GB/T 1786-2008Forging tortillas ultrasonic testing method (English PDF)

Foreword

This standard and American Standard AMS-STD-2154-05 "deformation of the metal ultrasonic inspection procedures," the non-equivalent.

This standard replaces GB/T 1786-1990 "Forged round cake ultrasonic inspection." this standard compared with GB/T 1786-1990, the main changes are as follows.

--- Allows for increased contact method test;

--- Canceled the rotary speed of the provisions;

--- Added workpiece machined surface roughness requirements;

--- Increasing the B-scan and C-scan display method display method;

--- Increase the quality level of the division;

--- Increasing the quality assurance requirements.

Appendix A of this standard is a normative appendix.

The standard proposed by China Iron and Steel Association.

This standard is under the jurisdiction of the National Steel Standardization Technical Committee.

This standard is mainly drafted by. Maanshan Iron & Steel Co., Ltd., Metallurgical Industry Information Standards Institute.

1 Scope

This standard specifies the reference block with a flat bottom hole, immersion or ultrasonic inspection contact method Wrought tortillas (hereinafter referred to as pie) method the scope of testing personnel, testing equipment and facilities, reference block, test conditions and procedures, defect evaluation, quality assurance and testing regulations report.

This standard applies to the cross-sectional thickness not less than 8mm rotation (such as turbine disc, pressure plate filter machine, etc.) and high-temperature alloy forged steel round cake Ultrasonic flaw testing. Other uses ultrasonic examination of pie can be negotiated by both sides with reference to use.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 9445 NDT personnel qualification and certification GB/T 11259 Ultrasonic testing of a test block for steel production and Calibration JB/T 10061 A-mode pulse reflection type ultrasonic flaw detector General technical requirements

3 Inspectors

Inspection by authorized personnel to obtain relevant qualification certificates and ultrasonic technology in the operation. Detection qualified person should be consistent GB/T 9445 standards and requirements, personnel with technical qualifications II II grade level or above certificate issued by the supervision and report.

4 Testing instruments and equipment