Some standard content:
Machinery Industry Standard of the People's Republic of China
Alloy Tool Steel for Large Forgings
1 Subject Content and Scope of Application
This standard specifies the ordering, manufacturing and acceptance technology of alloy tool steel for large forgings condition. This standard is applicable to general-purpose alloy tool steel for large forgings. 2 Reference Standards
Sample Sampling Method for Chemical Analysis of GB222 Steel and Allowable Deviations in Chemical Composition of Finished Products GB223 Chemical Analysis Method of Steel and Alloys
Measurement Method for Decarburized Layer Depth of GB224 Steel||tt| |GB2264
Acid etching test method for low magnification structure and defects of steel GB230
GB231
GB1299
Metal Rockwell hardness test method
Metal Brinell Hardness test method
Technical conditions for alloy tool steel
GB 1814
Steel fracture inspection method
YB28 metal microstructure inspection method
JB/ZQ4000. 7 | | tt | 3.2 The purchaser should provide ordering drawings and related finishing drawings that have been jointly approved by both parties. JB/T 6393.-92
3.3 When the buyer puts forward special requirements (Appendices A, B, C) or other supplementary requirements, they should be agreed upon by both parties. 4Manufacturing
4.1 Smelting
Alloy tool steel should be smelted by electric furnace or other methods. 4.2 Forging
4.2.1 The bone opening and water opening of each steel ingot should be sufficiently removed to ensure that there are no shrinkage holes and serious segregation inside the forging. 4.2.2 Forgings should be fully forged.
4.3 Heat treatment
Forgings should be delivered in an annealed state.
5 Technical requirements
5.1 Steel grade and chemical composition
5.1.1 The grade and chemical composition (smelting analysis) of alloy tool steel should comply with the provisions of the table. The Ministry of Mechanical and Electronics Industry of the People's Republic of China approved 260
1993-07-01 on 1992-07-01 to implement
brand
also
9Cr2
9CrSi| |tt||BCr3
4Crw2S
5CrW2Si
6CrW2Si
Cr12
Cr12Mov
9Mn2v
5CrMnMo||tt ||5CrNiMo
3Cr2W8V
3Cr2W8MoV
4Cr5MoSiV
4Cr5MoSiVi
4SiMnMoV
5CrSiMnMoV
6SiMnV
C
0.80~
0.95
0.85~
0.95
0.75~
0.85
Si||tt| |50.40
1.20 ~
1.60
0.40
0. 35-~ 1 0. 80-~
0.45
1.10| |tt||0.45~
10.50-
0.55
0.55~
0.65
2.00-
2.30
1.45~
1.70
0.85~
0.95
0.80
0.50~
0.80
≤0.40||tt ||0.40
00.40
0. 50~ j 0. 25~
0.60
0.50~
0.60
0.30~| |tt||0.40
0.60
≤0.40
≤0.40
10.17~
0.30-
0.40
0.33
0.43
0. 35 ~
0.45
0.42~-
0.50
0. 45-
0.55
0.55-
0.65
0.37
0.80 ~
1.20
0.80~
1.20||tt| |1 0.80-
1.10
0.80-
1.10
0.80-
1.10
Mn
0.40|| tt||0.30 ~
0.60
0.40
0.40
0.40
≤0.40
0.40
0.40|| tt||1.70-
2.00
1.20-
1.60
0.50~
0.80
M0.40
0.50~
0.70
0. 20
0.50
0.20~
0.50
1.50~
1.80|| tt||10.80~
1.10
0.90~
1.20
P
JB/T 6393—92
Table 1|| tt||0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030||tt| |0.030
0.030
Chemical composition
chemical
S
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030 1 0, 030||tt ||0.0300.030
0.030 1 0, 030
0.0301 0. 030
0.030
0.030
0.030
0.030|| tt||0.0301
0.030
学
Cr
成
1.30~
1.70
10.95~|| tt||1.25
3.20~
3.80
1.00~
1.30
1.00~
1.30
1.00~
1.30
11.50~
13.00
11.00-
12.50
0.60~
0.90
0.50~
0.80
2.20~
2.70
minutes
Ni
S0.25
0.25||tt ||0.25
$0.25
Mo
≤0. 25 ≤0. 20
40. 25 A0. 20
0. 25 -≤0 . 20
0.25
