CN105628789A - Nondestructive detection technology - Google Patents

Abstract

The invention discloses a nondestructive detection technology. The technology comprises the following steps: 1, carrying out ultrasonic flaw detection; 2, adjusting the sensitivity; 3, carrying out ultrasonic thickness measurement; and 4, carrying out ultrasonic flaw detection on welds, wherein devices are adopted in the invention. The technology has the advantages of simple operation, low requirements of experiences of operators, and high product quality.

Description

A kind of Non-Destructive Testing technique

Technical field

The present invention relates to a kind of Non-Destructive Testing technique.

Background technology

The adjustment in processing step and device parameter etc. of the existing Non-Destructive Testing technique there is also certain empirical and technical, for the operator newly started with, in addition it is also necessary to carry out substantial amounts of exercise and could grasp operation skill, produces the good product of quality.

Summary of the invention

In order to realize the purpose of the present invention, the present invention provides the Non-Destructive Testing technique of a kind of easy to operate, quick, easy left-hand seat;

For solving above-mentioned technical problem, the present invention adopts the following technical scheme that

A kind of Non-Destructive Testing technique, including following operation:

1), ultrasonic inspection technics

1.1) standard: JB/T4730.3-2005 is performed;

1.2) scanning mode: probe vertical is in steel plate rolling direction, and the parallel lines that spacing is 100mm carry out scanning; Groove periphery does 100% scanning;

1.3) surface requirements: flaw detection portion faces is polishing to expose metallic luster;

1.4) instrument and equipment:

1.4.1) PXUT-350, PXUT-320C, CTS-22A, CTS-23 ultrasonic reflectoscope;

1.4.2) probe: during thickness of slab �ġ�20mm, double-crystal normal probe, chip area is not less than 150mm2, and pop one's head in nominal frequency 5.0MHz; During �� > 20mm, straight probe of single crystal, circular wafer diameter phi 14��25mm, pop one's head in nominal frequency 2.5MHz;

1.4.3) couplant: chemical paste or machine oil;

2), sensitivity adjusting

2.1), during thickness of slab��20mm, with step bar, workpiece uniform thickness position first time end wave height is adjusted full-scale 50%, then improves 10dB as detection sensitivity;

2.2), during thickness of slab > 20mm, test block flat-bottom hole first reflection wave height should be adjusted full scale 50% as detection sensitivity;

3) ultrasonic thickness measurement

3.1) surface requirements: tested portion faces answers wipe oil, oxide skin, paint, exposes metallic luster;

3.1) instrument and equipment: LA-30 or UTM-101H, precision should reach �� (T%+0.1) mm(T is wall thickness);

3.1.1) couplant: chemical paste or machine oil

3.1.2) instrument regulation: probe is placed in and in the suitable test block of Thickness Measurement by Microwave, is calibrated shown numeral and test block consistency of thickness;

3.1.3), during thickness measuring, probe is applied certain pressure, is generally 20��30N; 6.3.2.6 acceptance requirement: every block plate need to survey five points, one of them point is positioned at steel plate center, and four additional point lays respectively at steel plate corner, is about 250mm from steel plate Edge Distance; Institute's drafting board actual measurement thickness cannot be less than nominal thickness and deducts the minus deviation of steel plate thickness;

4), weld seam supersonic detection

4.1) standard: JB/T4730.3-2005 is performed;

4.2) flaw detection opportunity: after welding terminates 36 hours, the position that need to do ray detection should after ray detection;

4.3) surface requirements: both sides polishing is clean, and surface roughness reaches 6.3 ��m, and every side width is 2TK+50mm;

4.4) instrument and equipment:

4.4.1) PXUT-350, PXUT-320C, CTS-22A, CTS-23 ultrasonic reflectoscope;

4.4.2) probe, its K value is chosen with reference to table 1;

Table 1: choosing of probe K value

4.4.3) test block: CSK-IA, CSK-IIIA; 6.3.3.5 couplant: chemical paste or machine oil;

4.4.4) combination sensitivity adjusting: measured data in test block is depicted as evaluation line, quantitative line and sentences scrap wire by probe used and instrument according to table 2; Flaw detection Scanning sensitivity is not lower than the evaluation line sensitivity at maximum sound path place;

