CN110031347A - A method of measurement spring steel wire rod segregation - Google Patents
A method of measurement spring steel wire rod segregation Download PDFInfo
- Publication number
- CN110031347A CN110031347A CN201910261872.6A CN201910261872A CN110031347A CN 110031347 A CN110031347 A CN 110031347A CN 201910261872 A CN201910261872 A CN 201910261872A CN 110031347 A CN110031347 A CN 110031347A
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- China
- Prior art keywords
- wire rod
- segregation
- spring steel
- hardness
- sample
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
- G01N33/202—Constituents thereof
- G01N33/2028—Metallic constituents
Abstract
A kind of method that the present invention discloses quantitative determination spring steel wire rod segregation, includes the following steps: that a carries out wire cutting along vertical wire rod rolling direction, then corrodes sample；Then the blackening point that b looks for wire rod transverse direction metallographic phase sample center color most deep measures the HV1 hardness at this using micro-vickers hardness instrument, be then both horizontally and vertically successively spaced 0.5mm~1mm measurement HV1 hardness until measurement to sample edge along by the point；It is very poor that c calculates HV1.
Description
Technical field
The invention belongs to field of steel metallurgy, are related to a kind of with the very poor side to measure spring steel wire rod segregation of HV1 hardness
Method.
Background technique
Segregation is to measure one of the important technology index of spring steel wire rod metallurgical quality quality, is segregated the height of controlled level
Directly affect the fatigue life length for being finally made spring.The center of wire rod is generally all provided in spring steel wire rod technical protocol
Segregation.The evaluation method of center segregation is mainly according to GB/T19530 appendix A or YB/T5365 appendix A, both evaluation method roots
It grades according to normal segregation rank map, subjective factor is larger, and does not quantify.
Summary of the invention
It is an object of the invention to propose a kind of method of measurement spring steel wire rod segregation that can quantify.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A method of measurement spring steel wire rod segregation, it is characterised in that include the following steps:
A carries out wire cutting along vertical wire rod rolling direction, then corrodes sample；
Then the blackening point that b looks for wire rod transverse direction metallographic phase sample center color most deep is measured at this using micro-vickers hardness instrument
HV1 hardness, then along by the point both horizontally and vertically successively interval 0.5mm~1mm measurement HV1 hardness until measurement
To sample edge；
It is very poor that c calculates HV1.
The erosion sample uses nital.
With the height of HV1 very poor size characterization segregation controlled level, very poor big segregation is big, otherwise segregation is small.
The method of measurement spring steel wire rod segregation of the invention, realizes the segregation of quantitative determination spring steel wire rod.
Specific embodiment
It is illustrated combined with specific embodiments below:
By taking 55SiCr as an example, table 1 is that A steel mill, B steel mill, C steel mill and D steel mill 55SiCr wire rod HV1 hardness are very poor.By table 1
As can be seen that A steel mill, B steel mill, C steel mill and D steel mill 55SiCr wire rod segregation controlled level successively reduce.
1 each producer 55SiCr wire rod cross section HV1 hardness of table is very poor
| Steel mill | Minimum value | Maximum value | HV1 is very poor |
| A | 241.4 | 273.6 | 32.2 |
| B | 229.8 | 270.7 | 40.9 |
| C | 229.9 | 291.0 | 61.1 |
| D | 172.3 | 251.8 | 79.5 |
Claims (2)
1. a kind of method of measurement spring steel wire rod segregation, it is characterised in that include the following steps:
A carries out wire cutting along vertical wire rod rolling direction, then corrodes sample；
Then the blackening point that b looks for wire rod transverse direction metallographic phase sample center color most deep measures the HV1 at this using micro-vickers hardness instrument
Then hardness measures HV1 hardness until measurement to examination along the 0.5mm~1mm that is both horizontally and vertically successively spaced for passing through the point
Sample edge；
It is very poor that c calculates HV1.
