The invention relates to the field of welding technology and provides a method of welding narrow gap with 0.8mm welding wire for the gap of I-groove with a welding width of 2-5mm, including the following methods: putting ceramic pad on one side of the corresponding groove of the welded piece; welding when preheating to 210-230 degrees Celsius; and holding the welded piece in the welding process Melting pole gas shielded arc welding was used with wire diameter of 0.8mm, and underwelding, filler welding and cover welding were carried out sequentially. The cooling rate of the weld was controlled from 230 to 500 / h, and the heat preservation was continued during the cooling process. When the temperature of the weld dropped to 210 to 230, the heat preservation was stopped and the whole cooling rate of the weld was controlled from 50 to 80 / h until the weld was finished. Cool to normal temperature. The welds welded by this method have no crack and high strength. A welding piece is welded by using the above 0.8mm welding wire to weld narrow gap. The weldment has no crack and high strength.
【技术实现步骤摘要】
一种0.8mm焊丝焊接窄间隙的方法及焊接件
本专利技术涉及焊接
领域,具体而言,涉及一种0.8mm焊丝焊接窄间隙的方法及焊接件。
技术介绍
焊接,也称作熔接、镕接,是一种以加热、高温或者高压的方式接合金属或其他热塑性材料如塑料的制造工艺及技术。焊接的范围涉及到太多领域,尤其在工业中占有重要地位,窄间隙焊接为待焊件焊缝宽度较小时的焊接方式,现有的窄间隙焊接技术由于焊接方法设置不合理容易导致裂纹出现。鉴于此,特提出本申请。
技术实现思路
本专利技术提供了一种0.8mm焊丝焊接窄间隙的方法,旨在改善现有的窄间隙焊接技术焊接得到的焊件易出现裂纹问题。本专利技术还提供了一种焊接件,该焊接件无裂纹,强度高。本专利技术是这样实现的:一种0.8mm焊丝焊接窄间隙的方法,用于焊接宽度为2~5mm的I形坡口间隙,包括如下方步骤:在待焊件对应坡口处的一面垫上陶瓷衬垫;对待焊件预热至210~230℃;当待焊件温度达到210~230℃时进行焊接,在焊接过程中对待焊件进行保温,使得待焊件保持在210~230℃,采用熔化极气体保护电弧焊,焊丝直径为0.8mm,依次进行打底焊、填充焊和盖面焊; ...
【技术保护点】
1.一种0.8mm焊丝焊接窄间隙的方法,其特征在于,用于焊接宽度为2~5mm的I形坡口间隙,包括如下步骤:在待焊件对应坡口处的一面垫上陶瓷衬垫;对待焊件预热至210~230℃;当待焊件温度达到210~230℃时进行焊接,在焊接过程中对待焊件进行保温,使得待焊件保持‑*在210~230℃,采用熔化极气体保护电弧焊,焊丝直径为0.8mm,依次进行打底焊、填充焊和盖面焊;焊接完成后降温,控制焊缝处的降温速率为230~500℃/h,在降温过程中仍旧对焊接件进行保温,保温温度为210~230℃;当焊缝处温度降至210~230℃时停止保温,控制焊件整体降温速率为50~80℃/h直至焊接件冷却至常温。
【技术特征摘要】
1.一种0.8mm焊丝焊接窄间隙的方法,其特征在于,用于焊接宽度为2~5mm的I形坡口间隙,包括如下步骤:在待焊件对应坡口处的一面垫上陶瓷衬垫;对待焊件预热至210~230℃;当待焊件温度达到210~230℃时进行焊接,在焊接过程中对待焊件进行保温,使得待焊件保持-*在210~230℃,采用熔化极气体保护电弧焊,焊丝直径为0.8mm,依次进行打底焊、填充焊和盖面焊;焊接完成后降温,控制焊缝处的降温速率为230~500℃/h,在降温过程中仍旧对焊接件进行保温,保温温度为210~230℃;当焊缝处温度降至210~230℃时停止保温,控制焊件整体降温速率为50~80℃/h直至焊接件冷却至常温。2.根据权利要求1所述的0.8mm焊丝焊接窄间隙的方法,其特征在于,进行打底焊时焊接电流为115~135A,电压为25~30V。3.根据权利要求1所述的0.8mm焊丝焊接窄间隙的方法,其特征在于,进行填充焊和盖面焊过程时,焊接电流为310~330A,电弧电压为35~37V。...
【专利技术属性】
技术研发人员:蔡建利,王杜槟,林永刚,陈启超,游义才,李伟,龙太海,汤春林,周文明,
申请(专利权)人:四川汇源钢建装配建筑有限公司,
类型:发明
国别省市:四川,51
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