CN108254376A - A kind of fine steel decarburized layer deepness measuring method - Google Patents
A kind of fine steel decarburized layer deepness measuring method Download PDFInfo
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- CN108254376A CN108254376A CN201810005803.4A CN201810005803A CN108254376A CN 108254376 A CN108254376 A CN 108254376A CN 201810005803 A CN201810005803 A CN 201810005803A CN 108254376 A CN108254376 A CN 108254376A
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Abstract
The invention discloses a kind of fine steel decarburized layer deepness measuring methods, include the following steps：During fine steel development, the spheroidizing that different process is carried out using bell-type annealing online simulation device is heat-treated, and obtains the steel band sample of different decarburized layer deepness.The present invention can realize that quickly detection whether there is decarburization after often rolling up fine steel band spheroidizing, and know the depth of decarburized layer, the mass loss so as to avoid generating bigger is found early, simultaneously the test of development phase and the foundation of criteria table are once completed compared to existing metallographic method, in subsequent continuous production can with one minute less than time, detect the practical decarburized depth of different steel band positions, it greatly improves the efficiency, reduce cost of labor for company, while defective work is avoided to be sent to the loss that customers' place generates client's claim.Apparent benefit is brought to company to be promoted.
Description
Technical field
The present invention relates to a kind of fine steel decarburized layer deepness measuring methods.
Background technology
At present, fine is fine-edge blanking, and the part properties and size that fine comes out also have surface quality all very
Height can be used directly without carrying out secondary mechanical processing, therefore fine blanking technology plays very in auto parts manufacturing field
Big effect.Fine material has very big influence to the quality of fine blanking part.Result of study shows that the fine of high-quality is used
Cementite is preferably complete nodularization, Dispersed precipitate uniformly thin spheroidal structure in the metallographic structure of steel, therefore fine steel is before manufacture
It will carry out spheroidizing.Fine is with the most of use of steel in automobile industry.The fine parts of large-size are mainly used in
In transmission system, automobile gearbox, automotive seat and the security system of automobile, automobile brake system；The essence of reduced size
That rushes that part uses has automobile door lock, automobile glass lifter, automobile absorber etc.；Since these parts are directed to automobile
Safety problem in driving process, so fine steel is in the metallographic structure side of material composition control, dimensional accuracy and material
There are strict requirements in face.Because fine industry is started late in China, more demanding to raw material, the accessory size of manufacture compared with
Small, the kind of production is more, the smaller feature of batch, and finished product is arrived in few directly productions before big steel mill in native land.Mesh
Preceding China's fine with steel it is most coils of hot-rolled steel is produced by large-scale steel mill, then small-sized cold rolling mill passes through finish rolling and then nodularization
Annealing way produces.
Fine material has metallographic structure very high requirement, and identical chemical composition steel, heat treatment process is different, obtains
The metallographic structure of fine steel, tensile strength, hardness and the elongation percentage arrived is all different, and these factors are to the matter of fine part
The influence of amount is very crucial.Since fine steel band will pass through spheroidizing this procedure, if technique initialization in annealing process
Protective atmosphere has exception in unreasonable or annealing furnace, then can be there are the risk of decarburization, therefore fine steel band is needed in factory testing
Ensure the phenomenon that metallographic structure is there is no safety in utilization decarburization is influenced.Carbon steel can form ferrite lamellae in decarburization rear surface,
The depth for measuring decarburized layer is actually that measure the main method that ferritic depth uses at present be metallographic method to detect steel
Band practical decarburized depth, to confirm that steel band whether there is serious decarburization.But metallographic method operation is relatively complicated, while time-consuming longer,
To the more demanding of testing staff in operation, be not suitable in continuous flow procedure Site Detection personnel at any time to offline steel band into
The timely measurement of row decarburized layer deepness.There is presently no inquire relevant to detect decarburization thickness using surface layer ferrite content
The method of degree.
Invention content
The present invention seeks to provide a kind of fine steel decarburized layer deepness measuring method in view of the defects existing in the prior art.
