Advantages and Disadvantages of Hot Rolling Seamless Steel Pipe

We have mention the definition of hot rolling seamless steel pipe previously, today, Prime Steel Pipe will continue to talk about the advantages and disadvantages of hot rolling seamless steel tube with all of you.

Advantages of hot rolling seamless steel pipe

Can damage the ingot casting organization, refine the grain of steel, and eliminate the defects of microstructure, so that the steel structure is dense, mechanical properties improved. This improvement is mainly reflected in the rolling direction, so that the steel to a certain extent is no longer an isotropic body; pouring the formation of bubbles, cracks and loose, but also in the high temperature and pressure under the welding.

Disadvantages of hot rolling seamless steel pipe

1. After hot rolling, non-metallic inclusions (mainly sulfides and oxides, as well as silicates) inside the steel are pressed into flakes and delamination (interlayer). Stratification makes the performance of the steel in the thickness direction greatly deteriorated, and there may be tearing occurs when the weld shrinks. The local strain induced by the weld shrinkage often reaches several times the yield point strain, much larger than the load caused by the load;
2. Unstable cooling caused by residual stress. Residual stress is in the absence of external force under the action of internal self-balanced, all kinds of cross-section of hot-rolled steel have such residual stress, the general steel cross-sectional size, the greater the residual stress. Although the residual stress is self-balanced, but the steel components under the action of external force or have a certain impact. Such as deformation, stability, anti-fatigue and other aspects may have a negative effect.
3. Hot-rolled steel products, for the thickness and side width of this bad control. We are familiar with the thermal expansion and contraction, because the beginning of the hot rolled out even if the length of the thickness of the standard, the final cooling or there will be a certain negative difference, the wider the width of the gap, the thicker the more obvious the performance. So for large steel, for the steel side width, thickness, length, angle, and the edge can not be too precise requirements.
Advertisements

About Hunan Prime Steel Pipe Co., Ltd

HUNAN PRIME STEEL PIPE is the export gateway of SHINESTAR HOLDINGS GROUP. We are dedicated in providing and exporting high performance-price ratio welded & seamless steel pipes and fittings covering various steel grades. At Prime Steel Pipe, we believe that honest communication, expertise in our industry, and prompt execution lead to strong long-term relationships. Our professioanl team provides " one-stop procurement" servics to coordinate with your project regulation, site and terrain, and ensure the best quality of products by assigning skillful experts at every stage of production. Our principles is to keep the honesty in mind, to win reputation by trust. We strives to providing quality products, competitive price and value-added services to our clients throughout the world.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: