17%, Ag:0.51%, Ga：0.01%, Y：0.16%, Sn：0.66%, Zr：0.08%, Re：0.03%, Bi：0.12%, calcium oxide：0.13%, magnesia：0.15%, cupric oxide：0.17%, iron oxide：0.19%, two Manganese oxide：0.14%, Kocide SD：0.16%, iron hydroxide：0.07%, calcium hydroxide：0.07%, balance of Fe；

The production technology of automobile engine to exhaust Taper Pipe is comprised the following steps：

(i) melting raw material：

A, add raw materials in smelting furnace by the mass percent of each composition in predetermined automobile engine to exhaust Taper Pipe, by smelting furnace Temperature bring up to 1550 degrees Celsius to 1580 degrees Celsius, raw material is smelted to form alloy solution；

B, alloy solution obtained in the previous step is cooled down, water-cooled is combined with air cooling during cooling, first adopts water-cooled with 30-32 DEG C/alloy solution water-cooled to 410-420 DEG C of formation alloy, is then air cooled to 310-320 DEG C by the cooldown rate of s, then using water The cold cooldown rate with 13-15 DEG C/s is by alloy water-cooled to room temperature；

C, heating, the alloy after previous step is cooled down is added in smelting furnace and carries out secondary smelting, and the temperature in smelting furnace is brought up to 1590 degrees Celsius to 1620 degrees Celsius, alloy forms alloy solution by secondary smelting；

D, boiling hot bag, pour the alloy solution in smelting furnace into casting ladle, carry out scalding bag；

After e, boiling hot bag are finished, the alloy solution in casting ladle is poured in electric furnace, the temperature in electric furnace is warming up to into 1630 degrees Celsius To 1640 degrees Celsius, heat 5 minutes to 8 minutes, pour the alloy solution in electric furnace into casting ladle, ladle-to-ladle cooling；

F, it is ladle-to-ladle after, pour the alloy solution in casting ladle into electric furnace, temperature is down to 1480 to 1510 degrees Celsius, casting ladle bag cheat In sequentially add 1.4% to 1.5% nodulizer and 0.2% to 0.3% inovulant, be covered in nodulizer, inovulant with sheet metal On, and consolidate, steel-sheet thickness is 0.5mm to 1mm；

G, the opposite side that the alloy solution in electric furnace is poured into casting ladle indent, spheroidizing reacion 50s to 65s, after spheroidizing reacion is abundant, The slag agent of one layer of collection is spread, is quickly skimmed；

H, quickly skim after, be sprinkled into swelling perlite powder on alloy solution surface immediately, twice of slag hitting after the completion of slag hitting, is formed Alloy solution to be cast, was poured in five minutes；

(ii) prepared by wax-pattern：Using low-temperature wax and mechanical casting technology, make consistent simultaneously with automobile engine to exhaust Taper Pipe cast member Include the wax-pattern of insulated feeder, and wax-pattern is repaired, afterwards wax-pattern is cleaned using wax base cleaning agent；

(iii) shell model sand mold is made in step (ii) obtained wax-pattern：The step is comprised the steps of：

A, wax-pattern place insulated feeder position on, with EVA adhesive film cover place insulated feeder surface, in case the surface is received To pollution；

B, it is coated with the first surface layer in wax pattern surface：

First, slurries are prepared in wax pattern surface dip-coating zirconium powder and silica sol binder, the viscosity number of the slurries was at 52～56 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the zircon sand of 150 mesh, after floating sand EVA glue should be cleared up Residual slurry and zircon sand on film；

3rd, the wax-pattern after artificial floating sand is spontaneously dried, drying time is 18～20 hours；

C, it is coated with the second transition zone in wax pattern surface obtained in step B：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step B, the slurries it is viscous Angle value was at 41～45 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the Malaysia sand of 65～80 mesh, should be cleared up after floating sand Residual slurry and Malaysia sand in EVA adhesive film；

3rd, the wax-pattern after artificial floating sand is put in vacuum drying chamber and is dried, the temperature controlled in vacuum drying chamber is 45～55 degrees Celsius, it is 110～130Pa to control the air pressure in vacuum drying chamber, and drying time is 11～13 hours；

D, it is coated with the 3rd back-up coat in wax pattern surface obtained in step C：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step C, the slurries it is viscous Angle value was at 22～25 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the Malaysia sand of 15～20 mesh, should be cleared up after floating sand Residual slurry and Malaysia sand in EVA adhesive film；

3rd, wax-pattern is put in vacuum drying chamber and is dried, it is 58～68 degrees Celsius to control the temperature in vacuum drying chamber, It is 65～95Pa to control the air pressure in vacuum drying chamber, and drying time is 12～15 hours；

