CN105158046A - Rapid preparation method of continuous casting billet macro-sample - Google Patents
Rapid preparation method of continuous casting billet macro-sample Download PDFInfo
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- CN105158046A CN105158046A CN201510371487.9A CN201510371487A CN105158046A CN 105158046 A CN105158046 A CN 105158046A CN 201510371487 A CN201510371487 A CN 201510371487A CN 105158046 A CN105158046 A CN 105158046A
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Abstract
The invention relates to a rapid preparation method of a continuous casting billet macro-sample. The method is characterized by including the steps of: 1) taking a small square billet sample; 2) adjusting milling machine spindle and feed rotation rate; 3) processing a sample by the milling machine to roughness and surface temperature meeting the requirements; 4) rapidly conducting hot delivery of the sample to a pickling tank manually; 5) placing the sample into the pickling tank; 6) spraying cold acid on a sample surface evenly to perform acid etching; 7) carrying out hot water flushing and fan drying; and 8) conducting structure measurement and defect rating according to YB/T4002-2013, i.e. a continuous casting billet macrostructure defect rating figure. The technical scheme makes full use of the test surface temperature of the processing process, has no need for acid heating, reduces the treatment time, simplifies the operation process, reduces acid loss, simultaneously prevents insufficient display of macro-quality like crack, shrinkage, porosity and other defects, and ensures accurate determination of the proportion of isometric crystal, dendritic crystal and billet shell compact isometric crystal.
Description
Technical field
The present invention relates to a kind of preparation method of coarse micro-grain sample, be specifically related to a kind of fast preparation method of continuous casting billet low power sample, belong to continuous casting sample detection technique field.
Background technology
The detection of continuous casting billet coarse micro-grain sample is a kind of directly effective continuous casting billet internal soundness detection method, and its assay is directly connected to the adjustment of conticaster cooling and stirring system.The evaluation of macrostructure is general according to GB or industry standard, and specific targets have: center porosity, shrinkage cavity, underbead crack, rimhole, non-metallic inclusion, white band, slag inclusion etc.The macroscopic examination be widely used at present generally adopts cold erosion inspection, sulfur print test, dendrite inspection and hot acid erosion inspection four kinds of methods.Cold erosion inspection generally refers to and sample one integral piece is directly less than 0.8 μm by milling machine milling to surfaceness, then uses pickling solution brushing surface, then cleans with cleaning fluid or hot water.The pickling solution of cold erosion method of inspection directly affects the effect of acid etching, proportioning composition for different steel grade pickling solutions is also not quite similar, according to the cold etching liquid recommended in GB/T226, the effect of acid etching is unsatisfactory, and the mild degree of cold erosion method of inspection corrosion, strict to acid corrosion process operation requirements, as pickling solution smears the illusion that uneven meeting causes component segregation, as insufficient in scrubbed, the defects such as small pore then can not fully show, and cause lowly sentence or fail to judge.For sulfur print test, it is little to there is pollution in this method, cycle is short, advantage simple to operate, but shortcoming is from the pattern of inspection, can not show the ratio of the fine and close equiax crystal of equiax crystal, dendrite and base shell, and be only confined to the slab quality inspection of ω s > 0.015%, when in strand, s content is lower, sufur printing sheet is smudgy, even occurs " blank ".Dendrite corrosion check is that flat for the milling of sample milling machine, grinding machine polishing (surfaceness≤0.63 μm), buffing machine polishing (surfaceness≤0.1 μm) are reached mirror finish, uses specific corrosion reagent to carry out watering erosion at ambient temperature, wipes erosion or immersion test check face is about 12min.Though this technique can judge the indices of Inner Quality of Billet, the ratio of the fine and close equiax crystal of Accurate Determining equiax crystal, dendrite and base shell, but shortcoming is sample processing smoothness requirements high, process takes time and effort, and the cycle is oversize.For hot acid erosion inspection, the technique of usual employing is for be machined to suitable dimension by sample, be machined to surfaceness through milling machine and be not more than 1.6 μm, then test put into and be heated to 60 ~ 80 DEG C of hydrochloric acid and sulfuric acid mixed solution acid etching 15 ~ 25min in advance, reusable heat water cleans.The method advantage is that the smoothness requirements that sample is processed is not high, can fully show respective defect, but shortcoming is to heat acid, and the cycle is longer, and operating procedure is more complicated, and sample monoblock is soaked, and the loss of acid is large, heavy contamination.Therefore, for problems of the prior art, a kind of new technical scheme of exigence solves above-mentioned technical matters.
