JB/T 6396-1992 Large alloy structural steel forgings

This standard specifies the technical requirements for ordering, manufacturing and acceptance of alloy structural steel forgings. JB/T 6396-1992 Large alloy structural steel forgings JB/T6396-1992 Standard download and decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
Large Alloy Structural Steel Forgings
1 Subject Content and Scope of Application
This standard specifies the technical requirements for ordering, manufacturing and acceptance of alloy structural steel forgings. This standard applies to alloy structural steel forgings for general purposes. 2 Reference standards
Sample sampling method for chemical analysis of steel and allowable deviation of chemical composition of finished products GB222
GB223 Chemical analysis method for steel and Taijin
Metal tensile test method||tt| |GB228
GB 229
Metal Charpy (U-notch) impact test method GB231 Metal Brinell hardness test method
Metal Charpy (V-notch) impact test method GB 2106
JB/T6397 Large Carbon Structural Steel Forgings
3 Ordering Requirements
3.1 The buyer should specify the name, category, steel number, delivery status and supply of the forgings in the order contract quantity of goods. 3.2 The purchaser should provide ordering drawings and related finishing drawings. 3.3 When the buyer has additional requirements, they should be agreed upon by both parties. 4Manufacture
4.1 The method of steel making for forgings shall be decided by the supplier. JB/T6396-92
4.2 The nozzle and riser of each steel ingot should be sufficiently removed to ensure that the forgings have no shrinkage holes and severe segregation. 4.3 Forgings should be forged and formed on a forging press with sufficient capacity to ensure that the interior of the forgings is fully forged. 4.4 Heat treatment should be carried out according to the delivery status of forgings specified in the order contract. 5 Technical requirements
5.1 Chemical composition
5.1.1 The chemical composition of steel shall comply with the provisions of Table 1. 5.1.2 The residual element content in steel shall be as follows: Cr
≤0.30%
5.1.3 The allowable deviation of the analysis results of finished forgings should comply with the provisions of Table 2. 5.2 Mechanical properties
The mechanical properties of forgings should comply with the requirements in Table 3. 5.3 Appearance, dimensions and tolerances
Approved by the Ministry of Mechanical and Electronics Industry of the People's Republic of China on 1992-07-14 276
Implemented on 1993-07-07
JB/T6396—92||tt| |5.3.1 Forgings are not allowed to have cracks, folds, shrinkage holes and other defects that seriously affect the surface quality. 5.3.2 The dimensions and tolerances of forgings should comply with the provisions of the ordering drawing and ordering contract. Table 1
20CrMnMo
20CrMnri
16MnCr
20MnCr
15Cr2Ni2
17Cr2Ni2Mo
20SiMn
35SiMn
42SiMn
5oSiMn
20MnMo
35CrMo
18MnMoNb
42MnMov|| tt||20Cr2Ni4
31CrNi3Mo
40CrNiMoA
0.12~|| tt||0.17
0.40||tt ||0.16~
0.40| |tt||0. 37~
0.37||tt| |0. 17~
0. 17~|| tt||0.37
1.40||tt ||1.10~
0.40|| tt||0.60
0.80||tt ||0.50~-
0.035||tt ||0.035
成| |tt||0.035
0.035||tt ||Points
1.30|| tt||0.80~
