CN106546468A - The aggressive agent shown for middle carbon continuous casting billet containing manganese steel solidified structure and display packing - Google Patents
The aggressive agent shown for middle carbon continuous casting billet containing manganese steel solidified structure and display packing Download PDFInfo
- Publication number
- CN106546468A CN106546468A CN201610914102.3A CN201610914102A CN106546468A CN 106546468 A CN106546468 A CN 106546468A CN 201610914102 A CN201610914102 A CN 201610914102A CN 106546468 A CN106546468 A CN 106546468A
- Authority
- CN
- China
- Prior art keywords
- continuous casting
- manganese steel
- solidified structure
- casting billet
- containing manganese
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The invention discloses a kind of aggressive agent shown for middle carbon continuous casting billet containing manganese steel solidified structure and display packing, its method and step is：（1）Sample of the middle carbon containing manganese steel continuous casting billet is taken, and is polished；（2）By sodium metabisulfite saturated aqueous solution 40～60%, the volume proportion of picric acid saturated alcohols liquid 40～60%, sodium metabisulfite saturated aqueous solution and picric acid saturated alcohols liquid are mixed, is placed 0.5～2 hour；（3）By the inspection placed face down of sample after polishing in aggressive agent, until the solidified structure for checking face shows clearly.In this method, aggressive agent prepares simple, erosion process strong operability；Corrode without the need for hot acid, environmental pollution is little；Erosion effect preferably, after erosion sample through polishing still can pine-tree structure visible in detail, condition is provided with interdendritic composition detection to dendritic arm；After erosion, the solidified structure of sample shows clearly, has better effects under SEM and EPMA, provides advantage with interdendritic composition detection to dendritic arm.
Description
Technical field
Metal structure detection technique field of the present invention, especially one kind are shown for middle carbon continuous casting billet containing manganese steel solidified structure
Aggressive agent and display packing.
Background technology
Solidified structure is divided into macrostructure and microscopic structure, and both forms of expression are different, but its forming process phase closely
Close, and the properties to strand, particularly mechanical performance produce strong impact.Either static ingot or continuous casting billet,
The solidified structure of the two is without essential distinction, but due to the continuous production processes characteristic of continuous casting, the solidified structure of continuous casting billet is present
The characteristics of chill is thin, column crystal is flourishing, Center Equiaxial Crystal is few.
Dual phase steel belongs to middle carbon containing the one kind in manganese steel, and which has low yield tensile ratio, high initial manufacture hardening rate, strong
Degree and ductility it is good fit the features such as, be widely used in the key positions such as automobile buffer beam, rotary shaft, B posts, in recent years, with
The fast development of auto industry, the demand of dual phase steel is also sharply increased therewith.Domestic each big steel enterprise increases double one after another
The R＆D intensity of phase steel, different enterprise's dual phase steel composition designs are variant, but using high [Mn] component system.And for
The higher steel grade of [Mn] content, easily causes continuous casting slab segregation defect, lower procedure thoroughly cannot eliminate, and is genetic to hot rolling material and cold
Banded structure is formed on stocking.Banded structure is a kind of defect(ive) structure, can have a strong impact on steel performance, reduces plasticity, the punching of steel
Toughness, fracture toughness and the contraction percentage of area are hit, Cold Bending Inconfornmy lattice, punching press percent defective height etc. is caused.Currently for dual phase steel banding
The problem of tissue, hot-rolled process thoroughly cannot be eliminated by controlled rolling and controlled cooling, only by the analysis to continuous casting billet solidified structure, really
The reason for determining segregation, targetedly to take measures.At present, conventional erosion means can not still meet dendrite morphology and clearly show
The requirement shown, it is impossible to dendrite interval and microscopic segregation degree that accurately measurement continuous casting billet is organized, for solution segregation and by segregated zone
The problem come, it is impossible to accomplish proposition solution with a definite target in view.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of display and be clearly used for middle carbon continuous casting billet containing manganese steel solidification group
Knit the aggressive agent of display；The display packing that middle carbon continuous casting billet containing manganese steel solidified structure shows.
