GB/T 33163-2016 in English
VALIDMetallic materials一Residual stress一With ultrasonic impact treatment
- Issued on:2016-10-13
- Implemented on:2017-09-01
- File Format:PDF
- Delivery:Within 1 day
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《GB/T 33163-2016金属材料 残余应力 超声冲击处理法》由TC183（全国钢标准化技术委员会）归口，TC183SC4（全国钢标准化技术委员会力学及工艺性能试验方法分会）执行，主管部门为中国钢铁工业协会。
Introduction
GB/T 33163—2016 Standard Interpretation
I. Standard Overview
GB/T 33163—2016 "Ultrasonic Impact Treatment of Residual Stress in Metallic Materials" is a Chinese national standard that specifies the terms and definitions, symbols and instructions, principles, methods and effect evaluation of ultrasonic impact treatment to eliminate residual stress in metallic materials. It is applicable to ultrasonic impact treatment of residual stress elimination of metallic components with a material thickness greater than 4mm, a yield strength not greater than 900MPa, and an elongation greater than 5%.
II. Technical Background and Significance
Residual stress is an inevitable phenomenon in the manufacturing process of metallic materials and may cause structural failure. Ultrasonic impact treatment is an effective method for eliminating residual stress. Ultrasonic impact treatment transmits ultrasonic vibration to the metal surface through a transducer to induce plastic deformation and reduce or eliminate tensile residual stress. This method is particularly suitable for complex steel structures, aluminum alloy structures and welded joints.
III. Comparison of standard frameworks
| Chapter | Content | Key analysis |
|---|---|---|
| Terms and definitions | Terms such as ultrasonic impact treatment, ultrasonic impact gun, and impact needle | Key terms:Ultrasonic impact treatment is used to eliminate residual stress and must be used in conjunction with the equipment in the standard appendix. |
| Symbols and instructions | Table 1: Symbols, their units and instructions | Key data:The diameter d of the impact needle is generally 3mm~6mm, and the length l does not exceed 10 times the diameter. |
| Treatment method | Equipment composition, preparation before treatment, treatment process and requirements for treatment of important components | Implementation steps:The angle between the impact gun and the surface of the parent material is 40°~80°, and the treatment speed is 50mm/min~300mm/min. |
IV. Explanation of professional terms
Ultrasonic Impact Treatment:Ultrasonic generator transmits high-frequency vibration to the metal surface to induce plastic deformation to eliminate residual stress. It is suitable for complex components and dissimilar welded joints.
Impact Needle:A key component for transmitting ultrasonic vibration, with a diameter of 3mm~6mm and made of W18Cr4V. The shape of the end affects the treatment effect, semicircular for weld toe, and large arc for flat surface.
V. Implementation Suggestions
5.1 Equipment Selection and Maintenance
The equipment should have frequency tracking and constant amplitude output functions, and the ultrasonic impact gun can be operated manually or automatically. The selection of the impact needle diameter needs to be determined according to the material properties: 3mm~6mm for aluminum alloy and magnesium alloy; 3mm~5mm for high-strength steel and titanium alloy.
5.2 Processing Parameter Optimization
The processing parameters of different materials refer to Table B.1, and the key parameters include amplitude a (10μm~50μm) and impact needle diameter d (3mm~6mm). The higher the yield strength, the more the number of processing times and speed need to be adjusted.
5.3 Quality Control
Qualitative evaluation: Check that the grooves are continuous and uniform; quantitative evaluation: the coverage rate is not less than 100%, which can be verified by the ray method or indentation strain method.
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