≤0.25
≤0.25
≤0. 25 1≤0. 25
≤0. 25 ≤0. 25| |tt||0.25
0.40~
0.60
0. 25 ~ ≤0. 25
0.25
1.40
1.80| |tt||0.15~
0.30
0.15~-
0.30
≤0.25≤0.25
2.20～
0.25
2.70
4.75～
5.50
4.75~
5.50
1.30~
1.60
0.0300.030
0.25
1≤0.25|| tt||.0.25
0.25
0.25~~
0.40
1.10~bzxZ.net
1.60
1. 10~
1.75
0.40~
0.60
0.25~
0.40
—A0. 25 —N0. 25
身亶北京分分安全可了应可以JB/7Q4000.7的设计。5.1.2
s0.20
≤0.20
2.00~||tt| |2.50
2.00~
2.50
2.20~
≤0. 20||h||2.70||h||0.20||h||0. 15 ～
0.30
0.10~
0.25
0.20
0.20
0.20~
0.50||tt| |7.50||h||9.00||h||0. 20-~ 1 7. 50~
0.50
10.30~
0.60
0.80~
1.20
0.20~||tt ||0.30
0.20~-
0.30
10.15~
0.30
9.00
%
Cu|| tt||0.30
.30
0.30
0.30
0.30
0.30
0.30
0.30||tt ||0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
261
5.2 hardness
JB/T 6393--92
5.2.1
身件的交货电影与开健应会表2 表行。表2
开健
钢
号
9Cr2
9CrSi
8Cr3||tt| |4CrW2Si
5CrW2Si
GCrW2Si
Cr12
Cr12MoV
9Mn2V
退火或high temperature回火HB
217207| |tt||241~179
255~207
217~179
255~207
285~229
269~217||tt ||255~~207
229
钢
号
5CrMnMo
5CrNiMo
3Cr2W8V
3Cr2W8MoV|| tt||4Cr5MoSiV
Cr3MoSiV1
ASiMnMoV
5CrSiMnMov
6SiMnV
5.2.2 当園方方法超质电影（呴火回火）时，身件图度应出供園二个电视商定。5.3 surface defects与设计
退火或高风回火HB
241~~179
241*--179
255-207.纳、结秀和夹杂。 When the surface of the forging has some local defects, it can be removed, the depth of the forging shall not be greater than 75% of the remaining amount of the processing, and the transition to the surrounding surface is 光滑。 5.4 shape size与公差
tt||shape size of the forging投稿论货图样可以。 6 test methods and inspection rules
6.1 潯件方法由供方方法。
6.2 identical炉、使用了作和电求热炉次的车件，潊方数语方法、新格表地和电影表性应电影表3这些。
tt
tt
tt||序銀号
北京数据
布氏开健
复试和击用热电视
歌话核校
GB223
GB231
取样足理
GB222
超件资料
Take the quantity
例图像图像样方法，图像热方法下载的下载的图像3次，回火图像不限。8 Qualified certificate
超件出厂时，以方应向需方所述金货各合中名记在线设计的剧情的设计。9 Printing、包装
9.1 Each forging is in the corresponding steel plate.电影时 使用于电视。262
JB/T 6393—92
附较A
呤火电影试样弻应值
(公司件）
当在方方法使用了官方中时间，试样图度双表A1方法者用。A1
A2洛氏水剧斯手GB230更多，试方应从能件冒口端切取：also available from 同炉批附带的试料上切取，每炉批取个个试样。
裴Al
钢
号
呴火试样弻应值
电
火
呴火
temperature
9Cr2
9Crsi
8Cr3
4Crw2Si
5CrW2Si| |tt||GCrW2Si
Crl2
Cr12MoV
9Mn2V
5CrMnMo
5CrNiMo
3Cr2W8V
3Cr2W8MoV||tt ||4Cr5MoSiV
ICr5MesiVt
4SiMnMov
5CrSiMnMoV
6SiMnv
B1 technology requirements
B1.1
820~ 850C油冷
820~~860℃油玲
1850-~880C油冷
860~900C油玲
860-~900 C油冷|| tt||860900油冷
1 950~1000℃油冷
950-1000℃油冷
780~-810C油冷
820~850C油冷
830~860C油冷
1075～１125油冷
1100～1150℃油冷
状
试样开好值HRC||tt ||62
62
55
353
55
57
260
58
262
53~~58
53--58
19~-52
52
790 preheat，1000C盐浴或1010℃油冷.550℃间火790℃ pre-heat1000<盐浴或1010℃油冷.550℃ tempering 900-~930℃ Xiang cold
870~900℃ oil cooling
820~860℃ oil cooling
Appendix B
Forging decarburization layer technology Requirements
(Supplement)
The unilateral decarburization layer (ferrite ten transition zone) of forgings should comply with the requirements of Table B1. Table 1
Decarburization layer requirements
Forging surface size Dmm
>5
Note: 7) in the table is the nominal size of the forged steel section. Group
0. 25+1. 5%D
B1.2 forgings--generally supplied in groups. After negotiation and agreement between the supply and demand parties, the goods can also be supplied in groups. B1.3 When the machining allowance can ensure the removal of the decarburized layer, inspection is not required. 260
60
40~~46
38-49
40-~46
0.20+2K
263||tt ||B2 Inspection Methods and Rules
B2.1 Decarburization layer inspection shall be carried out in accordance with GB224.
