CN105334087A - Displaying method of austenite grain boundaries after quenching of sawing wire high carbon steel - Google Patents
Displaying method of austenite grain boundaries after quenching of sawing wire high carbon steel Download PDFInfo
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- CN105334087A CN105334087A CN201510673681.2A CN201510673681A CN105334087A CN 105334087 A CN105334087 A CN 105334087A CN 201510673681 A CN201510673681 A CN 201510673681A CN 105334087 A CN105334087 A CN 105334087A
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Abstract
The invention discloses a displaying method of austenite grain boundaries after quenching of sawing wire high carbon steel, and belongs to the field of austenite grain boundaries displaying technology. The displaying method comprises following steps: sawing wire samples obtained via flow line production are subjected direct quenching in a cooling liquid; after cooling, the cross sections of the sawing wire samples are grinded to be flat, and the sawing wire samples are vertically arranged on a lower mould of a pointing machine, an inserting powder is added for inserting so as to obtain inserted sample blocks; the inserted sample blocks are subjected to sample preparation based on a metallographic structure detection method so as to obtain samples; a supersaturated picric acid solution is prepared, and is heated, the samples are immersed into the heated supersaturated picric acid solution for etching; and after etching, the samples are polished using velvet polishing cloth, and then clear austenite grain boundaries can be observed under microscopes. According to the displaying method, direct sampling from production lines can be realized, separated preparing and heat treatment of samples are not necessary, the displayed austenite grain boundaries are clear, and software direct rating can be realized.
Description
Technical field
The invention belongs to austenite grain boundary display technique field, be specifically related to the display packing of the rear austenite grain boundary of cutting steel wire high-carbon steel quenching.
Background technology
Cutting steel wire is the high-performance steel wire with silicon chip cutting, is one of metal wire rod deep processing high-end product, also proposes higher requirement to the performance of wire rod.
Austenite (Austenite) is the microstructure of a kind of lamellar of iron and steel, there are some researches show, autstenitic grain size size, i.e. one of refined crystalline strengthening important strengthening approach being considered steel.For cutting steel wire high-carbon steel wire rod, obtain thick transmutation product after thick austenite crystal cooling, its mechanical property is poor, is unfavorable for the drawing of steel wire.And accurately show and measure the performance of austenite grain size to the structural transformation rule in research high-carbon steel production run, conservative control thermal deformation and heat treatment process parameter and raising product and all have very important significance.
Can austenite crystal be shown clearly, depends on the many factors such as the chemical composition of sample, Technology for Heating Processing, etch time.Its display packing has multiple, in order to show austenite grain boundary after general steel quenching, all to carry out average tempering process to sample, and there is no the technology of the rear austenite grain boundary of direct etch high-carbon steel quenching, therefore, this technology is for directly etch after the quenching of cutting steel wire high-carbon steel, obtains the technology of the austenite grain boundary of optimum efficiency.
Summary of the invention
Goal of the invention: the display packing of austenite grain boundary after the object of the present invention is to provide cutting steel wire high-carbon steel to quench, can directly from sampling and testing production line, do not need to make separately and heat treated sample, do not need to carry out average tempering after sample quenching and just etch can go out austenite grain boundary clearly, the austenite grain boundary of display is clear.
Technical scheme: for achieving the above object, the present invention adopts following technical scheme:
The cutting steel wire display packing of austenite grain boundary after high-carbon steel quenching, comprises the steps:
1) the cutting steel wire sample of production line balance is directly quenched in liquid coolant;
2) polished by cutting steel wire example cross section after cooling, vertical pendulum is placed on pointing machine counterdie, pours into and inlays powder and inlay, obtain the sample block inlayed;
3) by the sample block inlayed according to the sample preparation of metallographic structure detection method, obtain the sample made;
4) supersaturation picric acid solution is prepared;
5) supersaturation picric acid solution is heated, the sample made is put into the solution etch of heating;
6) take out sample and after polishing, under microscope, namely can be observed austenite grain boundary clearly on velvet polishing cloth.
Step 3) in, described metallographic structure detects method for making sample, comprises the steps:
A) with 320 order abrasive paper for metallograph along a fixed-direction ground sample, only have this direction cut to sample surfaces;
B) sample grinding direction operation a) processed turns clockwise 90 °, and with 800 order abrasive paper for metallograph grindings, cut a) produced to operation is completely covered;
C) by operation b) sample that processed grinding direction turns clockwise 90 °, grind, to operation b with 2000 order abrasive paper for metallograph) cut that produces is completely covered;
D) by operation c) sample that processed grinding direction turns clockwise 90 °, grind, to operation c with 3000 order abrasive paper for metallograph) cut that produces is completely covered;
E) by operation d) sample that processed grinding direction turns clockwise 90 °, carries out polishing with velvet polishing cloth to sample surfaces; Under metaloscope 500 times of enlargement ratios, observe sample surfaces, sample surfaces without obvious cut.
