How To Identify The Good And Bad Titanium Rods?

1, the appearance of shoddy products often have the appearance of hemp surface.
Pockmarked because of the rolling groove wear and tear caused by the irregularity of the titanium appearance of the shortcomings of unevenness. Because of the shoddy titanium rod manufacturers to seek Yingli, often present rolling groove rolling overrun. 2, shoddy products are simple to scrape, the reason is that the shoddy titanium rod manufacturers simple equipment, easy to burr, scrape titanium appearance. Scraping reduces the strength of titanium.
3, shoddy products of the transverse rib thin and low, often showing the phenomenon of filling, the reason is that manufacturers in order to reach a large negative tolerance, the products of the first few passes under the amount of bias, the iron type of small, hole type filling is not enough.
4, shoddy products are easy to show folding.
Folding is the titanium rod appearance of the composition of the folding line, this shortcoming often penetrate the entire product longitudinal. Folding occurs because of shoddy manufacturers seek high efficiency, the amount of underpressure is large, the occurrence of ear, the next - channel rolling occurs when folding, folding the product after bending will crack, titanium strength of large pieces of low.
5, the appearance of shoddy products are prone to scarring.
There are two reasons: (1), shoddy titanium bar raw materials are not uniform, more impurities. (2), shoddy material manufacturers equipment is simple, simple sticky titanium, these impurities rolled ~ easy to occur after scarring.
6, the appearance of shoddy products are prone to cracks, the reason is that its billet is adobe, adobe porosity, adobe in the cooling process because of the effectiveness of the thermal stress, cracks, after rolling there are cracks.

7, shoddy products without metallic luster, reddish or similar to the color of pig iron.
There are two reasons for this two, its billet is adobe. Shoddy material rolling temperature is not standardized, their titanium temperature is measured visually, so that it can not be rolled according to the rules of the austenite region, the function of titanium material can not be qualified.
8, shoddy products have an oval cross-section.
The reason is that manufacturers in order to save information, products stick before the second channel of the under pressure is large, the strength of this threaded titanium greatly reduced, and also does not meet the specifications of the external dimensions of the threaded titanium.