The present invention to achieve the above object, adopts the following technical scheme that：A kind of fine steel decarburized layer deepness measuring method, packet
Include following steps：
1), during fine steel development, the nodularization that different process is carried out using bell-type annealing online simulation device is moved back
Burning hot processing, obtains the steel band sample of different decarburized layer deepness；
2) obtained steel band sample each averagely, is cut into two pieces respectively, carries out mark；A copy of it is first with moral
The ferrite content tester of Fei Xier companies of state production, the ferrite content measuring instrument are using magnetic conductance principle, and ferrite contains
Amount is confirmed using magnetic conductivity, can accurately measure radius 10mm, the ferrite content of depth 1mm range inner volume steel bands；Work as steel
Band is after spheroidizing, and steel strip surface occurs if there is decarburization phenomenon, then different depth in the range of the steel band of steel strip surface 1mm depths
The ferrite content of decarburized layer can be different, tested steel is on same straight line and continuous 3 inspections of interval 10mm between each other
The ferrite content of measuring point, and carry out the detailed record of each detection point data；
3) mark, is carried out into marking pen in above-mentioned test point position on the steel band tested, is cut using metallographic sample preparation
Steel band is cut the square sample that a width is 40mm by machine, and the one of side of the sample will be with testing in step 2)
The straight line parallel of three points and the edge of air line distance square sample have the distance of 1~2mm, while the both sides in three points
Point it is equal apart from square sample distance orthogonal and two edge with the straight line that three points are formed；
4) red, the green adhesive plaster of electrician that the steel band under above-mentioned cut is respectively 10mm with length, is parallel to three points,
And the edge of adhesive plaster and three points into straight line it is tangent, be attached to the point of steel band both the above edge as marker, write down it is red,
It is the ferrite content of which two point that green adhesive plaster is corresponding；
5), that side of red, the green adhesive plaster of electrician founds perpendicular to inlaying base the pedestal in pointing machine on sample
On, it pours into and inlays powder, auto_mosaicking is good；
6), the steel band inlayed is taken out, is polished on polished machine, observes and stops beating when red electrical adhesive tape
Mill, is then polished, is corroded after polished with a concentration of 4% nitric acid alcohol and metallographic；
7), the metallographic specimen corroded under metallographic microscope is measured to the decarburized layer deepness for carrying out that three points, done easy to remember
Record；
8), the thickness that will be measured measures the ferrite content come one-to-one correspondence with ferrite tester and establishes table；
9) different processing simulation spheroidizing, is taken to test the steel band containing different practical decarburized depths obtained, in repetition
The step of stating 2~8 obtains the corresponding ferrite percentage of decarburized layer that different-thickness occurs in the fine steel grade than relation with contents one by one
Corresponding list data；
10) surface is 1mm depth bounds when, summing up decarburized layer of the fine steel there are different-thickness according to list data
The percentage of interior ferrite content；
11), in produce reality checkout procedure, producing line employee only needs to detect the surface ferrite content after strip anneal,
The depth of the decarburized layer less than 1mm depths can be found.
Beneficial effects of the present invention：The present invention can realize quickly whether detection deposits after often rolling up fine steel band spheroidizing
In decarburization and know the depth of decarburized layer, find the mass loss so as to avoid generating bigger early, while compared to existing
Metallographic method once completes the test of development phase and the foundation of criteria table, and one point can be used in subsequent continuous production
Clock less than time, detect the practical decarburized depth of different steel band positions, greatly improve the efficiency, for company reduce manually into
This, while defective work is avoided to be sent to the loss that customers' place generates client's claim.Apparent benefit is brought to company to be promoted.
Description of the drawings
The main view schematic diagram of Fig. 1 present invention.
