CN106216955A - special steel transmission shaft tube manufacturing process - Google Patents
special steel transmission shaft tube manufacturing process Download PDFInfo
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- CN106216955A CN106216955A CN201610684720.3A CN201610684720A CN106216955A CN 106216955 A CN106216955 A CN 106216955A CN 201610684720 A CN201610684720 A CN 201610684720A CN 106216955 A CN106216955 A CN 106216955A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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Abstract
The present invention relates to a kind of special steel transmission shaft tube manufacturing process, it is characterised in that include the steps such as strip steel cutting, pickling processes, cold rolling, roll bending formation and welding, the process of weld seam sublimate, annealing, phosphatization, saponification process and cold-drawn process.The transmission shaft tube intensity of manufacturing process of the present invention processing is high, good toughness, and weld strength is high, still can keep higher obdurability after bearing bigger plastic deformation；90 degree and 0 degree flattening test of steel pipe reaches 1/2D weld seam flawless；Steel pipe tensile strength is more than 700Mpa；The test of steel pipe residual stress, less than 15mm, meets power transmission shaft dynamic balancing index.
Description
Technical field
The present invention relates to a kind of special steel transmission shaft tube manufacturing process, belong to metal material processing technical field.
Background technology
Since reform and opening-up, Chinese Auto Industry development is swift and violent, after new century, and either yield and pin
Amount, presents explosive growth especially, and after particularly breaking through 18,000,000 to production and marketing in 2010, it is maximum that China has become as the whole world
Automobile production and country of consumption, the automobile market of China is considered as the market that future development is with the largest potentiality.Automobile industry becomes
The pillar industry that national economy is important, has defined the more complete industrial system of ratio, has also become the mark embodying national competitiveness
Will industry.
But along with developing rapidly of automobile industry, a series of problem brought the most progressively manifests, global warming day
Acute increasingly, haze weather is more aobvious serious, and international crude petroleum disparities between supply and demand are progressively deepened, so countries in the world are in the development of auto industry
On also from the development of simple amount then more focus on the lifting of matter, more than 140 country participates in having signed " capital of a country memorandum of agreement ".And I
State the longest one period automobile demand amount will keep growth, the energy shortage and the environmental pollution that thus bring are asked
Topic will be more prominent.The most all and then develop to green manufacturing, industrial upgrading to this end, China is directed to industry self-discipline from country,
" Chinese Auto Industry adjusts and revitalizes planning ", " State Council is about accelerating to cultivate and the decision of development strategy new industry ",
" energy-conservation with new-energy automobile development plan " all to energy-conservation, reduce discharging, environmental protection proposes to be distinctly claimed, Jiangsu Province puts into effect the most specially
" new-energy automobile industry development ad hoc planning outline "." automobile industry 12 planning " is more to concrete technology, technique, product
Product, standard, requirement illustrate: promote safety energy-conserving environment protection technology, novel light, the application of environment-friendly materials, it is achieved automobile is light
Quantify, purifying, advance have independent intellectual property right and vehicle key parts research and development manufacturing technology, carried by internal-combustion engine technology
The application such as liter, lightweight makes Fuel Consumption decline 6% every year.
In this context, accelerate cultivate and develop energy-conservation (lightweight) automobile and new-energy automobile, be effectively to alleviate energy
Source and ambient pressure, promote the urgent task of automobile industry sustainable development, is also to speed up automobile industry transition and upgrade, cultivates newly
Point of economic increase and the strategic measure of international competitive advantage.Though existing with energy-saving and emission-reduction syllabus target new-energy automobile technology of attaching most importance to
The most constantly making a breakthrough, and gradually form with the energy, dynamo-electric new technique for supporting, multiple new forms of energy are power, contain new energy
The fields such as source vehicle complete vehicle, matching component, special energy storage material and related service, have huge market potential.But due to consumption
The accreditation of person and the degree of awareness and the bottle diameter of industry development itself, yield fluctuates with sales volume always, and therefore lightweight becomes
The most also being scheme of greatest concern, automotive light weight technology has become as the trend of world car development.Automotive light weight technology
To automobile fuel saving, reduce discharge, improve performance, automobile industry develop in a healthy way the most significant, be modern automobile industry skill
The direction of art development.
