Quality Control Measures in the Production of Tita

Quality Control Measures in the Production of Titanium Welded Pipes

1. Raw Material Control

• Inspection of Titanium Strip Quality

When purchasing titanium strips, strictly check the indexes such as chemical composition and mechanical properties. Ensure that the titanium alloy grades of the titanium strips, such as TA1, TA2 or TA10, meet the production requirements to prevent product quality problems caused by unqualified raw materials.

• Surface Quality Inspection

Carefully examine whether there are scratches, oxide scales, inclusions and other defects on the surface of the titanium strips. These surface defects may cause potential quality hazards during the welding or subsequent processing, such as resulting in inclusions in the weld or unevenness on the surface of the pipe.

2. Welding Process Control

• Calibration of Welding Equipment

Regularly calibrate welding equipment (such as TIG welders, PAW welders) to ensure the accuracy of the output of welding parameters such as welding current and voltage. The stability of the equipment is crucial for welding quality, and inaccurate parameters may lead to welding defects.

• Optimization of Welding Parameters

Determine the optimal welding parameters through process tests according to factors such as the wall thickness and material of the pipe. These parameters include welding current, voltage, welding speed, shielding gas flow rate, etc. During the welding process, operate strictly in accordance with the optimized parameters and adjust them in a timely manner according to the actual situation (such as changes in welding positions).

• Monitoring of Shielding Gas

Install gas flow monitoring devices to monitor the flow rate and purity of the shielding gas (such as argon) in real time. Ensure that the shielding gas can effectively cover the welding pool and the heat-affected zone to prevent defects such as oxidation of the weld and porosity. At the same time, ensure the sealing of the gas supply system to avoid the mixing of external air.

3. Tube Forming Control

• Debugging of Forming Equipment

For tube forming equipment (such as roll bending forming machines), conduct debugging before production. Check whether the accuracy, spacing, angle and other parameters of the rolls meet the requirements to ensure the stability and precision of the tube forming process.

• Dimensional Precision Detection

During the tube forming process, regularly use tools such as calipers and laser diameter measuring instruments to detect the outer diameter, inner diameter, wall thickness and other dimensions of the tube. Once the dimensional deviation is found to exceed the allowable range, adjust the parameters of the forming equipment in a timely manner.

4. Heat Treatment Process Control

• Maintenance of Heat Treatment Equipment

Regularly maintain heat treatment equipment such as annealing furnaces to ensure good performance in terms of temperature control accuracy and heating uniformity. Inaccurate temperature control may lead to poor heat treatment effects of the pipe, such as incomplete stress elimination or unexpected changes in material properties.

• Control of Heat Treatment Parameters

Precisely control heat treatment parameters such as annealing temperature, time, cooling speed, etc. according to the material, wall thickness and welding conditions of the pipe. Record the parameters of the heat treatment process for traceability and quality analysis.

5. Quality Inspection Control

• Implementation of Non-destructive Testing

Adopt non-destructive testing technologies such as eddy current testing and ultrasonic testing to conduct comprehensive inspections on the pipes. Detect surface and internal defects of the pipes, such as cracks, porosity, incomplete penetration, etc., to ensure that the product quality meets the standard requirements. Mark and isolate the defective pipes detected to prevent unqualified products from flowing into the next process.

• Sampling Inspection of Finished Products

Conduct inspections on finished titanium welded pipes according to a certain sampling ratio. Check the appearance quality, dimensional precision, mechanical properties, corrosion resistance and other indexes of the pipes. Through sampling inspection, ensure the quality stability of batch products.