CN106216955B - special steel transmission shaft tube manufacturing process - Google Patents
special steel transmission shaft tube manufacturing process Download PDFInfo
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- CN106216955B CN106216955B CN201610684720.3A CN201610684720A CN106216955B CN 106216955 B CN106216955 B CN 106216955B CN 201610684720 A CN201610684720 A CN 201610684720A CN 106216955 B CN106216955 B CN 106216955B
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- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
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Abstract
The present invention relates to a kind of special steel transmission shaft tube manufacturing process, belong to metal material processing technical field.Special steel transmission shaft tube manufacturing process, it is characterised in that including the step such as strip cutting, pickling processes, cold rolling, roll bending formation and welding, the processing of weld seam sublimate, annealing, phosphatization, saponification process and cold drawing treatment.Transmission shaft tube intensity height, the good toughness of manufacturing process processing of the present invention, weld strength is high, and higher obdurability can be still kept after larger plastic deformation is born；90 degree and 0 degree flattening test of steel pipe reaches 1/2D weld seam flawlesses；Steel pipe tensile strength is more than 700Mpa；The experiment of steel pipe residual stress is 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 the new century, either yield and pin
Amount, is even more presented explosive growth, and after particularly breaking through 18,000,000 to production and marketing in 2010, China has become global maximum
Automobile production and country of consumption, the automobile market in China is considered as future development market with the largest potentiality.Automobile industry turns into
The important pillar industry of national economy, form than more complete industrial system, also turned into the mark for embodying national competitiveness
Will industry.
But with developing rapidly for automobile industry, a series of problem brought also progressively shows, global warming day
Increasingly acute, haze weather is more aobvious serious, and international crude petroleum disparities between supply and demand are progressively deepened, so development of the countries in the world in auto industry
On also from the development of simple amount then more focus on the lifting of matter, country participates in signing more than 140《Capital of a country memorandum of agreement》.And I
State will keep growth in longer one section of period automobile demand amount from now on, and the energy shortage and environmental pollution thus brought is asked
Topic will be protruded more.Therefore, China from country be directed to industry self-discipline also all so as to green manufacturing, industrial upgrading develop,
《Chinese Auto Industry adjusts and revitalized planning》、《State Council cultivates the decision with development strategy new industry on accelerating》、
《Energy-conservation and new-energy automobile development plan》All energy-conservation, emission reduction, environmental protection are proposed to be distinctly claimed, Jiangsu Province is also specially put into effect
《New-energy automobile industry development ad hoc planning outline》.《Automobile industry 12 is planned》More to specific technology, technique, production
Product, standard, requirement illustrate：Promote the application of safety energy-conserving environment protection technology, novel light, environment-friendly materials, realize that automobile is light
Quantify, be purifying, promoting with 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 to cultivate and development saves（Lightweight）Automobile and new-energy automobile, it is both effective alleviation energy
Source and environmental pressure, the urgent task of automobile industry sustainable development is promoted, be also to speed up automobile industry transition and upgrade, cultivate newly
Point of economic increase and international competitive advantage strategic measure.Though existed with energy-saving and emission-reduction syllabus target new-energy automobile technology of attaching most importance to
In recent years constantly make a breakthrough, and gradually form using the energy, electromechanical new technology as support, a variety of new energy are power, cover new energy
The fields such as source vehicle complete vehicle, matching component, special energy storage material and related service, there is huge market potential.But due to consumption
The accreditation of person and the degree of awareness and the bottle diameter of industry development in itself, yield fluctuates always with sales volume, therefore lightweight turns into
Most it is also reliably scheme of greatest concern at present, automotive light weight technology has become the trend of world car development.Automotive light weight technology
Automobile fuel saving, reduction discharge, improvement performance, automobile industry are developed in a healthy way all significant, are modern automobile industry skill
The direction of art development.