Authority's research display, if vehicle complete vehicle weight reduction 10%, fuel efficiency can improve 6% ~ 8%, discharges fall 4%；Automobile
Kerb weight often reduces 100 kilograms, and fuel consumption per hundred kilometers can reduce by 0.3 ~ 0.6 liter, and CO2 emission can reduce by about 5 grams/kilometer；
Vehicle weight reduces by 1%, and oil consumption can reduce by 0.7%.The energy conservation and environmental protection benefit of visible automotive light weight technology is felt no less than automobile engine
Technology fuel-saving technique.Aluminium alloy, magnesium alloy, plastics, high strength steel are four kinds of main materials of current automotive light weight technology.Automobile is used
The 70% of steel complete vehicle weight to be accounted for, and automobile steel pipe accounts for about the 18% of complete vehicle weight now, along with car A/B/C post
The employing of steel pipe and popularizing of crashproof steel pipe, the ratio of steel pipe also can improve further.Therefore, it is not only steel plate, including steel pipe
Lightweight will be all automotive energy-saving emission-reducing, improve the important means of performance.
Owing to the technological progress of automobile steel pipe is limited by the research and development of raw material, and whole adopting supplies chain longer, it is impossible to directly
In the face of car load manufacturer, so an always weak link in whole automobile industry supply chain, the most at home, it is subject to
Attention rate is less, so the steel pipe of automobile high-quality high added value still relies on import mostly so far.
Therefore, our company is responsive motor industrial development direction and national policy, in conjunction with research, experiment and the talent of colleges and universities
The industrialization advantage of advantage and Su Jia group, takes up to research and develop automobile steel pipe (welded tube) lightweight series project, to realize
The mass production of high-strength accurate welded tube used for vehicle transmission shaft, fills up the domestic blank in steel pipe lightweight field.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of special steel transmission shaft tube manufactures work
Skill, uses the transmission shaft tube intensity height of this processes, good toughness, and weld strength is high, after bearing bigger plastic deformation still
Higher obdurability can be kept.
The technical scheme provided according to the present invention: special steel transmission shaft tube manufacturing process, it is characterised in that include walking as follows
Rapid:
1), strip steel cutting: wide coil of strip slitting on slitter of outsourcing is become strip steel, according to the diameter needed for transmission shaft tube product
Determine the width of strip steel；
2), pickling processes: by strip steel good for slitting successively continually by descaling bath, cold rinse bank and hot water storgae, in descaling bath
Pickle uses hydrochloric acid, and strip steel is first sent into cold rinse bank after overpickling and used high pressure water washing, is then re-fed into hot water storgae and scalds,
Dry again after going out hot water storgae；
3), cold rolling: the strip steel after pickling carries out cold rolling by milling train, and the thickness of cold rolling rear strip steel is equal to needed for transmission shaft tube product
Thickness deduct 0.05 ~ 0.15mm；
4), roll bending formation and welding: the strip steel after cold rolling is sent into and uses W brake forming method to be made circle processing in forming machine, become
Strip steel after circle is welded into ERW on welding machine, and welding machine parameter is set as: bonding power is 200 ~ 260KW, and speed of welding is
15 ~ 20m/min, amount of compression is 2 ~ 2.5mm；
5), weld seam sublimate processes: uses high pressure nitrogen to rinse welding region in molding welding process, is specially in distance
High pressure nitrogen fumarole is installed at welding region 50cm, makes high pressure nitrogen be full of whole welding region, thus carry for welding process
Supplied gas is protected, and reduces the generation of oxide inclusion in welding process, improves the eliminating efficiency of slag in weld；Meanwhile, at vertical masonry joint
When welded tube not yet cools down, use burring knife milling downhand welding pipe commissure burr, including remove welded tube outer surface outer burr and
Burr within welded tube；
6), annealing: the ERW after being processed by sublimate introduces in heating chamber, treats that the temperature of ERW is heated to
When 810 ~ 820 DEG C, then ERW being sent into incubation cavity, be incubated 20 ~ 30min, be re-fed into cooling chamber cooling, rate of cooling is 70
~80℃/h；
7), phosphatization, saponification process: immersed successively by ERW in phosphating pond and saponification pond, carry out phosphatization, saponification process, phosphorus
ERW after change, saponification is sent in head rolling machine and is carried out dog, makes welded pipe end diameter reach required size；
8) cold-drawn processes: ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamp the termination after pinching process, with
Time be inserted into mandrel at welded tube, then make welded tube pass with tapered minimum-value aperture less than the die hole of welded tube external diameter, make welded tube
Inside and outside caliber uniform shrinkage deformation, welded tube length direction is extended, is carried out cold-drawn 1 ~ 3 time according to different technological requirements,
To obtain required size.