E, it is coated with the 4th slurry seal layer in wax pattern surface obtained in step D：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step D, the slurries it is viscous Angle value was at 8～12 seconds；

Then, the residual slurry cleared up in EVA adhesive film；

3rd, the wax-pattern after artificial floating sand is put under the wind speed of 1.1～1.2 meter per seconds and is dried, drying time is 12～36 Hour；

(iv) dewax：Using steam dewaxing, the pressure of steam is 0.6MPa, and the time is 18～55 minutes, and first will should be protected before dewaxing The EVA adhesive film at warm rising head position is removed, and shell mould is obtained；

(v) shell mould roasting；

During (vi) the (v) roasting shell mould of step to be put into the sandbox prepared by formative technology, blend compounds band is sealed to be used on the shell mould The cast gate and insulated feeder of cast, is then placed in the mixed sand through preparing, and pile after mixed sand is carried out again with foundry jolter Ram-jolt, forms sand mold；

(vii) the sand mold after step (vi) ram-jolt and sandbox plane are struck off, and a core are pricked at interval of 15cm in mould surface, The core is pricked to from 3～5cm of model surface；

(viii) pour into a mould

Pouring into a mould the air-heater of front 400～420 degrees Celsius of constant temperature carries out baking 1 hour to shell mould, and during cast, pouring temperature is 1550～1650 degrees Celsius, after cast, foundry goods is incubated 2～3 hours in sand mold；After moulding by casting, the demoulding is carried out, crush shell Mould, cuts off the insulated feeder of foundry goods, obtains foundry goods；

(ix) the foundry goods after moulding by casting is machined；

(x) by the foundry goods coating abrasion-resistant metal coating after Vehicle Processing, concrete technology is：

A, dispensing：The component of the abrasion-resistant metal coating is by mass percentage：Carbon：0.12-0.15%, boron：0.13-0.16%, Chromium：5.2-5.4%, titanium：2.1-2.6%, vanadium：1.3-1.8%, cobalt：0.33-0.65%, niobium：0.13-0.25%, calcium：0.52- 0.67%, barium：0.11-0.17%, tungsten：0.64-0.77%, zinc：2.3-2.6%, samarium：1.1-1.4%, neodymium：3.2-3.7%, promethium： 0.12-0.15%, europium：0.29-0.34%, gadolinium：1.2-1.5%, aluminium：3.21-4.28%, auxiliary agent：5.1-5.4%, balance of iron；

The component of the auxiliary agent is calculated by weight as：Zircon：8-11 parts, kaolinite：16-18 parts, graphite powder：12-14 parts, Copper powder：11-13 parts, nickel powder：12-16 parts, aluminium powder：10-14 parts；

B, carbon, boron, chromium, titanium, vanadium, cobalt, niobium, calcium, barium and ferro element are put in smelting furnace, then furnace temperature are risen to into 520-530 After DEG C, 1.5-2 hours are incubated, then temperature are risen to into 1350-1360 DEG C, be put into tungsten, zinc, samarium, neodymium, promethium, europium, gadolinium, aluminium element, Stir, be incubated 2-6 hours, then water-cooled is to 350-360 DEG C, then is air cooled to room temperature；

C, melting furnace temperature is increased to 1520-1530 DEG C, and be put into auxiliary agent, be incubated 4-7h, then whole nitrogen flushing gas agitating will Temperature is reduced to 670-680 DEG C；Then water-cooled is cooled to 320-330 DEG C with the speed of 18-25 DEG C/s, is then air cooled to room temperature；

D, the metal that step c is obtained is put in ball mill, temperature is increased to into 320-350 DEG C, be incubated 1-3 hours, Ran Houqi Dynamic ball mill milling, then temperature is increased to into 620-630 DEG C, 1-2 hours are incubated, 350-360 DEG C is being reduced to, crush, cross 100 Mesh sieve, obtains powder particle A；

E, the surface that the powder particle A in step d is sprayed into foundry goods, and thickness are 0.5-2mm, then with 15-20 DEG C/min Speed be heated to 650-670 DEG C, be incubated 1-2 hours, then temperature is protected with air-cooled to 220-250 DEG C of the speed of 5-8 DEG C/min Warm 1-2 hours, are air cooled to room temperature, and final automobile engine to exhaust Taper Pipe is obtained.

The present invention is not limited to above-described embodiment.The technical scheme that all employing equivalents are formed, all falling within the present invention will The protection domain asked.

