JB/T 9104-1999 Technical requirements for ductile iron castings for positive displacement compressors
Some standard content:
1C823.140
Machinery Industry Standard of the People's Republic of China
B9104—1999
Technical Specifications for Spheroidal Graphite Iron Castings of Displacement Compressors
The technical specifications for spheroidal graphite iron castings of displacement compressors1999-07-12 Issued
State Bureau of Machinery Industry
2000-01-01 Implementation
JB/91D4-1999
Cited standards
Technical requirements
4 Test stations
5 Inspection plan
5 Marking and quality certificate
Record holder (Appendix to the standard) Specification for flaw detection of crankshaft and connecting rod (Appendix to the standard 1 Powder flaw detection of crankshaft and connecting rod from 12
JBr910-1559
This standard is a revision of 2B17201688 "Technical conditions for castings for new type presses" 3. Compared with 2D17201688, this standard mainly changes the technical content: "References" chapter adds "learning style", "References" chapter originally cited B[802, JB2854 two standards have been replaced by national standards The main standard is as follows: GE9441-188 Metallographic Inspection of Spherical Cast Iron GB/T113501989 Mechanical Specifications for Castings GR/TH350:1989 Tolerances of Castings This standard replaces ZBJ720168B from the date of implementation. Appendix A and Appendix B of this standard are standard appendices. This standard is proposed and managed by the National Technical Committee for Standardization of Pressing Machines. The drafting unit of this standard is Wuxi Pressing Machine Co., Ltd. The drafters of this standard are Jiang Dingzhong and Ge Yekuan. The standard is used in the following aspects: Mechanical Industry Standard of the People's Republic of China Technical Conditions for Ductile Iron Castings for Positive Displacement Compressors ... This standard specifies the technical requirements, test methods, inspection specifications and marking of volumetric shrinkage castings of displacencntcoapressprsJB/T 9104-1999
ZJ72016-88
This standard specifies the technical requirements, test methods, inspection specifications and marking of volumetric shrinkage castings. This standard is applicable to ordinary low-resistance cast iron made of sand molds or with thermal conductivity equivalent to that of sand molds (hereinafter referred to as replacement parts).
2 Referenced standards
The following standards contain texts that are not applicable in this standard and constitute non-standard texts. At the time of publication of the standard, the versions shown are valid. All published standards are subject to revision. The following standards may be used to determine the possibility of a new version: GB.T 22B...J987 GB.T 23[-1984 GBT134188 Tensile test method Brinell hardness test force method Spheroidal graphite with soft surface roughness comparison specimen sodium surface B6060.115 GB/J6414—1986 GB.T944I1988 GRT 11350. 1989
CR.71135I—189
3 Technical requirements
Dimensional tolerances of castings
Ball machine inspection
Machining allowance of castings
Tolerance of casting weight
3.1 Ball parts shall comply with the requirements of this note and be manufactured according to the drawings and specifications approved by the prescribed procedures. 3.2 Ball casting grades for ball bearings
3.2.! The mechanical properties of spherical titanium parts are graded according to the standard of single casting test, approved by the State Machinery Industry Bureau on July 12, 1999 and implemented on January 1, 2000.
OT8002
Q45-10
OT400-[5
JB/T9104-1999
Minimum medical strength
Minimum tensile strength.
Minimum elongation 6,
Shear hardness
245-335
225~304
19F-269
170--23
160-210
130-180
The grades of mechanical properties of ductile iron parts are graded according to the provisions of Table 2: These grades are suitable for ductile iron parts with a mass equal to or greater than T20003.2.1
kg and a wall thickness of 30-200mm. Table 2
QT700-2A
QT600-3A
QT500L7A
QF[40K)15A
>30~60
>30-60
> 60-.20H)
>30-60
> 60- 200
> 3-60
Minimum tensile strength,
Quantitative strength:
: The letter A is added to the grade and surface, indicating that the mechanical properties are obtained by attaching a test block 1 400
small extension test 5
City acid library
220]-324
180-269
170-240
130-180
3.2.3 The grades for grading ductile iron by the hardness value obtained from the ductile iron body are in accordance with the provisions of Table 3. These grades are suitable for ductile iron parts that only require hardness.
