JB/T 4328.1-1999 General technical requirements for grey iron castings for electrical equipment
Some standard content:
JB/T4328.1-1999
This standard is a revision of JB4328.1-86 "General Technical Conditions for Cast Iron Parts for Electrical Equipment". Appendix A of this standard is the appendix of the standard.
When no requirements are made in drawings or technical documents, they shall comply with the provisions of this standard. This standard replaces JB4328.1-86 from the date of implementation. This standard is proposed and managed by Shenyang Electrical Equipment Research Institute. This standard is drafted by Shenyang Electrical Equipment Research Institute and Shenyang Electrical Machinery Co., Ltd. The main drafters of this standard are Song Junfa and Chen Jiashan. This standard was first issued on December 1, 1986, and this standard was revised for the first time. This standard is entrusted to Shenyang Electrical Equipment Research Institute for interpretation. 51
Machinery Industry Standard of the People's Republic of China
Special Equipment for Electricians
General Technical Conditions for Grey Cast Iron Products
Grey cast iron products general requirementsfortheelectrician special equipmentJB/T4328.1-1999
JB4328.1—86
This standard specifies the grades, requirements, test methods, inspection rules, markings and quality certificates for grey cast iron products for theelectrician special equipment. This standard applies to the manufacture of grey cast iron products for theelectrician special equipment. 2 Referenced Standards
The following standards contain provisions. The provisions of this standard are constituted by reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. JB/T7945—1995 Mechanical properties test method for gray cast iron parts 3 Requirements
3.1 Gray cast iron grades
Based on the tensile strength of single cast test bars with a diameter of Φ30imm, gray cast iron is divided into six grades: HT100, HT150, HT200, HT250, HT300 and HT350. The structural type of the single cast test bar is shown in Figure 1. 3.2 Mechanical properties
3.2.1 Tensile strength
3.2.1.1 Tensile strength of single test bar
The tensile strength of gray cast iron measured by the test bar processed from the single test bar in this standard shall comply with the provisions of Table 1. Table 1 Tensile strength of single cast test bar
3.2.1.2 Tensile strength of attached cast test bar (block) Minimum tensile strength
When the wall thickness of the casting exceeds 20mm and the weight exceeds 200kg, and there are special requirements, after consultation and agreement between the supply and demand parties, the attached cast test bar (see Figure 2) or attached cast test block (see Figure 3) with similar cooling conditions to the casting can also be used to measure the tensile strength. The tensile strength of the test result is closer to the performance of the casting material than the tensile strength of the single test bar. Its tensile strength should meet the requirements of Table 2. 55
830(850)
@30*!
Figure single cast test piece
R15(R25)
Figure 3 Test block
3050）
Figure 2 Test bar
Thickness of casting joint
JB/T4328.1-1999
Table 2 Tensile strength of cast test piece (block)
Minimum tensile strength
Cast test condition
Φ50mm
HT100 gray iron castings have low strength at the section, and the values in brackets are applicable when the casting wall is larger than the specimen diameter. 3.2.1.3 Tensile strength of gray cast iron parts with different thicknesses Attached casting test block
(for reference only)