To solve above-mentioned technical problem, the component volume proportioning taken by the present invention is：Sodium metabisulfite saturation is water-soluble
Liquid 40～60%, picric acid saturated alcohols liquid 60～40%.
Alcohol of the present invention is ethanol and/or methanol.
Sodium metabisulfite saturated aqueous solution of the present invention and picric acid saturated alcohols liquid are placed 0.5～2 hour after mixing.
The inventive method is：（1）Sampling：Sample of the middle carbon containing manganese steel continuous casting billet is taken, and is polished；
（2）Prepare etchant：By sodium metabisulfite saturated aqueous solution 40～60%, the volume of picric acid saturated alcohols liquid 60～40%
Proportioning, sodium metabisulfite saturated aqueous solution and picric acid saturated alcohols liquid is mixed, is placed 0.5～2 hour；
（3）Corrode：By the inspection placed face down of sample after polishing in aggressive agent, until the solidified structure for checking face shows clearly
It is clear.
Step described in the inventive method（1）In, it is polished to roughness Ra≤0.1 μm in inspection face.
Step described in the inventive method（3）In, erosion time is 2～5 minutes.
In described in the inventive method, weight/mass percentage composition of the carbon containing primary alloy constituent in manganese steel is：C 0.08%～
0.25%th, Mn 1.0%～2.0%, S 0～0.020%, P 0～0.020%, Si 0～1.20%, alloy total amount≤5%.
Using the beneficial effect produced by above-mentioned technical proposal it is：Aggressive agent of the present invention prepares simple, erosion process behaviour
The property made is strong；Corrode without the need for hot acid, environmental pollution is little；Erosion effect preferably, after erosion, still clearly can see through polishing by sample
Pine-tree structure is observed, condition is provided with interdendritic composition detection to dendritic arm.
The inventive method adopts picric acid and adds sodium metabisulfite corrodes for dendrite of the middle carbon containing manganese steel, through invading
After erosion, the solidified structure of sample shows clearly, has better effects, to dendritic arm with interdendritic into go-on-go under SEM and EPMA
Survey there is provided advantage.
Description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the sample position structural representation of the present invention；
Fig. 2 is the collected by camera photo in inspection face of the present invention；
Fig. 3 is inspection face optical microscope collection picture of the present invention（50×）Collection photo.
In figure：1- continuous casting billets；2- samples.
Specific embodiment
In this, the characterization processes of the display packing and sample of carbon continuous casting billet containing manganese steel solidified structure adopt following technique
Step：（1）Sample position：As shown in figure 1, a quarter, the center of thickness direction of the sample position for 1 width of continuous casting billet
Place, the direction of arrow in Fig. 1 are cast direction；With the results contrast of cold acid attack low power, it is contemplated that segregated zone centered on the region
With isometry crystalline region.Take the sample 2 of 20mm × 20mm × 25mm；The inspection face of sample 2 is the shade in 20mm × 20mm, i.e. Fig. 1
Part.
（2）Prepare aggressive agent：By sodium metabisulfite（Na2S2O5）Pressed powder and distilled water are made into saturated solution, bitterness
Acid（C6H2OH(NO2)3）Solid particle and alcohol are configured to saturated solution；Described alcohol is methanol and/or ethanol；Under room temperature, take partially
Sodium bisulfite saturated aqueous solution, the supernatant of picric acid saturated alcohols liquid are as the standard solution for configuring aggressive agent, sub- by laying particular stress on
The volume ratio mixing of sulphuric acid saturated aqueous solution of sodium 40～60%, picric acid saturated alcohols liquid 60～40%, shakes up, places at room temperature
0.5～2 hour；Above-mentioned placement process can make Na2S2O5Partial oxidation is into Na2S2O6, erosion effect can be significantly improved.