QT-H265
QT-H230
CELHZUU
QT-HI85
Q-[133
City Celsius
24t--335
225-304
190-269
170-21
160-210
130-180
3.3 Chemical composition of iron parts The heat treatment process is determined by the manufacturer. 2
Anaphthalene
Pearlite||Soft body
Iron composite
Spheroidal iron can be used in cast or heat treated sheets. 3.4 Mechanical properties
IR/T9104—1999
4.1 The mechanical properties of ductile iron are based on the tensile strength and elongation of single casting and attached casting test blocks. The results should meet the requirements of Table 1 and Table 2 respectively. The expansion elasticity and ductility can be added for special requirements. 3.4.2 For crankshafts with a diameter greater than 150mm and a mass greater than 400kg, the body sampling can be used and used as the casting test results. 3.4.3 When the hardness grade is selected for the ball parts, the hardness is used as the acceptance basis. The total result should meet the requirements of Table 3. 3.5 Metallographic structure
3. The as-cast spheroidizing grade of spherical titanium parts shall comply with the provisions of Table 4. Table 4
QT-H309
QT800-2
QT-H265
Q1700-2
Q1700-2A
QT-H230
QT600-3
QT600-3A
QT-H200
QT500-7
ST500-7A||tt ||QT-H185
QI450-10
QT-Ht55
QT400-15
QF400-15A
Spheroidal grade
Special body
Linked light fast combined body
Iron nanoparticle
Chenlin North product
3.5.2 The metallographic structure of ductile iron parts (except spheroidizing grade) is not used as the basis for acceptance. If required, it shall comply with the provisions of Table 4. 3.5.3 When selecting ductile iron parts with hardness grading grades, metallographic structure inspection must be carried out in batches when measuring hardness values and shall comply with the provisions of Table 4.
3.6 The geometric shape and size of ductile iron parts shall comply with the drawing requirements, and their dimensional tolerance and misalignment value shall comply with the relevant provisions of G6414. If there are special requirements, please refer to the drawings or relevant technical specifications. For example, the work allowance and weight tolerance shall comply with GB/T11350 and GB/T1135[3.7 Surface quality of ductile iron parts 3.7.! The mold sand, core sand and core bone on the ball parts shall be cleaned. 3.7.2 The pores, scars, burrs, hair clips, oxide scale and sticky sand on the ball parts shall be removed. 3
38 Specification and repair requirements for ductile iron parts JB/T9t04-1999
3., "The rough surface of ductile iron parts shall be free of cold shut, cracks, shrinkage holes, sand, cold sand and other casting defects that affect the performance of the parts: 3.8.2 The diameter, depth and number of pores on the non-original surface of the spherical part shall not exceed the provisions of Table 5. The number of pores within 10m×10cm shall not exceed 2. The pores are the final assembly of the parts. 3.8.3 The surface defects of ductile iron parts within the specified range shall not exist on the surface of the ductile iron parts. 500 mm, etc. > 50-100 mm. 3.4 The diameter, depth and number of pores on the surface of non-critical parts of ductile iron parts shall not exceed the requirements of Table 6. The number of pores within the range of 20 cm × 20 cm shall not exceed 2. Table 6 Pores are not more than 2.
> [5~30
Bore diameter
Bore depth
Gas can be
Or add hole
Distance around the periphery
The center of the rotating part
>500-1000
Number of pores
3.8.5 The main parts of the following ductile iron parts after fine machining shall not have visible grooves and shrinkage holes. Defects such as looseness, sand and rust are allowed to be repaired. No floating is allowed on the friction surface. a) Stainless steel grooves on the reverse flange surface of the cylinder block, air seat, cylinder head and fog holes on the crosshead body; b) Screw holes on the connecting rod body and connecting cover; d) The outer mesh surface and arc transition of the curved spindle, curved pin, and crosshead joint surface: e) The outer circle and inner surface of the combustion rod:
) The cylinder, cylinder sleeve environment:
) The valve chamber fits and seals.