Specific embodiment
Shown in Fig. 1, a kind of fine steel decarburized layer deepness measuring method is disclosed, is included the following steps：
1), during fine steel development, the nodularization that different process is carried out using bell-type annealing online simulation device is moved back
Burning hot processing, obtains the steel band sample of different decarburized layer deepness；
2) obtained steel band sample each averagely, is cut into two pieces respectively, carries out mark；A copy of it is first with moral
The ferrite content tester of Fei Xier companies of state production, the ferrite content measuring instrument are using magnetic conductance principle, and ferrite contains
Amount is confirmed using magnetic conductivity, can accurately measure radius 10mm, the ferrite content of depth 1mm range inner volume steel bands；Work as steel
Band is after spheroidizing, and steel strip surface occurs if there is decarburization phenomenon, then different depth in the range of the steel band of steel strip surface 1mm depths
The ferrite content of decarburized layer can be different, tested steel is on same straight line and continuous 3 inspections of interval 10mm between each other
The ferrite content of measuring point, and carry out the detailed record of each detection point data；
3) mark, is carried out into marking pen in above-mentioned test point position on the steel band tested, is cut using metallographic sample preparation
Steel band is cut the square sample that a width is 40mm by machine, and the one of side of the sample will be with testing in step 2)
The straight line parallel of three points and the edge of air line distance square sample have the distance of 1~2mm, while the both sides in three points
Point it is equal apart from square sample distance orthogonal and two edge with the straight line that three points are formed；
4) red, the green adhesive plaster of electrician that the steel band under above-mentioned cut is respectively 10mm with length, is parallel to three points,
And the edge of adhesive plaster and three points into straight line it is tangent, be attached to the point of steel band both the above edge as marker, write down it is red,
It is the ferrite content of which two point that green adhesive plaster is corresponding；
5), that side of red, the green adhesive plaster of electrician founds perpendicular to inlaying base the pedestal in pointing machine on sample
On, it pours into and inlays powder, auto_mosaicking is good；
6), the steel band inlayed is taken out, is polished on polished machine, observes and stops beating when red electrical adhesive tape
Mill, is then polished, is corroded after polished with a concentration of 4% nitric acid alcohol and metallographic；
7), the metallographic specimen corroded under metallographic microscope is measured to the decarburized layer deepness for carrying out that three points, done easy to remember
Record；
8), the thickness that will be measured measures the ferrite content come one-to-one correspondence with ferrite tester and establishes table；
9) different processing simulation spheroidizing, is taken to test the steel band containing different practical decarburized depths obtained, in repetition
The step of stating 2~8 obtains the corresponding ferrite percentage of decarburized layer that different-thickness occurs in the fine steel grade than relation with contents one by one
Corresponding list data；
10) surface is 1mm depth bounds when, summing up decarburized layer of the fine steel there are different-thickness according to list data
The percentage of interior ferrite content；
11), in produce reality checkout procedure, producing line employee only needs to detect the surface ferrite content after strip anneal,
The depth of the decarburized layer less than 1mm depths can be found.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (1)
1. a kind of fine steel decarburized layer deepness measuring method, which is characterized in that include the following steps：
1), during fine steel development, the spheroidizing heat of different process is carried out using bell-type annealing online simulation device
Processing, obtains the steel band sample of different decarburized layer deepness；
2) obtained steel band sample each averagely, is cut into two pieces respectively, carries out mark；A copy of it is first with German luxuriant and rich with fragrance
The ferrite content tester of Xi Er companies production, the ferrite content measuring instrument are using magnetic conductance principle, ferrite content profit
Confirmed with magnetic conductivity, can accurately measure radius 10mm, the ferrite content of depth 1mm range inner volume steel bands；When steel band exists
After spheroidizing, steel strip surface if there is decarburization phenomenon occur, then in the range of the steel band of steel strip surface 1mm depth different depth take off
