1. Observe the surface condition
Pockmarking phenomenon: The surface of inferior titanium rods often has pitting, which is due to the irregular surface of titanium due to severe wear of the rolling groove. Therefore, when purchasing, pay special attention to whether the surface is flat and smooth.
Scratches: Inferior titanium rods are prone to scratches during production and transportation, which is caused by simple equipment or improper operation. Deep scratches will reduce the strength of titanium and affect the use effect.
2. Check the cross section and ribs
The horizontal ribs are thin and low: The horizontal ribs of inferior titanium rods are usually thin and low, and often appear to be incomplete. This is because the manufacturer pursues complex tolerances and the amount of pressure in the first few passes during the rolling process is too large.
Folding problem: Folding is a broken line defect formed on the surface of the titanium rod, which runs through the entire product longitudinally. Due to the pursuit of high efficiency and large pressure reduction, inferior titanium rods are prone to ears and folds in the next rolling. Folded products are prone to cracking after bending, which seriously affects the strength.
3. Pay attention to color and gloss
Color and gloss: High-quality titanium rods should have a metallic luster, while inferior titanium rods may appear light red or similar to pig iron. This is usually due to uneven raw materials, many impurities or irregular rolling temperatures.
4. Observe surface defects
Scarring phenomenon: The surface of inferior titanium rods is prone to scarring. This is because there are many impurities in the raw materials or the guide equipment is simple, which causes impurities to adhere to the rollers and produce scars. Scarring will affect the appearance and performance of titanium rods.
Crack problem: Cracks may also appear on the surface of inferior titanium rods, which is caused by the raw materials being adobe and having many pores. Cracks are easily generated by thermal stress during cooling, and cracks are formed after rolling.
5. Check size and shape
Cross-sectional shape: The cross-section of inferior titanium rods may be elliptical instead of standard round or square. This is because the manufacturer uses a larger reduction in the second pass before the finished roll in order to save materials. Titanium rods of this shape not only affect the appearance but also reduce the strength.
Summary: When purchasing titanium rods, you should carefully observe their surface conditions, check the cross-section and ribs, pay attention to color and gloss, and observe surface defects. Only by fully understanding and mastering these identification skills can you ensure that you buy high-quality titanium rod products.