3.6 The reinforcement ribs of the cylinder block, cylinder seat, cylinder head and crosshead castings should not have cracks, and no repairs are allowed. 3.8. Except for the specified parts of 3.S.5 and 3.8.6, if there are defects exceeding the requirements of Table 5 and Table 6, the ductile iron parts should be repaired by removing, welding, drilling, threading, etc. The depth of the defect in the repaired part should not exceed 13 of the thickness of the part where it is located. The spherical group after welding is made to eliminate the danger. 3.9 When the ultrasonic flaw detection
drawing has changes, the requirements for supermarket return should meet the following requirements. 3.9, 1 crankshaft, connected to the internal force of the zone, light Figure 1, the local shaft frequency
a part of the county
T a part of the meaning
a flat position in the Ⅱ zone
Jiang Xiaotou belt surface
3.9.2 Exploration part
a crankshaft crankcase main journal;
VI d,l aarsmt
connecting rod big head certificate
: T this)
ten shafts I have studied
connecting needle big 1 north surface
walk to make up for the head surface
continuous analysis 1 type and
JB/T 9104-1999
h】The crank pin and the main shaft must be located at the crank arm part after processing: the part with the small head added with T
3.9.3 Evaluation of defects
3.9.3.1 There should be no shrinkage holes and cracks inside the crankshaft and connecting rod. 3.9.3.2 Except as specified in 3.9.3.1, if there are other defects in the difference between the two shafts, they should not exceed the requirements of Table 7. Table 8 shows the structural properties of the part where
is located
is smaller than the width and equal to 0% of the surface where the defect is located
is smaller than or equal to the square root of 10% of the surface area where the defect is located
is smaller than or equal to the square root of the entire area of the defect (axial length is greater than or equal to the positive half square root of 20% of the surface area where the defect is located Note: "The surface area where the defect is located is the minimum defect area for detecting defects. 3.9.3.3 Except as provided in 39.3.1, if the connecting rod has other defects, they shall not exceed the requirements of Table 8. Table 8 shows:
is larger than the reporting range and is a linear defect
is smaller than or equal to the reporting range and is a linear defect 10% of the surface area or less than 20% of the area of the defect. The defect recorded is less than or equal to 2D% of the area of the defect. Less than or equal to 30% of the area of the defect. 3.9.3.4 The operator can determine that the defect is exposed after light processing. If the defect exceeds the requirements of the above table, the defect has exceeded the allowable limit of appearance defects and is not allowed to be stored.
3.10 Magnetic particle inspection
3.10.1 Inspection location
Crankshaft crankpin and main journal and the outer surface of the filter: b) The curved surface between the crankpin and the main journal axis after tinning:! The surface of the small head hole of the rod and the processed surface. 3.10.2 Defect classification and level
The defect classification is as specified in Table 9.
Defects
Optical impurities
Magnetic acne reference characteristics
Generally small in shape, with different lengths and different rates of magnetic marks: after removing the magnetic marks, use a 5x magnifying glass: not small dots:
After removing the marks, use a 3x magnifying glass to see strips of different sizes or marks with the same curvature at both ends; the marks are removed, and the 5x magnifying glass can see the outstanding dots:
The low dots can be seen
The shape is strong and the shape is upright.