Summary of the invention
The present invention is just for the technical matters existed in prior art, a kind of fast preparation method of continuous casting billet low power sample is provided, fast processing is carried out to the low power sample of continuous casting billet, make full use of the testing surface temperature of process, without the need to carrying out acid heating, reduce the time of process, simplify the operation technique, the loss reducing acid prevents low multiple quality such as crackle, shrinkage cavity, the defect such as loose from failing fully display simultaneously, and guarantees the ratio of the fine and close equiax crystal of Accurate Determining equiax crystal, dendrite and base shell.
In order to solve above-mentioned Problems existing, technical scheme disclosed by the invention is as follows: a kind of fast preparation method of continuous casting billet low power sample said method comprising the steps of; 1) get small billet sample, section is 90 × 90mm-200 × 200mm; 2) milling machine spindle and feeding rotating speed is adjusted; 3) with milling machine sample is machined to roughness and surface temperature meets the demands; 4) manually quick sample heat is delivered to descaling bath; 5) sample is put into descaling bath; 6) be evenly sprinkled upon specimen surface with cold acid and carry out acid etching; 7) hot water injection, blower fan dry up; 8) according to YB/T4002-2013 and continuous casting steel billet macrostructure defect judge picture, tissue measurement, defect grading are carried out to sample.
As a modification of the present invention, specific as follows in described step 1), get the small billet sample that one piece of 5cm is thick, two ends are gas flame cuttiug face.
As a modification of the present invention, described step 2) in specific as follows, small billet sample is positioned on vertical milling machine, the speed of mainshaft is adjusted to 375r/min, feeding rotating speed is adjusted to 190r/min, reprocessabilty twice, to ensure a few temperature requirement of the roughness of specimen surface.
As a modification of the present invention, specific as follows in described step 3), testing surface is machined to surfaceness and is not more than 1.6 μm, and ensure that the surface temperature of sample is greater than 250 DEG C.
As a modification of the present invention, specific as follows in described step 5), fast sample is positioned in descaling bath,
As a modification of the present invention, specific as follows in described step 6), the technical hydrochloric acid of 100ml concentration 30% is got with beaker, the machined surface being sprinkled upon sample uniformly corrodes. to utilize the temperature of sample itself that the acid solution of specimen surface is heated to more than 80 DEG C, thus comparatively clearly show the texture distribution of sample and the pattern of macro defect.
As a modification of the present invention, specific as follows in described step 7), with hot water injection after 2-3min, then dry up fast with blower fan, can clearly show various defect and tissue distribution patterns.
Relative to prior art, advantage of the present invention is as follows: 1) the low power sample of the present invention to continuous casting billet carries out fast processing, make full use of the testing surface temperature of process, without the need to carrying out acid heating, reduce the time of process, simplify the operation technique, and the loss reducing acid prevents low multiple quality such as crackle, shrinkage cavity, the defect such as loose from failing fully display simultaneously, and guarantee the ratio of the fine and close equiax crystal of Accurate Determining equiax crystal, dendrite and base shell; 2) after the method process, can reach to lose with hot acid and check same low power effect, the time of inspection 1 piece of sample is about 3min, compared with being about the 40min time with existing hot aciding, processing time significantly reduces, and the online quick test for short run is very effective; 3) whole technical scheme is simple to operate, and the cycle is short, reduces the loss of acid, has saved cost, reduced pollution.
Accompanying drawing explanation
Fig. 1 is preparation flow figure of the present invention.
