KR100797281B1 - 초음파법에 의한 탄소강 페라이트 결정립 크기의 비파괴적측정방법 - Google Patents
초음파법에 의한 탄소강 페라이트 결정립 크기의 비파괴적측정방법 Download PDFInfo
- Publication number
- KR100797281B1 KR100797281B1 KR1019990064139A KR19990064139A KR100797281B1 KR 100797281 B1 KR100797281 B1 KR 100797281B1 KR 1019990064139 A KR1019990064139 A KR 1019990064139A KR 19990064139 A KR19990064139 A KR 19990064139A KR 100797281 B1 KR100797281 B1 KR 100797281B1
- Authority
- KR
- South Korea
- Prior art keywords
- grain size
- ferrite
- ultrasonic
- carbon steel
- attenuation coefficient
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4472—Mathematical theories or simulation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Algebra (AREA)
- Acoustics & Sound (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
화학성분(wt%) | |||||||||
C | Mn | Si | P | S | Ti | Nb | sol. Al | N2 | |
강종D | 0.16 | 1.11 | 0.26 | 0.019 | 0.004 | 0.011 | - | 0.030 | 0.0035 |
강종N | 0.16 | 1.10 | 0.26 | 0.019 | 0.004 | 0.012 | 0.010 | 0.028 | 0.0029 |
강종E | 0.10 | 1.40 | 0.22 | 0.015 | 0.006 | 0.011 | - | 0.042 | 0.0025 |
순번 | 강종 | 화학조성(wt%) | |||||||||
C | Mn | Si | Cr | Mo | Ni | Nb | Cu | Ti | V | ||
1 | SS400 | 0.126 | 0.70 | 0.24 | 0.024 | 0.009 | 0.020 | - | 0.016 | ||
2 | SS400 | 0.162 | 0.54 | 0.27 | 0.026 | 0.007 | 0.025 | - | 0.016 | ||
3 | SS400 | 0.150 | 0.81 | 0.25 | 0.021 | 0.011 | 0.019 | - | 0.020 | ||
4 | SS400 | 0.199 | 0.68 | 0.23 | 0.012 | 0.007 | 0.013 | - | 0.019 | ||
5 | SS400 | 0.193 | 0.85 | 0.26 | 0.025 | 0.013 | 0.025 | - | 0.037 | - | |
6 | SS490 | 0.181 | 1.45 | 0.27 | 0.021 | 0.018 | 0.018 | 0.017 | 0.020 | 0.001 | |
7 | SM41B | 0.146 | 1.05 | 0.26 | 0.037 | 0.014 | 0.020 | - | 0.019 | 0.015 | |
8 | SM41B | 0.204 | 1.13 | 0.26 | 0.026 | 0.015 | 0.031 | 0.026 | 0.004 | 0.005 | |
9 | SM50B | 0.130 | 1.42 | 0.40 | 0.021 | 0.020 | 0.041 | 0.006 | 0.028 | 0.001 | |
10 | SM50B | 0.135 | 1.32 | 0.39 | 0.015 | 0.016 | 0.018 | 0.021 | 0.009 | 0.001 | - |
11 | API X65 | 0.104 | 1.58 | 0.28 | 0.042 | 0.017 | 0.029 | 0.041 | 0.032 | 0.001 | 0.056 |
12 | NVA | 0.156 | 1.50 | 0.41 | 0.021 | 0.020 | 0.031 | - | 0.021 | 0.013 | 0.005 |
13 | NVA | 0.162 | 0.57 | 0.25 | 0.016 | 0.008 | 0.018 | 0.014 | 0.002 | - | |
14 | NVA | 0.127 | 0.63 | 0.24 | 0.015 | 0.009 | 0.030 | - | 0.022 | - | |
15 | NVA | 0.184 | 0.70 | 0.24 | 0.017 | 0.010 | 0.031 | - | 0.021 | - | |
16 | LRA | 0.166 | 1.49 | 0.40 | 0.020 | 0.021 | 0.031 | 0.019 | - | ||
17 | LRA | 0.152 | 1.52 | 0.40 | 0.017 | 0.019 | 0.030 | - | 0.011 | 0.002 | |
18 | LRA | 0.117 | 0.64 | 0.25 | 0.013 | 0.010 | 0.023 | 0.022 | - | - | |
19 | LRA | 0.140 | 1.01 | 0.25 | 0.018 | 0.013 | 0.024 | - | 0.039 | 0.001 | - |
20 | AH32 | 0.115 | 1.37 | 0.28 | 0.027 | 0.015 | 0.037 | - | 0.028 | 0.013 | - |
21 | SM490 | 0.166 | 0.29 | 0.31 | 0.023 | 0.016 | 0.021 | 0.005 | 0.046 | 0.001 | 0.005 |
22 | API X65 | 0.080 | 1.40 | 0.22 | 0.031 | 0.018 | 0.028 | 0.042 | 0.021 | 0.010 | 0.005 |
23 | S45C | 0.485 | 0.69 | 0.24 | 0.020 | 0.007 | 0.012 | 0.005 | 0.007 | 0.001 | 0.005 |
24 | S45C | 0.472 | 0.67 | 0.23 | 0.020 | 0.007 | 0.016 | 0.005 | 0.007 | 0.001 | 0.005 |
25 | S45C | 0.474 | 0.70 | 0.24 | 0.020 | 0.008 | 0.015 | 0.005 | 0.007 | 0.002 | 0.050 |
26 | EH32 | 0.147 | 1.45 | 0.38 | 0.020 | 0.018 | 0.021 | 0.005 | 0.020 | 0.001 | 0.048 |