Step 4) in, preparation supersaturation picric acid solution takes 5g ~ 7g frohde test solution, is dissolved in 80ml pure water and stirs and get final product.
Step 4) in, preparation supersaturation picric acid solution also comprises and adds 20ml ~ 25ml alkyl sodium sulfonate.
Step 5) in, the described etch time is 10min ~ 12min.
Step 5) in, described supersaturation picric acid solution heating-up temperature is more than or equal to 70 DEG C.
Step 6) in, the time of described polishing is 3s ~ 5s.
Beneficial effect: compared with prior art, the display packing of austenite grain boundary after cutting steel wire high-carbon steel quenching of the present invention, test sample and can directly sample from production line, do not need to make separately and heat treated sample, do not need to carry out average tempering after sample quenching and just etch can go out austenite grain boundary clearly, the austenite grain boundary of display is clear, available software is directly graded, very convenient, method simple and fast of the present invention, possesses good practicality.
Accompanying drawing explanation
Fig. 1 is that schematic diagram put by test sample;
Fig. 2 is the picture of metaloscope shooting after the display packing process of prior art;
Fig. 3 is the picture that after solution is heated to 70 DEG C of the inventive method process, metaloscope is taken;
Fig. 4 is the picture that after solution is heated to 90 DEG C of the inventive method process, metaloscope is taken;
Fig. 5 is the picture that after solution is heated to the process of boiling the inventive method, metaloscope is taken.
Fig. 6 utilizes Survey Software to carry out survey sheet to sample autstenitic grain size.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
Fig. 2 ~ 5 are all taken by Olympus GX51 type metaloscope, amplify 500 times and obtain.
The cutting steel wire display packing of austenite grain boundary after high-carbon steel quenching, comprises the steps:
1) the cutting steel wire sample of production line balance is directly quenched in liquid coolant;
2) as shown in Figure 1, polished by cutting steel wire example cross section after cooling, vertical pendulum is placed on pointing machine counterdie, pours into inlay powder and inlay, and obtains the sample block inlayed;
3) by the sample block inlayed according to the sample preparation of metallographic structure detection method, obtain the sample made;
4) supersaturation picric acid solution is prepared: take 5g ~ 7g frohde test solution, be dissolved in 80ml pure water, add 20ml ~ 25ml alkyl sodium sulfonate, stir;
5) supersaturation picric acid solution is heated, the sample made is put into the solution etch 10min ~ 12min of heating;
6), after taking-up sample gently throws 3s ~ 5s on velvet polishing cloth, under microscope, namely can be observed austenite grain boundary clearly.
Metallographic structure detects method for making sample:
A) with 320 order abrasive paper for metallograph along a fixed-direction ground sample, only have this direction cut to sample surfaces;
B) sample grinding direction operation a) processed turns clockwise 90 °, and with 800 order abrasive paper for metallograph grindings, cut a) produced to operation is completely covered;
C) by operation b) sample that processed grinding direction turns clockwise 90 °, grind, to operation b with 2000 order abrasive paper for metallograph) cut that produces is completely covered;
D) by operation c) sample that processed grinding direction turns clockwise 90 °, grind, to operation c with 3000 order abrasive paper for metallograph) cut that produces is completely covered;
E) by operation d) sample that processed grinding direction turns clockwise 90 °, carries out polishing with velvet polishing cloth to sample surfaces; Under metaloscope 500 times of enlargement ratios, observe sample surfaces, sample surfaces without obvious cut.
Embodiment 1
The cutting steel wire display packing of austenite grain boundary after high-carbon steel quenching, comprises the steps:
1) the cutting steel wire sample of production line balance is directly quenched in liquid coolant;
As shown in Figure 1, polished by cutting steel wire example cross section after cooling, vertical pendulum is placed on pointing machine counterdie, pours into inlay powder and inlay, and obtains the sample block inlayed;
2) by the sample block inlayed according to the sample preparation of metallographic structure detection method, obtain the sample made;
3) supersaturation picric acid solution is prepared: take 5g frohde test solution, be dissolved in 80ml pure water, add 20ml alkyl sodium sulfonate, stir;
4) supersaturation picric acid solution is heated to 70 DEG C, the sample made is put into the solution etch 10min of heating;
5), after taking-up sample gently throws 3s ~ 5s on velvet polishing cloth, as shown in Figure 3, namely can be observed austenite grain boundary under microscope, is not just very clear.