2. the method for measurement spring steel wire rod segregation according to claim 1, it is characterised in that: the erosion sample uses
Nital.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910261872.6A CN110031347A (en) | 2019-04-02 | 2019-04-02 | A method of measurement spring steel wire rod segregation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910261872.6A CN110031347A (en) | 2019-04-02 | 2019-04-02 | A method of measurement spring steel wire rod segregation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110031347A true CN110031347A (en) | 2019-07-19 |
Family
ID=67237275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910261872.6A Pending CN110031347A (en) | 2019-04-02 | 2019-04-02 | A method of measurement spring steel wire rod segregation |
Country Status (1)
| Country | Link |
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| CN (1) | CN110031347A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646306A (en) * | 2019-11-06 | 2020-01-03 | 湖南华菱湘潭钢铁有限公司 | Method for evaluating segregation of continuous casting billet through hardness |
| CN113567281A (en) * | 2021-06-22 | 2021-10-29 | 武汉钢铁有限公司 | Method for quantitatively characterizing center segregation of medium-high carbon wire rod |
Citations (6)
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| CN102665963A (en) * | 2009-12-21 | 2012-09-12 | Posco公司 | Martensitic stainless steel and a production method therefor |
| CN102954976A (en) * | 2011-08-19 | 2013-03-06 | 鞍钢股份有限公司 | Method for quantitatively examining center segregations of wire rod |
| CN102978355A (en) * | 2012-11-30 | 2013-03-20 | 张家港浦项不锈钢有限公司 | Thermal annealing method for martensite stainless steel, and stainless steel manufactured therefrom |
| CN103781928A (en) * | 2011-10-20 | 2014-05-07 | 浦项工科大学校产学协力团 | Non-heat treated magnesium alloy sheet with excellent formability at room temperature in which segregation is minimized |
| CN104535737A (en) * | 2014-12-19 | 2015-04-22 | 钢铁研究总院 | Statistical distribution analysis mapping characterization method for original material position |
| CN107290199A (en) * | 2017-08-10 | 2017-10-24 | 南京钢铁股份有限公司 | A kind of method that utilization electron probe quickly characterizes bearing steel segregation |
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2019
- 2019-04-02 CN CN201910261872.6A patent/CN110031347A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102665963A (en) * | 2009-12-21 | 2012-09-12 | Posco公司 | Martensitic stainless steel and a production method therefor |
| CN102954976A (en) * | 2011-08-19 | 2013-03-06 | 鞍钢股份有限公司 | Method for quantitatively examining center segregations of wire rod |
| CN103781928A (en) * | 2011-10-20 | 2014-05-07 | 浦项工科大学校产学协力团 | Non-heat treated magnesium alloy sheet with excellent formability at room temperature in which segregation is minimized |
| CN102978355A (en) * | 2012-11-30 | 2013-03-20 | 张家港浦项不锈钢有限公司 | Thermal annealing method for martensite stainless steel, and stainless steel manufactured therefrom |
| CN104535737A (en) * | 2014-12-19 | 2015-04-22 | 钢铁研究总院 | Statistical distribution analysis mapping characterization method for original material position |
| CN107290199A (en) * | 2017-08-10 | 2017-10-24 | 南京钢铁股份有限公司 | A kind of method that utilization electron probe quickly characterizes bearing steel segregation |
Non-Patent Citations (2)
| Title |
|---|
| 任润清 等: "钢丝质量与盘条标准", 《金属制品》 * |
| 王荣: "2CrＭoA钢制内齿圈开裂失效分析", 《机械工程材料》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646306A (en) * | 2019-11-06 | 2020-01-03 | 湖南华菱湘潭钢铁有限公司 | Method for evaluating segregation of continuous casting billet through hardness |
| CN113567281A (en) * | 2021-06-22 | 2021-10-29 | 武汉钢铁有限公司 | Method for quantitatively characterizing center segregation of medium-high carbon wire rod |
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Application publication date: 20190719 |