CN105987914B - Steel cord wire rod decarburization detection method - Google Patents
Steel cord wire rod decarburization detection method Download PDFInfo
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- CN105987914B CN105987914B CN201510061539.2A CN201510061539A CN105987914B CN 105987914 B CN105987914 B CN 105987914B CN 201510061539 A CN201510061539 A CN 201510061539A CN 105987914 B CN105987914 B CN 105987914B
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- decarburization
- wire rod
- steel cord
- cord wire
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Abstract
The invention discloses a kind of steel cord wire rod decarburization detection methods, comprising steps of being cleaned, inlaying, ground and being polished to the cross section of steel cord wire rod；To the nital etch of steel cord wire rod, until there is the visible texture of steel；The decarburization situation of steel cord wire rod is classified under metallographic microscope, measurement decarburization grade and measurement decarburization ratio and decarburized depth；Total decarburization score value of steel cord wire rod is calculated, total decarburization score value is 0-20, and wire rod decarbonization performance is outstanding；20-50 is good；50-100 is qualification；Greater than 100 improper cord productions；Total decarburization score value is equal to the sum of level-one decarburization score value, second level decarburization score value and three-level decarburization score value.Detection method more really reflects the decarburization level of steel cord wire rod in the present invention, provides a more efficiently index for production steel cord, facilitates " using the best steel to make the knife's edge ", realize the production of high-quality steel cord.
Description
Technical field
The present invention relates to machinery fields, more particularly, it relates to a kind of steel cord wire rod decarburization detection method.
Background technique
For steel cord wire rod, decarburization situation is to embody a very important factor of its quality good or not, therefore
The correct detection of wire rod decarburization situation is of great significance to steel cord production.Steel cord wire rod national standard GB/ at present
Only the depth of decarburization is required on T27691-2011, the concept of the average decarburized depth also only added in industry is but ignored
The influence of its degree and range, and in actual production, the meaning of this two indexs and depth is of equal importance.It is existing
Detection method can not be more horizontal than more actually reflecting the decarburization of steel cord wire rod, is unfavorable for the production of high-quality steel cord.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide a kind of steel cord wire rod decarburization detection sides
Method, the decarburization than more actually reflecting steel cord wire rod is horizontal, provides a more efficiently index for production steel cord,
Facilitate " using the best steel to make the knife's edge ", realizes the production of high-quality steel cord.
To solve the above problems, the technical solution adopted in the present invention is as follows:
Steel cord wire rod decarburization detection method, comprising steps of
1) cross section of steel cord wire rod is cleaned, is inlayed, ground and is polished；
2) to through step 1) treated steel cord wire rod nital etch, until there is the visible texture of steel；
3) the decarburization situation through step 2) treated steel cord wire rod is classified under metallographic microscope, measurement is de-
Carbon grade；The decarburization grade is divided into three-level, in which: ferrite occupied area ratio is being considered as 0%-20% in decarburization region
Level-one, decarburization weighted value are 1；Ferrite occupied area ratio is considered as second level, decarburization for 20%-70% in decarburization region
Weighted value is 4；The three-level that is considered as that ferrite occupied area ratio is 70%-100% in decarburization region, decarburization weighted value are 8；
4) decarburization ratio and decarburized depth through step 2) treated steel cord wire rod are measured under metallographic microscope；Its
In: decarburization ratio is each decarburization grade proportion on steel cord wire rod circumference；Decarburized depth is to contain from product surface to carbon
Amount is equal to the distance of that point of matrix carbon content, is equivalent on map and is equal to matrix rope from product surface to sorbite percentage
The distance of that point of family name's body content；
5) total decarburization score value of steel cord wire rod is calculated, total decarburization score value is 0-20, and wire rod decarbonization performance is outstanding；20-
50 be good；50-100 is qualification；Greater than 100 improper cord productions；Wherein:
Total decarburization score value is equal to the sum of level-one decarburization score value, second level decarburization score value and three-level decarburization score value；
Certain grade of decarburization score value is equal to the product of this grade of decarburization weighted value, decarburization ratio and decarburized depth.
Further, cleaning is ultrasonic cleaning in the step 1).
Further, nitric acid alcohol concentration is 3%-4% in the step 2).
Further, the etch time is 3-4s in the step 2).
Further, the step 3), 4) in use metallographic microscope resolution multiple for 500x.