（3）Sample preparation and erosion：A. according to GB/T 226-91《The macrostructure and defect acid etching method of inspection of steel》Standard is produced
Fritter coarse micro-grain sample；Then it is polished, makes roughness Ra≤0.1 μm in inspection face；Finally with alcohol washes, dry up it is stand-by.
B. the hand-held above-mentioned sample for making, is checked placed face down in aggressive agent, inspection face is fully connect with aggressive agent
Touch, depth of invasion is 2～5mm；During jiggle sample so that reaction product depart from test check face, can at any time from
Observation is taken out in aggressive agent, erosion time checks the solidified structure in face to show clearly after 2～5 minutes；Take out, rushed with dehydrated alcohol
Wash, wipe inspection face, finally dried up with hair-dryer.
C. corrode after inspection face on may attachment reaction generate spot, cannot be wiped out with cotton ball soaked in alcohol, now
Needs are shallow on buffing machine to be polished, to remove the spot.For the inspection face of attachment spot, dendrite interval can be measured,
But which can not be used for detecting micro-area composition, because the result of element meeting Interference Detection micro-area composition contained by attachment.
（4）Measurement：According to the erosion results and experiment purpose in test check face, can be right under 20 times of visual fields of optical microscope
The primary dendritic spacing of sample, secondary dendrite arm spacing are measured；The preferable sample of erosion results can be directly used for micro-area composition
Detection.
Embodiment 1：In this, the display packing of carbon continuous casting billet containing manganese steel solidified structure adopts following processing steps.
In described in the present embodiment, mass component of the carbon containing manganese steel is：C 0.17%、Mn 1.79%、S 0.002%、P
0.016%th, Si 0.36%, Als 0.038%, Cr 0.51%, Nb 0.034%, Ti 0.046%, N 0.0038%, balance of Fe and
Inevitable impurity.
Process conditions：Sodium metabisulfite saturated aqueous solution and picric acid saturated alcohols liquid volume proportion are respectively 50%, in room
Temperature is lower to place 2 hours；Erosion time checks the solidified structure in face to show clearly after 4 minutes；Remaining technique is as described above.
Measurement result：Collected by camera photo under 10 times of visual fields is shown in Fig. 2；Optical microscope collection figure when micro-area composition is detected
Piece（50×）See Fig. 3；By shown in Fig. 2, Fig. 3, the solidified structure of erosion shows clearly, under optical microscope and ultramicroscope
Accurately can be measured.
Embodiment 2：In this, the display packing of carbon continuous casting billet containing manganese steel solidified structure adopts following processing steps.
In described in the present embodiment, mass component of the carbon containing manganese steel is：C 0.16%、Mn 1.81%、S 0.001%、P
0.017%th, Si 0.37%, Als 0.042%, Cr 0.50%, Nb 0.036%, Ti 0.049%, N 0.0029%, balance of Fe and
Inevitable impurity.
Process conditions：By sodium metabisulfite saturated aqueous solution 40%, the volume proportion of picric acid saturated alcohols liquid 60%, in room
Temperature is lower to place 1 hour；Erosion time checks the solidified structure in face to show clearly after 2 minutes；Remaining technique is as described above.
Measurement result：The solidified structure of erosion shows clearly, and standard can be carried out under optical microscope and ultramicroscope
True measurement.
Embodiment 3：In this, the display packing of carbon continuous casting billet containing manganese steel solidified structure adopts following processing steps.
In described in the present embodiment, mass component of the carbon containing manganese steel is：C 0.09%、Mn 1.99%、S 0.001%、P
0.015%th, Si 1.16%, Als 0.043%, Cr 0.033%, Ti 0.014%, N 0.0038%, balance of Fe and inevitably
Impurity.
Process conditions：By sodium metabisulfite saturated aqueous solution 60%, the volume proportion of picric acid saturated alcohols liquid 40%, in room
Temperature decentralization sets to 0 .5 hours；Erosion time checks the solidified structure in face to show clearly after 5 minutes；Remaining technique is as described above.
