DDDDDDDDDDDDDDDDDDDDDDDDDD 1DDDDDD (1) DDDDPD0.045%DSD0.050%D (2) DDDD P、SDD0.035%D (3) DDDDDDPD0.035%DSD0.030%D 2.DDDDDDDD (1) DDDD a. DDDDDD0.25%D ； b.DDDDDD0.25~0.D0%D ； c.高 DDDDD0.D0%D 。 (2) DDDD a.DDDDDDDDDDDDD5%) b.DDDDDDDDD DDDD 5~10%) c.DDDDDDDDDDDDD 10%)。 (3) DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD 于铁 3DDDDDDDDD (1) DDD 2) DDD ( 3) DDDD DDDD 4DDDDDDDD (1)DDDDD a.DDDDDDDD DDD) b.DDDDDDD) c.过 DDDDDDD DDD) d.DDDDDDDD DDD) (2)DDDDDD a. DDDDD b.DDDDD c.DDDDD d.奥氏DDD (3)DDDDDDDDDDD 5DDDDDD (1) DDDDDDDD a. DDDDDDDD b.DDDDDDD c.DDDD (2) DDD a.DDDDDDD (aDDDDDDD (bDDDDDDDDD DDDDDDDDDDDDDDDD (cDDDDDDD (dDDDDDDDDD DDDDDDDDDDDDD b.DDD c.DDD 3) DDDD a. DDDDDD b.DDDDDD c.DDDDDD 4) DDDDDD a.DDDDD b.DDDDDDDDDDDDDDDD c.DDDDDD d.DDDD e. DDDDD f.DDDD 5) DDDDDDDDDDDDDDDDDDDDDDDDDDDDDD DDDDD 6DDDDD (1)DDD a.DDDDDD Q195DD b) Q215Q AD B)D( c) Q235Q AD BD C)D( d) Q255D AD B)D( e) Q275D b.低DDDDD c.DDDDDDD DDD (2)DDDDDDDDDDD) a.DDDD ( a)优质DDDDDD (b)DDDDDD c)弹簧DD (d)易切 DD ( e)轴承DD (f)DDDDDDDDDD b.DDDD ( a)DDDDDD (b)DDDDDD c)DDDDDD c.DDDDDD (a)DDDDDD (b)耐DDD c)DDDDDD (d)D工 DDD ( e)DDDDDD a. DDD aDDDDDDD ( bDDDDDDD b. DDD aDDDDDDD ( bDDDDDDDD ( aDDDDDDD ( bDD DDDDD ( cDDDDDDD DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD DDDDDDDDDD DDDDDDDDDDDD DDD DDDDDDDDD DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD DDDDDD DDDDDDDDDDDDDDDDDDDD