This standard specifies the technical requirements for ordering, manufacturing and acceptance of large gears and ring gear forgings. This standard applies to large gears and ring gear forgings. JB/T 6395-1992 Large gears and ring gear forgings JB/T6395-1992 Standard download and decompression password: www.bzxz.net

Machinery Industry Standards of the People's Republic of China
Large gears and ring gear forgings
Subject content and scope of application
This standard specifies the technical requirements for ordering, manufacturing and acceptance of large gears and ring gear forgings . This standard applies to large gears and ring gear forgings. 2 Reference standards
GB223 Steel and alloy chemical analysis method
GB228 Metal tensile test method
GB229 Metal Charpy (U-notch) impact test method GB230 Metal Rockwell hardness test method
GB231
Metal Brinell hardness test method
Metal Charpy (V-notch) impact test method GB 2106
JB/ZQ 4000.7
Forgings General technical requirements
JB/T6397 large carbon structural steel forgings
3 ordering requirements
3.1
JB/T 6395-92
The buyer should Specify the name, steel type (see Table 1), supply quantity and delivery status of the forgings in the order contract. Table 1 Chemical composition
Steel
45
No.
40Ct
35trMo
42C1Mo
34Cr2Ni2Mo||tt| |34CrNi3Mo
37SiMn2MoV
C
0.42~
0.50
0.37~
0. 44
0.32~| |tt||0.40
0.38
0.45
0.30~-
0.38
0.30~
0.10
0.33 ~
0.39
Si
0.17~
0.37
0.17~
0.37
0. 17~|| tt||0.37
0.17~
0.37
0.17~
0.37
0.17~
0.37
0. 60~
0.90
Mn
1 0.50~
0.80
0.50~
0.80
0.40~-| |tt||0.70
0.50~
0.80
0.40~~
0. 70
0.50~
0.80||tt ||1.60~
1.90
P
0.035
0.035
0.035
0.035
0.035||tt| | 0.035 | 0.035
0.035
0.035
0.035
0.035
Cr
0.80~-
1.10
0.80-
1.10
0.90~
1.20
1.40-
1.70
0.70~
1.10||tt ||Ni
1.40--
1.70
2.75~
3.25
Mo
0. 15 -
0.25
09. 15 ~-
0.30
0.15--
0.30
0.25~~
0.40
0.40-
0.50
Ti
IV.0. 05
0.12
1993-07-01 Implementation
Steel||tt ||No.
12CrNi3
40CrMnMo
16Mncr
20CrMnTi
20CrMnMo
15Cr2Ni3Mo
17C12Ni2Me
20CrNi2Mo
C
0.1
0.17
0.37~
0. 45
0.14~
0.19||tt ||0.17-
0. 23
0. 17 ~
0. 23
0.13~
0.20
0.14~| |tt||0.19
0.17~
0.23
si
0.17~
0.37
0.17~
0.37
0.17~
0.37
0.17~
0.37
0. 17~
0.37
0.17~|| tt||0.37
0.17~
0.35
0.17-
0.35
JIB/T 6395-- 92
Continued Table 1
Mn
0.30
0.60
0. 90
1.20
1.00~
1.30
0.80~
1.10
10.90~
1.20
0.80
1.20
0.10-
0.60||tt| |0.40-
0.70
+
P
0.035
0.035
0.035
0.035
0.035
0.030
0.035
0.030
S
0.035
0.035
0.035
0.035| |tt||0.035
0.030
Q.035
0.030
Cr
0.60~
0.90
0.90
1.20
0.80~
1.10
1.1o~
1.30
1.10~
1.40||tt| |1.40~
1.80
1.50~
1.80
0. 40--.
0.65
Ni
2.75~~
3.15
2.80-..
3.20
1.40~
1.70
1.60
2.00| |tt|| Note: On the premise of ensuring process performance and mechanical properties, the residual element content of Cr, Ni, and Cu is not used as the basis for acceptance. 3.2 The purchaser should provide ordering drawings and related finishing drawings. 3.3 When the buyer puts forward special requirements, they should be mutually agreed upon by both parties. 4 Manufacturing
4.1
Forgings should be manufactured from killed steel ingots.
