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Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.容化焊接的主要特征焊接部位必须采取有效的隔离空气保护,使焊接部位不能和空气接触,以免造成焊道的成分和性能不良。保护方式有三种:气相,渣相,真空保护类型材料及设施适用范围气相保护气体CO2、TG、MG、MAG焊渣相保护焊剂手工焊条、埋弧焊剂、药芯焊丝..真空保护真空设备及设施航空航天或稀有金属Evaluationonly.ithAsposeslidesforNET4oclientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0ClientProfile171Copyright2019-2019AsposePtyLtdEvaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.钨极氩弧焊(TIG)定义:它是利用钨棒作为电极,以氩气、氦气等惰性气体为保护气体的种焊接方法。钨极氩弧焊构成示意图如下:电钨极填丝母材都缝利用钨极与工件之间产生的电弧作为热源。电弧和熔化金属都处于惰性气体的保护之中,使其不受周围空气的有害作用。Evaluationonly.ithAsposeslidesforNET4oclientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0ClientProfile171Copyright2019-2019AsposePtyLtdEvaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.它适合于焊接铝及其合金、不锈钢、高温合金、钛合金及难熔的活泼金属(如钼、铌、锆等)。用难熔金属作为电极,以氩气等惰性气体保护,焊接过程中电极不熔化。因此焊接过程稳定,焊缝成形好,容易得到高质量的焊缝。焊接过程可以用手工进行,也可以实现自动化。当工件厚度小于3mm时,可经不开坡口和填或不填加焊丝进行焊接。这种方法容易控制焊缝成形,因此,它多用来焊接薄件或厚件的打底焊,容易保证单面焊背面成形。但钨极氩弧焊电极使用电流有限,焊缝熔深浅,焊接速度低,一般情况下适合于焊接厚度小于6m工件。Evaluationonly.ithAsposeslidesforNET4oclientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0ClientProfile171Copyright2019-2019AsposePtyLtdEvaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.1.氩气具有极好的保护作用,本身既不与金属起化学作用,也不溶解于金属中,使得焊接过程的熔池冶金反应显得简单和容易控制,因此为获得高质量的焊缝提供了良好的条件。对于一般易氧化、氮化的活泼金属,高熔点的黑色金属以及异种金属都能进行焊接,应用面极广。2.氩气在焊接过程中仅仅只是单纯保护隔离作用,因此对焊件表面状态要求较高。工件焊前都要进行表面清理。把工件表面的油泥、锈班、灰尘等杂质清除掉。3.电弧在氩气中燃烧非常稳定,在小电流焊接情况下<10A)仍然稳定燃烧,而且填充焊丝是通过电弧间接加热,因而热输入容易调节,所以这种焊接方法适用于薄板及全位置焊接,也是实现单面焊双面成形的理想方法。Evaluationonly.ithAsposeslidesforNET4oclientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0ClientProfile171Copyright2019-2019AsposePtyLtdEvaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.4.由于填充焊丝不通过电流,所以不存在熔滴过渡问题焊接过程中没有飞溅现象产生,焊缝成形非常美观。5.钨棒承载电流能力较差,过大的电流会引起钨棒的熔化和蒸发,其微粒有可能进入熔池面引起夹钨。所以这种焊接方法焊接电流的大小会受到钨棒的限制,故熔敷速度较小,生产率较低。6.氩弧焊采用氩气纯度较高,通常都要求达到99.99%以上,且氩弧焊机又较复杂,因此氩弧焊生产成本较高。基于以上特点,氩弧焊可以焊接所有的金属。在航空、原子能、石油化工、电站锅炉、机械等领域被广泛应用。Evaluationonly.ithAsposeslidesforNET4oclientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0ClientProfile171Copyright2019-2019AsposePtyLtdEvaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET4.0ClientProfile17.1.Copyright2019-2019AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfo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