Table 2: combination sensitivity adjusting

The basic scanning modes such as 4.4.5) scanning mode: according to thickness of slab, slope type and welding method, can adopt sawtooth pattern scanning, lateral scan with oblique angle, parallel scan, and probe can adopt all around, corner, surround; One side bilateral is adopted to carry out scanning, it is ensured that scanning is to whole section of weld joint; During mother metal thickness G reatT.GreaT.GT 46mm, the direct wave of two-sided bilateral is adopted to detect;

4.5) defect quantitative and ranking: by JB/T4730.3-2005 standard-required, I grade of examination;

4.6) process of abnormal phenomena in detection: instrument often detects 3 hours and should check once, if detection data exceed allowable error, then first 3 hours interior detection data should give repetition measurement.

The present invention is simple to operate, and operator's skill requirement is low, and product quality is high.

Detailed description of the invention

Below in conjunction with embodiment, the invention will be further described:

A kind of Non-Destructive Testing technique, including following operation:

1), ultrasonic inspection technics

1.1) standard: JB/T4730.3-2005 is performed;

1.2) scanning mode: probe vertical is in steel plate rolling direction, and the parallel lines that spacing is 100mm carry out scanning; Groove periphery does 100% scanning;

1.3) surface requirements: flaw detection portion faces is polishing to expose metallic luster;

1.4) instrument and equipment:

1.4.1) PXUT-350, PXUT-320C, CTS-22A, CTS-23 ultrasonic reflectoscope;

1.4.2) probe: during thickness of slab �ġ�20mm, double-crystal normal probe, chip area is not less than 150mm2, and pop one's head in nominal frequency 5.0MHz; During �� > 20mm, straight probe of single crystal, circular wafer diameter phi 14��25mm, pop one's head in nominal frequency 2.5MHz;

1.4.3) couplant: chemical paste or machine oil;

2), sensitivity adjusting

2.1), during thickness of slab��20mm, with step bar, workpiece uniform thickness position first time end wave height is adjusted full-scale 50%, then improves 10dB as detection sensitivity;

2.2), during thickness of slab > 20mm, test block flat-bottom hole first reflection wave height should be adjusted full scale 50% as detection sensitivity;

3) ultrasonic thickness measurement

3.1) surface requirements: tested portion faces answers wipe oil, oxide skin, paint, exposes metallic luster;

3.1) instrument and equipment: LA-30 or UTM-101H, precision should reach �� (T%+0.1) mm(T is wall thickness);

3.1.1) couplant: chemical paste or machine oil

3.1.2) instrument regulation: probe is placed in and in the suitable test block of Thickness Measurement by Microwave, is calibrated shown numeral and test block consistency of thickness;

3.1.3), during thickness measuring, probe is applied certain pressure, is generally 20��30N; 6.3.2.6 acceptance requirement: every block plate need to survey five points, one of them point is positioned at steel plate center, and four additional point lays respectively at steel plate corner, is about 250mm from steel plate Edge Distance; Institute's drafting board actual measurement thickness cannot be less than nominal thickness and deducts the minus deviation of steel plate thickness;

4), weld seam supersonic detection

4.1) standard: JB/T4730.3-2005 is performed;

4.2) flaw detection opportunity: after welding terminates 36 hours, the position that need to do ray detection should after ray detection;

4.3) surface requirements: both sides polishing is clean, and surface roughness reaches 6.3 ��m, and every side width is 2TK+50mm;

4.4) instrument and equipment:

4.4.1) PXUT-350, PXUT-320C, CTS-22A, CTS-23 ultrasonic reflectoscope;

4.4.2) probe, its K value is chosen with reference to table 1;

Table 1: choosing of probe K value

4.4.3) test block: CSK-IA, CSK-IIIA; 6.3.3.5 couplant: chemical paste or machine oil;

4.4.4) combination sensitivity adjusting: measured data in test block is depicted as evaluation line, quantitative line and sentences scrap wire by probe used and instrument according to table 2; Flaw detection Scanning sensitivity is not lower than the evaluation line sensitivity at maximum sound path place;

Table 2: combination sensitivity adjusting

The basic scanning modes such as 4.4.5) scanning mode: according to thickness of slab, slope type and welding method, can adopt sawtooth pattern scanning, lateral scan with oblique angle, parallel scan, and probe can adopt all around, corner, surround; One side bilateral is adopted to carry out scanning, it is ensured that scanning is to whole section of weld joint; During mother metal thickness G reatT.GreaT.GT 46mm, the direct wave of two-sided bilateral is adopted to detect;

4.5) defect quantitative and ranking: by JB/T4730.3-2005 standard-required, I grade of examination;

4.6) process of abnormal phenomena in detection: instrument often detects 3 hours and should check once, if detection data exceed allowable error, then first 3 hours interior detection data should give repetition measurement.

