原文：
齿轮泵的电弧喷涂工艺： 　 齿轮泵产业有非常大的发展潜力。齿轮泵的轴套内孔、轴套外圆、齿轮泵轴和泵壳的均匀磨损及划痕在0.02-0.20mm之间时，宜采用硬度高、与零件体结合力强、耐磨性好的电弧喷涂修理工艺。电弧喷涂的工艺过程：工作表面预处理→预热→喷涂粘结底层→喷涂工作层→冷却→涂层加工。 喷涂工艺流程中，要求工件无油污、无锈蚀，表面粗糙均匀，预热温度适当，底层结合均匀牢固，工作层光滑平整，材料颗粒熔融粘结可靠，耐磨性能及耐蚀性能良好。喷涂层质量好坏与工件表面处理方式及喷涂工艺有很大关系，因此，选择合适的表面处理方式和喷涂工艺是十分重要的。此外，在喷涂和喷涂过程中要用薄铁皮或铜皮将与被涂表面相邻的非喷涂部分捆扎。 涂层与基本的结合强度与基体清洁度和粗糙度有关。在喷涂前，对基本表面进行清洗、脱脂和表面粗糙化等预处理是喷涂工艺中一个重要工序。首先应对喷涂部分用汽油、丙酮进行除油处理，用锉刀、细砂纸、油石将疲劳层和氧化层除掉，使其露出金属本色。然后进行粗化处理，粗化处理能提供表面压应力，增大涂层与基体的结合面积和净化表面，减少涂层冷却时的应力，缓和涂层内部应力，所以有利于粘结力的增加。喷砂是最常用的粗化工艺，砂粒以锋利、坚硬为好，可选用石英砂、金刚砂等。粗糙后的新鲜表面极易被氧化或受环境污染，因此要及时喷涂，若放置　　超过4h则要重新粗化处理。 　 涂层与基体表面的温度差会使涂层产生收缩应力，引起涂层开裂和剥落。基体表面的预热可降低和防止上述不利影响。但预热温度不宜过高，以免引起基体表面氧化而影响涂层与基体表面的结合强度。预热温度一般为80-90℃，常用中性火焰完成。 在喷涂工作涂层之前预先喷涂一薄层金属为后续涂层提供一个清洁、粗糙的表面，从而提高涂层与基体间的结合强度和抗剪强度。粘接底层材料一般选用铬铁镍合金。 　　齿轮泵有非常大的发展空间。

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译文：
Gear pump Arc Spraying: Gear pumps have a very large industrial development potential. Gear pump sleeve bore, cylindrical sleeve, gear shaft and the pump casing of uniform wear and scratches in between 0.02-0.20mm, the appropriate use of high hardness, combined with the strong body parts, wear resistance arc spray repair process. Arc spraying process: the work of surface preparation Preheat → → → spray spray adhesive bottom layer of work → cooling → coating process. Spraying process, the required parts no oil, no rust, even rough surface, preheating temperature appropriate to the underlying combination of even and firm, smooth layer of work, material particles melt adhesive reliable, good wear resistance and corrosion resistance. Spray coating quality and the surface treatment and coating technology has a lot, so choose the right surface treatment and coating process is very important. In addition, use the process of spraying and coating thin metal or copper will be coated with the coating surface of the adjacent part of the non-binding. The bonding strength between coating and basic cleanliness and roughness with the substrate. Before the spraying, the basic surface cleaning, degreasing and surface roughness of such pretreatment is an important process of spraying. First of all, should spray some gasoline, acetone degreasing treatment, with a file, fine sandpaper, whetstone to remove the oxide layer and the fatigue, it exposed metal color. Then roughening treatment, surface roughening treatment to provide compressive stress, increasing the combination of coating and the substrate surface area and purification, cooling to reduce coating stress, stress relaxation within the coating, it is conducive to the increase in bond strength . Sandblasting is the most common coarsening process, sand with sharp, hard to be good, can be used quartz sand, emery, etc.. After the fresh surface roughness can easily be oxidized or affected by environmental pollution, and therefore timely spraying, if placed over 4h will have to re-roughening treatment. Surface coating and the substrate coating temperature difference would produce shrinkage stress, causing cracking and spalling of coatings. Preheating the substrate to reduce and prevent these adverse effects. But the preheating temperature should not be too high, so as not to cause oxidation of the substrate to affect the surface coating and the substrate bonding strength. Preheat temperature is generally 80-90 ℃, used to complete the neutral flame. Spray coating work in advance of spraying a thin layer of metal coating for the follow-up to provide a clean, rough surface, thereby enhancing the coating and the substrate bonding strength and shear strength. Chromium is generally used in the underlying material bonded iron-nickel alloy. Gear pumps have a very large room for development.