3.1t.2.2 Defect level see 0 standard
A-type defects are divided into A: A,.A, level;
B-type defects are divided into B,, B..H, two levels,
JR,T9104—1999
Grade-fixing in 15mm×15m
Defect eyebrow length【！ "Excitation
2m(5mm, no more than 5
Srnm<115. No more than 5
Single magnetic wave/r, width less than 1mm
Defect collection area
>5×5-1G × 10
19×10
Company: This table is approved for shaft full or sub-diameter 150mm, other sizes and requirements of workpieces are shown in 3.10.1.3: and above: 3.10.3 Defect Assessment
3.10.3.1C, D: E-type defects and A, B, and E-type defects are not allowed to exist: >1.5mm defect (except A, B, and E-type defects), even if they are invisible with a magnifying glass after removal, are not allowed to exist, 3 .10.3.2 The length of the potential trap 2 is called the A-type magnetic mark and defect length, 1.5mm, the magnetic mark is 5 times the effect of the person who said that this horizontal magnetic mark is not small, as a defect. 3.10.3.3A1A, and the month, day, the class level defect magnetic mark should comply with the sense of the table 10, 3.10.3.4 The length of the relatively large magnetic mark (except for the 4 class load-shaped mark 3: a-
main shaft neck and the orange pin part: the whole cooking direction and the axis line to print ten statues equal to 30°, as a horizontal Directional defect treatment, # part: When the angle between the magnetic mark direction and the direction is greater than or equal to 30°, perform direct defect treatment, b: Connecting rod
defective surface: When the angle between the magnetic mark direction and the axis line of the large and small head holes is less than or equal to 360°, perform transverse treatment,
hole surface: When the angle between the magnetic mark direction and the mother age is less than or equal to 60°, perform direct magnetic mark treatment, 3.10.3.5, the first area of the rod, for A, class level, if in 15mm×15mm fixed The minimum limit of the number of internal magnetic marks is: within the scope of zone 1, for the A-level brake, the 15mm*15mm grading square with only one internal magnetic mark, the minimum limit of the number of marks is: 3.10.3.6 The magnetic mark area in zones 1 and Ⅱ is regarded as a defect in zone 1. 3.14.4 Defect trace quantity 3.104.1 The spacing of the grading square is divided into one category: ≤: >T~5>5(115mm15 mut level shape of the side length) 3.10.4.2 Defect marks AA, horse B, fort a) crankshaft, see Table 11.
I zone a part
T zone a part
JB/T9104—1999 www.bzxz.net
Fast fall avoidance and level of treatment effect
A class
A, level or B, the number of single mature existence of less than ten
A,Grade no more than 1 place
1 grade more than salt
A or B, when it exists alone, it does not exist at 2 places, and grade no more than 1 place
do not compete with grade
A, grade no more than 2 places
A, grade or D, grade no more than 4 places! A, no more than 3 places
, or light single no more than 4 places
In the Ⅱ area, when F exists, grade A, A or B or day, grade: can be calculated according to the relationship between 44, when T, 4H, relative to B. ") In the circumferential distribution of the section, A, short and day pregnancy can exist more than a small leaf "! Place, exist alone no more than 2 places b) connecting rod, table 12.
Small head
Big head
Big head
3.10.4.3 Consider the conversion of r. piece hours. The number of links and levels is missing.
A, or B, when they exist alone, no more than 1 time interval: level H, when they exist at the same time in the hospital, more than ten places: Oh, when they do not exist alone
interval: level A, B, when they want to exist at the same time, no more than 1, when, or H, when they exist alone, no more than 2 a) The original and pile measurement size of 1 piece, the fixed load stop surface is converted by the above formula: (=x()
I: -
The converted graded positive sequence shape side length, mm: L-15mmx15mm graded square note length, mm: K. Conversion coefficient of the graded square area of Class A defects: - Conversion coefficient of the graded square area of Class B defects; K
K (or k).
4 Basic family value: 150mm:
-The diameter of the crankshaft being inspected or the hole diameter at the connecting rod head, mmb】The conversion of the number of Class A defects is shown in Table [38
JB/T9104 —1999
In the graded square sample for avoiding dangerous defects
2mm<[ssmm, more than 1,×) pieces
5mm10mm, more than (k,x5) pieces
The number is converted to an integer
1) In the reported number, if the first digit after the decimal point is less than 5 (excluding,), it is excluded; if it is greater than or equal to 5, it is rounded up by 1 and the printed individual number is added
3.11 Compared with other surface flaws
In addition to using 3.10 light flaw detection for ductile iron, other detection methods can also be used to inspect its surface defects. 4 Test Methods
4. Test Preparation
4.1.1 Before the test block is tested, the test piece should be the same as the batch of parts and the test piece should be the same as the batch of parts. The test piece should be the same as the batch of parts and the test piece should be the same as the batch of parts. The test piece should be the same as the batch of parts. The test piece should be the same as the batch of parts. The test piece should be the same as the batch of parts. The test piece should be the same as the batch of parts. The test piece should be the same as the batch of parts. The test piece should be the same as the batch of parts. The test piece should be the same as the batch of parts. The test piece should be the same as the batch of parts. 18G
Figure 2U type single casting test block
Table 4U type single casting test size
Note: The sand content of the test piece is 40mm for the model a, the minimum is 80mm50 for the model b.
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