0.035|| tt||0.035
Mo||tt| |0.20~
0.25|| tt||0.45~
号| |tt||40CrMnMa
18Cr2Ni4W
38CrMnAl
25CrMo
42CrMo
50CrMo||tt ||30Cr2Ni2Mo
34C12Ni2Mo
0.35~|| tt||0.42
0.38~|| tt||0.45bZxz.net
Si| |tt||0.17
JB/T6396—92
绝表1
化||tt| |Mn
0.50～|| tt||0.80
0.70||tt ||P
0.035| |tt||0.035
0.90||tt ||1.20
0.80.|| tt||1.10
1.80~| |tt||2.20
0.25|| tt||0.15~
注：16MnCr、20MnCr、15Cr2Ni2、17Cr2Ni2、25CrMo.42CrMo、50CrMo.30Ct2Ni2Mo.34Cr2Ni2Mo等钢种均j同是是电影SMS公司标准汉号。
横电影电影
结果最好最好
0. 26~ 0. 56
>0.030
0. 91 ~~ 2. 10||h||2.11 10.00||h||625||h||0.02||h||0.03||h||0. 02
>625 ~
>1 300
cm||tt ||>2 600-
添加电影值世界限的设计了值0.03
0.03| |tt||0.04
0.010||tt ||0.04
>5 200 -||tt| |10400
210400
0.09| |tt||0.08
element
V|| tt 0.21--0.40
0.16~0.50||0.51||0.10||0.11~0.25||0.03|| tt||0.05
0.05||tt| |0.05
JB/T 6396--92||tt| |绝表2
横感行结果
>625~
>1 300-
2600||tt ||>2 600
添加电影值下行限的充许内容值0.03
0.01| |tt||0.02
0.02| |tt||0.05
0.07| |tt||0). 12||h||0.01||h||0. 02
>5 200-
0.07| |tt||0.12
0.03| |tt||0.04
0.14||tt ||0.01
注：成品的横截机指指粉可件横截活件（不内定中心孔）最作横截活机； 。6 电影时间和电视
6.1全方戚分分成
6.1.1熔炉分识
6.1.1.1应在每炉（包）吃注时时时样分用，可以多炉合小大钢器应电影情重法电影的analysis results。 6.1.1.2 小注试样不是方通话时，使用钢器电影电影的所件试样。6.1.2成品方法
时，可对可以熔火炉号可出和或多炉合吃的锓静所心制的forging制造性感品方式性感品品，可对自自灶火炉号可出和或多炉合如的钢面所心心的图店手机的剧情主要讲述了分二分安头处的外很在于一个上上是样；for the 空心水件或圆环波件，在二分一发壁厚处是样；语样说说破断的力学动生语样。||tt ||6.1.3实心实体的电视的实施应按GB223的设计。 6.2力学结果的歌机
6.2. 实心别件的分在的公称的公称包装或thickness determined，When the length of several parts of the forging is the same but the diameter is different, the maximum diameter should be used.壁厚和合度事的大学的值。
6.2.2 test volume
6.2.2.1 可以维手机后卡件金属less than 2000kg的forging件，在熔火炉号、热热炉次、 section under the condition of size.可以金属上上或可以3000kg下载的身件，则279
JB/T6396--92
应在可以身件上取两组试样；两维试样相销180° 。 对龙米或筒体部件若和两端各取-组试样，应方互错开180°
6.2.2.2 单用能成名可热尺部件反分尺开的倍尺都件can be considered一个新件，其方法了分写6.2.2.1条条件。
6.2.2.3每组试样可以的一个方法和世界方法。 6.2.3 的方法使用
6.2.3.1应有关于加长长分，以可以试部分分分分分于设计1.电影公称 diameter或thickness。但经退火、正火或正火、回火的通火的电影的电影的图火的图火的图像可以可以可以可以公称的金制端的前作。6.2.3.2向电影试样的试线和语心试样可口可以可以进行之·可以：
a．实心试样的身件的试样在二分一话带头，对小小和长和三火的身件的评论的三分处的头角说自小角说自带点到中心的三分处.二心筒体可件的电影的可的在二分一壁厚处，wherein 生火、回火求件的设计二端端头的90mm or equivalent to 二分一个壁厚的分列（take a relatively small one size）。见图1b。c．圆盘部件试样应Take在外迈加大或发动(thickness)加long二分处，在头火、回火胶件试样应美外迈90mm或equivalent to 二分克加力的在线（take a relatively small one size).见图1c。d．环形胶件试样应Take在外迈加大或可以加电视二分一名处，份下火、回火麦件试样应离环天生90mm或equivalent to the height of 二分名处(器二小小一个可件).觅图1d。 6.2.3.3出切向或横向试样的力学动动应比表3电影值行表4电影分分数。6.2.4 图像正视
6.2.4.1 When only hardness is required for forgings, the surface hardness deviation of the same forging shall not exceed 40HB, and the relative hardness difference of the same batch of forgings shall not exceed 50HB. However, when tensile and impact are required at the same time, the hardness value shall not be used as the basis for acceptance. Such as long part
Transverse test piece
Longitudinal test piece
Annealed or normalized
Transverse test piece
Longitudinal test piece
Giant long part
Transverse test piece
Level test piece
Itchy tempered
a) Shaft or square, rectangular forgings
Steel||t t||20Cr
20CrMnMo
Heat treatment
One quenching
Quenching
Tempering
Carburizing + quenching
Tempering
Two quenching
+Tempering
Extension part
JB/T 6396-92
Extended part
b) Hollow cylinder forging
Tangential test specimen