Mo
0.20
0.30
0.20
0.3)
0.40~
0.60
0.25 ~
0.33
0.15~
0.30
4.2 The riser and nozzle of each steel ingot should be cut off enough to ensure that there are no shrinkage holes and serious damage inside the forging. of segregation. 4.3 Forgings should be forged and formed on forging equipment of sufficient tonnage to ensure that the interior of the forgings is fully forged 4.4 Forgings shall be heat treated according to the delivery status specified in the order contract. 5 Technical requirements
5.1 Chemical composition
5.1.1 The chemical composition of steel shall conform to the provisions of Table 1. 5.1.2
Element
C
Si
The analysis deviation range of finished steel products shall comply with the provisions of Table 2 Table 2 Permissible deviation of chemical composition in finished product analysis Composition range
≥0.10～0.25
>0.25~0.55
0.35
>0.35
≤650
0.02
0.03
0.02
0.05
>650~
1300
0.03
0.04
0.03
0.06
Surface
300 --
2600
Surface
cm
22 600~
5200
Allowable composition, lower limit deviation
0.03
0.04
0.04
.06
0. 04
0. 05
0.04
0.07
25 200-
10300
0.05
0.06
0.05
11.07
ri
0. 04 -
0.1t
10 300
o.05
0.06
).G
.c8
271
Elements
Mn
s
Cr
Ni
Mo
Ti
Composition range
90
>90
≤0.050
≤0.030
>0.030~0.06
0.90
>0. 90~2.10
71. 00~2. 00
>2. 00~~5. 30
0.20
>0.20-0. 40
>0. 40~1.15
0.10
>0.10～0. 25
0.85
Mechanical properties
5.2
650
0.03
0.06
0.008
0.005
0.008
0.03
0.05
0.05
0.07
0.01
0.02
0.03
0. 01
0.02
0.05
JB/T6395--92
Continued Table 2
Cut
>650~
1300
0.04
0.06
0.008
0.005
0.010
0 .04
0.06
0.05
0.07
0.02
0.03
0.04
0.01
0.02
0.05
面
>1300~
2600
面
private! cm
22 600~-
5200
Tolerance of upper and lower limits of composition
0.05
0.07
o.oto
0.005
0.010
0.04
0.06
0.05
0.07
0.02
0.03
0.05
0.01
0.02www.bzxz.net
0. 05
0.06
0.08
0.010
0.005
0.010
0.05
0.07
0.05
0.07
0.02
0.03
0.06
0.01
0.02
0.05
23 200-
F0300
0.07
0.08
0.015
0.006
0.015
0.05
0.07
(.05
(.07
0.03
().04
0.07
0.01
0. 02
0. 05
-1033
0.08
.09
0.015
C.006
0.G15
0.06
0.08
0.05
0.07
0.03
0.04
0.08
0.01
0. 02
0.05
The mechanical properties of various forgings after quenching and tempering heat treatment shall comply with the provisions of Table 3. The number of forgings sampled and the test items shall be in accordance with the provisions of
JB/ZQ4000.7,
Table 3
Heat treatment
Steel grade
45
40Cr
272
Type
Normalizing
+
Tempering
Quenching and tempering
Quenching and tempering
Sectional size
《Diameter or thickness》
mm
100
2100~250
>250~~500
>500~1 000
S16
>16～40
210～100
>100-250
>250-500
100
>100～300
>300-~500
>500-~800
a
MPa
580-770
560-750
560~720
560~720
700~850
650-800
630--780
590--740
590~~740
735
685
2635
2590
Mechanical properties
do.a
(a.)
MPalMPa
305
275
275
275
500
430
370| |tt||345
345
%
17
15
15
15
%||tt ||1430
1635
17
Impact Power
AkuAkmy (Akv)
J
31
31| |tt||27
24
31
31
40
31
1835
17||tt ||(540)
(490)
(440)
(345)
15
14
10||tt ||31
4539
45
3.5
30
31
23
16
30
30
30
30
27
hard
tempering
HB
degree
Explain quenching
HRC
Nitriding
HV
163~217
360
Description||tt| |General use
and surface braid
exertion teeth
550
207~~302
197-286
187~- 255
241-286
61
241-~286: 45~
229-269
217-255
55| |tt||wheel, ring gear
surface quenching
exothermic teeth
wheel, ring gear
steel number
35CrMo
42CrMa
34Cr2Ni2Mo
34CrNi3Mo
37SiMn2MoV
40CrMnMo
16MnCr
20CrMnTi
Heat treatment
Type| |tt||Quenching and tempering
Section size
(diameter or thickness
rmm
$100
≥100～300
2300~ -500
500800
100
>100--160
1>160-~250
Tempering
>250- 500
1500~750
100
>100~~160
Conditioning
Conditioning
Conditioning||tt| |Quenching and tempering
Carburizing
+Braid fire
t Tempering
Carburizing
Pinghuo
Tempering||tt ||>160~~250
>250~~500
>500~-1 000
100
100~300
>300~ ~500
>500~~800
≤200
>200-400
>400～600
100
>100 ~300
>300~500
>500800
30
Sample wool ring
Size 15
a||tt| |MPa
2735
2685
≥635
≥590
JB/T 6395---92
Continued Table 3| |tt||Qo.2
()
MPalMPa
(540)
(490)
(440)
( 390)
9001100
900-~950
750～900
690-84)
590--740
650| |tt||550
500
1400
1390
000-1 200/800
900~~1100 1700
800 ~950
740~890
690~840
900
855
805
755
860|| tt||815
765
885
835
785
735
780~
1080||tt ||1080
1600
540
490]
(785)
%
%
15|| tt||15
15
12
12
15
45
35
30||tt| |50
50
13
14
15
16
50
11150
55
12
13
14
15
55
Impact power
ARUKAKWmI(Akv)||tt| |47
39
31
24
45
45
144055
(735)||tt| |(685)
14
38
1.47
35139
13
(640)
12
(685)14
(635)
14
(590>14
(735)12
(735)
12
(570)
12||tt| |(490)12
590
10
[（835
10
32
31
131| |tt||40
40
31
40
31
139
45
39||tt ||42
40
35
40
31
23
45155
40
10
38
38
50
50
41
41
34
35| |tt||35
35
硬
质
HB
度
表
HRC||tt ||207～269
40~
43
54--
60
52~
58
269--341
262321
241~302
241~302
269-302
241-286
241-~ 269. |tt||62
视题
天生头
火和中硬
?面?
