1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 09 23 Revised Updated and renumbered 1999 11 18 Revised Revised para 1., 3.3, or per Ford Engineering drawing. These materials shall not interfere with subsequent paint or other protective systems. 3.5
2、PAINTABILITY Material supplied to these specifications must have prior approval for paintability by the responsible Materials Engineering activity. This approval shall be based on samples prepared to the local process and performance requirements appropriate to the country of vehicle manufacture. 3.
3、6 PAINT INTERACTION There shall be no visible interruption to the painted surface of the laminated steel caused by gas off of the polymer sandwich material during the normal bake cycles: 3.6.1 Electrocoat: 10 minutes at or above 182 C, maximum 205 C 3.6.2 Primer: 10 minutes at or above 149 C, maximu
4、m 177 C 3.6.3 Enamel: 10 minutes at or above 130 C, maximum 146 C Visible interruptions would include craters where there is complete separation of paint and the surface below is visible. It would also include ghosting or fuzziness in the surface gloss caused by interaction of materials. This test r
5、equires running panels with and without the polymer sandwich material and comparing the gloss levels (FLTM BI 106-01). The polymer sandwich material also must not produce by products in the bake cycle that would create any type of build up in the ovens that would generate dirt. ENGINEERING MATERIAL
6、SPECIFICATION WSE-M1A321-A1/A2 Page 4 of 5 Copyright 2002, Ford Global Technologies, Inc. 3.7 WELDABILITY The composite shall be capable of being safely welded to produce acceptable weld quality with minimal acoustic property degradation by shielded arc, resistance welding, MIG, or TIG welding. Weld
7、ing parameters are similar to those of standard solid metal substrates. When determining proper weld schedules, it is recommended that the composite be treated as individual metal skins, rather than homogeneous substrate when determining welding amperage and pressures. 4. GENERAL INFORMATION The inf
8、ormation below is provi ded for clarification and assistance in meeting the requirements of these specifications. 4.1 PANEL PREPARATION Cut or sheared test panels (300 x 300 mm) shall be taken from an as-received production coil. Care should be taken while removing test samples to ensure a scratch-f
9、ree surface. Prior to performing any adhesion or salt spray test, the surface should be washed with warm water and thoroughly dried to remove any water soluble drawing compounds. Prior to salt spray testing the edges of each panel shall be sealed with PVC tape, air drying paint and/or wax to prevent
10、 rust bleeding. As the sketch in Fig. 2 describes, take a metal-to-metal composite (150 x 25 mm) and cut one skin 63 mm from one end and then cut another skin 63 mm from the other end on the opposite side of the laminate leaving a 25 mm square lap sample. Use an Instron type tensile testing machine
11、and pull in the axial direction and record the pounds needed to cause failure. The maximum force (in Newtons) is divided by .0645 m2 (25 x 25 mm), because that is the contact area to give units in N/m2. Cross head speed is 1.25 mm/minute. ENGINEERING MATERIAL SPECIFICATION WSE-M1A321-A1/A2 Page 5 of 5 Copyright 2002, Ford Global Technologies, Inc. 4.2 PAINTABILITY Material supplied shall meet the requirements of WSS-M2P180-A.