Claims (9)

1. a kind of automobile engine exhaust system outlet side assembly, it is characterised in that：Including Taper Pipe body（1）, elbow（6）And even Acting flange（2）, the Taper Pipe body（1）It is bottom-up to be formed with cavity, the elbow（6）And adpting flange（2）Respectively with it is described Taper Pipe body（1）Affixed, the elbow in top（6）And adpting flange（2）Connect with the cavity respectively, the Taper Pipe body （1）, elbow（6）And adpting flange（2）It is made as one；

The mass percent of each composition is in the automobile engine to exhaust Taper Pipe：

C：0.02-0.03%, Al:0.56-0.83%,Zn:0.63-0.94%,Si：0.11-0.18%, Mn：0.77-0.88%, S：≤ 0.030%, P：≤ 0.030%, Cr：0.02-0.04%, Ni：0.44-0.49%, Cu：0.15-0.19%, V：0.05-0.08%, Mo： 0.16-0.19%, Ti：0.77-0.89%, B：0.01-0.02%, Pd：0.02-0.04%,Pt：0.26-0.39%,W：0.33- 0.46%,Ta：0.01-0.02%,Nd：0.03-0.07%,Ce：0.01-0.02%, Eu：0.11-0.14%,Lu:0.04-0.09%, Au：0.15-0.21%, Ag:0.42-0.54%, Ga：0.01-0.02%, Y：0.12-0.17%, Sn：0.54-0.67%, Zr：0.06- 0.11%, Re：0.02-0.05%, Bi：0.11-0.14%,

Calcium oxide：0.12-0.15%, magnesia：0.13-0.15%, cupric oxide：0.11-0.18%, iron oxide：0.15- 0.21%, manganese dioxide：0.06-0.14%, Kocide SD：0.14-0.18%, iron hydroxide：0.05-0.09%, hydroxide Calcium：0.06-0.08%, balance of Fe；

The production technology of the automobile engine to exhaust Taper Pipe is comprised the following steps：

(i) melting raw material：

A, add raw materials in smelting furnace by the mass percent of each composition in predetermined automobile engine to exhaust Taper Pipe, by smelting furnace Temperature bring up to 1550 degrees Celsius to 1580 degrees Celsius, raw material is smelted to form alloy solution；

B, alloy solution obtained in the previous step is cooled down, water-cooled is combined with air cooling during cooling, first adopts water-cooled with 30-32 DEG C/alloy solution water-cooled to 410-420 DEG C of formation alloy, is then air cooled to 310-320 DEG C by the cooldown rate of s, then using water The cold cooldown rate with 13-15 DEG C/s is by alloy water-cooled to room temperature；

C, heating, the alloy after previous step is cooled down is added in smelting furnace and carries out secondary smelting, and the temperature in smelting furnace is brought up to 1590 degrees Celsius to 1620 degrees Celsius, alloy forms alloy solution by secondary smelting；

D, boiling hot bag, pour the alloy solution in smelting furnace into casting ladle, carry out scalding bag；

After e, boiling hot bag are finished, the alloy solution in casting ladle is poured in electric furnace, the temperature in electric furnace is warming up to into 1630 degrees Celsius To 1640 degrees Celsius, heat 5 minutes to 8 minutes, pour the alloy solution in electric furnace into casting ladle, ladle-to-ladle cooling；

F, it is ladle-to-ladle after, pour the alloy solution in casting ladle into electric furnace, temperature is down to 1480 to 1510 degrees Celsius, casting ladle bag cheat In sequentially add 1.4% to 1.5% nodulizer and 0.2% to 0.3% inovulant, be covered in nodulizer, inovulant with sheet metal On, and consolidate, steel-sheet thickness is 0.5mm to 1mm；

G, the opposite side that the alloy solution in electric furnace is poured into casting ladle indent, spheroidizing reacion 50s to 65s, after spheroidizing reacion is abundant, The slag agent of one layer of collection is spread, is quickly skimmed；

H, quickly skim after, be sprinkled into swelling perlite powder on alloy solution surface immediately, twice of slag hitting after the completion of slag hitting, is formed Alloy solution to be cast, was poured in five minutes；

(ii) prepared by wax-pattern：Using low-temperature wax and mechanical casting technology, make consistent simultaneously with automobile engine to exhaust Taper Pipe cast member Include the wax-pattern of insulated feeder, and wax-pattern is repaired, afterwards wax-pattern is cleaned using wax base cleaning agent；

(iii) shell model sand mold is made in step (ii) obtained wax-pattern：The step is comprised the steps of：

A, wax-pattern place insulated feeder position on, with EVA adhesive film cover place insulated feeder surface, in case the surface is received To pollution；