If authoritative studies have shown that vehicle complete vehicle weight reduction 10%, fuel efficiency can improve 6% ~ 8%, discharge drop 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%.It can be seen that the energy conservation and environmental protection benefit of automotive light weight technology, which is felt, is 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 using
Steel will averagely account for the 70% of complete vehicle weight, and automobile using steel pipe accounts for 18% of complete vehicle weight or so now, with car A/B/C posts
The use of steel pipe and the popularization of anticollision steel pipe, the ratio of steel pipe can also be improved further.Therefore, steel plate, including steel pipe are not only
Lightweight all will be automotive energy-saving emission-reducing, improve the important means of performance.
Because the technological progress of automobile using steel pipe is limited by the research and development of raw material, and entirely adopt longer for chain, it is impossible to directly
In face of vehicle manufacturer, so being always a weak link in whole automobile industry supply chain, especially at home, it is subject to
Attention rate is smaller, so the steel pipe of automobile using high quality high added value still relies on import mostly so far.
Therefore, our company is responsive motor industrial development direction and national policy, with reference to the research, experiment and the talent of colleges and universities
Advantage and the industrialization advantage of Su Jia groups, take up to research and develop automobile using steel pipe（Welded tube）Lightweight series project, to realize
The mass production of high-strength accurate welded tube used for vehicle transmission shaft, fill up the domestic blank in steel pipe lightweight field.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of special steel transmission shaft tube manufactures work
Skill, using transmission shaft tube intensity height, the good toughness of technique processing, weld strength is high, after larger plastic deformation is born still
Higher obdurability can be kept.
According to technical scheme provided by the invention：Special steel transmission shaft tube manufacturing process, it is characterised in that including following step
Suddenly：
1）, strip cut：By the wide coil of strip of outsourcing, slitting is into strip on slitter, according to needed for transmission shaft tube product
Diameter determines the width of strip；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, strip is first sent into cold rinse bank after overpickling and uses high pressure water washing, is then re-fed into hot water storgae
Scald, dried again after going out hot water storgae；
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is equal to transmission shaft tube product after cold rolling
Required thickness subtracts 0.05 ~ 0.15mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into forming machine round add is made using W brake forming methods
Work, Cheng Yuanhou strip are welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 200 ~ 260KW, welding speed
It is 2 ~ 2.5mm to spend for 15 ~ 20m/min, amount of compression；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, annealing：ERW after sublimate is handled is introduced into heating chamber, treats the temperature heating of ERW
During to 810 ~ 820 DEG C, then ERW is sent into incubation cavity, is incubated 20 ~ 30min, is re-fed into cooling chamber cooling, cooling velocity is
70~80℃/h；
7）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason, the ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, welded pipe end diameter is reached required size；
8）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 1 ~ 3 is carried out according to different technological requirements
It is secondary, to obtain required size.
As a further improvement on the present invention, the step 1）In coil of strip material be the cold drawn steel of 700QZ.
As a further improvement on the present invention, the step 2）In, the concentration of hydrochloric acid is 120 ~ 160g/L in descaling bath；It is cold
Flushing temperature in tank is 10 ~ 30 DEG C, and flushing pressure is 8 ~ 10kg/cm2；Temperature is scalded as 90 ~ 100 DEG C in hot water storgae；
Strip is 30 ~ 40m/ minutes by the speed of descaling bath, the speed of cold rinse bank and hot water storgae and drying, and drying temperature is 100 ~
120℃。
As a further improvement on the present invention, the step 6）In phosphating solution be volumetric concentration be 10 ~ 11% zinc calcium phosphorus
Change liquid, the temperature of phosphating solution is 65 ~ 75 DEG C, and dip time of the ERW in phosphating solution is 25 ~ 30 minutes.
As a further improvement on the present invention, the step 6）In saponification liquor composition include lubricant, water and soap powder, its
In, the mass ratio of lubricant and water is 1：（18~20）, soap powder dosage is 50 ~ 60KG/ ton saponification liquors, and saponification liquor temperature is 65 ~ 75
DEG C, dip time of the ERW in saponification liquor is 10 ~ 25 minutes.
As a further improvement on the present invention, the manufacturing process also includes surface treatment step, and surface treatment step exists
After cold drawing treatment step, the concrete operations of surface treatment step are：Rust remover spraying is covered in the surface of ERW, so
The surface of ERW is blown with high temperature compressed air afterwards, while rust remover is blown away, high temperature compressed air will
The rust remover drying of ERW surface residual, one layer of rust remover diaphragm is formed on the surface of welded tube.
