1、 KSKSKSKS KSKSKSK KSKSKS KSKSK KSKS KSK KS KS D 0048 () KS D 0048 :2009 2009 12 30 http:/www.kats.go.krKS D 0048:2009 : ( ) ( ) () POSCO () () () () () KIST () ( ) : (http:/www.standard.go.kr) ： ： 1988 11 17 ： 2009 12 30 2009-0988 ： ： ( 02-509-7274) (http:/www.kats.go.kr). 10 5 , . KS D 0048:2009 ()
2、 Glossary of terms used in iron and steel(testing) 1 , . . 2 . . ( ) . KS B 0812, KS D 0201, KS D 0210, KS M 1206, 3 () . a) 1) 2) , 3) 4) 5) 6) 7) 8) 9) 10) b) 1) 2) 3) KS D 0048:2009 2 c) 1) 2) 3) 4) d) 1) 2) 3) 4) 5) e) 4 , , . . 1 . 2 “ ” , . a) () 1000 , , , , , , , , , . mechanical test 1) ()
3、1100 , , , , , , ( 1190 ) tensile test 1111 ( 1191 ). test piece for tensile testKS D 0048:2009 3 () 1112 L 0 A A L K 0 A . K . ISO K5.65 . K4, 4.51, 5.65, 8, 9.03 ( 1152 ). proportional test piece 1113 KS 1 , 4, 5, 13 . non-proportional test piece 1114 L 0 ： P： R： 1 parallel portion 1115 ( 1 ) gaug
4、e mark 1116 1) 2 ( 1 ) 2) . , , . original gauge length, gauge length, extensometer gauge length 1117 , ( 1 ) grip, grip section 1118 , () ( 1 ) radius of fillet, radius of transition curve between grip and parallel portion 1119 , . . free length of test piecebetween grips KS D 0048:2009 4 () 1131 .
5、 . nominal stress 1132 , A , % , 100 1 Atrue stress 1133 1) . () . 2) (1135 ), (1172 ) . elongation, percentage elongation 1134 , , , L L 0 0 ln L L e (), 0 0 L L L eln(1) logarithmic strain, natural strain, true strain 1135 1) L L 0 , KS . (%) 100 0 0 L L L . 2) (1173 ) (1174 ) total elongation 113
6、6 , KS . permanent elongation, percentage permanentelongation 1137 - load-elongation diagram, load-extension diagram 1138 -, S-S stress-strain diagram, stress-strain curve 1151 () . KS . 1) ： 2) ： (%) 3) ： speed of testing rate of stressing, elastic stress rate, rate of straining elapsed time KS D 0
7、048:2009 5 () 1152 , . . Barba ：LabL 0 Oliver ： n L A k 0 L ： ： (%) L 0： A ： a, b, k, n： , Oliver , K A L 0 A L 0 K n K K conversion of elongation value 1161 (1162 ) (1163 ) . yield point, yield stress 1162 , , 2 upper yield point, upper yield stress 1163 , ( ) ( 2 ) lower yield point, lower yield s
8、tress 1164 . KS 0.2 % . KS . yield strength, proof stress KS D 0048:2009 6 () 1164 1) , % , ( ) , ( 3 ). 0.2 . 2) 15 , ( 3 ). 3) , , % ( 3 ). 0.5 . KS, % % . 0.5 % , 0.6 %, 0.7 % . a) b) c) 3 proof stress(non- proportional elongation), yield strength by offsetmethod proving test for permanent set st
9、ress proof stress(total elongation), yield strength by extension under load method 1165 maximum load 1166 . tensile strength 1167 ( ) yield ratio 1171 , , ( 2 ). yield elongation, percentage yield elongation KS D 0048:2009 7 () 1172 . elongation after fracture, percentage elongation after fracture 1
10、173 , , . uniform elongation 1174 , . ( ) . local elongation, necking elongation 1175 . KS . reduction of area, percentage reduction of area 1181 , n A e A Ce n n 515 %, 1020 % n . work hardening coefficient, n-value, tensile strain hardening exponent 1182 , r . . t t W W r 0 0 ln ln 0 0 0 ln ln W W
11、 W W r , W 0 , t 0 0 , , , W, t % , . , 15 %, 20 % . Lankford value, r-value, plastic strain ratio 1190 , , , , , tensile test at elevatedtemperature, high temperature tensile test 1191 , 10 mm , 6 mm 8 mm 12 mm . 5 ). 65 . 5 ( 0 A L . test piece for elevated temperature tensile test, test piece for
12、 high temperature tensile testKS D 0048:2009 8 2) , () 1200 , , . bend test 1201 bendability 1211 , , 4 () pressing bend method, roller bend method 1212 , , 5 () winding bend method 1213 V , V 6 V a . V-block bend method 1221 test piece for bend testKS D 0048:2009 9 () 1231 , . radius of inner surfa
13、ce, radius of mandrel, inside radius, radius of bend 1232 , 180 angle of bend, bending angle 1233 , 180 flat on itself, closely overlap, closely contact 1251 2 , . double bend test 1252 , , ( ) face bend test, bend test having the cladding in tension 1253 , , ( ) root bend test, bend test having the
14、 base metal in tension 1254 , side bend test 1260 , , . transverse test 1261 , . transverse test piece 3) () 1300 , , , , , , , . , . impact test 1301 40 mm , 1 , , , , Charpy impact test KS D 0048:2009 10 () 1302 , 22 mm 1 , Izod impact test KS 3 (2 mm U ), 4 (2 mm V ) 5 (5 mm U ) . ：mmc) 5 7 1311
15、, (1314 ) . ：mm 8 test piece for Charpy impact test b) 4 a) 3 KS D 0048:2009 11 () 1312 KS 2 V . ：mm b) 2 9 test piece for Izod impact test 1313 a 10 mm KS , 7.5 mm, 5 mm 2.5 mm . a , , , . ：mm 10 , , subsize test piece 1314 2 mm V . , . press-notched test piece 1321 , (J)kgfm KS 80 % . capacity of
16、impact testing machine a) 1 KS D 0048:2009 12 () 1322 . . angle of fall 1323 , angle of rise 1331 EWR(cos cos )L E ： W ： R ： (重 心) ： ： L ： , L . absorbed energy 1332 Charpy absorbed energy, Charpy impact strength 1333 (J/cm 2 ) kgfm/cm 2 Charpy impact value 1334 , 3 KS 2 . Izod impact value 1335 , .
17、 100 (%) A C B B ： A ： C ： percent brittle fracture, percent cleavage fracture, percent crystalline fracture 1336 , . 100 (%) A F S S ： A ： F ： percent ductile fracture, percent shear fracture, percent fibrous fractureKS D 0048:2009 13 () 1337 ( ) 11 lateral expansion 1361 , ( ) , ( ) transition temperature 1362 12 transition curve 1363 100 % , 100 % T rE ( 12 ). 100 % 1/2 . energy transition temperature 1364 , T rs 2 mm V 50 % T rs50 ( 12 ). fracture appearance transition temperatureKS D 0048:2009 14 () 1365 , 2 mm . lateral expansion trans
