GB/T 18329.3-2021Plain bearings - Metallic multilayer plain bearings - Part 3: Non-destructive penetrant testing (English PDF)

Foreword

GB/T 18329 ``Multilayer Metal Sliding Bearings for Sliding Bearings'' is divided into the following 4 parts.

---Part 1.Ultrasonic non-destructive testing of bond strength;

---Part 2.Destructive test of bond strength of alloy thickness >= 2mm;

---Part 3.Non-destructive penetration inspection;

---Part 4.Ultrasonic penetration non-destructive testing of the bonding quality of alloy thickness >= 0.3mm.

This part is Part 3 of GB/T 18329.

This section was drafted in accordance with the rules given in GB/T 1.1-2009.

This part uses the redrafting method to modify and adopt ISO 4386-3.2018 ``Sliding Bearings Multilayer Metal Sliding Bearings Part 3.None

Damage and Penetration Inspection.

The technical differences between this part and ISO 4386-3.2018 and the reasons are as follows.

---Because ASTME1417 quoted in 8.2 does not correspond to national standards or industry standards, and the penetrant used in domestic production and

The developer products are not currently compliant with ASTME1417.In order to meet the actual production and use needs of our country, it is added on the basis of the original requirements.

Negotiate the choice of terms and give the possible results in the form of "notes".

This part was proposed by China Machinery Industry Federation.

This part is under the jurisdiction of the National Sliding Bearing Standardization Technical Committee (SAC/TC236).

Drafting organizations of this section. China Machinery Productivity Promotion Center, Hunan Chongde Technology Co., Ltd., Shenke Sliding Bearing Co., Ltd.,

Zhejiang Zhuji Bearing Factory Co., Ltd., Yixing Huanyu Bearing Manufacturing Co., Ltd., Zhejiang Changsheng Sliding Bearing Co., Ltd., Zhejiang

Shuangfei Oilless Bearing Co., Ltd., Zhejiang Zhongda Precision Components Co., Ltd., Lin'an Dongfang Sliding Bearing Co., Ltd., Jiashan Sanfu

Sliding Bearing Co., Ltd., Jiaxing Meiteer Baoxin Machinery Industry Co., Ltd.

This part is explained by the National Technical Committee for Standardization of Sliding Bearings.

Multi-layer metal sliding bearings

Part 3.Non-destructive penetrant inspection

1 Scope

This part of GB/T 18329 specifies the non-destructive leakage for determining bearing bonding defects and sliding surface defects (i.e. surface discontinuities).

Through inspection method. This method is suitable for inspection.

a) The end face and the counter face of the multi-layer sliding bearing are located in the transition area between the bearing backing and the bearing alloy material, and cannot be

GB/T 18329.1 conducts ultrasonic inspection for bonding defects.

b) Defects in the sliding surface of the bearing.

Penetration inspection is generally carried out after finishing the multi-layer sliding bearing.

The inspection of combined defects is usually applicable to multilayer sliding bearings composed of steel, cast steel or cast bronze as the backing material, and can also be used for other bearings

The material of the bearing product is combined with the auxiliary inspection of the defect during the processing. Bearing backing materials that cannot be tinned or difficult to tin, such as pearlite

Special cast iron materials, stainless steel or cast aluminum, because there is no bonding layer between the bearing backing and the bearing alloy material, this method cannot be used to test the bonding

defect.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article

Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 18329.1 Ultrasonic non-destructive testing of the bonding strength of multi-layer metal sliding bearings of sliding bearings (GB/T 18329.1-

2001, idtISO 4386-1.1992)

ASTME1417 Standard Practice for Liquid Penetrant Testing (Standard Practice for Liquid Penetrant Testing)

3 Terms and definitions

No terms and definitions are given in this section.

4 Safety precautions

Penetration inspection often uses harmful, flammable and/or volatile substances, so accident prevention, toxic substance disposal and environmental protection should be adopted

And other relevant protective measures. The inspection should be carried out by qualified personnel with penetrant inspection qualifications.

5 Preparation of the surface to be inspected

6 Penetration treatment

6.1 Water-washing or solvent-removing penetrants should be used during the inspection. The temperature of the surface to be inspected should be between 10°C and 50°C.

Note. Penetrants with higher viscosity can improve cleaning safety.

6.2 The penetrant should be applied by immersion, brushing or spraying. The penetration time should be controlled between 10min and 20min. for

For penetrants with higher viscosity, the penetration time should be at least 20min. During the entire penetration time, the surface to be inspected should always remain sufficiently wet.

7 Removal of excess penetrant

Water (non-organic solvent) should be used to remove excess penetrant by flushing or spraying, and the cleaning water pressure should be less than 0.2MPa (2bar); should be used

Dip a clean lint-free cloth with a little cleaning agent of the same family to gently remove the solvent-removing penetrant. Follow the instructions of the penetrant manufacturer to avoid

Avoid over-rinsing. It should be ensured that the penetrant is completely removed from the surface to be inspected, especially the grooves, grooves and corners. Water or organic solvent used to remove penetrant

The temperature of the agent should not exceed 50°C.

8 Use of imaging agent

9 Inspection

10 post-processing

After the inspection, only when the penetrant may have an impact on the subsequent process or use, it is necessary to use appropriate methods to remove it.

11 Inspection report

The inspection report should include the following.

b) The size and material of the sliding bearing;

c) The name, manufacturer, model and batch number of the inspected material;

d) The inspection results of the transition area of the bearing backing and the bearing alloy material bonding layer, the description of the allowable defects and the defects that have been found

category;

e) The inspection results of the sliding surface, the description of the allowable defects and the level of the defects found;

f) Inspection time, place and inspector's signature.