As a further improvement on the present invention, the coil of strip material in described step 1) is the cold drawn steel of 700QZ.
As a further improvement on the present invention, described step 2) in, in descaling bath, the concentration of hydrochloric acid is 120 ~ 160g/L；Cold
Flushing temperature in tank is 10 ~ 30 DEG C, and flushing pressure is 8 ~ 10kg/cm2；Temperature of scalding in hot water storgae is 90 ~ 100 DEG C；
Strip steel is 30 ~ 40m/ minute through the speed of descaling bath, cold rinse bank and hot water storgae and the speed of drying, dry temperature be 100 ~
120℃。
As a further improvement on the present invention, the Phosphating Solution in described step 6) be volumetric concentration be the zinc calcium phosphorus of 10 ~ 11%
Changing liquid, the temperature of Phosphating Solution is 65 ~ 75 DEG C, and ERW dip time in Phosphating Solution is 25 ~ 30 minutes.
As a further improvement on the present invention, the saponification liquor composition in described step 6) includes lubricant, water and soap powder, its
In, the mass ratio of lubricant and water is 1:(18 ~ 20), soap powder consumption is 50 ~ 60KG/ ton saponification liquor, and saponification liquor temperature is 65 ~ 75
DEG C, ERW dip time in saponification liquor is 10 ~ 25 minutes.
As a further improvement on the present invention, described manufacturing process also includes surface treatment step, and surface treatment step exists
After cold-drawn processes step, the concrete operations of surface treatment step are: rust remover spraying covered on the surface of ERW, so
Blowing the surface of ERW with high temperature compressed air afterwards, while being blown away by rust remover, high temperature compressed air will
The rust remover of ERW surface residual is dried, and forms one layer of rust remover protecting film on the surface of welded tube.
The present invention compared with prior art, have the advantage that the transmission shaft tube intensity that manufacturing process of the present invention processes high,
Good toughness, weld strength is high, still can keep higher obdurability after bearing bigger plastic deformation；90 degree and 0 degree pressures of steel pipe
Flat test reaches 1/2D weld seam flawless；Steel pipe tensile strength is more than 700Mpa；The test of steel pipe residual stress, less than 15mm, meets
Power transmission shaft dynamic balancing index.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
Manufacture the vehicle transmission central siphon of Φ 110 × 5mm specification, comprise the steps:
1), strip steel cutting: according to the diameter needed for transmission shaft tube product, by the coil of strip of the thickness 5mm × width 1280mm of outsourcing
The strip steel that slitting becomes width to be 340mm on slitter；The material of described strip steel is the cold drawn steel of 700QZ；
2), pickling processes: by strip steel good for slitting successively continually by descaling bath, cold rinse bank and hot water storgae, in descaling bath
Pickle uses hydrochloric acid, and the concentration of hydrochloric acid is 120g/L；Strip steel is first sent into cold rinse bank after overpickling and is used high pressure water washing, cold
Flushing temperature in tank is 10 DEG C, and flushing pressure is 10kg/cm2；Then being re-fed into hot water storgae to scald, scalding temperature is 100
DEG C, dry again after going out hot water storgae, drying temperature is 100 DEG C；Strip steel in hot water storgae is through descaling bath, cold rinse bank and hot water storgae
The speed of speed and drying is 30m/ minute,
3), cold rolling: the strip steel after pickling carries out cold rolling by milling train, and the thickness of cold rolling rear strip steel is equal to needed for transmission shaft tube product
Thickness deduct 0.05mm；
4), roll bending formation and welding: the strip steel after cold rolling is sent into and uses W brake forming method to be made circle processing in forming machine, become
Strip steel after circle is welded into ERW on welding machine, and welding machine parameter is set as: bonding power is 200KW, and speed of welding is 15m/
Min, amount of compression is 2mm；
5), weld seam sublimate processes: uses high pressure nitrogen to rinse welding region in molding welding process, is specially in distance
