|
发表于 2015-4-21 16:37:17
|
显示全部楼层
andyany 发表于 2015-4-15 13:09
1 U% F0 S3 p# o+ \我的理解是,固溶说的是高温保持,退火强调的变温速度。
) L. X, j' p; B2 s- M你这一段是你的观点吗?还是来自手册或标准?
5 m- ?) A. ^" o& x6 A' H, b4 v; l ...
0 {# L7 ^) a7 {固溶是有退火效果的,炉子里出来的钢丝组织均匀,韧性好而强度低,体现出来就是软且延伸性好。我一直认为所谓固溶还是退火,都是针对材料组织来讨论的,高温保持或者冷却速率等,只是一种达到目的的工艺。2 o7 I* c. J' @$ g2 O. v5 U1 Q+ \8 z
我的观点,来自该篇论文THE HEAT TREAT DOCTOR: Stainless Steels Part Two: Heat
* o# z& J; K; D1 g6 M9 i3 dTreatment Techniques4 p2 G/ b% S K) C
这篇文章的参照如下:
# V0 L; T6 I- W, o' k: P- ?1 gReferences:
- w, d1 G) Y3 W# D5 t- s* O5 X) V! l, X9 T1. Stainless Steel Handbook, Allegheny Ludlum Steel Corporation
' d$ v+ i5 ?/ i8 E! I1 E2. The A-Z of Materials, www.azom.com.
" ?- O# s3 o6 L! T: T4 q1 O7 D' H3. ASM Handbook, Vol. 4: Heat Treating, ASM International, 1991.
. N8 R! m# c: ?7 X" ~4. Chandler, Harry editor, Heat Treater’s Guide, 2nd Edition, ASM International, 1995.
7 J6 e4 s$ r, |, K$ H
( S+ J: ?7 W+ ^6 l9 s( Z以下是论文中对于退火的具体阐述部分。
- R: n2 m) \8 ^+ |' [Annealing6 Y( n, S2 `( |, \' w& o
A number of different annealing methods (full, isothermal, subcritical) are commonly
1 g5 {9 o2 f6 `0 J G9 V" a2 }used for stainless steel. Austenitic stainless steels cannot be hardened by heat1 j: {$ @( l" v" j
treatment, but they do harden by cold working. Annealing not only allows' Q( E9 Y7 f1 o- a: [6 l
recrystallization of the work hardened grains but also places chromium carbides8 T) w. z8 F! c
(precipitated at grain boundaries) back into solution. Annealing can also be used for* L: M& y3 s# ?/ v; |$ f- q/ a8 _
homogenization of castings or welds, and to relieve stresses from cold working.7 b2 f" g/ n: d& E! R$ \& g* Z
Annealing temperatures usually are above 1900°F (1040°C), although some stainless
; K7 [% i9 }3 }steel types may be annealed at closely controlled temperatures as low as 1850°F
( Y/ i; ^( m- N: p( ?(1010°C) when fine grain size is desired. Time at temperature is often kept short to
9 A' F6 i5 ]9 X5 V! i' Q* R7 tminimize surface oxidation and to control grain growth, which may lead to a surface/ N/ K1 z4 c3 C5 ? Q
phenomenon called "orange peel." |
|