推进器的修复：
Propeller's repair:
1、把推进器端部需堆焊部位预热，温度达到350℃左右。
1st, needs the built-up welding spot thepropeller nose preheating, the temperature achieves 350℃ about.
2、选用特种焊条直流焊机，调整电流在150A左右。
2nd, selects the special welding rodcocurrent welding machine, the adjustment electric current about 150A.
3、根据推进器端部前角磨损情况分层堆焊，每堆焊一层，必须清除焊渣，再焊第二层，焊接厚度超过所需厚度1-2mm，焊好的推进器不应有夹渣，气孔等缺陷。
3rd, the basis propeller nose front rake attritionsituation lamination built-up welding, each built-up welding, must eliminatewelds the dregs, welds second again, welding thickness surpasses needsthickness 1-2mm, welds the good propeller not to have the entrapped slag, flawsand so on blowhole.
4、堆焊后，把堆焊的部分插入干燥的生石灰或草木灰中，插入深度在三个导程以上进行冷却。
4th, after the built-up welding, in built-up weldingpart insertion dry quick-lime or plant ash, depth of penetration above threelead carries on cooling.
5、冷却到50℃以下时取出，在绿碳化硅砂轮上修磨，修磨时不允许用力过猛或局部过热，严禁用水或其它液体冷却。
5th, cools to 50℃ below when takes out,resharpens on the green silicon carbide grinding wheel, when sharpening doesnot allow to make an effort fierce or the local overheating, refuses the waterused or other liquid cooling.
6、修磨时，螺旋端部360°圆周处前角由2°，逐渐均匀地增加，到端部时前角增加到22°±1.5°，在此段前角角度上升过程中不得有坑洼不平或不均匀等现象。
6th, when sharpening, the spiral nose 360° roundeverywhere front rake by 2°, increases evenly gradually, to nose when the frontrake increases 22°±1.5°, do not have the pits and depressions in this sectionof front rake angle rise process uneven or non-uniform and so on phenomena.
7、
If the figure aboveshows, if the axle neck 105mm long circumference part attrition surpasses time6mm, according to the following craft repair.
①Craft which welds after front preheating, welds evenly in the 105mmlong outer annulus surface with the J422 carbon knot, surpasses the figureabove to show outer annulus size 1-2mm.
②Inserts dry or in the plant ash, cools to 50℃ belowcarries on the sharpening. The sharpening like figure above shows up to butactually the size, its circumference beat quantity is not bigger than 2mm, andthe circumference surface is not obvious convex-concave.
8、修磨好的推进器，严禁敲击或碰撞，以免损坏堆焊表面及其它部位，应小心存放，以备使用。
8th, resharpens the good propeller, refusesthe rap or the collision, in order to avoid the damage built-up welding surfaceand other spots, should deposit carefully, prepares the use.
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