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钢管的好坏的辨别方法

来源:http://www.jnxxjm.com

【 发布于:2019-02-19 18:18:45 】


    1.伪劣无缝钢管容易刮伤,原因是伪劣无缝钢管厂家设备简陋,易产生毛刺,刮伤钢材表面。深度刮伤降低钢材的强度。


    1. False and inferior seamless steel pipes are easy to scratch, because the fake and inferior seamless steel pipe manufacturer's equipment is simple, easy to produce burrs, scratch the steel surface. Deep scratch reduces the strength of steel.


    2.伪劣无缝钢管无金属光泽,呈淡红色或类似生铁的颜色。


    2. The fake and inferior seamless steel pipe has no metallic luster and is light red or similar to pig iron.

QQ截图20190219182125.png

    3.伪劣无缝钢管的横筋细而低,经常出现充不满的现象,原因是厂家为达到大的负公差,成品前几道的压下量偏大,铁型偏小,孔型充不满。


    3. The transverse bars of fake and inferior seamless steel tubes are thin and low, and the phenomenon of filling is often unsatisfactory. The reason is that in order to achieve a large negative tolerance, the manufacturer has a large reduction in the first several passes of the finished products, a small iron shape and a unsatisfactory filling of the passes.


    4.伪劣无缝钢管的横截面呈椭圆形,原因是厂家为了节约材料,成品辊前二道的压下量偏大,这种无缝钢管的强度大大地下降,而且也不符合无缝钢管外形尺寸的标准。


    4. The cross-section of the fake and inferior seamless steel tube is elliptical, because in order to save material, the reduction of the first two rolls of the finished product is too large. The strength of this kind of seamless steel tube decreases greatly, and it does not conform to the standard of the shape and size of the seamless steel tube.



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