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Wire for quenched and tempered springs
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Detail Information of GB/T 18983-2017; GB/T18983-2017
Description (Translated English): Wire for quenched and tempered springs
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H49
Classification of International Standard: 77.140.65
Word Count Estimation: 12,115
Date of Issue: 2017-07-12
Date of Implementation: 2018-04-01
Older Standard (superseded by this standard): GB/T 18983-2003
Quoted Standard: GB/T 222; GB/T 223.5; GB/T 223.11; GB/T 223.13; GB/T 223.19; GB/T 223.58; GB/T 223.59; GB/T 223.60; GB/T 223.68; GB/T 223.69; GB/T 224; GB/T 228.1; GB/T 232; GB/T 239.1; GB/T 239.2; GB/T 2103; GB/T 2976; GB/T 4336; GB/T 10561; GB/T 13298; GB/T 20123
Adopted Standard: ISO 8458-3-2002, NEQ
Drafting Organization: Sinopec Group Zhengzhou Metal Products Research Institute Co., Ltd., Tianjin Metallurgical Group Zhongxing Shengda Steel Industry Co., Ltd., Guangzhou Olympic Rubber Technology Co., Ltd., Baosteel Group Nantong Wire Products Co., Ltd., Jiangsu Shenwang Group Cable Co., Ltd., Steel Co., Ltd., Metallurgical Industry Information Standards Institute
Administrative Organization: National Steel Standardization Technical Committee (SAT / TC 183)
Proposing organization: China Iron and Steel Industry Association
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee
Summary: This standard specifies the classification and order, order, diameter, shape and tolerances, manufacturing methods, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of quenched and tempered spring wire (hereinafter referred to as steel wire). This standard applies to the manufacture of various mechanical springs with carbon and low alloy quenched one - tempered round section steel wire.
GB/T 18983-2017
Wire for quenched and tempered springs
ICS 77.140.65
H49
National Standards of People's Republic of China
Replacing GB/T 18983-2003
Quenching-tempering spring wire
(ISO 8458-3.2002, Steelwireformechanicalsprings-
Part 3. Oil-hardenedandtemperedwire,NEQ)
Published on.2017-07-12
2018-04-01 Implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 18983-2003 "oil quenching - tempering spring steel wire." Major changes compared to GB/T 18983-2003
as follows.
--- Added "GB/T 4336, GB/T 13298, GB/T 20123, GB/T 20125" in the normative references;
---In the classification and code, the "ultra-high intensity" level has been added;
--- Modify the diameter range;
--- Chemical components added to the composition of the new categories TDSiCr-B, TDSiCr-C and VDSiCrV;
--- Modify the "surface decarburization allow maximum depth";
The mechanical properties of TDSiCr-B and TDSiCr-C were increased in the "mechanical performance of static grade and medium fatigue grade steel wire".
--- "Mechanical properties of high fatigue grade steel wire" increased the mechanical properties of VDSiCrV;
--- Modified "allowable maximum depth of surface defects" and added description of the acid leaching test method.
This section uses the redrafted law reference ISO 8458-3.2002 "mechanical spring wire Part 3. oil quenching - tempered wire" preparation,
The degree of consistency with ISO 8458-3.2002 is not equivalent.
This standard is proposed by the China Iron and Steel Industry Association.
This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAT/TC183).
This standard was drafted by. Sinosteel Zhengzhou Metal Products Research Institute Co., Ltd., Tianjin Metallurgical Group Zhongxing Shengda Steel Industry Co., Ltd.,
Guangzhou Olympic Steel Wire Technology Co., Ltd., Baosteel Group Nantong Wire Products Co., Ltd., Jiangsu Shenwang Group Steel Cable Co., Ltd., and Taibo Group
Steel Co., Ltd., Metallurgical Industry Information Standards Institute.
The main drafters of this standard. Zhang Fengshan, Jiang Ling, Zhang Yongbo, Xing Xianqiang, Yan Xiuyan, Zhou Jianhua, Ren Cuiying, Wang Lingjun, Huang Jianming,
Wang Wenxi, Zhang Jun, Meng Zhaoxian, Zhang Honglong, Cui Tongquan, Zhang Weidong, Li Changchun, Li Lighting, Zhang Xiaoguang.
The previous versions of the standards replaced by this standard are.
--- GB/T 18983-2003.
Quenching-tempering spring wire
1 Scope
This standard specifies the classification and code number, ordering content, diameter, shape and allowable deviation of quenched-tempered spring steel wire (hereinafter abbreviated as steel wire).
