AWS探头和楔块

AWS探头和楔块

AWS探头和楔块符合美国焊接协会的结构焊接规范对用于焊缝检测中的角度声束组合件提出的特殊要求。

Advantages

• Transducers and wedges meet or exceed the specifications as set forth by the AWS Code Section D1.1
• Snail wedges use industry accepted hole spacing
• Captive screws included with the transducer
• Accupath style wedges marked with a five line graticule to assist in locating the beam exit point

AWS Transducers

* Wedges are available in standard refracted shear wave angles of 45°, 60° and 70° in steel. Please specify upon ordering.

Snail Wedges

*Distance between screws (center to center) is 1.00".

Accupath Wedges

*Distance between screws (center to center) is 1.062".

CDS楔块

CDS楔块可在钢材料中产生30度横波和70度纵波，从而通过30-70-70技术对与内壁相连的裂缝进行定量。

Understanding CDS

The 30-70-70 crack detection technique uses a single element transducer with a CDS wedge for detection and sizing of ID connected cracks. This technique uses a combination of three waves for sizing flaws of different depths.

• An OD creeping wave creates a 31.5 degree indirect shear, (red in diagram to the left), wave which mode converts to an ID creeping wave; this will produce a reflected signal on all ID connected cracks.
• A 30 degree shear wave, (yellow in diagram to the left), will reflect off the material ID at the critical angle and mode convert to a 70 degree longitudinal wave; a signal will be received by the transducer on mid-wall deep cracks.
• A 70 degree longitudinal wave, (blue in diagram to the left), will reflect off the tip of a deep wall crack.

Based on the presence or absence of these three waves, both detection and sizing of ID connected cracks is possible.

CDS Wedges

CDS Wedges are used in the "30-70-70" technique for crack detection and sizing. They are compatible with our replaceable miniature screw-in angle beam transducers, making them an economical alternative to other commercially available products.

Normal Incidence Shear Wave Transducers

Single element normal incidence Shear Wave Transducers contact transducers introduce shear waves directly into the test piece without the use of refracted wave mode conversion.

We recommend the use of our SWC shear wave couplant for general purpose testing.

Advantages:

• Generate shear waves which propagate perpendicular to the test surface
• For ease of alignment, the direction of the polarization of shear wave is nominally in line with the right angle connector
• The ratio of the longitudinal to shear wave components is generally below -30 dB

Applications:

• Shear wave velocity measurements
• Calculation of Young's Modulus of elasticity and shear modulus (see Technical Notes, page 46)
• Characterization of material grain structure

Transducer Configurator

Shear Wave Couplant

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