High pressure nitrogen fumarole is installed at welding region 50cm, makes high pressure nitrogen be full of whole welding region, thus carry for welding process
Supplied gas is protected, and reduces the generation of oxide inclusion in welding process, improves the eliminating efficiency of slag in weld；Meanwhile, at vertical masonry joint
When welded tube not yet cools down, use burring knife milling downhand welding pipe commissure burr, including remove welded tube outer surface outer burr and
Burr within welded tube；
6), annealing: the ERW after being processed by sublimate introduces in heating chamber, treats that the temperature of ERW is heated to
When 810 DEG C, then ERW being sent into incubation cavity, be incubated 30min, be re-fed into cooling chamber cooling, rate of cooling is 70 DEG C/h；
7), phosphatization, saponification process: immersed successively by ERW in phosphating pond and saponification pond, carry out phosphatization, saponification process；Phosphorus
Change the Phosphating Solution in pond be volumetric concentration be the zinc calcium phosphorization liquid of 10%, the temperature of Phosphating Solution is 75 DEG C, and ERW is at Phosphating Solution
In dip time be 25 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubricant and water
Mass ratio be 1:18, soap powder consumption is 50KG/ ton saponification liquor, and saponification liquor temperature is 75 DEG C, and ERW is in saponification liquor
Dip time is 10 minutes；ERW after phosphatization, saponification is sent in head rolling machine and is carried out dog, makes welded pipe end diameter reach
Required size；
8) cold-drawn processes: ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamp the termination after pinching process, with
Time be inserted into mandrel at welded tube, then make welded tube pass with tapered minimum-value aperture less than the die hole of welded tube external diameter, make welded tube
Inside and outside caliber uniform shrinkage deformation, welded tube length direction is extended, is carried out cold-drawn 2 times according to technological requirement, to obtain
The size needed；
9), surface processes: cover on the surface of ERW, rust remover spraying then with high temperature compressed air to ERW
Surface blow, while being blown away by rust remover, the rust remover of ERW surface residual is dried by high temperature compressed air
Dry, one layer of rust remover protecting film is formed on the surface of welded tube；
10), verification test: 90 degree and 0 degree flattening test of steel pipe of embodiment 1 preparation reaches 1/2D weld seam flawless；Steel pipe resists
Tensile strength is more than 700Mpa；The test of steel pipe residual stress, less than 15mm, meets power transmission shaft dynamic balancing index.
Embodiment 2
Manufacture the vehicle transmission central siphon of Φ 110 × 5mm specification, comprise the steps:
1), strip steel cutting: according to the diameter needed for transmission shaft tube product, by the coil of strip of the thickness 5mm × width 1280mm of outsourcing
The strip steel that slitting becomes width to be 340mm on slitter；The material of described strip steel is the cold drawn steel of 700QZ；
2), pickling processes: by strip steel good for slitting successively continually by descaling bath, cold rinse bank and hot water storgae, in descaling bath
Pickle uses hydrochloric acid, and the concentration of hydrochloric acid is 140g/L；Strip steel is first sent into cold rinse bank after overpickling and is used high pressure water washing, cold
Flushing temperature in tank is 20 DEG C, and flushing pressure is 9kg/cm2；Then being re-fed into hot water storgae to scald, scalding temperature is 95 DEG C,
Drying after going out hot water storgae, drying temperature is 110 DEG C again；Strip steel in hot water storgae is through the car of descaling bath, cold rinse bank and hot water storgae
Speed and the speed dried are 35m/ minute,
3), cold rolling: the strip steel after pickling carries out cold rolling by milling train, and the thickness of cold rolling rear strip steel is equal to needed for transmission shaft tube product
Thickness deduct 0.10mm；
4), roll bending formation and welding: the strip steel after cold rolling is sent into and uses W brake forming method to be made circle processing in forming machine, become
