18-8ステンレス鋼の熔接に及ぼすパウダーカツトの影響
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概要
- 論文の詳細を見る
Powder-cutting method is currently in wide use with success for cutting stainless steel quickly. The use of this method, however, presents some difficulty with cutting and welding operation of 18-8 stainless steel where the heat affected zone within the temperature range of about 500 to 800℃. develops carbide precipitation which is liable to intergranular corrosion. On this account it become essential in manufacturing work to know the extent of influence exerted by heat on the power-cut stainless steel or whether additive heat effect would exist due to subsequent welding operation. Since the powder-cut edge has uneven surface and thick covering of oxide films, it also become necessary to determine to what extent the surface should be treated before welding. Research from which the results reported here were obtained was undertaken to get information in respect to the effect of heat in powder-cutting and welding on 18-8 stainless steel of 12 mm thickness and effect of surface treatment after cutting on its weldability. The followings summarize the results of the writer's tests and observations. (1) Heat-affected areas from powder-cutting is relatively very small as compared with that of welding. (2) When welding is done following the powder-cutting, the heat effect from the powder-cutting was not added to that produced by welding. (3) In }he case of manual arc welding and submerged arc welding, the surface tseatment after powdercutting will have almost negligible effect on mechanical properties of the welded joint. Consequently, light grinding or shotblasting of the surface after hammering slugs is all that is necessary before welding. (4) In the case of inert gas metal arc welding, tne slug at the joint will have considerable influence. In this case, the powder-cut surface should be cleaned with special attention, and preferably with machining.
- 社団法人溶接学会の論文
- 1958-02-25