Embodiment
In order to deepen, to understanding of the present invention and understanding, below in conjunction with the drawings and specific embodiments, to illustrate the present invention further.
embodiment 1:
See Fig. 1, a kind of fast preparation method of continuous casting billet low power sample, said method comprising the steps of; 1) get the small billet sample that 5cm is thick, section is 90 × 90mm-200 × 200mm, and two ends are gas flame cuttiug face; 2) milling machine spindle and feeding rotating speed is adjusted; Be positioned on vertical milling machine by small billet sample, the speed of mainshaft is adjusted to 375r/min, feeding rotating speed is adjusted to 190r/min, reprocessabilty twice, to ensure a few temperature requirement of the roughness of specimen surface; 3) with milling machine sample is machined to roughness and surface temperature meets the demands, testing surface is machined to surfaceness and is not more than 1.6 μm, and ensure that the surface temperature of sample is greater than 250 DEG C; 4) manually quick sample heat is delivered to descaling bath; 5) sample is put into descaling bath; 6) be evenly sprinkled upon specimen surface with cold acid and carry out acid etching, the technical hydrochloric acid of 100ml concentration 30% is got with beaker, the machined surface being sprinkled upon sample uniformly corrodes. to utilize the temperature of sample itself, the acid solution of specimen surface is heated to more than 80 DEG C, thus comparatively clearly show the texture distribution of sample and the pattern of macro defect, 7) hot water injection is used after about 2-3min, then dry up fast with blower fan, can clearly show various defect and tissue distribution patterns; 8) according to YB/T4002-2013 and continuous casting steel billet macrostructure defect judge picture, tissue measurement, defect grading are carried out to sample.This technical scheme makes full use of the testing surface temperature of process, without the need to carrying out acid heating, reduce the time of process, simplify the operation technique, the loss reducing acid prevents low multiple quality as crackle simultaneously, shrinkage cavity, the defect such as loose fails fully display, and guarantee Accurate Determining equiax crystal, the ratio of dendrite and the fine and close equiax crystal of base shell, after the method process, can reach to lose with hot acid and check same low power effect, the time of inspection 1 piece of sample is about 3min, compared with being about the 40min time with existing hot aciding, processing time significantly reduces, online quick test for short run is very effective, whole technical scheme is simple to operate, and the cycle is short, reduces the loss of acid, has saved cost, reduced pollution.
It should be noted that, above-described embodiment is only preferred embodiment of the present invention, be not used for limit protection scope of the present invention, the equivalent replacement that the basis of technique scheme is made or substitute, all belong to protection scope of the present invention.
Claims (8)
1. a fast preparation method for continuous casting billet low power sample, is characterized in that, said method comprising the steps of; 1) small billet sample is got; 2) milling machine spindle and feeding rotating speed is adjusted; 3) with milling machine sample is machined to roughness and surface temperature meets the demands; 4) manually quick sample heat is delivered to descaling bath; 5) sample is put into descaling bath; 6) be evenly sprinkled upon specimen surface with cold acid and carry out acid etching; 7) hot water injection, blower fan dry up; 8) according to YB/T4002-2013 and continuous casting steel billet macrostructure defect judge picture, tissue measurement, defect grading are carried out to sample.
2. the fast preparation method of continuous casting billet low power sample according to claim 1, is characterized in that, specific as follows in described step 1), and get the small billet sample that one piece of 5cm is thick, two ends are gas flame cuttiug face.
3. the fast preparation method of continuous casting billet low power sample according to claim 1, it is characterized in that, described step 2) in specific as follows, small billet sample is positioned on vertical milling machine, the speed of mainshaft is adjusted to 375r/min, feeding rotating speed is adjusted to 190r/min, reprocessabilty twice, to ensure a few temperature requirement of the roughness of specimen surface.
4. the fast preparation method of continuous casting billet low power sample according to claim 1, is characterized in that, specific as follows in described step 3), testing surface is machined to surfaceness and is not more than 1.6 μm, and ensures that the surface temperature of sample is greater than 250 DEG C.
5. the fast preparation method of continuous casting billet low power sample according to claim 1, is characterized in that, specific as follows in described step 5), is positioned in descaling bath by sample fast.
6. the fast preparation method of continuous casting billet low power sample according to claim 1, it is characterized in that, specific as follows in described step 6), the technical hydrochloric acid of 100ml concentration 30% is got with beaker, the machined surface being sprinkled upon sample uniformly corrodes, to utilize the temperature of sample itself that the acid solution of specimen surface is heated to more than 80 DEG C, thus comparatively clearly show the texture distribution of sample and the pattern of macro defect.
7. the fast preparation method of continuous casting billet low power sample according to claim 1, is characterized in that, specific as follows in described step 7), with hot water injection after 2-3min, then dries up fast with blower fan, can clearly show various defect and tissue distribution patterns.
