CN102489944A - Processing method of 2Cr13 rectangular pipe - Google Patents
Processing method of 2Cr13 rectangular pipe Download PDFInfo
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- CN102489944A CN102489944A CN2011103850841A CN201110385084A CN102489944A CN 102489944 A CN102489944 A CN 102489944A CN 2011103850841 A CN2011103850841 A CN 2011103850841A CN 201110385084 A CN201110385084 A CN 201110385084A CN 102489944 A CN102489944 A CN 102489944A
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Abstract
The invention provides a processing method of a 2Cr13 rectangular pipe, belonging to the field of the processing technology of the martensite stainless steel pipes. The processing method comprises the following steps: preparing materials; heating; punching a hole; annealing; pickling; lubricating; cold-rolling; hammering; cold-drawing and final-annealing; and finishing. The technical scheme provided by the invention only needs one or two passes of cold rolling and twice cold drawings, thus reducing three production passes relative to the production passes in the prior art, further obviously shortening the process flow and having outstanding energy-saving effect; and as the production passes are obviously reduced, the processing method provided by the invention can improve the rolling yield by 8-10 % relative to the rolling yield in the prior art, thus meeting the requirement of the industrial large-scale production.
Description
Technical field
The invention belongs to martensitic stain less steel pipe processing technique field, be specifically related to a kind of processing method of 2Cr13 rectangle tubing.
Background technology
The notion of above mentioned rectangle tubing is meant that the shape of cross section of tubing is rectangular.The 2Cr13 material belongs to martensitic stain less steel, and its main alloy element is iron, chromium and carbon, because there is the drawback of bad plasticity and cold working difficulty in this type of steel, therefore usually pole perforation back is obtained rectangle tubing with the cold-drawn mode.This processing mode production passage is many, generally needs through the pipe cold-drawn of four passages and the special-shaped cold-drawn of three passages.Simultaneously, because the bad plasticity of 2Cr13 material is promptly easy to crack in special-shaped Cold Drawing Process in cold working; And, the cold-drawn passage the more, the probability of cracking is high more; The loss of metal material is also big more, thereby causes energy waste, lumber recovery is low and processing cost is high problem.
The applicant has done literature search; Yet in disclosed Chinese patent document, both be not seen in teachings, do not found yet other trade mark technical information of 1Cr13,3Cr13 and the processing of 4Cr13 rectangle tubing for example about the processing method of 2Cr13 rectangle tubing.For this reason, the applicant is intended to eliminate aforesaid shortcoming and has made long-term exploration, below the technical scheme that will introduce based on producing under this background.
Summary of the invention
Task of the present invention is to provide a kind of and helps significantly to simplify technical process, helps remarkable energy savings, is of value to the minimizing material unaccounted-for (MUF) and the processing method of being convenient to reduce production costs and using the 2Cr13 rectangle tubing that satisfies the industrial amplification production requirement is arranged.