Strip steel after circle is welded into ERW on welding machine, and welding machine parameter is set as: bonding power is 230KW, and speed of welding is 18m/
Min, amount of compression is 2.3mm；
5), weld seam sublimate processes: uses high pressure nitrogen to rinse welding region in molding welding process, is specially in distance
High pressure nitrogen fumarole is installed at welding region 50cm, makes high pressure nitrogen be full of whole welding region, thus carry for welding process
Supplied gas is protected, and reduces the generation of oxide inclusion in welding process, improves the eliminating efficiency of slag in weld；Meanwhile, at vertical masonry joint
When welded tube not yet cools down, use burring knife milling downhand welding pipe commissure burr, including remove welded tube outer surface outer burr and
Burr within welded tube；
6), annealing: the ERW after being processed by sublimate introduces in heating chamber, treats that the temperature of ERW is heated to
When 815 DEG C, then ERW being sent into incubation cavity, be incubated 25min, be re-fed into cooling chamber cooling, rate of cooling is 75 DEG C/h；
7), phosphatization, saponification process: immersed successively by ERW in phosphating pond and saponification pond, carry out phosphatization, saponification process；Phosphorus
Change the Phosphating Solution in pond be volumetric concentration be the zinc calcium phosphorization liquid of 11%, the temperature of Phosphating Solution is 70 DEG C, and ERW is at Phosphating Solution
In dip time be 28 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubricant and water
Mass ratio be 1:19, soap powder consumption is 55KG/ ton saponification liquor, and saponification liquor temperature is 70 DEG C, and ERW is in saponification liquor
Dip time is 20 minutes；ERW after phosphatization, saponification is sent in head rolling machine and is carried out dog, makes welded pipe end diameter reach
Required size；
8) cold-drawn processes: ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamp the termination after pinching process, with
Time be inserted into mandrel at welded tube, then make welded tube pass with tapered minimum-value aperture less than the die hole of welded tube external diameter, make welded tube
Inside and outside caliber uniform shrinkage deformation, welded tube length direction is extended, is carried out cold-drawn 2 times according to technological requirement, to obtain
The size needed；
9), surface processes: cover on the surface of ERW, rust remover spraying then with high temperature compressed air to ERW
Surface blow, while being blown away by rust remover, the rust remover of ERW surface residual is dried by high temperature compressed air
Dry, one layer of rust remover protecting film is formed on the surface of welded tube；
10), verification test: 90 degree and 0 degree flattening test of steel pipe of embodiment 2 preparation reaches 1/2D weld seam flawless；Steel pipe resists
Tensile strength is more than 700Mpa；The test of steel pipe residual stress, less than 15mm, meets power transmission shaft dynamic balancing index.
Embodiment 3
Manufacture the vehicle transmission central siphon of Φ 110 × 5mm specification, comprise the steps:
1), strip steel cutting: according to the diameter needed for transmission shaft tube product, by the coil of strip of the thickness 5mm × width 1280mm of outsourcing
The strip steel that slitting becomes width to be 340mm on slitter；The material of described strip steel is the cold drawn steel of 700QZ；
2), pickling processes: by strip steel good for slitting successively continually by descaling bath, cold rinse bank and hot water storgae, in descaling bath
Pickle uses hydrochloric acid, and the concentration of hydrochloric acid is 160g/L；Strip steel is first sent into cold rinse bank after overpickling and is used high pressure water washing, cold
Flushing temperature in tank is 30 DEG C, and flushing pressure is 8kg/cm2；Then being re-fed into hot water storgae to scald, scalding temperature is 90 DEG C,
Drying after going out hot water storgae, drying temperature is 120 DEG C again；Strip steel in hot water storgae is through the car of descaling bath, cold rinse bank and hot water storgae
Speed and the speed dried are 40m/ minute,
