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厂家对无缝异型钢管的特点分析如下

发布时间:2019-04-28人气:60

无缝异型钢管的特点分析如下:其一、无缝异型钢管的壁厚越厚,它就越具有经济性和实用性,壁厚越薄,它的加工成本就会大幅度的上升;其次、该产品的工艺决定它的局限性能,一般无缝异型钢管精度低:壁厚不均匀、管内外表光亮度低、定尺成本高,且内外表还有麻点、黑点不易去除;其三、它的检测及整形必须离线处理。因此它在高压、高强度、机械结构用材方面体现了它的优越性。

The characteristics of seamless special-shaped steel pipe are analyzed as follows: first, the thicker the wall thickness is, the more economical and practical it will be. The thinner the wall thickness is, the higher the processing cost will be. Secondly, the process of this product determines its limited performance. Generally, the precision of seamless special-shaped steel pipe is low: uneven wall thickness, low external brightness, high fixed-scale cost, and internal and external appearance. There are also pockmarks and black spots which are not easy to remove. Thirdly, its detection and shaping must be off-line processed. Therefore, it embodies its superiority in high pressure, high strength and mechanical structure materials. 1.热轧(挤压无缝异型钢管):圆管坯→加热→穿孔→三辊斜轧、连轧或挤压→脱管→定径(或减径)→冷却→矫直→水压试验(或探伤)→标记→入库

1. Hot-rolled (extruded seamless profiled steel pipe): round billet heating piercing three-roll skew rolling, continuous rolling or extrusion stripping sizing (or reducing diameter) cooling straightening water pressure test (or flaw detection) marking storage

轧制无缝异型钢管的原料是圆管坯,圆管胚要经过切割机的切割加工成长度约为1米的坯料,并经传送带送到熔炉内加热。钢坯被送入熔炉内加热,温度大约为1200摄氏度。燃料为氢气或乙炔。炉内温度控制是关键性的问题.圆管坯出炉后要经过压力穿孔机进行穿空。一般较常见的穿孔机是锥形辊穿孔机,这种穿孔机生产效率高,产品质量好,穿孔扩径量大,可穿多种钢种。穿孔后,圆管坯就先后被三辊斜轧、连轧或挤压。挤压后要脱管定径。定径机通过锥形钻头高速旋转入钢胚打孔,形成钢管。无缝异型钢管内径由定径机钻头的外径长度来确定。钢管经定径后,进入冷却塔中,通过喷水冷却,钢管经冷却后,就要被矫直。

The raw material for rolling seamless special-shaped steel pipe is round tube billet. The tube embryo is cut by a cutting machine to produce billet with a growth of about 1 metre, which is heated by conveyor belt in the furnace. The billet is fed into the furnace and heated at about 1200 degrees Celsius. Fuel is hydrogen or acetylene. Temperature control in furnace is a key problem. After discharging the round billet, it must pass through the pressure perforator. The common piercing machine is conical roll piercing machine. This kind of piercing machine has high production efficiency, good product quality, large piercing diameter enlargement, and can pierce many kinds of steel. After piercing, the round billet is rolled, rolled or extruded by three rolls. After extrusion, the tube should be taken off and calibrated. The sizing machine rotates into the steel embryo to drill holes at high speed through the conical drill bit to form the steel pipe. The inner diameter of seamless special-shaped steel pipe is determined by the outer diameter length of the drill bit of the sizing machine. After sizing, the steel pipe enters the cooling tower and is cooled by spraying water. After cooling, the steel pipe will be straightened.

2.冷拔(轧)无缝异型钢管:圆管坯→加热→穿孔→打头→退火→酸洗→涂油(镀铜)→多道次冷拔(冷轧)→坯管→热处理→矫直→水压试验(探伤)→标记→入库。

2. Cold drawn (rolled) seamless profiled steel pipe: round billet heating piercing beating annealing pickling oil coating (copper plating) multi-pass cold drawn (cold rolling) billet tube heat treatment straightening water pressure test marking storage.


冷拔(轧)无缝异型钢管的轧制方法较热轧(挤压无缝异型钢管)复杂。它们的生产工艺流程前三步基本相同。不同之处从第四个步骤开始,圆管坯经打空后,要打头,退火。退火后要用专门的酸性液体进行酸洗。酸洗后,涂油。然后紧接着是经过多道次冷拔(冷轧)再坯管,专门的热处理。热处理后,就要被矫直。钢管经矫直后由传送带送至金属探伤机(或水压实验)进行内部探伤。若钢管内部有裂纹,气泡等问题,将被探测出。钢管质检后还要通过严格的手工挑选。钢管质检后,用油漆喷上编号、规格、生产批号等。并由吊车吊入仓库中。

The rolling method of cold-drawn (rolled) seamless profiled steel pipe is more complicated than that of hot-rolled (extruded) seamless profiled steel pipe. The first three steps of their production process are basically the same. The difference is that starting from the fourth step, after the round billet is emptied, it should be first annealed. After annealing, special acid liquids are used for pickling. After pickling, apply oil. Then followed by a number of cold-drawn (cold-rolled) billet tube, special heat treatment. After heat treatment, it will be straightened out. After straightening, the steel pipe is sent to metal flaw detector (or hydraulic test) by conveyor belt for internal flaw detection. If there are cracks and bubbles in the steel pipe, they will be detected. After the quality inspection of steel pipes, strict manual selection is required. After quality inspection of steel pipes, paint is sprayed with numbers, specifications, production batches, etc. The crane is hoisted into the warehouse.

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