8. the fast preparation method of continuous casting billet low power sample according to claim 1, is characterized in that, the small billet sample section in described step 1) is 90 × 90mm-200 × 200mm.
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Cited By (9)
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| CN105716929A (en) * | 2016-03-04 | 2016-06-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Quantitative assessment method for continuous casting central pipe |
| CN107314910A (en) * | 2017-06-15 | 2017-11-03 | 马鞍山钢铁股份有限公司 | A kind of method that micro-alloyed high strength automobile steel strand low power produces sample |
| CN108007855A (en) * | 2017-11-27 | 2018-05-08 | 鑫鹏源智能装备集团有限公司 | A kind of low power experimental method of continuous casting billet high-efficiency environment friendly |
| CN108226174A (en) * | 2018-03-09 | 2018-06-29 | 湖南工业大学 | Continuous casting steel billet tissue defects automatic measure grading system |
| CN109425319A (en) * | 2017-08-25 | 2019-03-05 | 宝山钢铁股份有限公司 | A method of detection acid cleaning process is to lateral section influence degree |
| CN110749467A (en) * | 2019-10-30 | 2020-02-04 | 马鞍山钢铁股份有限公司 | Low-power inspection method for high-manganese and high-titanium microalloyed steel casting blank |
| CN111899230A (en) * | 2020-07-15 | 2020-11-06 | 重庆大学 | Quality quantification and automatic multi-stage judgment method based on three-dimensional characteristics of steel casting billet macrostructure |
| CN112362438A (en) * | 2020-11-17 | 2021-02-12 | 陕西龙门钢铁有限责任公司 | Application method of cold corrosion display reagent for macrostructure and defects of continuous casting steel billet |
| CN114486708A (en) * | 2022-03-15 | 2022-05-13 | 山东省机械设计研究院 | Environment-friendly acid corrosion method test device |
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| CN105716929A (en) * | 2016-03-04 | 2016-06-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Quantitative assessment method for continuous casting central pipe |
| CN107314910A (en) * | 2017-06-15 | 2017-11-03 | 马鞍山钢铁股份有限公司 | A kind of method that micro-alloyed high strength automobile steel strand low power produces sample |
| CN109425319A (en) * | 2017-08-25 | 2019-03-05 | 宝山钢铁股份有限公司 | A method of detection acid cleaning process is to lateral section influence degree |
| CN108007855A (en) * | 2017-11-27 | 2018-05-08 | 鑫鹏源智能装备集团有限公司 | A kind of low power experimental method of continuous casting billet high-efficiency environment friendly |
| CN108226174A (en) * | 2018-03-09 | 2018-06-29 | 湖南工业大学 | Continuous casting steel billet tissue defects automatic measure grading system |
| CN110749467A (en) * | 2019-10-30 | 2020-02-04 | 马鞍山钢铁股份有限公司 | Low-power inspection method for high-manganese and high-titanium microalloyed steel casting blank |
| CN111899230A (en) * | 2020-07-15 | 2020-11-06 | 重庆大学 | Quality quantification and automatic multi-stage judgment method based on three-dimensional characteristics of steel casting billet macrostructure |
| CN111899230B (en) * | 2020-07-15 | 2023-11-17 | 重庆大学 | Quality quantification and automatic multi-stage judgment method based on three-dimensional characteristics of steel casting blank macrostructure |
| CN112362438A (en) * | 2020-11-17 | 2021-02-12 | 陕西龙门钢铁有限责任公司 | Application method of cold corrosion display reagent for macrostructure and defects of continuous casting steel billet |
| CN114486708A (en) * | 2022-03-15 | 2022-05-13 | 山东省机械设计研究院 | Environment-friendly acid corrosion method test device |
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Effective date of registration: 20190703 Address after: 215600 Yonglian Village, Nanfeng Town, Zhangjiagang City, Jiangsu Province Patentee after: Lian Feng Steel (Zhangjiagang) Co., Ltd. Address before: 215600 Zhangjiagang Lianfeng Energy Equipment Co., Ltd. of Yonglian Village, Nanfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: Jiangsu Lianfeng Energy Equipment Co., Ltd. |