原文：One of the most effective methods of increasing the rate of heat transfer in heatexchangersis using tubes with lengthwise corrugations (Fig.i).Among the differentmethodsknown here and abroadfor making such tubes (longitudinal and rotary rolling,welding,drawing,forging),cold drawing occupies an important position.This isbecause of the highproductivity of this method,the accuracy of the tube dimensions,the good surface finish,and the fact that the tool is relatively simple to fabricate.Atechnology has been developedand introduced at several nonferrous metallurgicalplants for drawing copper-alloy tubeswith lengthwise corrugations.The Pervouralsk New Tube Plant is developing a technology for drawing suchtubes madeof carbon steel.Trial lots of tubes with a corrugated outer surface havebeen made andstudies are being conducted to determine the optimum geometry of thedie.There are certain distinctive features of drawing stainless steel tubes that owe totheproperties of the material.The cold working of alloy steels--thus,stainless steels--ischaracterized by a high susceptibility to work hardening,low thermal conductivity,and thepresence of a hard and strong film on the surface which is passive to lubricants.The presenceof the film leads to seizing of the tube in the die.Existing lubricants andprelubricantcoatings do not provide a plasticized layer that will prevent the metalfrom adheringto the die and ensure a uniform strain distribution over the tube wallthickness.The Ural Polytechnic Institute and the Institute of Electrochemistry of the UralScienceCenter under the Academy of Science of the USSR have developed atechnology for applying acopper coating to the surface of tubes made ofcorrosion-resistant steels.The coating isapplied in the form of a melt containingcopper salts at 400-500~and allowed to stand forio min.The layer of copper 10-40-m thick formed on the surface by this operation is stronglybound to the base metalThe copper coating makes it possible to draw tubes of stainlesssteel on a mandrel.The sector metallurgical-equipment laboratory at the UralPolytechnic Institutestudiedthe process of drawing stainless steel tubes using the copper coating onshort(stationary)and long (movable)mandrels.The study showed that the metal doesnot adhere to the die,thecoating is strongly bound to the base metal,and largereductions can be made in one pass.These results suggested that stainless-steel tubeswith lengthwise corrugations could beproduced by cold drawing.Thus,the laboratory译文：其中一个最有效的办法来增加率换热器的传热利用管corrugations与纵向Fig.我)。在不同的方法吗知国内外发出这样的管（纵向和旋转的滚动，焊接，绘画，锻造），冷拔佔据著重要的地位。这是由于它的高生产力的这个方法，正确的管尺寸、良好的表面处理，而事实上，工具是比较简单的制造。一个技术已被发展出来并介绍了在几个有色冶金工厂画了铜铝管的用途corrugations与纵向。Pervouralsk管的新技术是开发一种植物画如此管碳钢。试验和大量的管外表面波纹，正在进行的研究确定最适几何学的死亡。有一定的鲜明的特点，图纸不锈钢管，欠了性能的材料。寒冷的工作—因此合金钢、不锈钢一具有很高的易感性的加工硬化、导热系数低、存在一个又硬又壮膜表面被动到合适的润滑剂。存在电影抓住管导致的死亡。润滑剂和prelubricant现有没有提供此涂料层上，这样可以有效的防止从秉承金属对模具，确保一个统一的应变分布在管壁厚度。该行业的实验室，metallurgical-equipment乌拉尔理工学院进行了研究绘画的过程中不锈钢管使用铜层在短（固定）长（移动）心轴。研究表明金属不坚持死涂料是强烈束缚在金属基体，大可以减少在一个通过。这些结果表明，不锈钢管与纵向corrugations有可能冷拔产生的。因此，实验室试验steell2KhI8NIOT准备很多波纹管。