Claims (1)

1. a Non-Destructive Testing technique, is characterized in that: include following operation:

1), ultrasonic inspection technics

1.1) standard: JB/T4730.3-2005 is performed;

1.2) scanning mode: probe vertical is in steel plate rolling direction, and the parallel lines that spacing is 100mm carry out scanning; Groove periphery does 100% scanning;

1.3) surface requirements: flaw detection portion faces is polishing to expose metallic luster;

1.4) instrument and equipment:

1.4.1) PXUT-350, PXUT-320C, CTS-22A, CTS-23 ultrasonic reflectoscope;

1.4.2) probe: during thickness of slab �ġ�20mm, double-crystal normal probe, chip area is not less than 150mm2, and pop one's head in nominal frequency 5.0MHz; During �� > 20mm, straight probe of single crystal, circular wafer diameter phi 14��25mm, pop one's head in nominal frequency 2.5MHz;

1.4.3) couplant: chemical paste or machine oil;

2), sensitivity adjusting

2.1), during thickness of slab��20mm, with step bar, workpiece uniform thickness position first time end wave height is adjusted full-scale 50%, then improves 10dB as detection sensitivity;

2.2), during thickness of slab > 20mm, test block flat-bottom hole first reflection wave height should be adjusted full scale 50% as detection sensitivity;

3) ultrasonic thickness measurement

3.1) surface requirements: tested portion faces answers wipe oil, oxide skin, paint, exposes metallic luster;

3.1) instrument and equipment: LA-30 or UTM-101H, precision should reach �� (T%+0.1) mm(T is wall thickness);

3.1.1) couplant: chemical paste or machine oil

3.1.2) instrument regulation: probe is placed in and in the suitable test block of Thickness Measurement by Microwave, is calibrated shown numeral and test block consistency of thickness;

3.1.3), during thickness measuring, probe is applied certain pressure, is generally 20��30N; 6.3.2.6 acceptance requirement: every block plate need to survey five points, one of them point is positioned at steel plate center, and four additional point lays respectively at steel plate corner, is about 250mm from steel plate Edge Distance; Institute's drafting board actual measurement thickness cannot be less than nominal thickness and deducts the minus deviation of steel plate thickness;

4), weld seam supersonic detection

4.1) standard: JB/T4730.3-2005 is performed;

4.2) flaw detection opportunity: after welding terminates 36 hours, the position that need to do ray detection should after ray detection;

4.3) surface requirements: both sides polishing is clean, and surface roughness reaches 6.3 ��m, and every side width is 2TK+50mm;

4.4) instrument and equipment:

4.4.1) PXUT-350, PXUT-320C, CTS-22A, CTS-23 ultrasonic reflectoscope;

4.4.2) probe, its K value is chosen with reference to table 1;

Table 1: choosing of probe K value

4.4.3) test block: CSK-IA, CSK-IIIA; 6.3.3.5 couplant: chemical paste or machine oil;

4.4.4) combination sensitivity adjusting: measured data in test block is depicted as evaluation line, quantitative line and sentences scrap wire by probe used and instrument according to table 2; Flaw detection Scanning sensitivity is not lower than the evaluation line sensitivity at maximum sound path place;

Table 2: combination sensitivity adjusting

The basic scanning modes such as 4.4.5) scanning mode: according to thickness of slab, slope type and welding method, can adopt sawtooth pattern scanning, lateral scan with oblique angle, parallel scan, and probe can adopt all around, corner, surround; One side bilateral is adopted to carry out scanning, it is ensured that scanning is to whole section of weld joint; During mother metal thickness G reatT.GreaT.GT 46mm, the direct wave of two-sided bilateral is adopted to detect;

4.5) defect quantitative and ranking: by JB/T4730.3-2005 standard-required, I grade of examination;

4.6) process of abnormal phenomena in detection: instrument often detects 3 hours and should check once, if detection data exceed allowable error, then first 3 hours interior detection data should give repetition measurement.