Measurement result：The solidified structure of erosion shows clearly, and standard can be carried out under optical microscope and ultramicroscope
True measurement.
Claims (7)
1. a kind of aggressive agent shown for middle carbon continuous casting billet containing manganese steel solidified structure, it is characterised in that its component volume proportioning
For：Sodium metabisulfite saturated aqueous solution 40～60%, picric acid saturated alcohols liquid 60～40%.
2. the aggressive agent shown for middle carbon continuous casting billet containing manganese steel solidified structure according to claim 1, it is characterised in that：
The alcohol is ethanol and/or methanol.
3. the aggressive agent shown for middle carbon continuous casting billet containing manganese steel solidified structure according to claim 1 and 2, its feature exist
In：The sodium metabisulfite saturated aqueous solution and picric acid saturated alcohols liquid are placed 0.5～2 hour after mixing.
4. a kind of display packing of middle carbon continuous casting billet containing manganese steel solidified structure, it is characterised in that：（1）Sampling：Middle carbon is taken containing manganese steel
The sample of continuous casting billet, and be polished；
（2）Prepare etchant：By sodium metabisulfite saturated aqueous solution 40～60%, the volume of picric acid saturated alcohols liquid 60～40%
Proportioning, sodium metabisulfite saturated aqueous solution and picric acid saturated alcohols liquid is mixed, is placed 0.5～2 hour；
（3）Corrode：By the inspection placed face down of sample after polishing in aggressive agent, until the solidified structure for checking face shows clearly
It is clear.
5. the display packing for middle carbon continuous casting billet containing manganese steel solidified structure according to claim 4, it is characterised in that：Institute
State step（1）In, it is polished to roughness Ra≤0.1 μm in inspection face.
6. the display packing for middle carbon continuous casting billet containing manganese steel solidified structure according to claim 4, it is characterised in that：Institute
State step（3）In, erosion time is 2～5 minutes.
7. the display packing for middle carbon continuous casting billet containing manganese steel solidified structure according to claim 4,5 or 6, its feature exist
In weight/mass percentage composition of the middle carbon containing primary alloy constituent in manganese steel is：C 0.08%～0.25%, Mn 1.0%～2.0%,
S 0～0.020%, P 0～0.020%, Si 0～1.20%, alloy total amount≤5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914102.3A CN106546468A (en) | 2016-10-20 | 2016-10-20 | The aggressive agent shown for middle carbon continuous casting billet containing manganese steel solidified structure and display packing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914102.3A CN106546468A (en) | 2016-10-20 | 2016-10-20 | The aggressive agent shown for middle carbon continuous casting billet containing manganese steel solidified structure and display packing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106546468A true CN106546468A (en) | 2017-03-29 |
Family
ID=58391938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610914102.3A Pending CN106546468A (en) | 2016-10-20 | 2016-10-20 | The aggressive agent shown for middle carbon continuous casting billet containing manganese steel solidified structure and display packing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106546468A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382494A (en) * | 2008-08-26 | 2009-03-11 | 武汉钢铁(集团)公司 | Method for displaying and quantitatively determining retained austenite or island martensite- austenite in TRIP steel |
| CN102011119A (en) * | 2010-09-17 | 2011-04-13 | 马鞍山钢铁股份有限公司 | Dual-phase steel color metallographic coloring agent and color display method thereof |
| CN102175191A (en) * | 2011-02-25 | 2011-09-07 | 首钢总公司 | Quantitative method for area percent of martensite-austenite (MA) island structure |
| CN105445309A (en) * | 2014-08-28 | 2016-03-30 | 宝山钢铁股份有限公司 | Method for quantitatively analyzing content of martensite in dual phase steel |
-
2016
