Some standard content:
Machinery Industry Standard of the People's Republic of China
Large Heat-Resistant Steel Castings
Question Content and Scope of Application
This standard specifies the grade, ordering requirements and technical conditions of heat-resistant steel castings. JB/T 6403--92
This standard applies to heat-resistant steel castings for general engineering use cast in sand molds, excluding heat-resistant steel castings for special purposes. 2 Reference standards
GB222 Sample sampling method for chemical analysis of steel and allowable deviations of chemical composition of finished products GB223
Chemical analysis methods for steel and alloys
GB228
Metal tensile Test method
Casting surface
GB6060.1 Surface roughness comparison sample
GB6414 casting dimensional tolerance
3 Ordering requirements
3.1·The buyer should Specify the name, brand, delivery status and supply quantity of forgings in the order contract. 3.2 The buyer should provide ordering drawings that have been approved by both parties. 3.3 When the demander puts forward special requirements or other supplementary requirements, they should be agreed upon by both parties. 4 Manufacturing
4.1 Smelting
Steel for castings should be smelted by induction furnace, electric arc furnace, ladle refining furnace or other smelting methods that meet the requirements. 4.2 The casting and heat treatment processes are determined by the supplier. 5 Technical Conditions
5.1 Chemical Composition
The chemical composition of steel should comply with the provisions of Table 1. When the purchaser requires analysis of finished castings, the regulations in Appendix A (Supplementary Parts) shall be followed. The Ministry of Mechanical and Electronics Industry of the People's Republic of China approved 180
1993-07-01 on 1992-07-14 for implementation
brand
No.
(original brand name)||tt| |ZG40Cr9Si2
(ZG4Cr9Si2)
ZG30Cr18Mn12Si2N
(ZG3Cr18Mn12Si2N)
ZG35Cr24Ni7SiN
ZG20Cr26Ni5
(ZG3Cr25Ni5)
ZG30 Cr20Ni10
(ZG3Cr20Ni10)
ZG35Cr26Ni12
ZG35Cr28Ni16
ZG40Cr25Ni20
(ZG4Cr25Ni20)
ZG40C130Ni20
(ZG4Cr30Ni20)|| tt || ZG35Ni24Cr18Si2 | | tt | |( ZG3C25Ni20)
ZG20Cr20Mn9Ni2SiN
(ZG2Cr20Mn9Ni2Si2N)
ZG08Cr18Ni12Mo2Ti
(ZG0Cr18Ni12Mo2Ti)
C
0.35
0.50|| tt||0.26
0. 36
0.30
0.40
Si
2.00
JB/T 6403-92||tt ||Table 1
Chemical composition of heat-resistant cast steel
Mn
P
s
0.70
0.0350.030|| tt||3.00
1.60
2.40
1.30
~2. 00
11.0
~13.0
0.80
~1.50
0. 202. 00 1. 00
0. 20
0.40
0.20
0.50||tt| |0.20
5 0. 50
0.35
0.45
0. 20
~0.60
0.30
- 0.40
0.20
0.35
0.35
0. 55
0.35
～0.45
0.20||tt| |~0.35
0.18
0.28
≤2. 00 ≤2. 00
0.060
0.040
0.040||tt| |0.040
≤2. 00≤2. 00 — 0. 040
≤2. 00≤2. 00 0. 040
≤1.75 ≤1. 500. 040|| tt||0.040
0.030
0.040
0.040
0.040
0.040
0.040
≤2. 00 ≤ 2. 00 - 0. 040
10.040
1.50
~2.50
2.50
≤1. 50 0. 035 0. 030||tt ||2.00
2.00—
≤2.00
1.20
~2.00
2.00
1.80
~2.70| |tt||≤0. 08 ≤1.50
0.040
0.040
≤1. 00 0. 030
≤2.00
8.50||tt ||11.0
0.80
~2.00
0.040
0.030
0.045
0.040
Q.040|| tt||0.030
0.040
0.030
0.030
Cr
8.00
~10.0
17.0||tt ||20.0
23.0
～25.5
24.0
～28. 0
18.0
23.0
24.0| |tt||~28.0
26.0
30.0
23.0
27.0
28.0
~32.0
17.0| |tt||-20.0
13.0
17.0
24.0www.bzxz.net
~ 28.0
21.0
~24.0
24.0
r~28.0
17.0
