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Method of checking the hardness of the square tube is as follows: ① Scratch hardness. Mainly used to compare the degree of hardness of different minerals, the method is to choose a hard end of the sof...

After any workpiece is machined, there will remain prestressed on the surface. The residual compressive stress on the rectangular tube can improve the wear resistance of the rectangular tube and the p...

Residual stresses caused by uneven cooling of seamless square tubes. Residual stress is the internal self-equilibrium stress in the absence of external force. Hot-rolled steel of all kinds of cross-se...

In general 304 stainless steel tube mills polishing wheel speed of 2500m / min, the polishing considerations also used in polishing, using the polishing tape 150 to 240 to obtain a continuous hairline...

When it is necessary to produce several profiled tubes and the size of the strip used allows unification (eg several types of flat steel window tubes), only one set of profiled rolls is required and t...

Square tube quality must control the brightness after annealing. More influential factors are as follows:   1, The annealing temperature reaches the specified temperature. Stainless steel tube heat tr...