Task of the present invention is accomplished like this, and a kind of processing method of 2Cr13 rectangle tubing may further comprise the steps:
A) get the raw materials ready, at first choose the 2Cr13 pole with the ratio of the cross-sectional area of pole,, obtain the pole base again to the pole surface treatment by the cross-sectional area of the trimmed size of rectangle tubing;
B) heat, the pole base is sent in the heating furnace heated, and the control heating-up temperature, obtain waiting to bore a hole the pole base;
C) perforation, the pole base of will waiting to bore a hole is bored a hole on punch, obtains the hollow billet of boring a hole;
D) annealing furnace annealing is sent in annealing, the hollow billet of will boring a hole, and control annealing temperature and control annealing time; With the nature cooling of coming out of the stove after the stove cooling, and control with the stove chilling temperature, two end-grain cutting of the hollow billet of will boring a hole after the cooling naturally are flat; And the control two ends cut leveling ruler cun, obtain the hollow billet of annealing;
E) pickling, the hollow billet of will annealing are introduced pickling tube and are carried out pickling earlier with pickle, then use the acid solution rinsing, obtain the pickling pipe;
F) lubricated, lubricant is applied in the outer surface and the hole wall surface of pickling pipe equably, and sends into oven dry in the drying oven, control bake out temperature and time, the hollow billet that obtains lubricating;
G) cold rolling, lubricated hollow billet split rolling method on cold-rolling mill is become the circular pipe blank before abnormity is out of shape, and control the split rolling method passage, obtain the pipe of cogging;
H) tup, elder generation heats an end of the pipe of cogging, and the length of an end of control heating and control heating-up temperature, then hits circular chieftain by the pneumatic hammer of being furnished with the tup mould, more circular chieftain is hammered into flat chieftain, obtains treating the cold-drawn pipe;
I) cold-drawn and finished products; To treat that the cold-drawn hollow billet is deformed into shape of cross section ovalize pipe through the first passage cold-drawn abnormity on drawbench; Then at repeating step D successively) annealing, step e) pickling, step F) lubricated and step H) the tup operation after; Carry out the second passage cold-drawn abnormity again and be deformed into the rectangular rectangular tube of shape of cross section, then D set by step) operation carry out finished products, obtain 2Cr13 rectangular tube base just;
J) finishing is earlier to 2Cr13 rectangular tube just base aligning and excision termination, two ends, the length of control excision termination, two ends, then repeating step E) operation, obtain the 2Cr13 rectangular tube of finished product.
In a concrete embodiment of the present invention, steps A) ratio by the cross-sectional area of the trimmed size of rectangle tubing and the cross-sectional area of pole described in is 1: 5.5～10.5; Described surface treatment is meant cut is carried out on the pole surface to pole, and to remove the pole crizzle, the degree of depth of cut is 0.5-0.8mm.
In another concrete embodiment of the present invention, step B) heating furnace described in is a Sloping Hearth Heating Furnace, and described control heating-up temperature is to be 1150-1180 ℃ with heating and temperature control.
In another concrete embodiment of the present invention, step C) punch described in is two roller Mannesmann piercing mills, and the external diameter of described perforation hollow billet is 4-8mm than the big 1-4mm of diameter of said pole base and the wall thickness of perforation hollow billet.
In another concrete embodiment of the present invention, step D) annealing furnace described in is the combustion type continuous annealing furnace, and described control annealing temperature is that annealing temperature is controlled to be 780-820 ℃; Described control annealing time is that annealing time is controlled to be 50-70min; Described control is that temperature is controlled to be below 650 ℃ with the stove chilling temperature; The leveling ruler of cutting at described control two ends cun is meant each the resection length 20～30mm of two ends to the perforation hollow billet.
Also have among the concrete embodiment step e of the present invention) described in pickle be that mass percent concentration is the sulfuric acid solution of 8-15%; Described acid solution rinsing is the salpeter solution rinsing of 10-18% for adopting mass percent concentration, and the time of rinsing is 2-5min.
more of the present invention and among concrete embodiment, step F) lubricant described in is the mixture of butter and lime powder, and wherein the weight ratio of butter and lime powder is 1: 9-11; Described control bake out temperature is that bake out temperature is controlled to be 200-250 ℃, and drying time is controlled to be 30-40min.
In of the present invention and then concrete embodiment; Step G) cold-rolling mill described in is two cold mills; Described control split rolling method passage is that the split rolling method passage is controlled to be once or twice; Wherein: when need carry out second passage cold rolling) then earlier to the hollow billet after cold rolling through first passage repeating step D successively, step e) and step F) operation, then carry out the cold rolling of second passage.
The technological parameter of the split rolling method of the present invention again more and among concrete embodiment, step G) is: the relative decrement 30-45% of section, external diameter drafts are that 10-30mm, wall thickness drafts are that 0.5-1.0mm, lengthening coefficient are that 1.4-1.8 and cold rolling feed are 3-5mm/ time.
One end length of the described heating in again of the present invention and then concrete embodiment, step H) is 130-200mm; Described control heating-up temperature is to be 900-1000 ℃ with heating and temperature control; The length of the control excision termination, two ends step J) is the flat chieftain of excision one end termination and the length 80-150mm of excision other end termination.
Technical scheme provided by the invention only needs the cold rolling of one or two passage and twice cold-drawn, thereby has reduced by three production passages with respect to prior art, thereby has shortened technological process significantly, and has outstanding energy-saving effect; Because the production passage obviously reduces, therefore can improve lumber recovery 8-10% with respect to prior art, satisfy the industrial amplification production requirement.
The specific embodiment
For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more; The applicant general elaborates with the mode of embodiment below; But the description to embodiment all is not the restriction to the present invention program, any according to the present invention design done only for pro forma but not substantial equivalent transformation all should be regarded as technical scheme category of the present invention.
Embodiment 1 (present embodiment is that the twice cogging is cold rolling):
With the processing cross-sectional dimensions is that the finished product specification is that the 2Cr13 rectangle tubing of long 33mm * wide 13mm * wall thickness 3.5mm is example.
A) get the raw materials ready; At first by the specification requirement of rectangular tube finished product preferably but not to select the diameter of being produced by Chinese Qinghai Province Xining special steel limited company for use be the 2Cr13 pole of 60mm with definitely being limited to, in the present embodiment, the cross-sectional area of the trimmed size of rectangle tubing is 1: 10.35 with the ratio of the cross-sectional area of pole; Selected pole is carried out surface treatment; Specifically: cut (industry is referred to as peeling) is carried out on the pole surface, use the micro-crack of removing the pole surface, the diameter that obtains after surface cut is processed is the pole base of 58.6mm; In the present embodiment, the degree of depth of cut is 0.7mm (< 60mm-58.6mm>÷ 2mm=0.7mm);
B) heating will be by steps A) the pole base that obtains sends into and is heated to 1150 ℃ in the Sloping Hearth Heating Furnace, goes out the wedged bottom stove, obtains waiting to bore a hole the pole base;
C) perforation; Will be by step B) waiting of the obtaining pole base of boring a hole causes the perforation hollow billet of boring a hole into 62 * 5 (external diameter is that 62mm and wall thickness are 5mm) on the Mannesmann piercing machine; In the present embodiment, the external diameter of perforation hollow billet is than the big 3.4mm of diameter of pole base, and the wall thickness of perforation hollow billet is 5mm;
D) annealing will be by step C) external diameter that obtains is that 62mm and wall thickness are that the perforation hollow billet of 5mm is sent into combustion type continuous annealing furnace annealing, annealing temperature is 780 ℃; Time is 50min; Annealing cools to the furnace below 650 ℃ after finishing, and the air cooling of coming out of the stove is the nature cooling, and two end-grain cutting of the hollow billet of after cooling off naturally, will boring a hole are flat; Specifically be that 20mm is respectively excised at the two ends of perforation hollow billet, obtain the hollow billet of annealing;
E) pickling; Will be by step D) the annealing hollow billet that obtains sends into pickling tube, and using mass percent concentration is 8% sulfuric acid solution pickling, and then after going out pickling tube, using mass percent concentration again is twice of 10% nitric acid liquid rinsing; The time of each rinsing is 2min, obtains the pickling pipe;
F) lubricated; To be applied in by step e equably by weight 1: 9 composite lubricant by butter and lime powder) outer surface of the pickling pipe that obtains and by step C) hole wall after the perforation; After smearing lubricant, send into the drying oven oven dry; The drying oven temperature is 200 ℃, and drying time is 30min, the hollow billet that obtains lubricating;