轮、?圈
用000. 500mm ||电视
低速重
软开作、
可代用
34CrNiMo
钢
天物呤
火Gear、
麦圈用钢
红碒呪
火用斗预
模数在
12下下
的gear、
麦圈及双
红颜火用
朜看
273
钢号
热电视
安全
萍火
萍火+
回火两
20CrMnMo
次萍火
+回火
广火
一呤火
12CrNi3
+ low temperature
回火
广笑
15Cr2Ni3Mo
17Cr2Ni2Mo|| tt||20CrNi2Mo
+呴火
小发北京
（运动或北京》
mm
试样毛坏
gamitsu15
试样毛坏
北京15
25
+回火
双自
十呤火
十回火
双被
+集火
十回火
30
25
MPa
1175| |tt||930
1175
1080-
1320
980
JB/T 6395-92
绝表3| |tt||oa.m
(a）
MPalMIa
(885)
10
(685)
785| |tt||注：表和惨米头火件力学技术不可以成收电影。6 test method
6.1全用电话
6.1.1 熔界比话应在小注可以逐炉Take样通过。 11. 35. ||50~
62
设计
模数在
12下下
的开作，
?圈及双|| tt||红自火用
红被
「薜籽
236
袢第
55~
62||tt ||模数在
12下载
的开作、
?圈
双被
高开动
双袁呤火| |tt||57
52
小被
55~
62
用开合
软麦
轮
用
000mm
section
6.1.2 当園方方法成品手机时，可对可以熔界炉号可出的钢器或多炉（包）合吃钢面所量制的·个forging件标内成品analyse。 The test sample can be taken from the body of the forging or its extended part, for the round disk or solid heart forging, from the two-part radius to the outer diameter一种上take样；for 空心或圆环法件，在二分一发壁厚处take样，试样also can take自破断的力学性能试样。
6.1.3 chemical composition analysis method 合演GB223 stipulations 。6.2力学设计
6.2.1 试样可以、使用和番字
6.2.1.1 身向件试样应取自身件全制动加长段上，晨切向切有1个成试样和3个试样试样。切向试样的中心线usually is located near the surface of the forging piece.6.2.1.2 身圈试件的试样的试样和3个试样的试样，试向合Take自试件的语样免费，会晴切向在身件壁厚二分分偏切取。
6.2.2拉力步验明是按GB228手机。274
JB/T 6395—92
6.2 .3 歌词正视中，Aru按GB229正解；Ak按GB2106学报；AkDvM按JB/T6379中附護A学校。 6.2.4 图度正解
6.2.4.1当正解图像学体的端面、美外辈约四分下处at least 2处头，两处相和180°。如巢图于合合3000mm，图像外进约不同少于4处，两相相外90°6.2.4.2 6.2.4.3 When the forging only requires hardness, the hardness deviation of the same forging does not exceed 40HB, the relative difference in hardness of the same batch of forging does not exceed 50H13.电影电影、电影时，其图度全开值不可以下载方电影。6.2.4.4 hardness test according to GB231 regulation；头火试样的 hardness test according to GB230 regulation。7 verification、试和去用热电视
7.1 7.2
复试正视
If the 超件的力学性是设计不同，充许图形在原试样使用了名处取双8. Quality certification书、最作和包装
8.1 Quality certification书应可以：管货号、图号、名视、钢号、炉号、chemical composition、力学性体。8.2 Forgings should be marked as follows: order number, drawing number, heat number. 8.3 Finished forgings should be packaged to prevent corrosion and damage during transportation. Additional notes:
This standard is proposed and administered by the Deyang Large Casting and Forging Research Institute of the Ministry of Mechanical and Electronic Industry. This standard was drafted by the Deyang Large Casting and Forging Research Institute of the Ministry of Mechanical and Electronic Industry. The main drafter of this standard is Li Gengsheng.
275
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