The present invention compared with prior art, has the following advantages that：The transmission shaft tube intensity height of manufacturing process processing of the present invention,
Good toughness, weld strength is high, and higher obdurability can be still kept after larger plastic deformation is born；90 degree and 0 degree pressures of steel pipe
Flat experiment reaches 1/2D weld seam flawlesses；Steel pipe tensile strength is more than 700Mpa；The experiment of steel pipe residual stress is less than 15mm, meets
Power transmission shaft dynamic balancing index.
Embodiment
With reference to specific embodiment, the invention will be further described.
Embodiment 1
The vehicle transmission central siphon of Φ 110 × 5mm specifications is manufactured, is comprised the following steps：
1）, strip cut：According to the diameter needed for transmission shaft tube product, by thickness 5mm × width 1280mm's of outsourcing
The coil of strip strip of slitting into width for 340mm on slitter；The material of the strip is the cold drawn steel of 700QZ；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, the concentration of hydrochloric acid is 120g/L；Strip is first sent into cold rinse bank after overpickling and uses high pressure water flushing
Wash, the flushing temperature in cold rinse bank is 10 DEG C, flushing pressure 10kg/cm2；Then it is re-fed into hot water storgae to scald, scalds temperature
For 100 DEG C, dried again after going out hot water storgae, drying temperature is 100 DEG C；Strip in hot water storgae passes through descaling bath, cold rinse bank and heat
The speed of tank and the speed of drying are 30m/ minutes,
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is equal to transmission shaft tube product after cold rolling
Required thickness subtracts 0.05mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into forming machine round add is made using W brake forming methods
Work, Cheng Yuanhou strip are welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 200KW, and speed of welding is
15m/min, amount of compression 2mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, annealing：ERW after sublimate is handled is introduced into heating chamber, treats the temperature heating of ERW
During to 810 DEG C, then ERW is sent into incubation cavity, is incubated 30min, is re-fed into cooling chamber cooling, cooling velocity is 70 DEG C/h；
7）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason；Phosphating solution in phosphating pond is the zinc calcium phosphorization liquid that volumetric concentration is 10%, and the temperature of phosphating solution is 75 DEG C, and ERW exists
Dip time in phosphating solution is 25 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubrication
The mass ratio of agent and water is 1：18, soap powder dosage is 50KG/ ton saponification liquors, and saponification liquor temperature is 75 DEG C, and ERW is in saponification
Dip time in liquid is 10 minutes；ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, makes welded pipe end straight
Footpath reaches required size；
8）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 2 times is carried out according to technological requirement, with
To required size；
9）, surface treatment：Rust remover spraying is covered in the surface of ERW, then with high temperature compressed air to vertical masonry joint
The surface of welded tube is blown, and while rust remover is blown away, high temperature compressed air is by the derusting of ERW surface residual
Agent is dried, and one layer of rust remover diaphragm is formed on the surface of welded tube；
10）, verification test：90 degree and 0 degree flattening test of steel pipe prepared by embodiment 1 reaches 1/2D weld seam flawlesses；Steel
Pipe tensile strength is more than 700Mpa；The experiment of steel pipe residual stress is less than 15mm, meets power transmission shaft dynamic balancing index.