The tensile strength of gray cast iron parts is related to the casting film thickness. Different waist thicknesses of gray cast iron parts of the same brand will obtain different tensile strengths: In order to facilitate design and use. Table 3 gives the reference values of tensile strength that can be achieved by gray castings of different thicknesses of various brands: When the supply and demand parties agree, the properties of the casting material can also be determined by adding 10% of the test blocks cut from the castings to the test pieces. The tensile strength should meet the requirements of Table 3
3.2.2 Hardness
JB/T4328.1-1999
Table 3 Tensile strength of castings
Stop working
When hardness is used as a test for the mechanical properties of gray cast iron parts, it should meet the requirements of Table 4. Table 4 Hardness grade of grey iron castings Hardness grade Minimum tensile strength Hardness range HB 150-200 170-220 190-240 210-260 230-280 JB/T 4328.1-1999 3.3 The dimensional tolerance of castings shall comply with the provisions of Table AI of Appendix A: The dimensional tolerance values of castings shall comply with the provisions of Table A2 of Appendix A The misalignment values of castings shall comply with the provisions of Table A3 of Appendix A 3.3.1 The dimensional tolerances specified in this standard are symmetrically distributed: When the product is to be asymmetrically distributed, it must be clearly stated in the drawings and relevant technical documents. 3.3.2 The dimensional tolerance grade of grey iron castings when the basic size is greater than 25 mm: Green sand mold: CT13~CT15
White hard sand mold: CT11~CT13
When the minimum tolerance of the joint thickness is given, it should be one level lower than the above minimum tolerance grade: that is: Green sand mold: CT14~CT16
Self-hardening sand: CT12~CT14
3.3.3 When the basic dimension of gray iron castings is not more than 25mm, it should meet the following requirements: a) When the basic dimension is less than 10mm, the dimensional tolerance grade is increased by three levels. That is: wet sand mold: CT10~CT12
white hard sand mold: CT8-CT10;
b) When the basic size is less than 10mm and less than 16mm, the dimensional tolerance grade is increased by two levels, that is: wet sand mold: CT11~CT13
white hard sand mold: CT9~CT11;
c) When the basic size is less than 16mm and less than 25mm, the dimensional tolerance grade is increased by one level, that is: wet sand mold: CT12~CT14
self-hardening sand mold: CT10~CT12
3.3.4 The dimensional tolerance grade of gray iron castings shall be indicated in the drawings or technical documents. When marking, the minimum dimensional tolerance grade specified in this standard shall be implemented.
3.3.5 Different parts of the same gray iron casting. Different dimensional tolerance grades are allowed, but the dimensional tolerance values must be indicated in the drawings or technical documents:
3.4 Density and apparent quality
3.4.1 The density of gray cast iron
HIT100~HT200 is 7.2kg/dml
HT250~HT350 is 7.35kg/dim
3.4.2 The apparent quality of gray cast iron parts shall comply with the provisions of Table 5: 3.4.3 Without affecting the service life and mechanical properties of the casting Under the condition that the defects that can be removed by machining, the defects that are allowed to exist on the non-casting surface of the casting shall comply with the provisions of Table 6:
3.5 Quality of the cast iron surface
3.5.1 Defects of cast iron surface: All defects that can be removed by machining are generally allowed to exist. Under the condition that the service life and performance are not affected, the defects that are allowed to exist on the surface after machining shall comply with the provisions of Table 7:3.5.2 On the cast surface and non-casting surface of important parts, defects are not allowed to appear simultaneously on the symmetrical positions on both sides of the same connection and the same section.
Molding sand, core sand
Stretching ribs
Gating outlet hole
Parts category
Defect condition
Sand holes
Clean hole shrinkage hole
Scar, etc.