G) cold rolling; Will be by step F) the lubricated hollow billet that obtains is the circular pipe blank before 45mm and wall thickness are the abnormity distortion of 4.4mm becoming external diameter through the cogging cold rolling of first passage on the two-roll cold rolling mill; The cold rolling technological parameter of the cogging of first passage is: the relative decrement of section 37.3%, external diameter drafts 17mm, wall thickness drafts 0.6mm and lengthening coefficient 1.595 and cold rolling feed 4mm/ time; Accomplish the cold rolling back repeating step D of first passage) annealing operation; And through aligning and tack; Again through step e) and step F) carry out the cold rolling of second passage after the operation; Second passage cold rolling is to be that 45mm and wall thickness are that to be rolled into external diameter be that 34mm and wall thickness are the pipe before the abnormity distortion of 3.7mm for the circular pipe blank of 4.4mm with external diameter; The cold rolling technological parameter of this second passage is: the relative decrement of section 37.2%, external diameter drafts 11mm, and wall thickness drafts 0.7mm, lengthening coefficient 1.593 and cold rolling feed 4mm/ time obtain the pipe of cogging after second passage is cold rolling;
H) tup; Earlier to by step G) pipeline section of an end 150mm of the pipe 1 of the cogging that obtains is heated to 900 ℃; Again by the pneumatic hammer hammering of being furnished with the tup mould (promptly beating circular chieftain); And then circular chieftain is hammered into flat chieftain, then repeating step D), E) and operation F), obtain treating the cold-drawn pipe;
I) cold-drawn and finished products; Will be by step H) the cold-drawn pipe of treating that obtains is deformed into shape of cross section ovalize pipe through the first passage cold-drawn abnormity on drawbench; Repeating step D then) annealing, step e) pickling and step F) lubricated operation after; Carry out the second passage cold-drawn abnormity and be deformed into the rectangular rectangular tube of shape of cross section, then D set by step) operation carry out finished products, obtain 2Cr13 rectangular tube base just;
J) finishing; Corresponding to step I) the 2Cr13 rectangular tube that obtains just base put into straightener aligning and excision termination, two ends; Promptly excise the flat chieftain of an end and the 80mm length of the excision other end; Repeating step E once more) operation, obtaining trimmed size is that cross-sectional dimensions is: long 33mm, wide 13mm and wall thickness are the 2Cr13 rectangle tubing of 3.5mm.
Embodiment 2 (present embodiment is that one cogging is cold rolling):
With the processing cross-sectional dimensions is that the finished product specification is that the 2Cr13 rectangle tubing of long 44mm * wide 15mm * wall thickness 4.5mm is example.
A) get the raw materials ready; At first by the specification requirement of rectangular tube finished product preferably but not to select the diameter of being produced by Chinese Qinghai Province Xining special steel limited company for use be the 2Cr13 pole of 60mm with definitely being limited to, in the present embodiment, the cross-sectional area of the trimmed size of rectangle tubing is 1: 6.28 with the ratio of the cross-sectional area of pole; Selected pole is carried out surface treatment; Specifically: cut (industry is referred to as peeling) is carried out on the pole surface, use the micro-crack of removing the pole surface, the diameter that obtains after surface cut is processed is the pole base of 59.0mm; In the present embodiment, the degree of depth of cut is 0.5mm (< 60mm-59.0mm>÷ 2mm=0.5mm);
B) heating will be by steps A) the pole base that obtains sends into and is heated to 1165 ℃ in the Sloping Hearth Heating Furnace, goes out the wedged bottom stove, obtains waiting to bore a hole the pole base;
