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冷拔无缝钢管是如何生产的?相应的步骤和生产工艺

发布日期:2019-06-30 浏览次数:1

冷拔无缝钢管在钢管中的地位是比较高的,有着很多的比较大的因素,冷拔无缝钢管主要的使用量已经是占到了百分之九十以上,在各行业中都是应用到的。我国的冷拔无缝钢管厂家都是在广泛进行生产来的,截止目前我国每年的厂家的数量也是在不断地进行持续增加的,可见就是得益于冷拔无缝钢管的性质和生产条件进行决定的,常见的生产的工艺和流程比较复杂,具体的原因如下:

The status of cold-drawn seamless steel tube in steel tube is relatively high, and there are many larger factors. The main usage of cold-drawn seamless steel tube has accounted for more than 90 percent, which is applied in various industries. China's cold-drawn seamless steel pipe manufacturers are widely produced, up to the present, the number of manufacturers in our country is constantly increasing every year. It can be seen that the nature and production conditions of cold-drawn seamless steel pipe are determined. Common production processes and processes are more complex. The specific reasons are as follows: 冷拔无缝钢管是用钢锭或实心管坯经穿孔制成毛管,然后经热轧、冷轧或冷拨制成。冷拔无缝钢管在我国钢管业中具有重要的地位。据不完全统计,我国现有无缝管生产企业约240多家,冷拔无缝钢管机组约250多套,年产能力约450多万吨。从口径看,<φ76的,占35%,<φ159-650的,占25%。从品种看,一般用途管190万吨,占54%;石油管76万吨,占5.7%;液压支柱、精密管15万吨,占4.3%;不锈管、轴承管、汽车管共5万吨,占1.4%。

Cold-drawn seamless steel tube is made of steel ingot or solid billet through perforation and then hot-rolled, cold-rolled or cold-drawn. Cold-drawn seamless steel pipe plays an important role in China's steel pipe industry. According to incomplete statistics, there are more than 240 seamless pipe production enterprises in our country, and about 250 cold-drawn seamless pipe production units, with an annual production capacity of more than 4.5 million tons. In terms of caliber, 35% of them are < 76 and 25% are < 159-650. In terms of varieties, 1.9 million tons of general purpose pipes, accounting for 54%, 760,000 tons of petroleum pipes, accounting for 5.7%, 150,000 tons of hydraulic props and precision pipes, accounting for 4.3%, and 50,000 tons of stainless pipes, bearing pipes and automobile pipes, accounting for 1.4%.


冷拔无缝钢管生产工艺都是比较丰富的,一般是按照相应的步骤进行加工和生产的:

Cold-drawn seamless steel tube production process is relatively rich, generally in accordance with the corresponding steps of processing and production:


①热轧冷拔无缝钢管主要生产工序(△主要检验工序):

(1) Major production processes of hot-rolled and cold-drawn seamless steel tubes (Delta main inspection processes):


管坯准备及检查△→管坯加热→穿孔→轧管→钢管再加热→定(减)径→热处理△→成品管矫直→精整→检验△(无损、理化、台检) →入库

Billet preparation and inspection billet heating piercing rolling pipe reheating sizing heat treatment straightening finishing inspection storage


②冷轧(拔)冷拔无缝钢管主要生产工序:

(2) Major production processes of cold-rolled (drawn) cold-drawn seamless steel tubes:


坯料准备→酸洗润滑→冷轧(拔)→热处理→矫直→精整→检验

Billet preparation pickling lubrication cold rolling (drawing) heat treatment straightening finishing inspection


一般的冷拔无缝钢管的生产工艺可以分为冷拔与热轧两种,冷轧冷拔无缝钢管的生产流程一般要比热轧要复杂,管坯首先要进行三辊连轧,挤压后要进行定径测试,如果表面没有响应裂纹后圆管要经过割机进行切割,切割成长度约一米的坯料。然后进入退火流程,退火要用酸性液体进行酸洗,酸洗时要注意表面是否有大量的起泡产生,如果有大量的起泡产生说明钢管的质量达不到相应的标准。外观上冷轧冷拔无缝钢管要短于热轧冷拔无缝钢管,冷轧冷拔无缝钢管的壁厚一般比热轧冷拔无缝钢管要小,但是表面看起来比厚壁冷拔无缝钢管更加明亮,表面没有太多的粗糙,口径也没有太多的毛刺。

The production process of cold-drawn seamless steel tube can be divided into two kinds: cold-drawn and hot-rolled. The production process of cold-drawn seamless steel tube is generally more complicated than hot-rolled. The billet must be rolled three rolls in a row first, and the sizing test must be carried out after extrusion. If the surface does not respond to cracks, the round tube must be cut by a cutting machine, and the billet with a growth of about one meter is cut. Then enter the annealing process, annealing to acid liquid pickling, pickling should pay attention to whether there is a large number of bubbles on the surface, if there is a large number of bubbles, indicating that the quality of steel pipes can not meet the corresponding standards. Cold-rolled and cold-drawn seamless steel tubes are shorter in appearance than hot-rolled and cold-drawn seamless steel tubes. The wall thickness of cold-rolled and cold-drawn seamless steel tubes is generally smaller than that of hot-rolled and cold-drawn seamless steel tubes, but the surface looks brighter than that of thick-walled and cold-drawn seamless steel tubes. The surface is not too rough and the caliber is not too much burr.

冷拔无缝钢管用途比较广泛,使用的范围比较广,因此在进行使用的话要注意质量特征,做出来合理的选择!

Cold-drawn seamless steel tubes are widely used and widely used. Therefore, we should pay attention to the quality characteristics and make reasonable choices when using them.


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