Cold shut, wrinkle
Defect size
JB/T 4328.1-1999
Residual contamination
Not allowed to exist
Not allowed to exist
External surface: Not allowed to exist
Inner surface: Any that may fall off during use and fluid flow channels must be removed
After grinding, the allowable margin is ≤1.5
≤15 (the retaining margin may not be removed)\west ≤1.5The margin that must be removed during processing shall be noted in the process documents Table 6
Important parts and important parts
Defect depth
《17 case
1.5mm I store
hole depth
17 where the wall library
number of defects
p200mm
range runner
more than 3
middle100mm
not many in the circle
d100mm
not many in the shadow
lower 2
after trimming, the thickness should be within the size deviation range. Defects are exposed between:
defect size
! On the same casting. There are two different important parts, and the defects are calculated according to the total number. For the same parts, there are no defects, and they are controlled by 15 respectively. The depth of defects is ≤1/3 of the minor parts and minor parts. The residual depth is ≤1.5mm. The hole depth is ≤1/7 of the forbidden defects. The number of defects is not more than 3. The number of defects is not more than 2. The number of defects is not more than 100mm. The distance between the defects and the casting defects is not more than 3.5.3. After the casting is processed or machined, if the casting defects exceed the provisions of 3.4.2 but do not exceed the provisions of Table 8, and have repair value and do not affect the service life and performance of the parts, then Allowable repair: 57
Casing table
Parts type
Non-box
Box parts
Defect size
Small Ding tooth groove
Total area of sand
Where the table provides
Percentage%
Hole limit circumference
Degree ≤1/5 wheel circumference
Length, hole limit in diameter||tt ||Width or 1 round
General operation
Hole≤10
Defect depth
Wheel thickness
JB/T4328.1-1999
Depression condition
Sand hole,
Air hole, liquid hole, shrinkage hole
Number of defects
Not allowed to exist
Within 50mm||t t||Within 50mm
Within less than 50mm
1/5 tooth thickness
≤1/10
Not many on the same tooth surface
Not many on the same tooth groove
More than 1
Defect distance
Defect
Total number of defects (pieces)
Number of defective teeth≤1/12Total teeth||tt| | number, not allowed to appear continuously on 3
streets or 2 streets
Defect conditions
Sand holes, pores, slag holes, shrinkage holes, cracks Number of defects in the whole process
10,000 wall
≤V15 wheel section
≤1/2 conveyor plate original
crack surface
crack length and
crack along the surface The ratio of the square length of the groove is ≤1/3≤1/4. In Ruichuan, the wave (gas) pressure is used for important screw holes, sealing surfaces, friction surfaces, inner surfaces of bushings, etc. Other matching but non-matching processing such as flange housings, 1 lower joint surfaces, seals, external card surfaces, and keys. |tt||Flange wheel end face
Casting crack
≤1/2
No distribution
Number of lines
(pieces)
Before welding repair, the defects must be cleaned to good metal, and the surface of the groove and the groove 30mm away from the edge of the glass must be cleaned. For defects in non-important parts, materials such as Sichuan cyclopentane resin can be used for repair. After welding repair, the repaired area should be repaired to meet the surface quality requirements of the casting. After coal filling, the castings that originally required aging treatment must be aged. Castings with airtightness requirements must be subjected to penetration test. For castings with hardness requirements, the difference between the hardness of the welded repair and the carbon content of the parent part should be within the range of +20.3.6 Gray cast iron parts are generally prepared for aging treatment. If there are other special requirements, they should be indicated in the drawings or relevant documents. 4 Test methods
The mechanical properties test of gray cast iron parts shall be carried out in accordance with the provisions of JB/T7945. 5 Inspection rules
Gray cast iron parts shall be inspected by the supplier's technical inspection department according to the drawings, relevant design documents and standards. After passing the inspection, they can be put into the warehouse after the primer is applied on the surface. The buyer has the right to conduct re-inspection. The following inspections must be carried out on gray cast iron parts before they leave the factory: a) Mechanical properties:
b) Surface quality;
c) Dimensions and geometric shapes.
Mark and quality certificate
Grey iron castings shall have the manufacturer's mark.
6.2 Grey iron castings shall be accompanied by a quality certificate signed by the inspection department before leaving the factory, which must indicate: a) Manufacturer's name or code:
b) Part name, drawing code and quantity: c) Brand (important castings shall indicate the furnace number); d) Various inspection results;
e) Standard number.