Embodiment 2
The cutting steel wire display packing of austenite grain boundary after high-carbon steel quenching, comprises the steps:
1) the cutting steel wire sample of production line balance is directly quenched in liquid coolant;
2) as shown in Figure 1, polished by cutting steel wire example cross section after cooling, vertical pendulum is placed on pointing machine counterdie, pours into inlay powder and inlay, and obtains the sample block inlayed;
3) by the sample block inlayed according to the sample preparation of metallographic structure detection method, obtain the sample made;
4) supersaturation picric acid solution is prepared: take 6g frohde test solution, be dissolved in 80ml pure water, add 22ml alkyl sodium sulfonate, stir;
5) supersaturation picric acid solution is heated to 90 DEG C, the sample made is put into the solution etch 11min of heating;
6) take out sample on velvet polishing cloth after light throwing 3s, as shown in Figure 4, namely can be observed austenite grain boundary under microscope, is not just very clear, slightly more clear than Fig. 3.
Embodiment 3
The cutting steel wire display packing of austenite grain boundary after high-carbon steel quenching, comprises the steps:
1) the cutting steel wire sample of production line balance is directly quenched in liquid coolant;
2) as shown in Figure 1, polished by cutting steel wire example cross section after cooling, vertical pendulum is placed on pointing machine counterdie, pours into inlay powder and inlay, and obtains the sample block inlayed;
3) by the sample block inlayed according to the sample preparation of metallographic structure detection method, obtain the sample made;
4) supersaturation picric acid solution is prepared: take 7g frohde test solution, be dissolved in 80ml pure water, add 25ml alkyl sodium sulfonate, stir;
5) supersaturation picric acid solution is heated to 90 DEG C, the sample made is put into the solution etch 12min of heating;
6) take out sample on velvet polishing cloth after light throwing 3s, as shown in Figure 5, namely can be observed very clear austenite grain boundary under microscope, solution is heated to boiling, and the austenite grain boundary that etch goes out is clear and legible.As shown in Figure 6, can Survey Software be utilized to measure sample autstenitic grain size by direct Fig. 6.And in Fig. 2, the picture of metaloscope shooting after the display packing process of prior art, do not manifest austenite grain boundary at all, this is because the display packing of prior art, the cutting steel wire sample of production line balance is directly quenched in liquid coolant and so directly carries out follow-up detection, can not get effect of the present invention, traditional method, need to carry out temper etc. to cutting steel wire sample, bother very much.
To sum up, after cutting steel wire high-carbon steel quenching of the present invention, the display packing of austenite grain boundary, simple and reliable.In the present invention, the heating-up temperature of supersaturation picric acid solution has vital role to test findings, and applicant finds that the display effect of supersaturation picric acid solution to austenite grain boundary after boiling is best.
Claims (7)
1. the cutting steel wire display packing of austenite grain boundary after high-carbon steel quenching, is characterized in that, comprise the steps:
1) the cutting steel wire sample of production line balance is directly quenched in liquid coolant;
2) polished by cutting steel wire example cross section after cooling, vertical pendulum is placed on pointing machine counterdie, pours into and inlays powder and inlay, obtain the sample block inlayed;
3) by the sample block inlayed according to the sample preparation of metallographic structure detection method, obtain the sample made;
4) supersaturation picric acid solution is prepared;
5) supersaturation picric acid solution is heated, the sample made is put into the solution etch of heating;
6) take out sample and after polishing, under microscope, namely can be observed austenite grain boundary clearly on velvet polishing cloth.
2. the display packing of the rear austenite grain boundary of cutting steel wire high-carbon steel quenching according to claim 1, is characterized in that: step 3) in, described metallographic structure detects method for making sample, comprises the steps:
A) with 320 order abrasive paper for metallograph along a fixed-direction ground sample, only have this direction cut to sample surfaces;
B) sample grinding direction operation a) processed turns clockwise 90 °, and with 800 order abrasive paper for metallograph grindings, cut a) produced to operation is completely covered;
C) by operation b) sample that processed grinding direction turns clockwise 90 °, grind, to operation b with 2000 order abrasive paper for metallograph) cut that produces is completely covered;
D) by operation c) sample that processed grinding direction turns clockwise 90 °, grind, to operation c with 3000 order abrasive paper for metallograph) cut that produces is completely covered;
E) by operation d) sample that processed grinding direction turns clockwise 90 °, carries out polishing with velvet polishing cloth to sample surfaces; Under metaloscope 500 times of enlargement ratios, observe sample surfaces, sample surfaces without obvious cut.
3. the display packing of the rear austenite grain boundary of cutting steel wire high-carbon steel quenching according to claim 1, it is characterized in that: step 4) in, preparation supersaturation picric acid solution takes 5g ~ 7g frohde test solution, is dissolved in 80ml pure water and stirs and get final product.
