SECTION IV – REPAIR 修理（三）-B.Method No. 403B: Hard Chrome Plated Parts Repair

3. Repair and Application of Protective Coatings and Plating
防护涂料及电镀的修复与应用

B.Method No. 403B: Hard Chrome Plated Parts Repair

方法编号403B：硬铬镀件修复

NOTE: Hard chrome plating is used primarily on steel parts for the purpose of increasing abrasion resistance to reduce wear and friction between sliding surfaces. It is also used to recondition worn or over machined areas as a salvage repair.

注：硬铬镀层主要用于钢零件，目的是增加耐磨性，以减少滑动表面之间的磨损和摩擦。它也可用于翻新磨损或过度加工的区域，作为挽救性维修。

NOTE: Hard chrome plating is usually relatively thick, ranging from 0.002 to 0.010 inch (0.05 to 0.25 mm), and is applied directly to the base metal.

注：硬铬镀层通常相对较厚，厚度范围为0.002至0.010英寸(0.05至0.25毫米），直接施加在基底金属上。

Repair hard chrome plated parts as follows:

按如下步骤维修硬质镀铬零件：

WARNING: USE THE CORRECT PERSONAL PROTECTION. PROCEDURES THAT NEED GRIND/MACHINE WORK WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES.

警告：使用正确的个人防护设备。需要研磨/机械加工的程序会产生松散颗粒，可能进入眼睛。

(1) Machine surface to remove damage and all remaining plating. 100 percent clean up is required.

机械加工表面去除损坏和所有剩余的镀层。需要完全清理。

Make sure all Chrome Plate is removed from surfaces previously plated.

确保从先前镀层的表面上去除所有铬镀层。

NOTE: Make sure minimum stock material is removed. Do not machine more than the limits specified in applicable manual.

注：确保移除最低堆叠材料。请勿加工超过适用手册中规定的限制。

(2) Clean the part. Refer to SECTION II – CLEANING.

清洁零件。请参阅第II节-清洁。

(3) Perform magnetic particle or fluorescent penetration inspection. No cracks permitted. Refer to SECTION III-INSPECTION. Refer to applicable manual.

进行磁粉或荧光渗透检查。不允许存在裂纹。请参阅第III节-检查。请参阅适用手册。

(4) Clean surfaces to be plated. Refer to SECTION II – CLEANING.

待镀层表面的清洁。请参阅第II节-清洁。

NOTE: Make sure all remaining Chrome Plate is removed before new plating is applied.

注：在进行新镀层之前，确保所有剩余的铬镀层被清除。

(5) Mask all areas not to be chrome plated or used for electrical contact.

遮盖所有不需要镀铬或用于电气连接的区域。

NOTE: Masking materials used such as adhesive tape C01-0008, C01-0009, C01-0010; masking wax compound C01-0011, C01-0012; lacquer stop-off C01-0013, or various combinations of those materials must be used to mask the part surfaces. Satisfactory bond is required to prevent plating solution leaks into the masking and touch the part surface.

注：必须使用粘合胶带C01-0008、C01-0009、C01-0010等遮蔽材料，或遮蔽蜡化合物C01-0011、C01-0012，或漆膜阻隔剂C01-0013等材料，或这些材料的多种组合来遮蔽零件表面。必须确保良好的粘接以防止电镀液渗入遮蔽层并接触零件表面。

NOTE: When plating external surfaces, internal cavities such as inside diameters must be completely masked, or the end must be caped and sealed to prevent plating solution going into the shaft cavity.

注：当对外部表面进行电镀时，必须完全遮蔽内部空腔（如内径），或者必须对端部进行封盖和密封，以防止电镀溶液进入轴空腔。

(6) Set the part into the tank for plating.

将零件放入槽中进行电镀。

(a) Do not hit the part with the bus bars or tank walls. If it occurs, make sure the hit action did not break the masking. If masking is broken, remove part from plating process. Clean and remask the area where the masking material is damaged.

请勿用母线或罐壁撞击零件。如果发生这种情况，请确保撞击动作没有破坏遮蔽层。如果遮蔽层被破坏，则从电镀工艺中取出零件。清洁并重新遮蔽损坏的遮蔽材料区域。

WARNING: USE THE CORRECT PERSONAL PROTECTION. PROCEDURES THAT NEED GRIND/MACHINE WORK WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES.

警告：使用正确的个人防护设备。需要研磨/机械加工的程序会产生松散颗粒，可能进入眼睛。

(7) Apply hard chrome plating. Refer to AMS 2460, Class and Type as specified in applicable manual. Refer to applicable manual for necessary plating thickness.

施加硬铬镀层。请参考AMS 2460，适用手册中规定的等级和类型。请参考适用手册中的必要镀层厚度。

(8) Remove masking material.

移除遮蔽材料

(a) Remove all masking material.

移除所有遮蔽材料

(b) Clean part to remove remaining masking material. Refer to SECTION II – CLEANING.

清洁零件以去除剩余的遮蔽材料。请参阅第II节-清洁。

WARNING: USE THE CORRECT PERSONAL PROTECTION. HEATED PARTS WILL CAUSE BURNS.

警告：使用正确的个人防护装置。加热部件会造成灼伤。

(9) If required, heat treat part as specified in AMS 2460. Refer to applicable manual.

如需要，按照AMS 2460中的规定对零件进行热处理。请参阅适用手册。

WARNING: USE THE CORRECT PERSONAL PROTECTION. PROCEDURES THAT NEED GRIND/MACHINE WORK WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES.

警告：使用正确的个人防护设备。需要研磨/机械加工的程序会产生松散颗粒，可能进入眼睛。

(10) Machine surface to finish dimensions. Refer to applicable manual for repaired limits and surface finish.

机械加工表面光洁度尺寸。有关修复限度和表面光洁度，请参阅适用手册。

(11) Clean part. Refer to SECTION II – CLEANING.

清洁零件。请参阅第II节-清洁。

(12) Perform fluorescent penetration inspection. No cracks permitted. Refer to SECTION III – INSPECTION. Refer to applicable manual.

进行荧光渗透检查。不允许存在裂纹。请参阅第III节-检查。请参阅适用手册。

NOTE: Hard chrome plated surfaces often show a zone of hairline cracks. Those indications are typical of chrome plating and are not cause for rejection.

注：硬铬镀层表面通常会显示一条细线状裂纹。这些迹象是典型的铬镀层，因此不会导致拒收。

NOTE: Defective plating bonding to the base surface, indicated by chipping, flaking or separation is cause for rejection.

注：与基底表面的镀层粘合存在缺陷，表现为剥落、剥离或分离，应予以拒收。