JB/T4328.1-1999
Appendix A
(Standard Appendix)
Dimensional tolerances of grey iron castings
AI The dimensional tolerances of grey iron castings shall comply with the provisions of Table A1 Table A1 Small tolerance values of castings
Basic dimensions of castings
Tolerance grades CT
CTI and CT2 do not specify tolerance values. 2.8
2CT13 to CT16 Small or below 16mm bell its basic size, its tolerance value needs to be marked separately, can be increased by 2-3 levels A2 size less than 10mm gray cast iron size tolerance value should comply with the provisions of Table A2 Table A2 Casting size tolerance value
Basic size of castings
Gray cast iron parts misalignment value should comply with the provisions of Table 3 13
Grade CT
Tolerance grade CT
Note: Misalignment value can be agreed upon by both parties if necessary. JB/T4328.1-1999
Table A3 Misalignment value Www.bzxZ.net
Misalignment value mm
Table 1 Table 2 tolerance within1-1999
Sunk condition
Trachoma,
Blowholes, liquid holes, shrinkage holes
Number of defects
Not allowed to exist
Within the middle 50mm
Within the 50mm
Within the small 50mm
1/5 tooth thickness
≤1/10
Not many on the same tooth surface
Not many on the same tooth groove
More than 1
Defect distance
Total number of defects on the workpiece (pieces)
Number of defective teeth ≤1/12 of the total number of teeth
, and it is not allowed to appear continuously on 3
surfaces or 2 grooves
Defect conditions
Number of defects on the workpiece
10,000 locations
≤V15 wheel section
≤1 /2 The ratio of the crack length on the surface where the original crack of the transmission plate is located to the crack length along the surface along the direction of the crack is ≤1/3 ≤1/4 In Ruichuan, the wave (gas) pressure is used as the important screw hole, the sealing surface, the friction surface, the inner surface of the bushing, etc. Other matching flanges, housings, and the lower joint surface will be sealed with external cards. The surface key is not matched with the processing, such as the wheel flange, the wheel end face, the crack on the casting is ≤1/2, and the number of lines is not allowed to be stored in the warehouse (pieces). Before welding, the defects must be cleaned to good metal, and the 30mm range from the edge of the glass and the groove surface are cleaned. The defects in non-important parts can be repaired with materials such as Sichuan cyclopentane resin. After welding, the repaired area should be repaired to meet the surface quality requirements of the casting. After coal filling, the castings that originally required aging treatment must be aged. Castings with airtightness requirements must be subjected to penetration test. For castings with hardness requirements, the difference between the hardness of the welded repair and the carbon content of the parent part should be within the range of +20.3.6 Gray cast iron parts are generally prepared for aging treatment. If there are other special requirements, they should be indicated in the drawings or relevant documents. 4 Test methods
The mechanical properties test of gray cast iron parts shall be carried out in accordance with the provisions of JB/T7945. 5 Inspection rules
Gray cast iron parts shall be inspected by the supplier's technical inspection department according to the drawings, relevant design documents and standards. After passing the inspection, they can be put into the warehouse after the primer is applied on the surface. The buyer has the right to conduct re-inspection. The following inspections must be carried out on gray cast iron parts before they leave the factory: a) Mechanical properties:
b) Surface quality;
c) Dimensions and geometric shapes.
Mark and quality certificate
Grey iron castings shall have the manufacturer's mark.
6.2 Grey iron castings shall be accompanied by a quality certificate signed by the inspection department before leaving the factory, which must indicate: a) Manufacturer's name or code:
b) Part name, drawing code and quantity: c) Brand (important castings shall indicate the furnace number); d) Various inspection results;
e) Standard number.
