Titanium coil tube due to their excellent corrosion resistance and high strength, are widely used in fields with stringent material performance requirements, such as chemical engineering and marine engineering. However, the production process is complex and technically demanding, with every step directly impacting the quality and performance of the final product. This article will provide an in-depth analysis of the key technical points in titanium coil tube processing, providing a reference for producing high-quality titanium coil tubes.
1. Raw Material Control: Laying the Foundation for Quality
Raw material quality is a fundamental factor in determining the performance of titanium coil tubes. In titanium coil tube production, high-purity titanium with extremely low impurity content must be selected. This is because even trace impurities can affect the crystal structure of titanium, thereby reducing its corrosion resistance and mechanical properties.
Incoming titanium ingots undergo a rigorous inspection process. Chemical composition analysis is a primary step, using advanced testing equipment to accurately determine the content of various elements in the titanium ingots to ensure they meet product design requirements. At the same time, mechanical property tests, including tensile strength, yield strength, and elongation, are conducted. Only titanium ingots that meet all performance standards can enter the subsequent production process, eliminating the use of substandard raw materials at the source. This rigorous raw material control method has attracted the attention and coverage of Titanium Home, demonstrating the company's professionalism and strictness in raw material management.
2.Processing: Precise Parameter Control
(1) Rolling Process
Rolling is a critical step in titanium coil tube production, and properly setting rolling parameters is crucial. Due to the unique physical and chemical properties of titanium, parameters such as the roll gap, rolling speed, and temperature must be precisely adjusted according to these characteristics.
A roll gap that is too small will subject the titanium to excessive extrusion stress, which can easily cause cracking. A roll gap that is too large will make it difficult to maintain dimensional accuracy after rolling, resulting in uneven wall thickness. A roll speed that is too fast may cause the titanium to deform too rapidly, leading to rapid work hardening and increasing the risk of cracking. A roll speed that is too slow will affect production efficiency and may cause the titanium to remain in contact with the rolls for too long, resulting in surface defects such as scratches. Temperature control is also crucial. Titanium exhibits different plasticity and deformation resistance at different temperatures. The appropriate rolling temperature ensures good plasticity while reducing deformation resistance, facilitating roll forming. Therefore, during the rolling process, temperature fluctuations must be closely monitored, and heating or cooling devices must be used to maintain the temperature within a reasonable range.
(2) Welding Process
Welding is one of the most critical steps in titanium coil tube production, and its quality directly impacts its performance and safety. Because titanium easily reacts with oxygen, nitrogen, and other gases in the air at high temperatures, forming brittle compounds, which reduces the toughness and corrosion resistance of the weld, excellent inert gas shielded welding techniques are essential.
During the welding process, the welding current, voltage, and speed must be strictly controlled. Excessive current can overheat the weld metal, resulting in defects such as burn-through and porosity. Too low a current can lead to insufficient penetration and a lack of fusion at the weld root. Too high a voltage and an arc length can reduce the shielding gas's effectiveness in protecting the weld pool. Too low a voltage can lead to arc instability, affecting weld quality. Too high a speed can result in insufficient weld width and penetration. Too slow a speed can expand the heat-affected zone and reduce joint performance. Only by precisely controlling these parameters can reliable weld quality, free of defects such as porosity, slag inclusions, and cracks, be ensured, ensuring the sealing and strength of the titanium coil tube.
3. Surface Treatment: Improving Product Performance
Surface treatment is an essential step in titanium coil tube production. It effectively removes oxide scale and imperfections from the titanium tube surface, improving the product's smoothness and corrosion resistance.
Acid pickling is a commonly used surface treatment method. It involves immersing the titanium tube in a specific acid solution to remove surface oxide scale and rust products. During the pickling process, the acid concentration, temperature, and pickling time must be strictly controlled. Excessively high acid concentrations can cause excessive corrosion on the titanium tube surface; too low a concentration will not effectively remove oxide scale. Excessively high temperatures accelerate the pickling reaction, potentially increasing surface roughness; too low a temperature slows the pickling process. Prolonged pickling time can also damage the titanium tube surface; too short a time will incompletely remove oxide scale.
Polishing further improves the surface smoothness of the titanium tube, achieving a mirror-like finish. Polishing methods include mechanical polishing and chemical polishing. The appropriate polishing process should be selected based on the specific requirements of the product. After surface treatment, titanium coil tubes not only enhance their appearance but also significantly improve their corrosion resistance, enabling long-term, stable use in harsh environments.
4. Quality Inspection: Ensuring Product Qualification
Quality inspection is a crucial measure to ensure that titanium coil tubes meet standard requirements. During the production process, finished products undergo comprehensive quality inspections, covering aspects such as dimensional accuracy, wall thickness uniformity, and pressure resistance testing.
Dimensional accuracy testing uses high-precision measuring instruments such as calipers and micrometers to precisely measure the outer diameter, inner diameter, and length of the titanium coil tubes to ensure they meet design requirements. Wall thickness uniformity testing uses equipment such as ultrasonic thickness gauges to measure the wall thickness at different locations on the titanium coil tubes to ensure that wall thickness variations are within acceptable limits. Pressure resistance testing is a key method for verifying the sealing and strength of titanium coil tubes. The coils are filled with water or other media, gradually pressurized to a specified pressure, maintained for a specified period, and observed for leaks to verify their ability to withstand the pressures encountered in actual use.
5. Production Environment and Personnel Management: Creating High-Quality Production Conditions
(1) Production Environment
The production environment has a significant impact on the quality of titanium coil tubes. The workshop should be kept clean and dry to prevent dust and other contaminants from adhering to the product surface. Impurities in dust may become embedded in the titanium tube surface during subsequent processing, affecting its corrosion resistance and appearance. Excessive humidity can cause rust on the titanium tube surface. Therefore, the workshop should be regularly cleaned and ventilated, and air purification equipment should be installed to ensure a clean production environment.
(2) Personnel Management
Operators are a key factor in the production process, and their skills and operating procedures directly affect product quality. Therefore, operators must receive professional training and be familiar with the titanium coil tube production process and key quality control points. Training covers raw material inspection, processing equipment operation, welding techniques, surface treatment processes, and quality inspection methods. Only when operators possess solid professional knowledge and proficient operating skills can production strictly adhere to process requirements and ensure that every step meets quality standards. titanium coil tube processing is a systematic project that requires strict control over multiple aspects, including raw material selection, processing parameter control, surface treatment, quality testing, production environment, and personnel management. Only through meticulous management and technological innovation, and continuous optimization of production processes, can high-quality titanium coil tubes be produced to meet the stringent requirements of high-performance materials in fields such as chemical engineering and marine engineering. With the continuous advancement of science and technology, titanium coil tube processing technology will continue to improve and develop, providing stronger support for the development of related industries.
Shaanxi Chuanghui Daye Metal Material CO.,Ltd offers titanium,tantalum, niobium metal products like bar, plate, wire, tube and machined products. Titanium coil tube is one of our main products. Pls feel free to contact us if you have any requirements.
E-mail: info@chdymetal.com
Mob.: 86-18049386902