B, it is coated with the first surface layer in wax pattern surface：

First, slurries are prepared in wax pattern surface dip-coating zirconium powder and silica sol binder, the viscosity number of the slurries is in the 52-56 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the zircon sand of 150 mesh, should be cleared up described after floating sand Residual slurry and zircon sand in EVA adhesive film；

3rd, the wax-pattern after artificial floating sand is spontaneously dried, drying time is 18-20 hours；

C, it is coated with the second transition zone in wax pattern surface obtained in step B：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step B, the slurries it is viscous Angle value is in the 41-45 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the Malaysia sand of 65-80 mesh, after floating sand institute should be cleared up State the residual slurry and Malaysia sand in EVA adhesive film；

3rd, the wax-pattern after artificial floating sand is put in vacuum drying chamber and is dried, the temperature controlled in vacuum drying chamber is 45-55 degree Celsius, it is 110-130Pa to control the air pressure in vacuum drying chamber, and drying time is 11-13 hours；

D, it is coated with the 3rd back-up coat in wax pattern surface obtained in step C：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step C, the slurries it is viscous Angle value is in the 22-25 seconds；

Then, sand is manually floated in the wax pattern surface through dip-coating slurries with the Malaysia sand of 15-20 mesh, after floating sand institute should be cleared up State the residual slurry and Malaysia sand in EVA adhesive film；

3rd, wax-pattern is put in vacuum drying chamber and is dried, it is 58-68 degree Celsius to control the temperature in vacuum drying chamber, It is 65-95Pa to control the air pressure in vacuum drying chamber, and drying time is 12-15 hours；

E, it is coated with the 4th slurry seal layer in wax pattern surface obtained in step D：

First, the slurries prepared with Malaysia powder and silica sol binder in wax pattern surface dip-coating obtained in step D, the slurries it is viscous Angle value is in the 8-12 seconds；

Then, the residual slurry cleared up in the EVA adhesive film；

3rd, the wax-pattern after artificial floating sand is put under the wind speed of 1.1-1.2 meter per seconds and is dried, drying time is that 12-36 is little When；

(iv) dewax：Using steam dewaxing, the pressure of steam is 0.6MPa, and the time is 18-55 minutes, and should first by insulation before dewaxing The EVA adhesive film at rising head position is removed, and shell mould is obtained；

(v) shell mould roasting；

During (vi) the (v) roasting shell mould of step to be put into the sandbox prepared by formative technology, blend compounds band is sealed to be used on the shell mould The cast gate and insulated feeder of cast, is then placed in the mixed sand through preparing, and pile after mixed sand is carried out again with foundry jolter Ram-jolt, forms sand mold；

(vii) the sand mold after step (vi) ram-jolt and sandbox plane are struck off, and a core are pricked at interval of 15cm in mould surface, The core is pricked to from model surface 3-5cm；

(viii) pour into a mould

Pouring into a mould the air-heater of front 400-420 degree Celsius of constant temperature carries out baking 1 hour to shell mould, and during cast, pouring temperature is 1550-1650 degree Celsius, after cast, foundry goods is incubated 2-3 hours in sand mold；After moulding by casting, the demoulding is carried out, crushes shell mould, The insulated feeder of excision foundry goods, obtains foundry goods；

(ix) the foundry goods after moulding by casting is machined；

(x) by the foundry goods coating abrasion-resistant metal coating after Vehicle Processing, concrete technology is：

A, dispensing：The component of the abrasion-resistant metal coating is by mass percentage：Carbon：0.12-0.15%, boron：0.13-0.16%, Chromium：5.2-5.4%, titanium：2.1-2.6%, vanadium：1.3-1.8%, cobalt：0.33-0.65%, niobium：0.13-0.25%, calcium：0.52- 0.67%, barium：0.11-0.17%, tungsten：0.64-0.77%, zinc：2.3-2.6%, samarium：1.1-1.4%, neodymium：3.2-3.7%, promethium： 0.12-0.15%, europium：0.29-0.34%, gadolinium：1.2-1.5%, aluminium：3.21-4.28%, auxiliary agent：5.1-5.4%, balance of iron；

The component of the auxiliary agent is calculated by weight as：Zircon：8-11 parts, kaolinite：16-18 parts, graphite powder：12-14 parts, Copper powder：11-13 parts, nickel powder：12-16 parts, aluminium powder：10-14 parts；

B, carbon, boron, chromium, titanium, vanadium, cobalt, niobium, calcium, barium and ferro element are put in smelting furnace, then furnace temperature are risen to into 520-530 After DEG C, 1.5-2 hours are incubated, then temperature are risen to into 1350-1360 DEG C, be put into tungsten, zinc, samarium, neodymium, promethium, europium, gadolinium, aluminium element, Stir, be incubated 2-6 hours, then water-cooled is to 350-360 DEG C, then is air cooled to room temperature；