21.0
16.0
~19.0
Ni
7.00
-~8.50
4.00
~6.00
8.0
12.0
11.0
~14.0
14.0||tt ||-18.0
19.0
～22.0
18.0
~22.0
23.0
26.0
33.0|| tt||37.0
33.0
~37.0
3.50
~5.00
18.0
~22. 0
2.0
3. 0
11.0
13.0
Mo
0.50
0.50
0.50
0.50
0.50
0.50
0.50
2.00
~ 3. 00
N
0.22
0.28
0.20
~0.28
0.23
~0.30
0. 20
0.28||tt ||%
Ti
0.30
~ 0. 70
181
5.2 Mechanical properties
JB/T6403—92|| tt||The mechanical properties of castings are generally not considered as acceptance items. . When required by the purchaser, single-cast test blocks can be used for sampling tests, and their values ??should comply with the requirements in Table 2.
Table 2
Brand
No.
(original brand number)
ZG40Cr9Si2
(ZG4Cr9Si2)
ZG30Cr18Mn12Si2N|| tt||(ZG3Cr18Mn12Si2N)
ZG35Cr24Ni7SiN
ZG20Cr26Ni5
(ZG3Cr25Ni5)
ZG30Cr20Ni10
(ZG3Cr20Ni10)
ZG35Cr26Ni12||tt| |ZG35Cr28Ni16
ZG40Cr25Ni20
(ZG4Cr25Ni20)
ZG40Cr30Ni20
(ZG4Cr30Ni20)
ZG35Ni24Cr18Si2
ZG30Ni35Cr15
(ZG3Ni3 5Cr15) | |tt | 2N)|| tt||ZG08Cr18Ni12Mo2Ti
(ZG0Cr18Ni12Mo2Ti)
ds
(..
MPa
(340)
(235)|| tt||235)
(235)
(235)
(245)
(195)
(195)
(235)
450
240
420
210
5.3 Appearance, dimensional deviation and surface roughness Mechanical properties of heat-resistant cast steel|| tt||h
MPa
550
490
540
590
490
490||tt| |490
440
450
390
440
440
730
510
790
490
%
8
12
23
8
8
8|| tt||8
5
13
10
48
40
30
Heat treatment status||tt ||950℃ annealing
1100～1150℃ oil cooling, water cooling or air
quenching and tempering
1 quenching and tempering
『quenching and tempering
1150℃ Chengping
5.3.1 Castings shall not have cracks, shrinkage, sand sticking, pores and other defects that affect processing, assembly and service life. 5.3.2 The dimensional tolerance of castings should comply with the regulations of GB6414. The dimensional deviation of installation cast holes (including semi-circular holes, square holes, notches, etc.) and the dimensional deviation of the distance between holes or between holes should comply with the provisions of Table 3 and Table 4. 182
Diameter or hole width
Limit deviation value
Basic size
Limit deviation value
JB/T6403
—92|| tt||Table 3 Cast hole (including semi-circular hole, square hole, notch) size deviation 30
+2
0
>30～60
+3| |tt||Table 4 Dimensional deviation of hole to hole or hole to edge distance 120
±1.5
>120
-260
±2.0||tt| |>260
~500
±3.0
>500
800
±4.0
>60～100||tt| |+4
1
>800
~1200
±5.5
5.3.3 The surface roughness of castings should comply with GB6060.1 It is stipulated that the grade shall be determined by agreement between the supply and demand parties. 5.4 Repair welding
5.4.1 Repair welding is allowed for defects in castings. The repair welding metal should have a composition similar to that of the casting mm
mm
>1200
～2000||tt ||±7.0
5.4.2 When the groove depth of the repair welding casting defect exceeds 20% of the wall thickness or 25mm (determined by one of the two values), or when the groove area exceeds 65cm2, it is considered It is a large-area repair welding. Large-area repair welding requires the prior consent of the purchaser. 6 Test methods and inspection rules
6.1 Chemical analysis