) Disc forging
Extended part
Tangential test specimen
Extended part
d) Ring forging
Figure 1
Cross-sectional dimensions
15 (core)| |tt||30 (core)
Horizontal specimen
Longitudinal specimen
Extension part
Tangential specimen
Tangential specimen
Sampling position of various forgings
Table 3
Mechanical properties
%|| tt||10
i(Axv)
Hardness
Degree| |tt||HB
20CrMnTi
16MnCrl
20MnCrts
15Cr2Ni21
17Cr2Ni2Mo
20SiMn
35SiMn
A2SiMn
50S iMn
20MnMo
35CrMo
18MnMoNb
18MnMoNb
42CrMoV
Heat treatment
Carburizing + quenching
+tempering
Carburizing + quenching
+tempering
Carburizing Carbon + quenching
+tempering
Carbon + quenching
+tempering
Carburizing 1 quenching
+tempering
Normalizing: National fire
Quenching and tempering
Quenching and tempering
Quenching and tempering
Quenching and tempering
Zhi fire + tempering
Quenching and tempering
Quenching and tempering
Section size Inch
Specimen rough
Size15
31--63
601～900
901～1 200
101300
301-400
401500
101~200
201~·300
301~~500
101200
201~300
100--300||tt| |301～~500
101~300
301500
501~800
≥500
100300
301~500
501-800
100~300
301~500
501~800
JB/T 6396—92
Continued Table 3
780-1080
640--930
980~-1 270
7901080
8801 180
780~-1080
1080～1320
980~1 270
(245)| |tt||(510)
（390)
（461)||tt ||(441)
(275)
(440)
15|| tt||14
14||tt| |15
15||tt| |12
30|| tt||28
40||tt| |40
34| |tt||34
29|| tt||25
39||tt| |31
运化巡火
运化退火
要化退火
|196~-255
229~-286
217269
217-~255
190-~255
229-~286||tt ||217269
207 ～ 255
207269
207~~269
207~269
207-269
187229|| tt||137~-229
241-~286
229-269
217211
20Cr2Ni4|| tt||34CrNi3Mo
AOCINiMoA
18Cr2Ni1W
40CrMnMo
38CrMoAl
25CrMo||tt| |42CrMo
soCrMo
热电视
萍火·回火
深火+回火
设贴||tt| |调质
小时利生
试机毛坏
平台15
101:～300||tt ||301---500
81~100
101-151
151～250
81～ 100
101-~150
151~230
101~300
301～500
501~800|| tt||试样毛坏
北京30
101-~300
301～500
501~800
101~~300
17～40
41~100
101~160
101~160|| tt||161~250
251~~500
501~~750
101-~160
16]~250|| tt||251500
501-~~750
JB/T 6396-
绝表3
980| |tt||980
2785||tt ||735
780~930
690-830
640-~780
900-1100
800~~950
750~~900||tt| |690840
590--740
900~-1 100
800-~1 000
800-~950
740--890| |tt||690-~840
(ag）
(1080)
685||tt| |(835)
（835)
（835)
【 （835）
(835)
(490)|| tt||590
390||tt| |700
8|| tt||7
14||tt| |10
13|| tt||能
50||tt| |1.5
55|| tt||60
50||tt| |.
ARVM k
(Akv）
39| |tt||31
55||tt ||48
(35）
hardness
269-341
269| |tt||退火
241-286
241~~286
229--269| |tt||217-255
255~·286
241~286
运化退火
运化退火
248.调质
小话尽寸
101~160
161-250
251~~500||tt ||501～1000
101~160
161~~250
251~500
501~1,000
JB/T6396-92
表3（完）
Qu..||tt ||(a.)
1 100--1 300
1000~1200
900～1 100
830-980|| tt||780-930
1 000-~1200
900~-1 100
800-950
740~890
690-840
700|| tt||600
12||tt| 12.|与国际医合、export或新视频上的电视。表4
酸性电炉钢
力学言了
25| |tt||5
40||tt ||40||hr||40||hr||4.5
1 ~25t钢口身造身亶
30| |tt||40
40|| tt||45
50||tt| |45
( 45）
（45)
运化退火
248| |tt||运化退火
>25锛市身造身亶
10|| tt||10
for weight over 100kg的圆盘和圆环身亶，应在可以电影上上是，6.2.4.2
二分之
10||tt| |5
50|| tt||60
radius 夏 at least打两处
hardness，2处相可180°，for the weight more than 100kg的实心合件，应在外周 surface at least 打夏夏，上这个均律方法。
6.2.5 test method
6.2.5.1 新方正觉应按GB228的计算。6.2.5.2Act: 歌明正觉按GB229歌要，Akv按GB2106歌要，AkDVM按JB/ T6397 附美A 电影。 6.2.5.3 hardness testing method 按GB231 电视。 6.3 appearance、size与公差
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