3), cold rolling: the strip steel after pickling carries out cold rolling by milling train, and the thickness of cold rolling rear strip steel is equal to needed for transmission shaft tube product
Thickness deduct 0.15mm；
4), roll bending formation and welding: the strip steel after cold rolling is sent into and uses W brake forming method to be made circle processing in forming machine, become
Strip steel after circle is welded into ERW on welding machine, and welding machine parameter is set as: bonding power is 260KW, and speed of welding is 20m/
Min, amount of compression is 2.5mm；
5), weld seam sublimate processes: uses high pressure nitrogen to rinse welding region in molding welding process, is specially in distance
High pressure nitrogen fumarole is installed at welding region 50cm, makes high pressure nitrogen be full of whole welding region, thus carry for welding process
Supplied gas is protected, and reduces the generation of oxide inclusion in welding process, improves the eliminating efficiency of slag in weld；Meanwhile, at vertical masonry joint
When welded tube not yet cools down, use burring knife milling downhand welding pipe commissure burr, including remove welded tube outer surface outer burr and
Burr within welded tube；
6), annealing: the ERW after being processed by sublimate introduces in heating chamber, treats that the temperature of ERW is heated to
When 820 DEG C, then ERW being sent into incubation cavity, be incubated 20min, be re-fed into cooling chamber cooling, rate of cooling is 80 DEG C/h；
7), phosphatization, saponification process: immersed successively by ERW in phosphating pond and saponification pond, carry out phosphatization, saponification process；Phosphorus
Change the Phosphating Solution in pond be volumetric concentration be the zinc calcium phosphorization liquid of 11%, the temperature of Phosphating Solution is 65 DEG C, and ERW is at Phosphating Solution
In dip time be 30 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubricant and water
Mass ratio be 1:20, soap powder consumption is 60KG/ ton saponification liquor, and saponification liquor temperature is 65 DEG C, and ERW is in saponification liquor
Dip time is 25 minutes；ERW after phosphatization, saponification is sent in head rolling machine and is carried out dog, makes welded pipe end diameter reach
Required size；
8) cold-drawn processes: ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamp the termination after pinching process, with
Time be inserted into mandrel at welded tube, then make welded tube pass with tapered minimum-value aperture less than the die hole of welded tube external diameter, make welded tube
Inside and outside caliber uniform shrinkage deformation, welded tube length direction is extended, is carried out cold-drawn 2 times according to technological requirement, to obtain
The size needed；
9), surface processes: cover on the surface of ERW, rust remover spraying then with high temperature compressed air to ERW
Surface blow, while being blown away by rust remover, the rust remover of ERW surface residual is dried by high temperature compressed air
Dry, one layer of rust remover protecting film is formed on the surface of welded tube；
10), verification test: 90 degree and 0 degree flattening test of steel pipe of embodiment 3 preparation reaches 1/2D weld seam flawless；Steel pipe resists
Tensile strength is more than 700Mpa；The test of steel pipe residual stress, less than 15mm, meets power transmission shaft dynamic balancing index.
Coil of strip used in the present invention can use the material of commercially available routine to be the cold drawn steel of 700QZ, in above-mentioned each enforcement
The coil of strip produced for Baoshan Iron and Steel Group employed in example.
Zinc calcium phosphorization liquid used in the present invention can use the Zinc-calcium series phosphatating liquid of commercially available routine, in the various embodiments described above
Employed in for Jiangyin Jin Hong chemical treatment company limited produce zinc calcium phosphorization liquid.
Lubricant used in saponification liquor of the present invention can use the lubricant of commercially available routine, in the various embodiments described above
The lubricant produced for Shanghai chemical industry seven factory used.