C, melting furnace temperature is increased to 1520-1530 DEG C, and be put into auxiliary agent, be incubated 4-7h, then whole nitrogen flushing gas agitating will Temperature is reduced to 670-680 DEG C；Then water-cooled is cooled to 320-330 DEG C with the speed of 18-25 DEG C/s, is then air cooled to room temperature；

D, the metal that step c is obtained is put in ball mill, temperature is increased to into 320-350 DEG C, be incubated 1-3 hours, Ran Houqi Dynamic ball mill milling, then temperature is increased to into 620-630 DEG C, 1-2 hours are incubated, 350-360 DEG C is being reduced to, crush, cross 100 Mesh sieve, obtains powder particle A；

E, the surface that the powder particle A in step d is sprayed into foundry goods, and thickness are 0.5-2mm, then with 15-20 DEG C/min Speed be heated to 650-670 DEG C, be incubated 1-2 hours, then temperature is protected with air-cooled to 220-250 DEG C of the speed of 5-8 DEG C/min Warm 1-2 hours, are air cooled to room temperature, and final automobile engine to exhaust Taper Pipe is obtained.

2. automobile engine exhaust system outlet side according to claim 1 assembly, it is characterised in that：The elbow（6） On be provided with least one contiguous block（8）, on the contiguous block link slot is offered（9）.

3. automobile engine exhaust system outlet side according to claim 2 assembly, it is characterised in that：The elbow（6） Away from the Taper Pipe body（1）One end be formed with bulge loop（10）.

4. automobile engine exhaust system outlet side according to claim 3 assembly, it is characterised in that：The adpting flange （2）Limited block is connected with straight up（5）.

5. automobile engine exhaust system outlet side according to claim 4 assembly, it is characterised in that：The limited block （5）With the Taper Pipe body（1）Between be formed with the first deep floor（7）.

6. automobile engine exhaust system outlet side according to claim 5 assembly, it is characterised in that：The adpting flange Connection end be horizontally outward extended with least one boss（3）, the boss（3）On offer through hole（4）.

7. automobile engine exhaust system outlet side according to claim 6 assembly, it is characterised in that：The boss（3） The second deep floor is formed between the Taper Pipe body（11）.

8. automobile engine exhaust system outlet side according to claim 7 assembly, it is characterised in that：The car engine The mass percent of each composition is in machine exhaust Taper Pipe：

C：0.02%, Al:0.58%,Zn:0.66%,Si：0.12%, Mn：0.79%, S：≤ 0.030%, P：≤ 0.030%, Cr： 0.02%, Ni：0.45%, Cu：0.16%, V：0.05%, Mo：0.16%, Ti：0.78%, B：0.01%, Pd：0.02%,Pt：0.26%, W：0.34%,Ta：0.01%,Nd：0.03%,Ce：0.01%,Eu：0.11%,Lu:0.04%, Au：0.15%, Ag:0.43%, Ga： 0.01%, Y：0.14%, Sn：0.56%, Zr：0.07%, Re：0.03%, Bi：0.12%,

Calcium oxide：0.13%, magnesia：0.14%, cupric oxide：0.12%, iron oxide：0.16%, manganese dioxide：0.08%, Kocide SD：0.16%, iron hydroxide：0.06%, calcium hydroxide：0.07%, balance of Fe.

9. automobile engine exhaust system outlet side according to claim 7 assembly, it is characterised in that：The car engine The mass percent of each composition is in machine exhaust Taper Pipe：

C：0.03%, Al:0.81%,Zn:0.92%,Si：0.18%, Mn：0.84%, S：≤ 0.030%, P：≤ 0.030%, Cr： 0.04%, Ni：0.47%, Cu：0.17%, V：0.07%, Mo：0.19%, Ti：0.83%, B：0.01%, Pd：0.02%,Pt：0.37%, W：0.43%,Ta：0.01%,Nd：0.03%,Ce：0.01%,Eu：0.13%,Lu:0.06%, Au：0.17%, Ag:0.51%, Ga： 0.01%, Y：0.16%, Sn：0.66%, Zr：0.08%, Re：0.03%, Bi：0.12%,

Calcium oxide：0.13%, magnesia：0.15%, cupric oxide：0.17%, iron oxide：0.19%, manganese dioxide：0.14%, Kocide SD：0.16%, iron hydroxide：0.07%, calcium hydroxide：0.07%, balance of Fe.