C) perforation; Will be by step B) waiting of the obtaining pole base of boring a hole causes the perforation hollow billet of boring a hole into 62 * 5.3 (external diameter is that 62mm and wall thickness are 5.3mm) on the Mannesmann piercing machine; In the present embodiment, the external diameter of perforation hollow billet is than the big 3mm of diameter of pole base, and the wall thickness of perforation hollow billet is 5.3mm;
D) annealing will be by step C) external diameter that obtains is that 62mm and wall thickness are that the perforation hollow billet of 5.3mm is sent into combustion type continuous annealing furnace annealing, annealing temperature is 800 ℃; Time is 60min; Annealing cools to the furnace below 650 ℃ after finishing, and the air cooling of coming out of the stove is the nature cooling, and two end-grain cutting of the hollow billet of after cooling off naturally, will boring a hole are flat; Specifically be that 30mm is respectively excised at the two ends of perforation hollow billet, obtain the hollow billet of annealing;
E) pickling; Will be by step D) the annealing hollow billet that obtains sends into pickling tube, using mass percent concentration is 12% sulfuric acid solution pickling, then after going out pickling tube, use again mass percent concentration be 15% nitric acid liquid rinsing once; The time of rinsing is 3min, obtains the pickling pipe;
F) lubricated; To be applied in by step e equably by weight 1: 10 composite lubricant by butter and lime powder) outer surface of the pickling pipe that obtains and by step C) hole wall after the perforation; After smearing lubricant, send into the drying oven oven dry; The drying oven temperature is 220 ℃, and drying time is 35min, the hollow billet that obtains lubricating;
G) cold rolling; Will be by step F) on two-roll cold rolling mill, to become external diameter through the cogging cold rolling of a passage be the circular pipe blank before 45mm and wall thickness are the abnormity distortion of 4.65mm for the lubricated hollow billet that obtains; The cold rolling technological parameter of cogging is: the relative decrement of section 37.6%, external diameter drafts 17mm, wall thickness drafts 0.65mm and lengthening coefficient 1.602 and cold rolling feed 3mm/ time obtain the pipe of cogging after having accomplished a passage cold rolling;
H) tup; Earlier to by step G) pipeline section of an end 180mm of the pipe of the cogging that obtains is heated to 950 ℃; By the pneumatic hammer hammering of being furnished with the tup mould, beat circular chieftain again, and then circular chieftain is hammered into flat chieftain; Repeating step D then), step e) and step F) operation, obtain treating the cold-drawn pipe;
I) cold-drawn and finished products; Will be by step H) the cold-drawn pipe of treating that obtains is deformed into shape of cross section ovalize pipe through the first passage cold-drawn abnormity on drawbench; Repeating step D then) annealing, step e) pickling, step F) lubricated operation after; Carry out the second passage cold-drawn abnormity and be deformed into the rectangular rectangular tube of shape of cross section, then D set by step) operation carry out finished products, obtain 2Cr13 rectangular tube base just;
J) finishing; Corresponding to step I) the first base flat chieftain that puts into the straightener aligning and excise an end respectively of the 2Cr13 rectangular tube that obtains; The 100mm length of the other end; Repeating step E once more) operation, obtaining trimmed size is that cross-sectional dimensions is: long 44mm, wide 15mm and wall thickness are the 2Cr13 rectangle tubing of 4.5mm.
Embodiment 3 (present embodiment is that one cogging is cold rolling):
With the processing cross-sectional dimensions is that the finished product specification is that the 2Cr13 rectangle tubing of long 55mm * wide 19mm * wall thickness 5mm is example.
A) get the raw materials ready; At first by the specification requirement of rectangular tube finished product preferably but not to select the diameter of being produced by Chinese Qinghai Province Xining special steel limited company for use be the 2Cr13 pole of 80mm with definitely being limited to, in the present embodiment, the cross-sectional area of the trimmed size of rectangle tubing is 1: 7.85 with the ratio of the cross-sectional area of pole; Selected pole is carried out surface treatment; Specifically: cut (industry is referred to as peeling) is carried out on the pole surface, use the micro-crack of removing the pole surface, the diameter that obtains after surface cut is processed is the pole base of 78.4mm; In the present embodiment, the degree of depth of cut is 0.8mm (< 80mm-78.4mm>÷ 2mm=0.8mm);