4. the display packing of the rear austenite grain boundary of cutting steel wire high-carbon steel quenching according to claim 3, is characterized in that: step 4) in, preparation supersaturation picric acid solution also comprises and adds 20ml ~ 25ml alkyl sodium sulfonate.
5. the display packing of the rear austenite grain boundary of cutting steel wire high-carbon steel quenching according to claim 1, is characterized in that: step 5) in, the described etch time is 10min ~ 12min.
6. the display packing of the rear austenite grain boundary of cutting steel wire high-carbon steel quenching according to claim 1, is characterized in that: step 5) in, described supersaturation picric acid solution heating-up temperature is more than or equal to 70 DEG C.
7. the display packing of the rear austenite grain boundary of cutting steel wire high-carbon steel quenching according to claim 1, is characterized in that: step 6) in, the time of described polishing is 3s ~ 5s.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238813A (en) * | 2018-09-19 | 2019-01-18 | 邢台钢铁有限责任公司 | The detection display methods of spring steel austenite grain |
| CN110954382A (en) * | 2019-12-03 | 2020-04-03 | 镇江耐丝新型材料有限公司 | Preparation method of solid-liquid multiphase metallographic sample with superfine steel wire cross section |
| CN111766257A (en) * | 2020-07-08 | 2020-10-13 | 宝钢特钢韶关有限公司 | Steel austenite grain boundary display method and steel austenite grain size evaluation method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005114626A (en) * | 2003-10-09 | 2005-04-28 | Sanyo Special Steel Co Ltd | Corrosive liquid for exposing austenitic grain boundary |
| CN102353566A (en) * | 2011-06-10 | 2012-02-15 | 中国科学院金属研究所 | Method for displaying thermal deformation texture of steel used for nuclear power pressure container |
| CN102590050A (en) * | 2012-01-19 | 2012-07-18 | 东方电气集团东方锅炉股份有限公司 | Method for displaying P91 and P92 steel original austenite grain boundaries |
| CN103175726A (en) * | 2013-03-12 | 2013-06-26 | 上海大学 | Metallographic corrosion method for clearly displaying original austenite grain boundary of NiCrMoV type rotor steel |
| CN103257098A (en) * | 2013-05-16 | 2013-08-21 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel wire rod austenite grain size measurement method |
| CN103628062A (en) * | 2013-08-22 | 2014-03-12 | 中国重汽集团济南动力有限公司 | Metallographic corrosive for showing grain boundaries of steels |
| CN104165828A (en) * | 2014-07-30 | 2014-11-26 | 武汉钢铁(集团)公司 | Wear-resistant 450 steel austenite grain size detection method |
-
2015
- 2015-10-13 CN CN201510673681.2A patent/CN105334087A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005114626A (en) * | 2003-10-09 | 2005-04-28 | Sanyo Special Steel Co Ltd | Corrosive liquid for exposing austenitic grain boundary |
| CN102353566A (en) * | 2011-06-10 | 2012-02-15 | 中国科学院金属研究所 | Method for displaying thermal deformation texture of steel used for nuclear power pressure container |
| CN102590050A (en) * | 2012-01-19 | 2012-07-18 | 东方电气集团东方锅炉股份有限公司 | Method for displaying P91 and P92 steel original austenite grain boundaries |
| CN103175726A (en) * | 2013-03-12 | 2013-06-26 | 上海大学 | Metallographic corrosion method for clearly displaying original austenite grain boundary of NiCrMoV type rotor steel |
| CN103257098A (en) * | 2013-05-16 | 2013-08-21 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel wire rod austenite grain size measurement method |
| CN103628062A (en) * | 2013-08-22 | 2014-03-12 | 中国重汽集团济南动力有限公司 | Metallographic corrosive for showing grain boundaries of steels |
| CN104165828A (en) * | 2014-07-30 | 2014-11-26 | 武汉钢铁(集团)公司 | Wear-resistant 450 steel austenite grain size detection method |
Non-Patent Citations (2)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局: "《中国人民共和国国家标准 GB/T6394-2002》", 31 December 2002 * |
| 俞秋景 等: "高碳钢盘条晶粒度检测方法比较", 《金属热处理》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238813A (en) * | 2018-09-19 | 2019-01-18 | 邢台钢铁有限责任公司 | The detection display methods of spring steel austenite grain |
| CN110954382A (en) * | 2019-12-03 | 2020-04-03 | 镇江耐丝新型材料有限公司 | Preparation method of solid-liquid multiphase metallographic sample with superfine steel wire cross section |
| CN111766257A (en) * | 2020-07-08 | 2020-10-13 | 宝钢特钢韶关有限公司 | Steel austenite grain boundary display method and steel austenite grain size evaluation method |
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