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某产品的主部件是由一件板体和两件诱导齿焊接而成。板体和诱导齿都是锻造的20GrMaSiNi2高强度合金钢。该材料的碳当量为0.67％,根据经验:当C当量>0.6％时,淬硬倾向强,属于比较难焊的钢材,需要采用较高的预热温度和严格的工艺措施。图纸设计要求高强度合金钢20CrMnSiNi2应采用HT-6焊条。HT-6焊条是航空专用焊条,货源困难,价格昂贵,不适宜在大批量生产中使用。而且使用该焊条焊
The main part of a product is welded by a plate body and two induction teeth. Plates and induction teeth are forged 20GrMaSiNi2 high-strength alloy steel. The carbon equivalent of the material is 0.67%, according to experience: when C equivalent> 0.6%, the tendency of harden is strong, which belongs to the more difficult to weld the steel, the need to use a higher preheating temperature and strict process measures. Drawing design requirements High-strength alloy steel 20CrMnSiNi2 HT-6 electrode should be used. HT-6 welding electrodes are special aviation, supply difficulties, expensive, not suitable for use in mass production. And use the electrode welding