B) heating will be by steps A) the pole base that obtains sends into and is heated to 1180 ℃ in the Sloping Hearth Heating Furnace, goes out the wedged bottom stove, obtains waiting to bore a hole the pole base;
C) perforation; Will be by step B) waiting of the obtaining pole base of boring a hole causes the perforation hollow billet of boring a hole into 82 * 6.0 (external diameter is that 82mm and wall thickness are 6.0mm) on the Mannesmann piercing machine; In the present embodiment, the external diameter of perforation hollow billet is than the big 3.6mm of diameter of pole base, and the wall thickness of perforation hollow billet is 6.0mm;
D) annealing will be by step C) external diameter that obtains is that 82mm and wall thickness are that the perforation hollow billet of 6.0mm is sent into combustion type continuous annealing furnace annealing, annealing temperature is 820 ℃; Time is 70min; Annealing cools to the furnace below 650 ℃ after finishing, and the air cooling of coming out of the stove is the nature cooling, and two end-grain cutting of the hollow billet of after cooling off naturally, will boring a hole are flat; Specifically be that 30mm is respectively excised at the two ends of perforation hollow billet, obtain the hollow billet of annealing;
E) pickling; Will be by step D) the annealing hollow billet that obtains sends into pickling tube, using mass percent concentration is 15% sulfuric acid solution pickling, then after going out pickling tube, use again mass percent concentration be 18% nitric acid liquid rinsing once; The time of rinsing is 5min, obtains the pickling pipe;
F) lubricated; To be applied in by step e equably by weight 1: 11 composite lubricant by butter and lime powder) outer surface of the pickling pipe that obtains and by step C) hole wall after the perforation; After smearing lubricant, send into the drying oven oven dry; The drying oven temperature is 250 ℃, and drying time is 40min, the hollow billet that obtains lubricating;
G) cold rolling; Will be by step F) on two-roll cold rolling mill, to become external diameter through the cogging cold rolling of a passage be the circular pipe blank before 55mm and wall thickness are the abnormity distortion of 5.2mm for the lubricated hollow billet that obtains; The cold rolling technological parameter of cogging is: the relative decrement of section 43.2%, external diameter drafts 27mm, wall thickness drafts 0.8mm and lengthening coefficient 1.761 and cold rolling feed 5mm/ time obtain the pipe of cogging after having accomplished a passage cold rolling;
H) tup; Earlier to by step G) pipeline section of an end 200mm of the pipe of the cogging that obtains is heated to 1000 ℃; By the pneumatic hammer hammering of being furnished with the tup mould, beat circular chieftain again, and then circular chieftain is hammered into flat chieftain; Repeating step D then), step e) and step F) operation, obtain treating the cold-drawn pipe;
I) cold-drawn and finished products; Will be by step H) the cold-drawn pipe of treating that obtains is deformed into shape of cross section ovalize pipe through the first passage cold-drawn abnormity on drawbench; Repeating step D then) annealing, step e) pickling, step F) lubricated operation after; Carry out the second passage cold-drawn abnormity and be deformed into the rectangular rectangular tube of shape of cross section, then D set by step) operation carry out finished products, obtain 2Cr13 rectangular tube base just;
J) finishing; Corresponding to step I) the first base flat chieftain that puts into the straightener aligning and excise an end respectively of the 2Cr13 rectangular tube that obtains; The 120mm length of the other end; Repeating step E once more) operation, obtaining trimmed size is that cross-sectional dimensions is: long 55mm, wide 19mm and wall thickness are the 2Cr13 rectangle tubing of 5mm.
Claims (10)
1.
