1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology. Standards WEAR RESISTANT ALLOYED GREY IRON CASTINGS EDS-M-1907 ISSUED DATE: 1994. 07. 12 REVISED DATE: 2003. 02. 28 VERSION: 3 EDS-M-1907WEAR RESISTANT ALLOYED GREY IRON CASTINGS PAGE: 1/2 ISSUED DATE: 1994. 07. 12 REVISED DAT
2、E: 2003. 02. 28 VERSION: 3 GM DAEWOO Auto & Technology 1. SCOPE This standard specifies wear resistant alloyed grey iron castings used by GM DAEWOO Auto & Technology Company(hereinafter referred to as the “GMDAT“). 2. TYPE AND USE Table 1. Type and Use Type Use Application FCW 260 Cam shaft FCW 270
3、Iron castings for structural purposes requiring wear resistance ( Including hardenability) Cam follower 3. Quality 3.1. Chemical composition Table 2. Chemical Composition Unit : WT% Type C Si Mn P S Cr Ni Mo FCW 260 3.103.45 (0.951.25) 2.152.45 0.600.90 0.20 max. 0.17 max. 0.851.20 0.200.40 0.400.60
4、FCW 270 3.003.25 (1.252.25) 2.102.40 0.700.90 0.20 max. 0.10 max. 0.901.10 0.400.70 0.400.70Remark : 1. Carbon contents within( ) indicate contents of combined carbon. 2. Compositions in Table 2.(including combined carbon) are the reference values and may be agreed upon between the parties concerned
5、. 3.2. Mechanical properties 3.2.1. Brinell hardness (HB, F=30D2) Values resulting from the test performed to the standard part or the part specified in the drawing with a ball of 5 shall satisfy the following values. FCW 260 : 262311 FCW 270 : 270380 3.2.2. Hardenability : When oil quenching at 850
6、, shall have the following surface hardness. FCW 260 : 48 HRC min. FCW 270 : 5664 HRC 3.3. Microstructure 3.3.1. Graphite shall be finely and uniformly distributed and matrix shall be made up of free carbide, pearlite and solbite structure. EDS-M-1907WEAR RESISTANT ALLOYED GREY IRON CASTINGS PAGE: 2
7、/2 ISSUED DATE: 1994. 07. 12 REVISED DATE: 2003. 02. 28 VERSION: 3 GM DAEWOO Auto & Technology 3.3.2. Carbides on the wearing surface shall be in one direction (longitudinal axis vertical to the surface.) 3.4. Appearance 3.4.1. Dimensions of castings shall satisfy the specification in the drawing. 3
8、.4.2. The surface of castings shall be free from molding and sand and such defects as crack, intrusion of casting sand and slag, blowhole, shrinkage hole that may cause harm during, machining and use. And it shall be machined well as not hardened. 4. NOTE Samples of materials released to this standa
9、rd shall be approved by GMDAT Technical center prior to commencement of delivery f bulk supplies. In the event of any intentional deviations from this standard, it is the sole responsibility of the supplier to inform the purchaser of all such deviations. Furthermore the supplier shall submit unsolic
10、ited samples for reapproval by GMDAT Technical center prior to commencement of bulk supplies. 5. TEST 5.1. All tests shall be performed at 235 5.2. Test standards EDS-T-7117 Method of Rockwell Hardness Test EDS-T-7118 Method of Brinell Hardness Test EDS-T-7133 Method of the Preparation for Microscop
11、ic Structure Test Piece EDS-T-7144 Method of Test Piece Preparation for Chemical Component Analysis 6. CROSS INDEX (REFERENCE) Table 3. Cross index EDS-M-1907 OPEL FCW 260 QS 120M00 FCW 270 QS 119M00 7. AUTOMOTIVE RESTRICTED HAZARDOUS SUBSTANCES Materials and components of parts must comply with EDS-A-0101.
