This standard specifies the technical requirements for washing machine goods, manufacturing and acceptance of stainless steel castings. This standard applies to large stainless steel sand castings for general purposes. JB/T 6405-1992 Large stainless steel castings JB/T6405-1992 Standard download and decompression password: www.bzxz.net

Machinery Industry Standards of the People's Republic of China
Large non-rusting
Rust
Within the subject and scope of application
Steel castings
This standard specifies the ordering, Manufacturing and acceptance technical requirements. This standard applies to large stainless steel sand castings for general purposes. Referenced standards
2
GB222
GB223
GB 228
GB231
Sampling method for chemical analysis of steel and finished product chemistry Composition Allowable Deviation Chemical Analysis Methods for Steel and Alloys
Metal Tensile Test Methods
Metal Brinell Hardness Test Methods
Surface Roughness Comparison Samples
Casting Surface|| tt | |GB11352
3 Ordering Requirements
3.1 The party shall specify the name of the casting, steel number, quantity and supply status, etc. in the order contract. JB/T 6405.92
3.2 The purchaser shall provide ordering drawings that have been jointly approved by both parties. 3.3 When the demander puts forward special requirements and supplementary requirements beyond the provisions of this standard, they should be negotiated and confirmed by both parties. 4 Manufacturing
4.1 Smelting
Steel for castings should be smelted using induction furnaces, electric arc furnaces, ladle refining furnaces or other smelting methods that meet the requirements. 4.2 Casting
If the demander has no special requirements, the supplier shall decide on his own. 4.3 Heat treatment
4.3.1 Castings should be heat treated. Normally, heat treatment is performed by the supplier. The heat treatment specifications are shown in Table 1. Table 1 Heat treatment specifications for stainless steel castings
Cast steel grades
ZG15Cr13
ZG20Cr13
ZG30C113
ZG12Cr18Ni9Ti
Heat treatment specifications
(1) Heated to ≥995℃; air-cooled, and tempered at ≥595℃ or (2) Annealed at ≥790℃, heated to ≥1040℃, maintained for sufficient time. Water rate or other methods that can meet the acceptance conditions. The Ministry of Mechanical and Electronic Industry of the Republic approved 192
1993-07-01 implementation on 1992-07-01
Cast steel grade
ZG06Cr13Ni4Mo
ZG06Cr13Ni6Mo
ZG09Cr19Nig| | tt |
JB/T 6405-92
Continued Table 1
Heat treatment specifications
(1) Annealing should be >600℃, (2) Normalizing and rate fire: in Carry out above Ac3 point: (3) Tempering: Carry out
times or secondary tempering
above and below Aci point. Heating to ≥1040℃, keep for enough time, water rate or use other rapid cooling methods Heating to ≥1D93℃, keeping for a sufficient time, water rate or other rapid cooling method, heating to 1100~1150℃, keeping for a sufficient time, water quenching or other rapid cooling method. The chemical composition of stainless steel castings should comply with the provisions of Table 2. 5.2
Mechanical properties
The mechanical properties of the castings after heat treatment should comply with the requirements in Table 3. Surface hardness is not the basis for acceptance. 5.3 Defect removal and repair welding
5.3.1 Castings should be cooled to a certain temperature in the mold and unpacked, and visible defects on the surface should be removed after softening and annealing. When removing defects at high temperatures, the minimum preheating temperature for castings should be as specified in Table 4. 5.3.2
5.3.3 Casting defects are allowed to be repaired by repair welding. Before repair welding, all defects must be removed to expose the dense metal surface. 5.3.4 The electrodes used for repair welding are divided into martensitic stainless steel electrodes and austenitic stainless steel electrodes or other electrodes of the same material. 5 When repair welding using martensitic electrodes of the same material, it should generally be carried out after softening annealing and before final heat treatment. Unless otherwise specified, 5.3.5
Repair welding using martensitic electrodes should be carried out after welding elimination Stress treatment. 5.3.6 The repair welding of major defects should be agreed upon by the supplier and the buyer. For chromium, manganese and (nickel) nitrogen steel castings that require crystal corrosion tendency test or impact toughness test (or both), they should be repaired after repair welding. Perform solution treatment. 5.4 Surface quality and dimensional tolerance of castings
5.4.1 Casting defects such as cracks, cold shuts, pores and sand adhesion are not allowed on the surface of castings. 5.4.2 The dimensional tolerance of castings should comply with the regulations of GB6414. The surface roughness of castings should comply with the requirements of GB6060.1. 5.4.3
Table 2 Chemical composition
Cast steel grade
ZG15Cr13
(ZG1Cr13)
ZG20Cr13
(ZG2Cr13)|| tt||ZG30Cr13
(ZG3Cr13)
ZG12Cr18Ni9Ti
(ZG1Cr18Ni9Ti)
c
Si
≤0.151.50||tt ||0.16
-0.24
0.20
0.40
0.12
Mn
P
C||tt| |≤1. 00 0. 040 0. 040
0. 601 0. 0300. 035
1.00
1.50
50
≤1.000. 040
0.80
2.00
0.040
0.0300.040
Cr
11.5
14.0
11.5
14.0
11.5
14.0
17.0
20.0
Ni
Mo
1.00≤ 0.05
≤1.000.05
8.00
11.00
Ti
5 (C
0.03%
～0 ,80
Cu
%
N
193
steel plate
cast
No.