JB/T 6393--92
B2.2 The sample is cut from the sample part at the riser end of the forging, and two samples are cut from each batch. Appendix C
Low magnification, fracture and microstructure
(supplement)
C1 low magnification and fracture requirements
Fracture and pickling test of C1.1 steel There should be no shrinkage cavities, inclusions, delaminations, cracks, bubbles and white spots visible to the naked eye. C1.2 Center porosity and ingot segregation are evaluated according to the fourth level diagram of GB1299, and the acceptance level is mutually agreed upon by both parties. C2 microstructure
C2.1 Pearlite structure
C2.1.1 For 9CrSi and 9Cr2 steel delivered in annealed state, the pearlite structure should be inspected and evaluated according to the GB1299 level-level diagram. The acceptance level shall be determined The supply and demand parties shall mutually agree.
C2.1.2 Steel used for hot pressure processing does not inspect the pearlite structure. C2.2 Reticular carbides
C2.2.1 9CrSi steel delivered in the annealed state shall be inspected for reticular carbides and evaluated according to the second level diagram of GB1299. The acceptance level shall be mutually agreed upon by both parties.
C2.2.2 Steels used for hot pressure processing are not inspected for network carbides. C3 Eutectic Carbide Unevenness
Cr12.Cr12MoV steel delivered in the annealed state should be inspected for eutectic carbide unevenness, and its acceptance level shall be evaluated according to the third level diagram of GB1299 and shall be mutually agreed upon by both parties. C4 Relevant Provisions
When sampling forgings of the same heat number, same size and same heat treatment heat, the number of specimens, sampling locations and test methods shall comply with the provisions of the Taiwan Table.
Table C1
Test methods and sampling requirements
Serial number
2
3
5
Inspection items|| tt||Fracture
Low magnification
Pearlite structure
Network carbide
Eutectic carbide unevenness
Test method||tt ||GB1814
GB226
YB28
YB28
YB28
Note: The sample attached to each batch of forgings means that it is forged separately from the riser end. of test specimens. 264
Sampling requirements
Attached sample is equivalent to
Steel ingot head jump
Attached sample
Attached sample
Attached Sample
Dare to sample the number of rats (pieces)
2
2
The recommended uses of alloy tool steel are shown in Table D1. JB/T 6393—92
Appendix D
Recommended uses of alloy tool steel
(reference parts)
Table D1
Brand||tt| |No.
9Cr2
9Crsi
8013
4CrW2Si
5CtW2Si
6CtW2i
Cr12
Crt2Mov
9Mn2v
5CrMnMe
5CrNiMo
3Cr2W8V
3CrW8MoV
4Cr5MoSiV1
4SiMnMoV|| tt | tt||Steel rolling mill, shearing machine blades, measuring tool cutting tools and cold stamping dies, hot work dies and shearing machine blades
Steel rolling mill, shearing machine blades and impact-resistant molds Steel rolling mill, shearing machine blades, impact-resistant Mold (with decarburization phenomenon. 6CW2Si cold shearing knife, trimming die, wire drawing die and cold work die cold shear blade, cold work die
Medium-sized hot forging dies and punches, etc.
Complex shapes Large forging hammer dies with heavy impact loads, high pressure extrusion dies, hot shear knives, etc.
Hot work dies
Small and medium-sized hot forging dies with a side length of 300-400mm
Large, special Large hot forging dies, hydraulic press forging dies with side length ≤.800mm, small hot forging dies
This standard is proposed and managed by the Deyang Large Casting and Forging Research Institute of the Ministry of Mechanical and Electronic Industry. The institute is responsible for drafting. The main drafter of this standard is Jiang Xinliang
400 has temper brittleness)
265
Cr12MoV steel should be inspected for eutectic carbide unevenness, and its acceptance level should be evaluated according to the third level chart of GB1299 and shall be mutually agreed upon by both parties. C4 Relevant Provisions
When sampling forgings of the same heat number, same size and same heat treatment heat, the number of specimens, sampling locations and test methods shall comply with the provisions of the Taiwan Table.