- 2016-10-20 CN CN201610914102.3A patent/CN106546468A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382494A (en) * | 2008-08-26 | 2009-03-11 | 武汉钢铁(集团)公司 | Method for displaying and quantitatively determining retained austenite or island martensite- austenite in TRIP steel |
| CN102011119A (en) * | 2010-09-17 | 2011-04-13 | 马鞍山钢铁股份有限公司 | Dual-phase steel color metallographic coloring agent and color display method thereof |
| CN102175191A (en) * | 2011-02-25 | 2011-09-07 | 首钢总公司 | Quantitative method for area percent of martensite-austenite (MA) island structure |
| CN105445309A (en) * | 2014-08-28 | 2016-03-30 | 宝山钢铁股份有限公司 | Method for quantitatively analyzing content of martensite in dual phase steel |
Non-Patent Citations (3)
| Title |
|---|
| 刘自权: "车轮用热轧高强钢轧制工艺及疲劳性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 邹宏辉 等: "Si-Mn系TRIP钢显微组织研究", 《机械工程材料》 * |
| 郭海霞 等: "铁素体奥氏体型双相不锈钢的侵蚀方法", 《理化检验-物理分册》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wu et al. | Influence of texture and grain size on the room-temperature ductility and tensile behavior in a Mg–Gd–Zn alloy processed by rolling and forging | |
| Yoshida et al. | Influence of phosphorus on solidification structure in continuously cast 0.1 mass% carbon steel | |
| Saad et al. | Deformation characteristics of Al-4043 alloy | |
| Cao et al. | Effects of high-density pulse current on mechanical properties and microstructure in a rolled Mg–9.3 Li–1.79 Al–1.61 Zn alloy | |
| JP5515732B2 (en) | Method for producing hot-rolled steel sheet without edge cracks and method for producing cold-rolled steel sheet without edge cracks | |
| Cho et al. | Effect of thermal cycle and nitrogen content on the hot ductility of boron-bearing steel | |
| CN101880881A (en) | High aluminum zinc alloy etching agent and use method thereof | |
| CN103592170B (en) | The autstenitic grain size of steel and dendritic segregation detect etching solution and detection method | |
| CN104946942B (en) | Aluminum alloy for liquid-state die forging forming | |
| CN101623700B (en) | Method for producing medium-carbon steel hot-rolled steel sheet | |
| CN108359836A (en) | A kind of preparation method of the Cu-Cr-Zr alloy thin bands based on Sub realizable fuzzy matrix | |
| CN100432259C (en) | Die cast magnesium alloy with high fluidity and preparation method thereof | |
| CN102854211B (en) | Method for measuring dissolving temperature of Nb (C,N) in low-carbon micro-alloyed steel by internal friction method | |
| CN106546596B (en) | A kind of method of inspection of determining continuous casting steel billet subsurface inclusion defective locations | |
| Tiryakioğlu et al. | The effect of structural integrity on the tensile deformation characteristics of A206-T71 alloy castings | |
| CN104316369A (en) | Method for display dentrite morphology of gear steel continuous-casting billet | |
| Zhang et al. | Enhanced strength of WE43 magnesium-rare earth alloy via combining extrusion and aging | |
| CN106546468A (en) | The aggressive agent shown for middle carbon continuous casting billet containing manganese steel solidified structure and display packing | |
| Hao et al. | Solidification structures of Fe–Cr–Ni–Mo–N super-austenitic stainless steel processed by twin-roll strip casting and ingot casting and their segregation evolution behaviors | |
| Zhang et al. | Mechanical properties of thixomolded AZ91D magnesium alloy | |
| Son et al. | Differential speed rolling of twin-roll-cast 6xxx al alloy strips and its influence on the sheet formability | |
| CN106756528A (en) | A kind of nitrogen medium managese steel strip high and its near-net forming preparation method | |
| Grajcar | Morphological features of retained austenite in thermo-mechanically processed C-Mn-Si-Al-Nb-Ti multiphase steel | |
| CN107598108A (en) | A kind of method for judging continuous casting billet and transverse corner crack line place process occurring | |
| Li et al. | Study on the corrosion residual strength of the 1.0 wt.% Ce modified AZ91 magnesium alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170329 |
|
| RJ01 | Rejection of invention patent application after publication |