ZG06Cr13Ni4Mo
(ZG0Cr13Ni4Mo)
ZG06C113Ni6Mo
(ZGOCr13Ni6Mo)
ZG08Cr19Ni9
(ZG0Cr19Ni9)
ZG08Cr19Ni11M03
(ZG0Cr1 9Nil1Mo3 )
ZG12Cr22Ni12
(ZG1Cr22Ni12)
ZG20Cr25Ni20
(ZG2Cr25Ni20)
≤0.061.00
≤0. 060. 70| |tt||JB/T 6405
92
Continued Table 2
IMn
P
5
T cr||tt ||1.00/ 0.030 0.030
X
≤0.800.030 0.030
12. 00 |≤1.50| 0. 040 |0. 040|0.08| |tt||≤0.081.50
1.50/0.040
≤0.12 2. 00
1.500.040
0.20
2.00||tt| |ZG12Cr17Mn9Ni4M03Cu2N
(ZG1Cr17Mn9Ni4Mo3Cu2N)
ZG12Cr18Mn13Mo2CuN
(ZG1Cr18Mn13Mo2CuN)
0.12
1.50
≤0.12/ 1.50
Note: The traditional cast steel grades in brackets
cast steel grades
ZG15Cr13
ZG20Cr13
ZG30Cr13
ZG12Cr18Ni9Ti| |tt||ZG06Cr13Ni4Mo
ZG06Cr13Ni6Mo
ZG08Cr19Ni9
ZG08Cr19Ni11Mo3
ZG12Cr22Ni12
ZG20Cr25Ni20
|tt||ZG12Cr18Mn13Mo2CuN||tt ||Cast steel grade
ZG15Cr13
ZG20Cr13
ZG30Cr13
its
19-
him
0.040|| tt||0.040
≤1. 50| 0. 040 0. 040
18.00
~10.00
12.00
0. 0600.035||tt ||0.060
0.035
[~14.00
Table 3 Mechanical properties
ap
MPa
620
588
690
440
760
750
485
520
485
450|| tt||588
588
MPa
450
392
485
195
550||tt| |550
205
240
195
195
294
294
11.5
Ni
Mo
3.501\0.40
~14. 0|~4. 50~ 1. 00]
12.0
5.50↓ 0.40||tt ||~14.0
17.0
6.50~1.00
8.00
21.0
18.0
11.o0
9.00
3.00
21.0
13.004.00
20.0
~23.0
23.0
10.00
~13.00
19.00
27. 0j31. 00
16.00
3.00
2.90
~19. 00 ~ 5. 00 ~ 3. 50
17.00
20.0c
%
18
16
15
25||tt| |15
15
35
25
35
30
25
30
table 4 When the defects are eliminated at high temperature, the casting preheating temperature is 1.50
2.00
4
%
30
35
25||tt| |32
35
35
35
40
Minimum preheating temperature of castings
200℃
Chamber| |tt||Warm
7
Cu
%
N
2. 00 0. 16
~2. 50~ 0. 26
.00
0.19
~1.50~0.26
HB
241
170~235
269
≥220
≥220
t
6 Test methods and inspection rules
6.1 The chemical analysis sample is based on the ladle melting sample. JB/T 6405-- 92
6.1.1 When the purchaser requires product analysis, the allowable deviation of chemical composition shall comply with the provisions of GB8492. 6.2 Mechanical property test
6.2.1 The roughness of the specimen for mechanical properties shall be in accordance with the provisions of GB11352. 6.2.2
The test block for mechanical properties shall be heat treated in the same furnace as the casting it represents. At least one tensile specimen shall be taken from each smelting furnace and each heat treatment furnace.
When the purchaser requires a body sample, the location and shape of the attached cast test block shall be agreed upon by both parties. 6.2.3
6.3 The sampling method for chemical analysis shall be in accordance with the provisions of GB222. The arbitration analysis shall be in accordance with the provisions of GB223. 6.4 The tensile test shall be in accordance with the provisions of GB228. 6.5 The Brinell hardness test is in accordance with the provisions of GB231, and the hardness testing location is determined by the supplier. 7 Retest and reheat treatment
7.1 When the mechanical property test results are unqualified, double samples of the same condition should be taken for retesting. If the test results are still unqualified, the casting and the spare sample should be reheated. Re-carry out all inspections. 7.2 Solution heat treatment or re-austenitization shall not exceed 2 times. 8 Quality certificate and logo
8.1 The quality certificate should include: order number, drawing number, name, steel number, furnace number, chemical composition, mechanical properties, etc. 8.2 Castings should have the following markings: order number, drawing number, heat number, etc. Additional notes:
This standard oil is proposed and centralized by the Deyang Large Casting and 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 Liu Xiaoguang.