27 | AH32 | 0.112 | 0.90 | 0.26 | 0.022 | 0.011 | 0.022 | 0.005 | 0.019 | 0.001 | 0.005 |
28 | S45C | 0.500 | 0.81 | 0.24 | 0.022 | 0.009 | 0.016 | 0.005 | 0.012 | 0.002 | 0.005 |
순번 | 감쇠계수 (Nepers/cm) | Dav(μm) | 상분율(%)_ | |
Ferrite | Pearlite | |||
1 | 0.0644 | 7.93 | 88.9 | 11.1 |
2 | 0.0699 | 8.80 | 86.4 | 13.6 |
3 | 0.1105 | 10.46 | 85.1 | 14.9 |
4 | 0.3010 | 15.32 | 83.0 | 17.0 |
5 | 0.2456 | 13.81 | 82.1 | 17.0 |
6 | 0.1201 | 10.83 | 77.6 | 22.4 |
7 | 0.2296 | 13.81 | 84.6 | 15.4 |
8 | 0.2853 | 14.80 | 68.8 | 31.2 |
9 | 0.1445 | 11.21 | 75.5 | 24.5 |
10 | 0.1030 | 10.10 | 81.5 | 18.5 |
11 | 0.1000 | 3.83 | 87.9 | 12.1 |
12 | 0.0981 | 9.43 | 78.1 | 21.9 |
13 | 0.2194 | 13.34 | 86.1 | 13.9 |
14 | 0.1299 | 11.21 | 90.2 | 9.8 |
15 | 0.5095 | 18.86 | 82.8 | 17.2 |
16 | 0.2719 | 14.29 | 74.9 | 25.1 |
17 | 0.1250 | 11.21 | 78.0 | 22.0 |
18 | 0.1980 | 12.88 | 89.8 | 10.2 |
19 | 0.3927 | 17.00 | 86.0 | 14.0 |
20 | 0.0265 | 6.22 | 91.8 | 8.2 |
21 | 0.1001 | 10.10 | 80.2 | 19.8 |
22 | 0.0403 | 6.90 | 92.8 | 7.2 |
23 | 0.3520 | 15.86 | 26.6 | 73.4 |
24 | 0.2331 | 13.34 | 30.0 | 70.0 |
25 | 0.0510 | 7.66 | 33.8 | 66.2 |
26 | 0.0560 | 7.93 | 87.7 | 12.3 |
27 | 0.0490 | 7.93 | 94.7 | 5.3 |
28 | 0.1205 | 10.46 | 29.7 | 70.3 |
Claims (2)
- 페라이트 + 퍼얼라이트의 2상 혼합조직을 갖는 탄소강의 감쇠계수(α)를 초음파 탐촉자를 사용하여 측정한 후, 측정된 α를 하기 [수학식 1]에 대입하여 페라이트 결정립 크기를 계산하여 얻는 것을 특징으로 하는 초음파법에 의한 탄소강 페라이트 결정립 크기의 비파괴적 측정방법[수학식 1]Dav = 1.79 + 22.97×α1/b(b: 2.02-2.04, R2: 96.31%, σ(standard deviation): 0.95, 감쇠계수 α의 단위는 Nepers/cm이고, 페라이트 결정립의 단위는 ㎛임)
- 제 1 항에 있어서,상기 b는 2.03인 것임을 특징으로 하는 초음파법에 의한 탄소강 페라이트 결정립 크기의 비파괴적 측정방법
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019990064139A KR100797281B1 (ko) | 1999-12-28 | 1999-12-28 | 초음파법에 의한 탄소강 페라이트 결정립 크기의 비파괴적측정방법 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019990064139A KR100797281B1 (ko) | 1999-12-28 | 1999-12-28 | 초음파법에 의한 탄소강 페라이트 결정립 크기의 비파괴적측정방법 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20010061641A KR20010061641A (ko) | 2001-07-07 |
KR100797281B1 true KR100797281B1 (ko) | 2008-01-23 |
Family
ID=19631455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019990064139A KR100797281B1 (ko) | 1999-12-28 | 1999-12-28 | 초음파법에 의한 탄소강 페라이트 결정립 크기의 비파괴적측정방법 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100797281B1 (ko) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101008028B1 (ko) * | 2004-03-11 | 2011-01-13 | 니뽄스틸코포레이션 | 결정입경분포 측정방법 및 장치 |
KR101635811B1 (ko) * | 2014-08-14 | 2016-07-05 | 주식회사 포스코 | 주편 품질 모니터링장치 및 주편 품질 평가방법 |
CN104749251B (zh) * | 2015-04-09 | 2017-09-05 | 中南大学 | 一种剔除水声距影响的晶粒尺寸超声评价方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06258299A (ja) * | 1993-03-04 | 1994-09-16 | Kawasaki Steel Corp | 結晶粒度測定方法 |
JPH0735734A (ja) * | 1993-07-23 | 1995-02-07 | Sumitomo Metal Ind Ltd | 超音波測定方法 |
JPH0843363A (ja) * | 1994-08-03 | 1996-02-16 | Kawasaki Steel Corp | 超音波による結晶粒径測定方法およびその装置 |
-
1999
- 1999-12-28 KR KR1019990064139A patent/KR100797281B1/ko active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06258299A (ja) * | 1993-03-04 | 1994-09-16 | Kawasaki Steel Corp | 結晶粒度測定方法 |
JPH0735734A (ja) * | 1993-07-23 | 1995-02-07 | Sumitomo Metal Ind Ltd | 超音波測定方法 |
JPH0843363A (ja) * | 1994-08-03 | 1996-02-16 | Kawasaki Steel Corp | 超音波による結晶粒径測定方法およびその装置 |
Also Published As
Publication number | Publication date |
---|---|
