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H型钢焊接时应该注意哪些?

来源:http://www.n-impact20.com

【 发布于:2019-04-19 15:40:39 】


焊接H型钢可采用Q235、Q295、Q345、Q390、Q420强度级别的钢材,其质量等级应依据构件特定的工作条件,恪守相关现行国度标准、规程的规则。钢材的牌号、化学成分及力学性能应分别契合GB/T700、GB/T714、GB/T1591、GB/T4172、YB4104中有关规则,并有质量证明书;当H型钢用于避免钢材层状撕裂而采用z向钢时,其钢材应契合GB/T5313的规则,并有质量证明书;制造焊接H型钢的钢板和钢带的技术请求应契合相应规范的规则,其外表质量应契合GB/T3274的规则。

Welding H-section steel can adopt strength grades of Q235, Q295, Q345, Q390 and Q420。 Its quality grade should be based on specific working conditions of components and abide by the relevant national standards and regulations。 The grades, chemical composition and mechanical properties of steels shall conform to the relevant rules of GB/T700, GB/T714, GB/T1591, GB/T4172 and YB4104 respectively, and shall have quality certificates; when H-beam is used to avoid layer tearing of steels and Z-direction steel is adopted, its steels shall conform to the rules of GB/T5313 and have quality certificates; the technical requirements for manufacturing H-beam steel plates and strips shall conform to the relevant regulations。 Then, its appearance quality should conform to the rules of GB/T3274。

焊接h型钢焊接留意事项:

Notices for Welding H-beam:

  1. 焊接H型钢当腹板厚度大于20mm时,宜设计为局部焊透或全焊透的对接与角接组合焊缝。

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大富彩票平台1。 When the web thickness of welded H-section steel is more than 20 mm, it should be designed as a combination of butt and fillet welds with partial penetration or full penetration。

2。焊接H型钢焊接之前要按JGJ81及其他相关规则停止焊接工艺评定。

2. Before welding H-section steel, the welding procedure shall be assessed according to JGJ81 and other relevant rules.

3.焊接H型钢可采用埋弧自动焊(船形焊接或贴角焊)、实芯焊丝或药芯焊丝二氧化碳气保焊、焊条电弧焊、药芯焊丝自维护焊、气维护自动立焊等焊接办法,腹板厚度不大于4.5mm时,可采用高频焊接办法,焊接应恪守有关技术规则。

3. Welding H-section steel can adopt submerged arc automatic welding (ship-shaped welding or fillet welding), solid or flux-cored carbon dioxide gas shielded welding, electrode arc welding, flux-cored wire self-maintenance welding, gas-maintained automatic vertical welding and other welding methods. When the web thickness is not more than 4.5mm, high-frequency welding method can be used. Welding should abide by the relevant technical rules.

4。焊接H型钢如用于吊车梁等重要构件时,其腹板与翼缘板衔接以及梁柱节点区的焊缝,应依据计算肯定。并恪守有关技术规则。

4. When welding H-section steel for crane girder and other important components, the connection between web and flange plate and the weld in beam-column joint area should be confirmed by calculation and abide by the relevant technical rules.

5.当合同图纸或技术条件对焊后消弭应力有请求时,须对焊接H型钢停止消弭应力处置。其加热和冷却速率以及保温时间等,应恪守有关技术规则。

5. When the contract drawings or technical conditions have a request for post-weld stress relief, the stress relief treatment of welded H-beam shall be stopped. Its heating and cooling rate and holding time should abide by the relevant technical rules.

6。制造焊接H型钢的焊工必需按JGJ81的有关规则考试合格并获得资历证书,其施焊范围不得超越资历证书的规则。

大富彩票平台6. Welders who manufacture welded H-section steel must pass the examination and obtain qualification certificate in accordance with the relevant rules of JGJ81, and their welding scope shall not exceed the rules of qualification certificate.

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