6.1.1 Chemical analysis of castings Samples are taken from the ladle during the injection process, and one sample is taken from each bag. 6.1.2 Chemical analysis shall be in accordance with the provisions of GB223. 6.2 Mechanical property test
6.2.1 The test block for measuring mechanical properties shall be as specified in Appendix B (Supplement), and the test block shall be prepared during the pouring process. 6.2.2 The tensile test shall be in accordance with the provisions of GB228. 6.3 The shape and size of castings should comply with the drawing requirements. If the party provides a sample, it will be determined based on the size of the sample. 6.4 The surface quality of castings shall be inspected visually. 6.5 The cast holes in the castings must be inspected one by one with sample blocks for passability. 6.6 Finished product approval analysis shall be carried out by the purchaser from representative castings of each furnace (or batch). The carbon analysis sample shall be taken at a distance less than 6rmrm from the surface of the casting. | | tt | For qualified projects, the results must all meet the regulations to be qualified. 6.7.2 When the performance of the heat-treated sample does not meet the requirements in Table 2, the test block and the casting can be re-heat-treated and retested, but the heat treatment cannot be repeated more than 2 times.
7 Quality certificate, logo and packaging
7.1 The quality certificate should include: supplier name, order number, drawing number, name, steel number, heat number, chemical composition, mechanical properties, etc. 7.2 Castings should be marked as follows: order number, drawing number, name, steel number, heat number, etc. 7.3 Packaging and shipping shall be determined by agreement between the supplier and the buyer. 183
181
Element
C
Mn
P
s
Si
Cr| |tt||Ni
JB/T 6403-92
Appendix
A
Permissible deviation of chemical composition of finished product
(supplement)||tt ||Table A1 Allowable deviation content range of chemical composition of finished large heat-resistant steel castings
0.10
>0. 10~0. 30
>0.30~0. 60||tt ||>0. 60-1. 20
≥>1.20
1.00
>1. 00 ~3. 00
>3. 00~6. 00
6. 00~10. 00
> 10. 00~15. 00
>15.00
0.04
>0.04
0.04
>0. 04 ~ 0. 20
>0.20
1.00
>1. 00 ~3. 00
>3.00
>4. 00~10. 00
>10. 00~15. 00
>15～20
>20～30
>30
≤1.00
>1. 00~5. 00
>5. 00~10. 00
>10. 00~-20. 00
>20.00～~30. 00
>30. 00~50. 00
>50. 00~75. 00
>75. 00～~99. 99. 0.05
0.03
0.04
0.05
0.06
0.10
0.15
0.005
0.010| |tt||0.005
0.010
0.020
0.05
0.10
0.15
0.10
0.10||tt ||0.20
0.25
0.30
0.03
0.07
0.10
0.15
0.20
0.30
0.50
0.70
%
素
元
Mo
Ti
Co| |tt||Nb+Ta
Ta
Cu
A
W
V
Se
李| |tt||JB/T 6403-92
结表A1
量在线
0.60
>0. 60~2. 00
>2. 00~7. 00||h||≥7.00~12.00||h||>12. 00||h||1.00||h||>1. 00 ～ 3. 00||h||0.50||h||>0. 50～2.00
>2.00
1.50
0.10
o.50
20. 50～1. 00
21. 00--3. 00
>3. 00r~5. 00
>5. 00~10. 00
>10.00
0.15
>0.15～0.50
>0.50～2.00
0.02
>0. 02 ~ 0. 19
>0. 19~～0. 25
>0. 25 ~0. 35
20. 35~0. 45
1.00
≥1. 00～2. 00. 03
0.05
0.10
0.15
0. 20
0.05
0.07
0.01
0.02
0.05
0. 05
0.02
0.03
0. 05
0.10
0.15
0.20
0.30
-- 0.005,+0.01
0.05
0.10|| tt||0.005
0.01
0.02
0.03
0.04
0.03
0.05
0.07||tt| |0.03
0.05
0.03
185
JB/T 6403—92
附能B
滨造试块图||tt ||（公式件）
tt||B1 电影力学者的的单死试块按图B1或图B2选用。70
5
R10
图B1|| tt||200
120
图B2
附能C
各钢种电影下例
（参考件）