Embodiment 2
The vehicle transmission central siphon of Φ 110 × 5mm specifications is manufactured, is comprised the following steps：
1）, strip cut：According to the diameter needed for transmission shaft tube product, by thickness 5mm × width 1280mm's of outsourcing
The coil of strip strip of slitting into width for 340mm on slitter；The material of the strip is the cold drawn steel of 700QZ；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, the concentration of hydrochloric acid is 140g/L；Strip is first sent into cold rinse bank after overpickling and uses high pressure water flushing
Wash, the flushing temperature in cold rinse bank is 20 DEG C, flushing pressure 9kg/cm2；Then it is re-fed into hot water storgae to scald, scalding temperature is
95 DEG C, dried again after going out hot water storgae, drying temperature is 110 DEG C；Strip in hot water storgae passes through descaling bath, cold rinse bank and hot water storgae
Speed and drying speed be 35m/ minutes,
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is equal to transmission shaft tube product after cold rolling
Required thickness subtracts 0.10mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into forming machine round add is made using W brake forming methods
Work, Cheng Yuanhou strip are welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 230KW, and speed of welding is
18m/min, amount of compression 2.3mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, annealing：ERW after sublimate is handled is introduced into heating chamber, treats the temperature heating of ERW
During to 815 DEG C, then ERW is sent into incubation cavity, is incubated 25min, is re-fed into cooling chamber cooling, cooling velocity is 75 DEG C/h；
7）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason；Phosphating solution in phosphating pond is the zinc calcium phosphorization liquid that volumetric concentration is 11%, and the temperature of phosphating solution is 70 DEG C, and ERW exists
Dip time in phosphating solution is 28 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubrication
The mass ratio of agent and water is 1：19, soap powder dosage is 55KG/ ton saponification liquors, and saponification liquor temperature is 70 DEG C, and ERW is in saponification
Dip time in liquid is 20 minutes；ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, makes welded pipe end straight
Footpath reaches required size；
8）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 2 times is carried out according to technological requirement, with
To required size；
9）, surface treatment：Rust remover spraying is covered in the surface of ERW, then with high temperature compressed air to vertical masonry joint
The surface of welded tube is blown, and while rust remover is blown away, high temperature compressed air is by the derusting of ERW surface residual
Agent is dried, and one layer of rust remover diaphragm is formed on the surface of welded tube；
10）, verification test：90 degree and 0 degree flattening test of steel pipe prepared by embodiment 2 reaches 1/2D weld seam flawlesses；Steel
Pipe tensile strength is more than 700Mpa；The experiment of steel pipe residual stress is less than 15mm, meets power transmission shaft dynamic balancing index.
Embodiment 3
The vehicle transmission central siphon of Φ 110 × 5mm specifications is manufactured, is comprised the following steps：
1）, strip cut：According to the diameter needed for transmission shaft tube product, by thickness 5mm × width 1280mm's of outsourcing
The coil of strip strip of slitting into width for 340mm on slitter；The material of the strip is the cold drawn steel of 700QZ；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, the concentration of hydrochloric acid is 160g/L；Strip is first sent into cold rinse bank after overpickling and uses high pressure water flushing
Wash, the flushing temperature in cold rinse bank is 30 DEG C, flushing pressure 8kg/cm2；Then it is re-fed into hot water storgae to scald, scalding temperature is
90 DEG C, dried again after going out hot water storgae, drying temperature is 120 DEG C；Strip in hot water storgae passes through descaling bath, cold rinse bank and hot water storgae
Speed and drying speed be 40m/ minutes,
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is equal to transmission shaft tube product after cold rolling
Required thickness subtracts 0.15mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into forming machine round add is made using W brake forming methods
Work, Cheng Yuanhou strip are welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 260KW, and speed of welding is
20m/min, amount of compression 2.5mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, annealing：ERW after sublimate is handled is introduced into heating chamber, treats the temperature heating of ERW
During to 820 DEG C, then ERW is sent into incubation cavity, is incubated 20min, is re-fed into cooling chamber cooling, cooling velocity is 80 DEG C/h；
7）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason；Phosphating solution in phosphating pond is the zinc calcium phosphorization liquid that volumetric concentration is 11%, and the temperature of phosphating solution is 65 DEG C, and ERW exists
Dip time in phosphating solution is 30 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubrication
The mass ratio of agent and water is 1：20, soap powder dosage is 60KG/ ton saponification liquors, and saponification liquor temperature is 65 DEG C, and ERW is in saponification
Dip time in liquid is 25 minutes；ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, makes welded pipe end straight
Footpath reaches required size；
8）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 2 times is carried out according to technological requirement, with
To required size；
9）, surface treatment：Rust remover spraying is covered in the surface of ERW, then with high temperature compressed air to vertical masonry joint
The surface of welded tube is blown, and while rust remover is blown away, high temperature compressed air is by the derusting of ERW surface residual
Agent is dried, and one layer of rust remover diaphragm is formed on the surface of welded tube；
10）, verification test：90 degree and 0 degree flattening test of steel pipe prepared by embodiment 3 reaches 1/2D weld seam flawlesses；Steel
Pipe tensile strength is more than 700Mpa；The experiment of steel pipe residual stress is less than 15mm, meets power transmission shaft dynamic balancing index.