Compared with prior art, the beneficial effects of the present invention are: this method has comprehensively considered decarburized depth, degree, range
Influence to it can obtain the detected value of a relatively wire rod true horizon, and going into operation to the classification of wire rod provides one and have
The reliable guiding opinion of effect, facilitates " using the best steel to make the knife's edge ", realizes the production of high-quality steel cord.
Detailed description of the invention
Fig. 1 is the decarburization map that decarburization grade is level-one in the present invention；
Fig. 2 is the decarburization map that decarburization grade is second level in the present invention；
Fig. 3 is the decarburization map that decarburization grade is three-level in the present invention；
Fig. 4 is 1 steel cord wire rod decarburization situation schematic diagram of embodiment in the present invention；
Fig. 5 is 2 steel cord wire rod decarburization situation schematic diagram of embodiment in the present invention.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description.
A kind of steel cord wire rod decarburization detection method, comprising steps of
1) cross section of steel cord wire rod is cleaned, is inlayed, ground and is polished；
2) to through step 1) treated steel cord wire rod nital etch, until there is the visible texture of steel；
3) the decarburization situation through step 2) treated steel cord wire rod is classified under metallographic microscope, measurement is de-
Carbon grade；The decarburization grade is divided into three-level, in which: ferrite occupied area ratio is being considered as 0%-20% in decarburization region
Level-one (as shown in Figure 1), decarburization weighted value are 1；Ferrite occupied area ratio is being considered as 20%-70% in decarburization region
Second level (as shown in Figure 2), decarburization weighted value are 4；Ferrite occupied area ratio is the view of 70%-100% in decarburization region
For three-level (as shown in Figure 3), decarburization weighted value is 8；
4) decarburization ratio and decarburized depth through step 2) treated steel cord wire rod are measured under metallographic microscope；Its
In: decarburization ratio is each decarburization grade proportion on steel cord wire rod circumference；Decarburized depth is to contain from product surface to carbon
Amount is equal to the distance of that point of matrix carbon content, is equivalent on map and is equal to matrix rope from product surface to sorbite percentage
The distance of that point of family name's body content；
5) total decarburization score value of steel cord wire rod is calculated, total decarburization score value is 0-20, and wire rod decarbonization performance is outstanding；20-
50 be good；50-100 is qualification；Greater than 100 improper cord productions；Wherein:
Total decarburization score value is equal to the sum of level-one decarburization score value, second level decarburization score value and three-level decarburization score value；
Certain grade of decarburization score value is equal to the product of this grade of decarburization weighted value, decarburization ratio and decarburized depth.
Embodiment 1
It is detected after taking steel cord wire rod to carry out carbonization treatment, comprising steps of
1) ultrasonic cleaning carried out to the cross section of steel cord wire rod, inlay, grind and polishes；
2) to the nital etch 3s for being 3% through step 1) treated steel cord wire rod concentration, to appearance
The visible texture of steel；
3) the decarburization situation through step 2) treated steel cord wire rod is classified under 500x metallographic microscope, is surveyed
Determine decarburization grade；
4) decarburization ratio and decarburization through step 2) treated steel cord wire rod are measured under the metallographic microscope of 500x
Depth；As shown in figure 4, level-one decarburized depth is 20 μm, decarburization ratio is 0.25；Second level decarburized depth is 30 μm, decarburization ratio
It is 0.125；Three-level decarburized depth is 20 μm, and decarburization ratio is 0.167；
5) total decarburization score value of steel cord wire rod is calculated, total decarburization score value is 1*0.25*20+4*0.125*30+8*
0.167*20=46.72 μm, which reaches the decarburization requirement of production steel cord.
Embodiment 2
It is detected after taking steel cord wire rod to carry out carbonization treatment, comprising steps of
1) ultrasonic cleaning carried out to the cross section of steel cord wire rod, inlay, grind and polishes；
2) to the nital etch 4s for being 4% through step 1) treated steel cord wire rod concentration, to appearance
The visible texture of steel；
3) the decarburization situation through step 2) treated steel cord wire rod is classified under 500x metallographic microscope, is surveyed
Determine decarburization grade；
4) decarburization ratio and decarburization through step 2) treated steel cord wire rod are measured under the metallographic microscope of 500x
Depth；As shown in figure 4, level-one decarburized depth is 15 μm, decarburization ratio is 0.208；Second level decarburized depth is 28 μm, decarburization ratio
It is 0.167；Three-level decarburized depth is 20 μm, and decarburization ratio is 0.167；
5) total decarburization score value of steel cord wire rod is calculated, total decarburization score value is 1*0.208*15+4*0.167*28+8*
0.167*20=48.544 μm, which reaches the decarburization requirement of production steel cord.