A kind of processing method of 2Cr13 rectangle tubing is characterized in that may further comprise the steps:
A) get the raw materials ready, at first choose the 2Cr13 pole with the ratio of the cross-sectional area of pole,, obtain the pole base again to the pole surface treatment by the cross-sectional area of the trimmed size of rectangle tubing;
B) heat, the pole base is sent in the heating furnace heated, and the control heating-up temperature, obtain waiting to bore a hole the pole base;
C) perforation, the pole base of will waiting to bore a hole is bored a hole on punch, obtains the hollow billet of boring a hole;
D) annealing furnace annealing is sent in annealing, the hollow billet of will boring a hole, and control annealing temperature and control annealing time; With the nature cooling of coming out of the stove after the stove cooling, and control with the stove chilling temperature, two end-grain cutting of the hollow billet of will boring a hole after the cooling naturally are flat; And the control two ends cut leveling ruler cun, obtain the hollow billet of annealing;
E) pickling, the hollow billet of will annealing are introduced pickling tube and are carried out pickling earlier with pickle, then use the acid solution rinsing, obtain the pickling pipe;
F) lubricated, lubricant is applied in the outer surface and the hole wall surface of pickling pipe equably, and sends into oven dry in the drying oven, control bake out temperature and time, the hollow billet that obtains lubricating;
G) cold rolling, lubricated hollow billet split rolling method on cold-rolling mill is become the circular pipe blank before abnormity is out of shape, and control the split rolling method passage, obtain the pipe of cogging;
H) tup, elder generation heats an end of the pipe of cogging, and the length of an end of control heating and control heating-up temperature, then hits circular chieftain by the pneumatic hammer of being furnished with the tup mould, more circular chieftain is hammered into flat chieftain, obtains treating the cold-drawn pipe;
I) cold-drawn and finished products; To treat that the cold-drawn pipe is deformed into shape of cross section ovalize pipe through the first passage cold-drawn abnormity on drawbench; Then at repeating step D successively) annealing, step e) pickling, step F) lubricated operation and step H) the tup operation after; Carry out the second passage cold-drawn abnormity again and be deformed into the rectangular rectangular tube of shape of cross section, then D set by step) operation carry out finished products, obtain 2Cr13 rectangular tube base just;
J) finishing is earlier to 2Cr13 rectangular tube just base aligning and excision termination, two ends, the length of control excision termination, two ends, then repeating step E) operation, obtain the 2Cr13 rectangular tube of finished product.
2. the processing method of
2Cr13 rectangle tubing according to claim 1 is characterized in that steps A) described in the ratio by the cross-sectional area of the trimmed size of rectangle tubing and the cross-sectional area of pole be 1: 5.5～10.5; Described surface treatment is meant cut is carried out on the pole surface to pole, and to remove the pole crizzle, the degree of depth of cut is 0.5-0.8 ㎜.
3. the processing method of
2Cr13 rectangle tubing according to claim 1 is characterized in that step B) described in heating furnace be Sloping Hearth Heating Furnace, described control heating-up temperature is to be 1150-1180 ℃ with heating and temperature control.
4. the processing method of
2Cr13 rectangle tubing according to claim 1; It is characterized in that step C) described in punch be two roller Mannesmann piercing mills, the external diameter of described perforation hollow billet is 4-8 ㎜ than the wall thickness of the big 1-4 ㎜ of diameter of said pole base and perforation hollow billet.
5. the processing method of
2Cr13 rectangle tubing according to claim 1 is characterized in that step D) described in annealing furnace be the combustion type continuous annealing furnace, described control annealing temperature is that annealing temperature is controlled to be 780-820 ℃; Described control annealing time is that annealing time is controlled to be 50-70min; Described control is that temperature is controlled to be below 650 ℃ with the stove chilling temperature; The leveling ruler of cutting at described control two ends cun is meant each the resection length 20～30mm of two ends to the perforation hollow billet.
6. the processing method of
2Cr13 rectangle tubing according to claim 1 is characterized in that step e) described in pickle be that mass percent concentration is the sulfuric acid solution of 8-15%; Described acid solution rinsing is the salpeter solution rinsing of 10-18% for adopting mass percent concentration, and the time of rinsing is 2-5min.
7. the processing method of
2Cr13 rectangle tubing according to claim 1 is characterized in that step F) described in lubricant be the mixture of butter and lime powder, wherein the weight ratio of butter and lime powder is 1: 9-11; Described control bake out temperature is that bake out temperature is controlled to be 200-250 ℃, and drying time is controlled to be 30-40min.
8. the processing method of
2Cr13 rectangle tubing according to claim 1; It is characterized in that step G) described in cold-rolling mill be two cold mills; Described control split rolling method passage is that the split rolling method passage is controlled to be once or twice; Wherein: when need carry out second passage cold rolling) then earlier to the hollow billet after cold rolling through first passage repeating step D successively, step e) and step F) operation, then carry out the cold rolling of second passage.