Coil of strip used in the present invention can use commercially available conventional material as the cold drawn steel of 700QZ, in above-mentioned each implementation
The coil of strip for Baoshan Iron and Steel Group's production employed in example.
Zinc calcium phosphorization liquid used in the present invention can use commercially available conventional Zinc-calcium series phosphatating liquid, in the various embodiments described above
Employed in for Jiangyin brocade it is grand chemical treatment Co., Ltd production zinc calcium phosphorization liquid.
Lubricant used in saponification liquor of the present invention can use commercially available conventional lubricant, in the various embodiments described above
The used lubricant for the production of the factory of Shanghai chemical industry seven.
Claims (6)
1. special steel transmission shaft tube manufacturing process, it is characterised in that comprise the following steps：
1）, strip cut：By the wide coil of strip of outsourcing, slitting is into strip on slitter, according to the diameter needed for transmission shaft tube product
Determine the width of strip；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, in descaling bath
Pickle uses hydrochloric acid, and strip is first sent into cold rinse bank after overpickling and uses high pressure water washing, is then re-fed into hot water storgae and scalds,
Dried again after going out hot water storgae；
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is equal to needed for transmission shaft tube product after cold rolling
Thickness subtract 0.05 ~ 0.15mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into forming machine round processing is made using W brake forming methods, into
Strip after circle is welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 200 ~ 260KW, and speed of welding is
15 ~ 20m/min, amount of compression are 2 ~ 2.5mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially in distance
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be carried for welding process
Supplied gas is protected, and reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile in vertical masonry joint
When welded tube not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including remove welded tube outer surface outer burr and
Burr inside welded tube；
6）, annealing：ERW after sublimate is handled is introduced into heating chamber, treats that the temperature of ERW is heated to
At 810 ~ 820 DEG C, then ERW is sent into incubation cavity, is incubated 20 ~ 30min, is re-fed into cooling chamber cooling, cooling velocity 70
~80℃/h；
7）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, carries out phosphatization, saponification process, phosphorus
Change, carry out dog in the ERW feeding head rolling machine after saponification, welded pipe end diameter is reached required size；
8）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the termination after pinching processing, together
When mandrel is inserted in welded tube, then make welded tube pass through with tapered minimum-value aperture be less than welded tube external diameter die hole, make welded tube
Inside and outside caliber uniform shrinkage is deformed, and is extended on welded tube length direction, and cold-drawn 1 ~ 3 time is carried out 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 step 1）In coil of strip material
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：The 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 is scalded as 90 ~ 100 DEG C in tank；Strip is equal by the speed of descaling bath, the speed of cold rinse bank and hot water storgae and drying
For 30 ~ 40m/ minutes, 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 step 7）In phosphating solution
It is the zinc calcium phosphorization liquid that volumetric concentration is 10 ~ 11%, the temperature of phosphating solution is 65 ~ 75 DEG C, dipping of the ERW 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 step 7）In saponification liquor
Composition includes lubricant, water and soap powder, wherein, the mass ratio of lubricant and water is 1：（18~20）, soap powder dosage is 50 ~ 60KG/
Ton saponification liquor, saponification liquor temperature are 65 ~ 75 DEG C, and dip time of the ERW 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：The manufacturing process also includes table
Face processing step, after cold drawing treatment step, the concrete operations of surface treatment step are surface treatment step：Rust remover is sprayed
Apply and be covered in the surface of ERW, then the surface of ERW is blown with high temperature compressed air, by rust remover
While blowing away, high temperature compressed air dries the rust remover of ERW surface residual, and forming one layer on the surface of welded tube removes
Become rusty agent diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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