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发表于 2008-3-23 08:19:55
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来自： LAN
英國標准
$ n) X% ]( q" l6 D( REN39B Case hardening steel1 K7 E: j9 k9 M9 l; l1 w
C Si Mn Ni Cr Mo S P
& t" b2 _+ S. w(Ave. values %) 0.15 0.25 0.4 4.2 1.2 0.25 0.025 0.025$ E. ~2 D% f; _+ _
AS DIN BS$ D0 z5 h: @9 i! u
NEAREST2 N; l- L; q$ r/ U4 l+ v3 k" H
STANDARD X9315 1.6723 835 M 15
% q# E; l0 {7 B' w7 C9 Y: e8 G) e" d s5 F
DESCRIPTION - z) X) E1 A; C
4¼% Nickel Chromium Molybdenum case hardening steel for large and highly4 Y2 R( e5 I' G8 d, M; ^7 y4 q2 U& o
stressed applications.
, B# @" I: p/ r0 u# k
8 T5 k* m# |, sAPPLICATIONS9 A# d7 s. p' d7 q/ F* w
Components with large cross sections requiring very high toughness and core strength (1300 MPa) such as gears, gear shafts and heavy duty gear shafts in aircraft, truck construction and mechanical engineering.
; S7 Q- \; }7 X- K' ?. i% o9 l: r
MECHANICAL PROPERTIES Heat Treated Condition
; U, }2 C0 a5 K7 y- C" q$ MTensile Strength MPa 13105 t+ g! Q1 I6 v. Z. Q: Q9 @" O4 \
Elong.% 12
6 a4 D* i1 L1 H+ VIzod Impact J 33) X* ?, ^$ s+ R s$ b
Brinell Hardness Annealed 277max
* ~8 G/ ^: Y" F+ _
/ ?5 N3 W- C( e+ |6 r& C, v JHEAT TREATMENT
3 h4 L( h6 x; M9 J2 ^3 lForge 850-1050oC. Cool in furnace.
% N4 i6 Y% p4 E: w5 zNormalize 850-880oC. Air cool.
- q7 k+ F- V4 t4 b) x' Q3 yAnneal 650-700oC. Cool slowly in controlled furnace.
, O. w. n9 i3 B6 c$ i1 Q% iCarburize 880-930oC. Furnace or Air cool
& N# |0 H! J3 G$ p( ACore Refine 850-880oC. Oil quench or Air cool.5 f4 o! S( {5 J% Q% Z
Harden 760-780oC Oil quench.
) _; D/ e+ U9 m/ p- tTemper 180-200oC air cool0 h6 L! |6 r' p Q. j
/ j0 F& Q, Y) ^7 iWELDING 4 k+ c8 a0 y/ }. g% _$ V
Parts should be welded before Carburizing and Hardening. Preheat to 250-350oC.* B0 m1 \, e" N' p" w9 }+ ]
Filler metals:-Bohler FOX DCMS-KB or FOX 2.5 Ni electrodes. DCMS-IG wire. H: u( V, g2 J% c1 r: n- e
( l$ W! e( ~; [9 b$ X, D5 JSIZE RANGE
) u: A2 ]# Y8 S- XRound 42-142 mm |
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发表于 2008-3-22 22:55:26
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