It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas
Corresponding change and deformation, and all these changes and deformation all should belong to the protection scope of the claims in the present invention
Within.
Claims (5)
1. steel cord wire rod decarburization detection method, which is characterized in that comprising steps of
1) cross section of steel cord wire rod is cleaned, is inlayed, ground and is polished；
2) to through step 1) treated steel cord wire rod nital etch, until there is the visible texture of steel；
3) the decarburization situation through step 2) treated steel cord wire rod is classified under metallographic microscope, measurement decarburization etc.
Grade；The decarburization grade is divided into three-level, in which: ferrite occupied area ratio is considered as one for 0%-20% in decarburization region
Grade, decarburization weighted value are 1；The second level that is considered as that ferrite occupied area ratio is 20%-70% in decarburization region, decarburization power
Weight values are 4；The three-level that is considered as that ferrite occupied area ratio is 70%-100% in decarburization region, decarburization weighted value are 8；
4) decarburization ratio and decarburized depth through step 2) treated steel cord wire rod are measured under metallographic microscope；Wherein:
Decarburization ratio is each decarburization grade proportion on steel cord wire rod circumference；Decarburized depth is from product surface to carbon content etc.
In the distance of that point of matrix carbon content, it is equivalent on map and is equal to matrix sorbite from product surface to sorbite percentage
The distance of that point of content；
5) total decarburization score value of steel cord wire rod is calculated, total decarburization score value is 0-20, and wire rod decarbonization performance is outstanding；20-50 is
Well；50-100 is qualification；Greater than 100 improper cord productions；Wherein:
Total decarburization score value is equal to the sum of level-one decarburization score value, second level decarburization score value and three-level decarburization score value；
Certain grade of decarburization score value is equal to the product of this grade of decarburization weighted value, decarburization ratio and decarburized depth.
2. steel cord wire rod decarburization detection method as described in claim 1, which is characterized in that cleaning is super in the step 1)
Sound wave cleaning.
3. steel cord wire rod decarburization detection method as described in claim 1, which is characterized in that nitric acid alcohol in the step 2)
Concentration is 3%-4%.
4. steel cord wire rod decarburization detection method as described in claim 1, which is characterized in that the etch time in the step 2)
For 3-4s.
5. steel cord wire rod decarburization detection method according to any one of claims 1-4, which is characterized in that the step 3),
4) metallographic microscope is used to differentiate multiple as 500x in.
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Citations (5)
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|---|---|---|---|---|
| JPH03108643A (en) * | 1989-06-02 | 1991-05-08 | Fuji Electric Co Ltd | Apparatus for inspecting metallic wiring for semiconductor device |
| US6440745B1 (en) * | 1994-10-18 | 2002-08-27 | Symyx Technologies | Combinatorial synthesis and screening of organometallic compounds and catalysts |
| CN101063676A (en) * | 2007-06-12 | 2007-10-31 | 北京交通大学 | Nondestructive detecting method of spring steel decarburized layer deepness |
| CN102212673A (en) * | 2011-06-07 | 2011-10-12 | 武汉钢铁(集团)公司 | Control method of decarburization of continuously cast bloom for spring steel wire rods |
| CN103934098A (en) * | 2014-05-15 | 2014-07-23 | 华东理工大学 | High-carbon pulverized coal ash/coal slag decarbonization and classification method and device |
-
2015
- 2015-02-05 CN CN201510061539.2A patent/CN105987914B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03108643A (en) * | 1989-06-02 | 1991-05-08 | Fuji Electric Co Ltd | Apparatus for inspecting metallic wiring for semiconductor device |
| US6440745B1 (en) * | 1994-10-18 | 2002-08-27 | Symyx Technologies | Combinatorial synthesis and screening of organometallic compounds and catalysts |
| CN101063676A (en) * | 2007-06-12 | 2007-10-31 | 北京交通大学 | Nondestructive detecting method of spring steel decarburized layer deepness |
| CN102212673A (en) * | 2011-06-07 | 2011-10-12 | 武汉钢铁(集团)公司 | Control method of decarburization of continuously cast bloom for spring steel wire rods |
| CN103934098A (en) * | 2014-05-15 | 2014-07-23 | 华东理工大学 | High-carbon pulverized coal ash/coal slag decarbonization and classification method and device |
Non-Patent Citations (1)
| Title |
|---|
| 高碳钢C72DA线材质量影响因素分析与控制;曹树卫 等;《中国冶金》;20101231;第36-40页 |
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