JB/T4328.1-1999
Appendix A
(Standard Appendix)
Dimensional tolerances of grey iron castings
AI The dimensional tolerances of grey iron castings shall comply with the provisions of Table A1 Table A1 Small tolerance values of castings
Basic dimensions of castings
Tolerance grades CT
CTI and CT2 do not specify tolerance values. 2.8
2CT13 to CT16 Small or below 16mm bell its basic size, its tolerance value needs to be marked separately, can be increased by 2-3 levels A2 size less than 10mm gray cast iron size tolerance value should comply with the provisions of Table A2 Table A2 Casting size tolerance value
Basic size of castings
Gray cast iron parts misalignment value should comply with the provisions of Table 3 13
Grade CT
Tolerance grade CT
Note: Misalignment value can be agreed upon by both parties if necessary. JB/T4328.1-1999
Table A3 Misalignment value
Misalignment value mm
Table 1 Table 2 tolerance within1-1999
Sunk condition
Trachoma,
Blowholes, liquid holes, shrinkage holes
Number of defects
Not allowed to exist
Within the middle 50mm
Within the 50mm
Within the small 50mm
1/5 tooth thickness
≤1/10
Not many on the same tooth surface
Not many on the same tooth groove
More than 1
Defect distance
Total number of defects on the workpiece (pieces)
Number of defective teeth ≤1/12 of the total number of teeth
, and it is not allowed to appear continuously on 3
surfaces or 2 grooves
Defect conditions
Number of defects on the workpiece
10,000 locations
≤V15 wheel section
≤1 /2 The ratio of the crack length on the surface where the original crack of the transmission plate is located to the crack length along the surface along the direction of the crack is ≤1/3 ≤1/4 In Ruichuan, the wave (gas) pressure is used as the important screw hole, the sealing surface, the friction surface, the inner surface of the bushing, etc. Other matching flanges, 1 lower joint surface, and the seal will be externally carded The surface key is not matched with the processing, such as the wheel flange, the wheel end face, the crack on the casting is ≤1/2, and the number of lines is not allowed to be stored in the warehouse (pieces). Before welding, the defects must be cleaned to good metal, and the 30mm range from the edge of the glass and the groove surface are cleaned. The defects in non-important parts can be repaired with materials such as Sichuan cyclopentane resin. After welding, the repaired area should be repaired to meet the surface quality requirements of the casting. After coal filling, the castings that originally required aging treatment must be aged. Castings with airtightness requirements must be subjected to penetration test. For castings with hardness requirements, the difference between the hardness of the welded repair and the carbon content of the parent part should be within the range of +20.3.6 Gray cast iron parts are generally prepared for aging treatment. If there are other special requirements, they should be indicated in the drawings or relevant documents. 4 Test methods
The mechanical properties test of gray cast iron parts shall be carried out in accordance with the provisions of JB/T7945. 5 Inspection rules
Gray cast iron parts shall be inspected by the supplier's technical inspection department according to the drawings, relevant design documents and standards. After passing the inspection, they can be put into the warehouse after the primer is applied on the surface. The buyer has the right to conduct re-inspection. The following inspections must be carried out on gray cast iron parts before they leave the factory: a) Mechanical properties:
b) Surface quality;
c) Dimensions and geometric shapes.
Mark and quality certificate
Grey iron castings shall have the manufacturer's mark.
6.2 Grey iron castings shall be accompanied by a quality certificate signed by the inspection department before leaving the factory, which must indicate: a) Manufacturer's name or code:
b) Part name, drawing code and quantity: c) Brand (important castings shall indicate the furnace number); d) Various inspection results;
e) Standard number.
JB/T4328.1-1999
Appendix A
(Standard Appendix)
Dimensional tolerances of grey iron castings
AI The dimensional tolerances of grey iron castings shall comply with the provisions of Table A1 Table A1 Small tolerance values of castings
Basic dimensions of castings
Tolerance grades CT
CTI and CT2 do not specify tolerance values. 2.8
2CT13 to CT16 Small or below 16mm bell its basic size, its tolerance value needs to be marked separately, can be increased by 2-3 levels A2 size less than 10mm gray cast iron size tolerance value should comply with the provisions of Table A2 Table A2 Casting size tolerance value
Basic size of castings
Gray cast iron parts misalignment value should comply with the provisions of Table 3 13
Grade CT
Tolerance grade CT
Note: Misalignment value can be agreed upon by both parties if necessary. JB/T4328.1-1999
Table A3 Misalignment value
Misalignment value mm
Table 1 Table 2 tolerance within
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