Table C1
Test methods and sampling requirements
Serial number
2
3
5
Inspection items|| tt||Fracture
Low magnification
Pearlite structure
Network carbide
Eutectic carbide unevenness
Test method||tt ||GB1814
GB226
YB28
YB28
YB28
Note: The sample attached to each batch of forgings means that it is forged separately from the riser end. of test specimens. 264
Sampling requirements
Attached sample is equivalent to
Steel ingot head jump
Attached sample
Attached sample
Attached Sample
Dare to sample the number of rats (pieces)
2
2
The recommended uses of alloy tool steel are shown in Table D1. JB/T 6393—92
Appendix D
Recommended uses of alloy tool steel
(reference parts)
Table D1
Brand||tt| |No.
9Cr2
9Crsi
8013
4CrW2Si
5CtW2Si
6CtW2i
Cr12
Crt2Mov
9Mn2v
5CrMnMe
5CrNiMo
3Cr2W8V
3CrW8MoV
4Cr5MoSiV1
4SiMnMoV|| tt | tt||Steel rolling mill, shearing machine blades, measuring tool cutting tools and cold stamping dies, hot work dies and shearing machine blades
Steel rolling mill, shearing machine blades and impact-resistant molds Steel rolling mill, shearing machine blades, impact-resistant Molds (with decarburization phenomenon. 6CW2Si cold shearing knives, trimming dies, wire drawing dies and cold work dies cold shear blades, cold work dies
medium-sized hot forging dies and punches, etc.
complex shapes Large forging hammer dies with heavy impact loads, high-pressure extrusion dies, hot shear knives, etc.
Hot work dies
Small and medium-sized hot forging dies with a side length of 300-400mm
Large, special Large hot forging dies, hydraulic press forging dies with side length ≤.800mm, small hot forging dies
This standard is proposed and managed by the Deyang Large Casting and Forging Research Institute of the Ministry of Mechanical and Electronic Industry. The institute is responsible for drafting. The main drafter of this standard is Jiang Xinliang
400 has temper brittleness)
265
Cr12MoV steel should be inspected for eutectic carbide unevenness, and its acceptance level should be evaluated according to the third level chart of GB1299 and shall be mutually agreed upon by both parties. C4 Relevant Provisions
When sampling forgings of the same heat number, same size and same heat treatment heat, the number of specimens, sampling locations and test methods shall comply with the provisions of the Taiwan Table.
Table C1
Test methods and sampling requirements
Serial number
2
3
5
Inspection items|| tt||Fracture
Low magnification
Pearlite structure
Network carbide
Eutectic carbide unevenness
Test method||tt ||GB1814
GB226
YB28
YB28
YB28
Note: The sample attached to each batch of forgings means that it is forged separately from the riser end. of test specimens. 264
Sampling requirements
Attached sample is equivalent to
Steel ingot head jump
Attached sample
Attached sample
Attached Sample
Dare to sample the number of rats (pieces)
2
2
The recommended uses of alloy tool steel are shown in Table D1. JB/T 6393—92
Appendix D
Recommended uses of alloy tool steel
(reference parts)
Table D1
Brand||tt| |No.
9Cr2
9Crsi
8013
4CrW2Si
5CtW2Si
6CtW2i
Cr12
Crt2Mov
9Mn2v
5CrMnMe
5CrNiMo
3Cr2W8V
3CrW8MoV
4Cr5MoSiV1
4SiMnMoV|| tt | tt||Steel rolling mill, shearing machine blades, measuring tool cutting tools and cold stamping dies, hot work dies and shearing machine blades
Steel rolling mill, shearing machine blades and impact-resistant molds Steel rolling mill, shearing machine blades, impact-resistant Mold (with decarburization phenomenon. 6CW2Si cold shearing knife, trimming die, wire drawing die and cold work die cold shear blade, cold work die
Medium-sized hot forging dies and punches, etc.
Complex shapes Large forging hammer dies with heavy impact loads, high pressure extrusion dies, hot shear knives, etc.
Hot work dies
Small and medium-sized hot forging dies with a side length of 300-400mm
Large, special Large hot forging dies, hydraulic press forging dies with side length ≤.800mm, small hot forging dies
This standard is proposed and managed by the Deyang Large Casting and Forging Research Institute of the Ministry of Mechanical and Electronic Industry. The institute is responsible for drafting. The main drafter of this standard is Jiang Xinliang
400 has temper brittleness)
265
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