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澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票通风管道焊接工艺要求有哪些?

发布人:http://olivierbernier.com   发布时间:2021-11-09 14:27:45

澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票过焊管采用镀锌钢和不锈钢两种材料钢带成型管通过焊接工艺,焊接口紧密,密封好,不能泄漏水,确保客户使用没有石油泄漏空气管,管的使用寿命超过10年,适用于高压排气除尘系统和废气处理系统,风管可制成2.44米3米6米8米(建议2.44-3米一段)。焊接风管广泛应用于工厂和工业生产。也称为焊管,焊管是由钢板或钢带压后形成固定长度6米的钢管,具有生产工艺简单、生产效率高、品种和规格,设备投资少,但其综合实力低于无缝钢管。

The over welded pipe is made of galvanized steel and stainless steel. The pipe is formed by steel strip. Through the welding process, the welded joint is tight, well sealed and can not leak water, so as to ensure that customers use the air pipe without oil leakage. The service life of the pipe is more than 10 years. It is suitable for high-pressure exhaust dust removal system and waste gas treatment system. The air pipe can be made into 2.44 m 3 M 6 M 8 m (a section of 2.44-3 m is recommended). Welded air ducts are widely used in factories and industrial production. Also known as welded pipe, welded pipe is a steel pipe with a fixed length of 6m formed by pressing steel plate or steel strip. It has simple production process, high production efficiency, variety and specification, and less equipment investment, but its comprehensive strength is lower than that of seamless steel pipe.

1.焊接前准备

1. Preparation before welding

(1)根据板厚形式,坡口加工采用机加工、等离子弧切割或碳弧刨削。使用碳弧气刨、坡口和手工电弧焊时,坡口两侧应涂上石灰粉,以免飞溅金属损坏。

澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票(1) According to the form of plate thickness, groove processing adopts machining, plasma arc cutting or carbon arc planing. When carbon arc gouging, groove and manual arc welding are used, lime powder shall be coated on both sides of the groove to avoid splashing metal damage.

(2)应采用v型坡口,焊接电流应小,以防止不锈钢的晶间腐蚀。

澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票(2) V-groove shall be adopted and the welding current shall be small to prevent intergranular corrosion of stainless steel.

(3)为了满足具有相同性能的接头,焊接材料的选择应遵循“成分相等”的原则。同时注意风管焊接接头中铁素体含量不宜过多,以提高接头抗热裂和晶间腐蚀的能力。

澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票(3) In order to meet the joint with the same performance, the selection of welding materials shall follow the principle of "equal composition". At the same time, it should be noted that the ferrite content of the welded joint of the air duct should not be too much, so as to improve the ability of the joint to resist hot crack and intergranular corrosion.

澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票(4)采用严格的定位焊接,遵循“短而厚”和“无焊透点焊”的原则。

澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票(4) Adopt strict tack welding and follow the principles of "short and thick" and "spot welding without penetration".

2.焊接技术要求

2. Welding technical requirements

(1)手工电弧焊采用直流反向连接,氩弧焊采用直流连接。

澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票(1) DC reverse connection is adopted for manual arc welding and DC connection is adopted for argon arc welding.

澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票(2)焊接风管前,用不锈钢丝刷掉焊丝表面的氧化皮,用丙酮清洗干净,然后烘干,准备使用。

(2) Before welding the air duct, brush off the oxide scale on the surface of the welding wire with stainless steel wire, clean it with acetone, and then dry it for use.

澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票(3)打底焊时,焊缝厚度应尽量薄,有利于与根部良好融合;熄弧时,应平缓倾斜,如熄弧停止收缩,抛光机抛光即可。起弧、熄弧必须在槽内进行,弧坑必须填满,防止弧坑开裂。

(3) During backing welding, the weld thickness shall be as thin as possible, which is conducive to good integration with the root; During arc extinguishing, it shall be inclined gently. If the arc extinguishing stops shrinking, it can be polished by the polishing machine. Arc starting and arc extinguishing must be carried out in the groove, and the arc pit must be filled to prevent arc pit cracking.

(4)为防止碳化物析出敏化和晶间腐蚀,应严格控制层间温度和焊后冷却速度,层间温度应控制在60℃以下。

澳门金牛版1877-澳门彩1877cc-1877彩票购彩大厅-1877.cc彩票(4) In order to prevent carbide precipitation sensitization and intergranular corrosion, the interlayer temperature and cooling rate after welding shall be strictly controlled, and the interlayer temperature shall be controlled below 60 ℃.

(5)焊接时尽量采用氩弧焊柄技术,可控制焊接层的表面颜色和形状,焊接效果理想。

(5) Argon arc welding handle technology shall be used as much as possible during welding, which can control the surface color and shape of the welding layer, and the welding effect is ideal.


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