KR20010061641A (ko) | 2001-07-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Toozandehjani et al. | On the correlation between microstructural evolution and ultrasonic properties: a review | |
Vijayalakshmi et al. | Influence of heat treatment on the microstructure, ultrasonic attenuation and hardness of SAF 2205 duplex stainless steel | |
Klinman et al. | Ultrasonic prediction of grain size, strength, and toughness in plain carbon steel | |
GB2144551A (en) | Method of determining grain size | |
Palanichamy et al. | Ultrasonic velocity measurements for characterizing the annealing behaviour of cold worked austenitic stainless steel | |
EP3656886A1 (en) | Steel plate | |
Alekseeva et al. | A study of hydrogen cracking in metals by the acoustoelasticity method | |
Gao et al. | Anisotropy and microstructural evolutions of X70 pipeline steel during tensile deformation | |
KR101186557B1 (ko) | 저온에서 동적 비틀림 시험 장치를 이용한 강재의 동적 변형 특성 평가 방법 | |
Collins et al. | Ultrasonic non-destructive evaluation of the matrix structure and the graphite shape in cast iron | |
KR100797281B1 (ko) | 초음파법에 의한 탄소강 페라이트 결정립 크기의 비파괴적측정방법 | |
Kumar et al. | Ultrasonic spectral analysis for microstructural characterization of austenitic and ferritic steels | |
Moghanizadeh et al. | Effect of heat treatment on an AISI 304 austenitic stainless steel evaluated by the ultrasonic attenuation coefficient | |
Yin et al. | Determination of grain size in deep drawing steel sheet by laser ultrasonics | |
Ünal et al. | The mean grain size determination of boron carbide (B4C)–aluminium (Al) and boron carbide (B4C)–nickel (Ni) composites by ultrasonic velocity technique | |
Ahn et al. | Effect of microstructure of low carbon steels on ultrasonic attenuation | |
Arii et al. | Slow crack growth and acoustic emission characteristics in COD test | |
Mukhopadhyay et al. | The influence of notch on the acoustic emission generated during tensile testing of nuclear grade AISI type 304 stainless steel | |
Shankar et al. | Nitrogen redistribution, microstructure, and elastic constant evaluation using ultrasonics in aged 316LN stainless steels | |
Yamanaka et al. | Application of scanning acoustic microscope to the study of fracture and wear | |
Serebryanyi et al. | Acoustic and X-ray diffraction texture parameters and the elastic constants of low-carbon steel before and after fatigue tests | |
Nam et al. | Evaluation of fracture appearance transition temperature to forged 3Cr–1Mo–0.25 V steel using ultrasonic characteristics | |
CN114295505A (zh) | 一种奥氏体不锈钢热处理状态快速检验方法 | |
JPH06258299A (ja) | 結晶粒度測定方法 | |
KR100448599B1 (ko) | 래스 마르텐사이트강의 유효결정립 크기의 비파괴적 측정방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E902 | Notification of reason for refusal | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20130103 Year of fee payment: 6 |
|
FPAY | Annual fee payment |
Payment date: 20140115 Year of fee payment: 7 |
|
FPAY | Annual fee payment |
Payment date: 20150109 Year of fee payment: 8 |
|
FPAY | Annual fee payment |
Payment date: 20160113 Year of fee payment: 9 |
|
FPAY | Annual fee payment |
Payment date: 20170111 Year of fee payment: 10 |
|
FPAY | Annual fee payment |
Payment date: 20180111 Year of fee payment: 11 |
|
FPAY | Annual fee payment |
Payment date: 20190115 Year of fee payment: 12 |