Ri2| |tt||表C1各钢种最好使用风度及characteristics、电影下例牌
号
（原牌号）
ZG40Cr9Si2
(ZG4C+9Si2)
ZG30Cr18Mn12Si2N
(ZG3Cr18Mn12Si2N)
ZG35Cr24Ni7SiN
186
最好使用水水C
800
950||tt ||1100
01
特及电影下例
高要开动低，报化最好至800C，long-term working time受载件work temperature lower than 700℃，used for汱度、炉门、底板 etc. components have good high temperature strength and anti-heat fatigue, used for 炉馕、炉底板、洗衣、transport belt guide rail、支承架、含飞 etc.理、炉蛼。 air-conditioning machine 叶王、热滑院、炉底板、瓶、水泥穿及糖瓷案等推行牌
号
（原牌号）
ZG20C126Ni5|| (ZG3Cr26Ni5) |ZG40Cr30Ni20
(ZG4Cr30Ni20)
ZG35Ni24Cr185i2
ZG30Ni35Cr15
(ZG3Ni35Cr15)(ZG45Ni35Cr26)
ZG40Cr22Ni4N
ZG30Cr25Ni20
(ZG3C/25Ni20)
ZG20Cr20Mn9Ni2SiN
(ZG2Cr20Mn9Ni2Si2N)
ZG08Cr18Ni12M02Ti
(ZG0Cr18Ni12Mo2Ti)
addition Description：
JB/T 6403:92
Continued table Cl
Maximum operating temperature ℃
Examples of characteristics and uses
The operating temperature can reach 650℃ under load and up to 1050 under light load|| tt||900
1100
1150
1150
1150
1100
1150
1150||tt| |1050℃, the phase is easy to precipitate between 650~870℃, it can be used in ore roasting furnaces, and can also be used in furnaces that work in high-sulfur environments that require high temperature and strength. The structure is basically shapeless, and can be used in refinery heating furnaces, cement Dry and dense, ore roasting furnace and heat treatment furnace components
High temperature strength and good oxidation resistance. By adjusting its composition within the specification range, the structure can contain some ferrite or single-phase austenite. It can be widely used in a variety of furnace components, but it is not suitable for use in situations where the temperature changes rapidly. It has high temperature oxidation resistance. The use is the same as that of ZG40Cr25Ni20. It has high caries change and lasting strength, and strong resistance to high-temperature gas corrosion. It is often used as furnace rollers, radiant tubes, steel bad slides, heat treatment furnace rollers, tube supports, hydrogen production conversion tubes, and ethylene media tubes || tt||has good corrosion resistance in high-temperature sulfur-containing gases and is used for gas separation devices and roaster linings
for heating protective conveyor belts, screws, fasteners and other high-temperature bearing components. It has good thermal fatigue resistance. Used for carbon furnace components, heat treatment furnace plates, guide rails, wheels, brazing fixtures, stills, radiant tubes, glass rollers, porcelain dense components and periodic heating fasteners
Anti-oxidation and carbon fall resistance Good, high temperature strength, used for ethylene cracked tubes, radiant tubes, elbows, joints, tube brackets, furnace rollers and heat treatment clamps, etc. For furnace parts above 1000℃
Used above 1000℃ Furnace parts
Used for continuous casting machine hangers, etc.
Used for continuous casting machine spare parts
This standard was proposed and centralized by Deyang Large Forging Research Institute of the Ministry of Mechanical and Electronic Industry. This standard is 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 Zhen Bingren.
127
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.