The ferrite content of carbon-coating can be different, and tested steel is on same straight line and between each other continuous 3 test points of interval 10mm
Ferrite content, and carry out it is each detection point data detailed record；
3) mark, is carried out into above-mentioned test point position with marking pen on the steel band tested, it will using metallographic sample preparation cutting machine
Steel band cuts the square sample that a width is 40mm, and the one of side of the sample will be with three of test in step 2)
The straight line parallel of a point and the edge of air line distance square sample have the distance of 1~2mm, while the point on the both sides in three points
It is equal apart from square sample distance orthogonal and two edge with the straight line that three points are formed；
4) red, the green adhesive plaster of electrician that the steel band under above-mentioned cut is respectively 10mm with length, is parallel to three points, and glue
The edge of cloth and three points into straight line it is tangent, be attached to the point of steel band both the above edge as marker, write down red, green
It is the ferrite content of which two point that adhesive plaster is corresponding；
5), that side that sample has red, the green adhesive plaster of electrician is stood perpendicular to inlaying base on the pedestal of pointing machine,
Enter and inlay powder, auto_mosaicking is good；
6), the steel band inlayed is taken out, is polished on polished machine, stops polishing when observing red electrical adhesive tape, so
After be polished, corroded after polished with a concentration of 4% nitric acid alcohol and metallographic；
7), the metallographic specimen corroded under metallographic microscope is measured to the decarburized layer deepness for carrying out that three points, made a record；
8), the thickness that will be measured measures the ferrite content come one-to-one correspondence with ferrite tester and establishes table；
9) steel band containing different practical decarburized depths that different processing simulation spheroidizing experiments, is taken to obtain, repetition above-mentioned 2~
8 the step of, obtains the corresponding ferrite percentage of decarburized layer that different-thickness occurs in the fine steel grade and is corresponded than relation with contents
List data；
10) surface is in 1mm depth bounds when, summing up decarburized layer of the fine steel there are different-thickness according to list data
The percentage of ferrite content；
11), in produce reality checkout procedure, producing line employee only needs to detect the surface ferrite content after strip anneal, so that it may
To find the depth for the decarburized layer for being less than 1mm depths.
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Citations (5)
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| CN1441247A (en) * | 2002-02-12 | 2003-09-10 | 山阳特殊制钢株式会社 | Non-destructive detection method and used device for steel product using eddy flow |
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| CN101769835A (en) * | 2010-01-20 | 2010-07-07 | 胡先根 | Sample preparation method of oxygen content measurement of steels |
| CN104359726A (en) * | 2014-10-11 | 2015-02-18 | 南京钢铁股份有限公司 | Testing method for rapidly measuring decarburized layer after water passing |
| CN105987914A (en) * | 2015-02-05 | 2016-10-05 | 张家港市骏马钢帘线有限公司 | Method for detecting decarburization of steel cord wire rod |
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2018
- 2018-01-03 CN CN201810005803.4A patent/CN108254376B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441247A (en) * | 2002-02-12 | 2003-09-10 | 山阳特殊制钢株式会社 | Non-destructive detection method and used device for steel product using eddy flow |
| CN101063676A (en) * | 2007-06-12 | 2007-10-31 | 北京交通大学 | Nondestructive detecting method of spring steel decarburized layer deepness |
| CN101769835A (en) * | 2010-01-20 | 2010-07-07 | 胡先根 | Sample preparation method of oxygen content measurement of steels |
| CN104359726A (en) * | 2014-10-11 | 2015-02-18 | 南京钢铁股份有限公司 | Testing method for rapidly measuring decarburized layer after water passing |
| CN105987914A (en) * | 2015-02-05 | 2016-10-05 | 张家港市骏马钢帘线有限公司 | Method for detecting decarburization of steel cord wire rod |
Non-Patent Citations (4)
| Title |
|---|
| 张励忠 等: "弹簧钢脱碳层深度的无损检测", 《北京交通大学学报》 * |
| 李慧 等: "几种常用的脱碳层深度测定方法", 《理化检验-物理分册》 * |
| 陈晓泉: "《钢的脱碳层深度测定法》标准浅析", 《物理测试》 * |
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Effective date of registration: 20230301 Address after: 225400 Tongzhan Road, Huangqiao Industrial Park, Taixing City, Jiangsu Province Patentee after: JIANGSU NINESKY OPTOELECTRONICS TECHNOLOGY CO.,LTD. Patentee after: ZHENJIANG DONGFANG ELECTRIC HEATING TECHNOLOGY CO.,LTD. Address before: Tongzhan Road, Huangqiao Industrial Park, Taizhou City, Jiangsu Province 214200 Patentee before: JIANGSU NINESKY OPTOELECTRONICS TECHNOLOGY CO.,LTD. |