195
00
21.0
18.0
11.o0
9.00
3.00
21.0
13.004.00||tt ||20.0
~23.0
23.0
10.00
~13.00
19.00
27. 0j31. 00
16.00
3.00
2.90
~19. 00 ~ 5. 00 ~ 3. 50
17.00
20.0c
%| |tt||18
16
15
25
15
15
35
25||tt ||35
30
25
30
Table 4 Casting preheating temperature when eliminating defects at high temperature 1.50
2.00
4| |tt||%
30
35
25
32
35
35
35||tt ||40
Minimum preheating temperature of castings
200℃bzxz.net
Room
Temperature
7
Cu
%
N
2. 00 0. 16
~2. 50～0. 26
.00
0.19
~1.50 ~0.26
HB
241
170~235
269
≥220
≥220
t|| tt||6 Test methods and inspection rules
6.1 The chemical analysis sample is based on the ladle smelting sample. JB/T 6405-- 92
6.1.1 When the purchaser requires product analysis, the allowable deviation of chemical composition shall comply with the provisions of GB8492. 6.2 Mechanical property test
6.2.1 The roughness of the specimen for mechanical properties shall be in accordance with the provisions of GB11352. 6.2.2
The test block for mechanical properties shall be heat treated in the same furnace as the casting it represents. At least one tensile specimen shall be taken from each smelting furnace and each heat treatment furnace.
When the purchaser requires a body sample, the location and shape of the attached cast test block shall be agreed upon by both parties. 6.2.3
6.3 The sampling method for chemical analysis shall be in accordance with the provisions of GB222. The arbitration analysis shall be in accordance with the provisions of GB223. 6.4 The tensile test shall be in accordance with the provisions of GB228. 6.5 The Brinell hardness test is in accordance with the provisions of GB231, and the hardness testing location is determined by the supplier. 7 Retest and reheat treatment
7.1 When the mechanical property test results are unqualified, double samples of the same state should be taken for retesting. If the test results are still unqualified, the casting and the spare sample should be reheated. Carry out all inspections again. 7.2 Solution heat treatment or re-austenitization shall not exceed 2 times. 8 Quality certificate and logo
8.1 The quality certificate should include: order number, drawing number, name, steel number, furnace number, chemical composition, mechanical properties, etc. 8.2 Castings should have the following markings: order number, drawing number, heat number, etc. Additional notes:
This standard oil is proposed and centralized by the Deyang Large Casting and 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 Liu Xiaoguang.
195
00
21.0
18.0
11.o0
9.00
3.00
21.0
13.004.00
20.0
~23.0
23.0
10.00
~13.00
19.00
27. 0j31. 00
16.00
3.00
2.90
~19. 00 ~ 5. 00 ~ 3. 50
17.00
20.0c
%
18
16
15
25
15
15
35
25
35
30
25
30
Table 4 Preheating temperature of castings when eliminating defects at high temperature 1.50||tt| |2.00
4
%
30
35
25
32
35
35
35
40
Minimum preheating temperature of casting
200℃
Room
Temperature
7
Cu
%
N
2. 00 0. 16
~2. 50～0. 26
.00
0.19
~1.50～0.26
HB
241
170~235
269
≥220
≥220
tt
6 Test methods and inspection rules
6.1 Chemical analysis samples are based on ladle melting samples. JB/T 6405-- 92
6.1.1 When the purchaser requires product analysis, the allowable deviation of chemical composition shall comply with the provisions of GB8492. 6.2 Mechanical properties test
6.2.1 The rough test pieces for mechanical properties shall be in accordance with the provisions of GB11352. 6.2.2
The test pieces for mechanical properties shall be heat treated in the same furnace as the castings they represent. At least one tensile test piece shall be taken from each melting furnace and each heat treatment furnace.
When the purchaser requires a body test piece, the location and shape of the cast test piece shall be agreed upon by both parties. 6.2.3
6.3 The sampling method for chemical analysis shall be in accordance with the provisions of GB222. The arbitration analysis shall be in accordance with the provisions of GB223. 6.4 The tensile test shall be in accordance with the provisions of GB228. 6.5 The Brinell hardness test shall be in accordance with the provisions of GB231, and the hardness test location shall be determined by the supplier. 7 Retest and reheat treatment
7.1 When the mechanical properties test results are unqualified, double samples of the same state shall be taken for retesting. If the test results are still unqualified, the casting and the spare sample shall be reheat treated and all tests shall be re-performed. 7.2 Solution heat treatment or re-austenization shall not be performed more than twice. 8 Quality certificate and mark
8.1 The quality certificate shall include: order number, drawing number, name, steel grade, furnace number, chemical composition, mechanical properties, etc. 8.2 Castings shall have the following marks: order number, drawing number, furnace number, etc. Additional notes:
This standard was proposed and coordinated by the Deyang Large Castings and Forgings Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Deyang Large Castings and Forgings Research Institute of the Ministry of Machinery and Electronics Industry. The main drafter of this standard is Liu Xiaoguang.
195
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