9. the processing method of
2Cr13 rectangle tubing according to claim 1 is characterized in that step G) described in the technological parameter of split rolling method be: the relative decrement 30-45% of section, external diameter drafts are that 10-30 ㎜, wall thickness drafts are that 0.5-1.0 ㎜, lengthening coefficient are that 1.4-1.8 and cold rolling feed are 3-5 ㎜/inferior.
10.
The processing method of 2Cr13 rectangle tubing according to claim 1 is characterized in that step H) described in an end length of described heating be 130-200 ㎜; Described control heating-up temperature is to be 900-1000 ℃ with heating and temperature control; The length of the control excision termination, two ends step J) is the flat chieftain of excision one end termination and the length 80-150 ㎜ of excision other end termination
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| CN104174687A (en) * | 2014-07-21 | 2014-12-03 | 苏州贝思特金属制品有限公司 | Production method of 15CrMo thick-wall seamless steel pipe |
| CN104353698A (en) * | 2014-10-20 | 2015-02-18 | 张家港市人和高精管有限公司 | Production technology of high pressure fuel pipe |
| CN103521548B (en) * | 2013-10-25 | 2016-06-08 | 安吉县鹏大钢管有限公司 | The preparation method of a kind of martensite steel pipe |
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| CN102716934A (en) * | 2012-06-18 | 2012-10-10 | 山西太钢不锈钢股份有限公司 | Method for forming large-diameter stainless steel square tube |
| CN103521548B (en) * | 2013-10-25 | 2016-06-08 | 安吉县鹏大钢管有限公司 | The preparation method of a kind of martensite steel pipe |
| CN104174687A (en) * | 2014-07-21 | 2014-12-03 | 苏州贝思特金属制品有限公司 | Production method of 15CrMo thick-wall seamless steel pipe |
| CN104353698A (en) * | 2014-10-20 | 2015-02-18 | 张家港市人和高精管有限公司 | Production technology of high pressure fuel pipe |
| CN109311071A (en) * | 2016-05-31 | 2019-02-05 | 瓦卢瑞克德国有限公司 | It is formed from steel and for producing with polygon, the method for especially rectangular or rectangular cross section elongate hollow body |
| WO2017207660A1 (en) * | 2016-05-31 | 2017-12-07 | Vallourec Deutschland Gmbh | Method for producing an elongated hollow body consisting of steel and having a polygonal, in particular square or rectangular, cross-section |
| CN109311071B (en) * | 2016-05-31 | 2024-03-08 | 瓦卢瑞克德国有限公司 | Method for producing an elongated hollow body made of steel and having a polygonal, in particular square or rectangular cross section |
| CN107335975A (en) * | 2017-07-19 | 2017-11-10 | 浙江义腾特种钢管有限公司 | A kind of tubular type film separation system stainless steel tube production technology |
| CN107335975B (en) * | 2017-07-19 | 2019-12-20 | 浙江义腾特种钢管有限公司 | Production process of stainless steel pipe for tubular membrane separation system |
| CN110643895A (en) * | 2018-06-27 | 2020-01-03 | 宝山钢铁股份有限公司 | Martensitic stainless steel oil casing and manufacturing method thereof |
| CN110643895B (en) * | 2018-06-27 | 2021-05-14 | 宝山钢铁股份有限公司 | Martensitic stainless steel oil casing and manufacturing method thereof |
| CN109664076A (en) * | 2018-12-30 | 2019-04-23 | 风范绿色建筑（常熟）有限公司 | A kind of production technology of the seamless square tube of high-precision |
| CN114211258A (en) * | 2021-11-04 | 2022-03-22 | 江阴市大久金属科技有限公司 | Preparation process of high-precision seamless steel pipe |
| CN114211258B (en) * | 2021-11-04 | 2023-09-26 | 江阴市大久金属科技有限公司 | Preparation process of high-precision seamless steel tube |
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