This article is focused on an analysis of factors negatively affecting the tube production process of tubes made from austenitic stainless steel with a very small diameter of 0.34 mm. The analysis was concentrated on factors that affect the drawing process stability of the seam tubes where the desired final dimensions—a diameter of 0.34 mm and a wall thickness of 0.057 mm—are limiting factors. Seam tubes made from steel 1.4306 and 1.4301, from producers KT and EW with a longitudinal weld line made by tungsten inert gas (TIG) welding, were used as blanks for constituent drawing operations. It is desirable to provide sufficient inert gas flow and cooling during the formation of a weld joint in a protective atmosphere chamber. A significant temperature gradient prevents the formation of undesirable Cr₂₃C₆ carbides in the heat-affected zone (HAZ) which negatively affects the plasticity and formability of the steel and is the cause of technological fractures.

中文翻译：

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小型接缝管拉拔工艺分析

本文着重分析对由直径为0.34毫米的奥氏体不锈钢制成的管的管生产过程产生不利影响的因素的分析。分析集中在影响接缝管拉伸过程稳定性的因素上，其中所需的最终尺寸（直径0.34毫米和壁厚0.057毫米）是限制因素。由生产商KT和EW生产的钢1.4306和1.4301制成的接缝管具有通过钨极惰性气体（TIG）焊接制成的纵向焊接线，被用作组件拉伸操作的毛坯。期望在保护气氛室中形成焊接接头期间提供足够的惰性气体流动和冷却。明显的温度梯度可防止形成不良的Cr ₂₃ C热影响区（HAZ）中有_6种碳化物，它们对钢的可塑性和可成形性产生负面影响，是造成技术破裂的原因。