JB/T 6395-1992 Large gears and ring gear forgings

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
Metal Brinell hardness test method
Metal Charpy (V-notch) impact test method GB 2106
JB/ZQ 4000.7
Forgings General technical requirementswww.bzxz.net
JB/T6397 large carbon structural steel forgings
3 ordering requirements
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
35trMo
42C1Mo
34Cr2Ni2Mo||tt| |34CrNi3Mo
37SiMn2MoV
0.32~| |tt||0.40
0. 17~|| tt||0.37
0.40~-| |tt||0.70
0.80||tt ||1.60~
0.035||tt| | 0.035 | 0.035
1.10||tt ||Ni
09. 15 ~-
1993-07-01 Implementation
Steel||tt ||No.
12CrNi3
40CrMnMo
16Mncr
20CrMnTi
20CrMnMo
15Cr2Ni3Mo
17C12Ni2Me
20CrNi2Mo
0.19||tt ||0.17-
0.14~| |tt||0.19
0.17~|| tt||0.37
JIB/T 6395-- 92
Continued Table 1
0.60||tt| |0.40-
0.035| |tt||0.035
1.40||tt| |1.40~
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
Forgings should be manufactured from killed steel ingots.
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
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
≤650
>650~
Surface
300 --
Surface
22 600~
Allowable composition, lower limit deviation
25 200-
10 300
Elements
Composition range
>90
>0.030~0.06
>0. 90~2.10
71. 00~2. 00
>2. 00~~5. 30
>0.20-0. 40
>0. 40~1.15
>0.10～0. 25
Mechanical properties
JB/T6395--92
Continued Table 2
>650~
>1300~
private! cm
22 600~-
Tolerance of upper and lower limits of composition
23 200-
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
Normalizing
Tempering
Quenching and tempering
Quenching and tempering
Sectional size
《Diameter or thickness》
2100~250
>250~~500
>500~1 000
>16～40
210～100
>100-250
>250-500
>100～300
>300-~500
>500-~800
580-770
560-750
560~720
560~720
700~850
650-800
630--780
590--740
590~~740
Mechanical properties
MPalMPa
370| |tt||345
%||tt ||1430
Impact Power
AkuAkmy (Akv)
31| |tt||27
17||tt ||(540)
10||tt ||31
tempering
degree
Explain quenching
Nitriding
163~217
Description||tt| |General use
and surface braid
exertion teeth
207~~302
197-286
187~- 255
241-286
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
≥100～300
2300~ -500
500800
>100--160
1>160-~250
Tempering
>250- 500
1500~750
>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
100~300
>300~ ~500
>500~~800
≤200
>200-400
>400～600
>100 ~300
>300~500
>500800
Sample wool ring
Size 15
a||tt| |MPa
≥635
≥590
JB/T 6395---92
Continued Table 3| |tt||Qo.2
MPalMPa
( 390)
9001100
900-~950
750～900
690-84)
590--740
650| |tt||550
000-1 200/800
900~~1100 1700
800 ~950
740~890
690~840
860|| tt||815
1080||tt ||1080
15|| tt||15
30||tt| |50
Impact power
ARUKAKWmI(Akv)||tt| |47
144055
(735)||tt| |(685)
(685)14
(590>14
(735)12
12||tt| |(490)12
[（835
131| |tt||40
39||tt ||42
35| |tt||35
HRC||tt ||207～269
269--341
262321
241~302
241~302
269-302
241-286
241-~ 269. |tt||62
天生头
火和中硬
轮、?圈
用000. 500mm ||电视
低速重
软开作、
可代用
34CrNiMo
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
热电视
萍火+
回火两
20CrMnMo
次萍火
+回火
一呤火
12CrNi3
+ low temperature
15Cr2Ni3Mo
17Cr2Ni2Mo|| tt||20CrNi2Mo
+呴火
小发北京
（运动或北京》
试样毛坏
gamitsu15
试样毛坏
北京15
+回火
十呤火
十回火
+集火
十回火
1175| |tt||930
JB/T 6395-92
绝表3| |tt||oa.m
MPalMIa
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~
模数在
12下下
的开作，
?圈及双|| tt||红自火用
「薜籽
62||tt ||模数在
12下载
的开作、
高开动
双袁呤火| |tt||57
用开合
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
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.
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