Claims (6)
1. special steel transmission shaft tube manufacturing process, it is characterised in that comprise the steps:
1), strip steel cutting: wide coil of strip slitting on slitter of outsourcing is become strip steel, according to the diameter needed for transmission shaft tube product
Determine the width of strip steel；
2), pickling processes: by strip steel good for slitting successively continually by descaling bath, cold rinse bank and hot water storgae, in descaling bath
Pickle uses hydrochloric acid, and strip steel is first sent into cold rinse bank after overpickling and used high pressure water washing, is then re-fed into hot water storgae and scalds,
Dry again after going out hot water storgae；
3), cold rolling: the strip steel after pickling carries out cold rolling by milling train, and the thickness of cold rolling rear strip steel is equal to needed for transmission shaft tube product
Thickness deduct 0.05 ~ 0.15mm；
4), roll bending formation and welding: the strip steel after cold rolling is sent into and uses W brake forming method to be made circle processing in forming machine, become
Strip steel after circle is welded into ERW on welding machine, and welding machine parameter is set as: bonding power is 200 ~ 260KW, and speed of welding is
15 ~ 20m/min, amount of compression is 2 ~ 2.5mm；
5), weld seam sublimate processes: uses high pressure nitrogen to rinse welding region in molding welding process, is specially in distance
High pressure nitrogen fumarole is installed at welding region 50cm, makes high pressure nitrogen be full of whole welding region, thus carry for welding process
Supplied gas is protected, and reduces the generation of oxide inclusion in welding process, improves the eliminating efficiency of slag in weld；Meanwhile, at vertical masonry joint
When welded tube not yet cools down, use burring knife milling downhand welding pipe commissure burr, including remove welded tube outer surface outer burr and
Burr within welded tube；
6), annealing: the ERW after being processed by sublimate introduces in heating chamber, treats that the temperature of ERW is heated to
When 810 ~ 820 DEG C, then ERW being sent into incubation cavity, be incubated 20 ~ 30min, be re-fed into cooling chamber cooling, rate of cooling is 70
~80℃/h；
7), phosphatization, saponification process: immersed successively by ERW in phosphating pond and saponification pond, carry out phosphatization, saponification process, phosphorus
ERW after change, saponification is sent in head rolling machine and is carried out dog, makes welded pipe end diameter reach required size；
8) cold-drawn processes: ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamp the termination after pinching process, with
Time be inserted into mandrel at welded tube, then make welded tube pass with tapered minimum-value aperture less than the die hole of welded tube external diameter, make welded tube
Inside and outside caliber uniform shrinkage deformation, welded tube length direction is extended, is carried out cold-drawn 1 ~ 3 time according to different technological requirements,
To obtain required size.
2. special steel transmission shaft tube manufacturing process as claimed in claim 1, it is characterised in that: the coil of strip material in described step 1)
Matter is the cold drawn steel of 700QZ.
3. special steel transmission shaft tube manufacturing process as claimed in claim 1, it is characterised in that: described step 2) in, descaling bath
The concentration of middle hydrochloric acid is 120 ~ 160g/L；Flushing temperature in cold rinse bank is 10 ~ 30 DEG C, and flushing pressure is 8 ~ 10kg/cm2；Heat
Temperature of scalding in tank is 90 ~ 100 DEG C；Strip steel is equal through the speed of descaling bath, cold rinse bank and hot water storgae and the speed of drying
Being 30 ~ 40m/ minute, drying temperature is 100 ~ 120 DEG C.
4. special steel transmission shaft tube manufacturing process as claimed in claim 1, it is characterised in that: the Phosphating Solution in described step 6)
Be volumetric concentration be the zinc calcium phosphorization liquid of 10 ~ 11%, the temperature of Phosphating Solution is 65 ~ 75 DEG C, ERW dipping in Phosphating Solution
Time is 25 ~ 30 minutes.
5. special steel transmission shaft tube manufacturing process as claimed in claim 1, it is characterised in that: the saponification liquor in described step 6)
Composition includes lubricant, water and soap powder, and wherein, the mass ratio of lubricant and water is 1:(18 ~ 20), soap powder consumption is 50 ~ 60KG/
Ton saponification liquor, saponification liquor temperature is 65 ~ 75 DEG C, and ERW dip time in saponification liquor is 10 ~ 25 minutes.
6. special steel transmission shaft tube manufacturing process as claimed in claim 1, it is characterised in that: described manufacturing process also includes table
Face processes step, and surface treatment step is after cold-drawn processes step, and the concrete operations of surface treatment step are: sprayed by rust remover
It is coated with and covers on the surface of ERW, then with high temperature compressed air, is blown in the surface of ERW, by rust remover
While blowing away, the rust remover of ERW surface residual is dried by high temperature compressed air, forms one layer on the surface of welded tube and removes
Rust agent protecting film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610684720.3A CN106216955B (en) | 2016-08-18 | 2016-08-18 | special steel transmission shaft tube manufacturing process |
Applications Claiming Priority (1)
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| TWI668328B (en) * | 2018-07-02 | 2019-08-11 | 楊景峰 | Method for zero-discharge phosphatization and saponification based on high-pressure closed circulation system |
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