Poor, manufacturing methods, technical requirements, test methods, inspection rules, packaging, markings, and quality certificates.
This standard applies to the manufacture of a variety of mechanical spring carbon and low alloy quenched - tempered circular section wire.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 222 steel chemical analysis sample sampling method and finished product chemical composition allowable deviation
GB/T 223.5 Determination of acid-soluble silicon and total silicon content in steels-Reduced molybdosilicate spectrophotometric method
GB/T 223.11 Determination of chromium content in steels and alloys Visual titration or potentiometric titration
GB/T 223.13 Methods for chemical analysis of iron, steel and alloy. Ammonium ferrous sulfate titration method for the determination of vanadium content
GB/T 223.19 Methods for chemical analysis of iron, steel and alloy - The neocuproine-chloroform extraction photometric method for the determination of copper content
GB/T 223.58 Methods for chemical analysis of iron, steel and alloy. The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
GB/T 223.59 Determination of phosphorus content in steels and alloys - Phosphomolybdate blue spectrophotometric method and antimony-molybdenum blue spectrophotometric method
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy. Perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.68 Methods for chemical analysis of iron, steel and alloy - The potassium iodate titration method for the determination of sulfur after combustion in a tubular furnace
GB/T 223.69 Determination of carbon content in steel and alloys
Decarburized Depth Determination Method for GB/T 224 Steel
GB/T 228.1 Tensile test of metallic materials Part 1. Test method at room temperature
GB/T 232 bending test method for metallic materials
GB/T 239.1 Wires - Part 1. One-way torsion test method
GB/T 239.2 Metallic wire - Part 2. Bidirectional torsion test method
GB/T 2103 General requirements for wire acceptance, packaging, marking and quality certification
GB/T 2976 wire rod winding test method
GB/T 4336 Determination of multi-element content of carbon steels and low-alloy steels by spark discharge atomic emission spectrometry (conventional method)
Microscopic Evaluation Method of Non-metallic Inclusions in GB/T 10561 Steel
GB/T 13298 metal microstructure inspection method
GB/T 20123 Determination of Total Carbon and Sulfur Content in Iron and Steel, Infrared Absorption after Combustion in High Frequency Induction Furnace (Conventional Method)
GB/T 20125 Determination of multi-element content of low-alloy steels by inductively coupled plasma emission spectrometry
3 Classifications and Codes
3.1 Classification
3.1.1 The steel wire is divided into static, medium fatigue and high fatigue according to the working conditions.
3.1.2 Steel wire is divided into three levels of low strength, medium strength and high strength according to the tensile strength of the supplier.
3.2 Code
The classification, code number and diameter range of steel wire are shown in Table 1.
3.3 Tag Examples
The 3.0mm diameter VDSiCr grade steel wire is marked as.
VDSiCr-3.0-GB/T 18983.
Table 1 Classification, code number and diameter range of steel wire
Classification Static Class Fatigue Class a Fatigue Class
tensile strength
Low intensity
Medium strength
high strength
Ultra high strength
FDC
FDCrV, FDSiMn
FDSiCr
TDC
TDSiMn
TDSiCr-A
TDSiCr-B, TDSiCr-C
VDC
VDCrV
VDSiCr
VDSiCrV
Diameter range 0.50mm~18.00mm 0.50mm~18.00mma 0.50mm~10.00mm
Note 1. Static grade wire is suitable for general purpose springs and is represented by FD.
Note 2. Mid-fatigue grade steel wire is used for general strength clutch springs, suspension springs, etc. and is represented by TD.
Note 3. High-fatigue grade steel wire is suitable for use in violent sports applications, such as valve springs, represented by VD.
a TDSiCr-B and TDSiCr-C diameters range from 8.0mm to 18.0mm.
4 Order contents
Contracts or orders placed under this standard should include the following.
a) this standard number;
b) product name;
c) brand number;
d) Product specifications and quantity;
e) delivery form and unit weight;
f) Valve wire should indicate the level of non-metallic inclusions;
g) Special requirements.
5 Diameter, shape and tolerance
5.1 Diameter
5.1.1 Wire diameter and allowable deviation shall comply with the provisions of Table 2. When the demand side has special requirements for diameter deviation, it should be specified in the contract.
5.1.2 The roundness of steel wire shall not be greater than half of the nominal diameter tolerance.
5.2 Shape
The shape of the steel wire should be regular and there must be no bending that will affect its use.
Table 2 wire diameter and allowable deviation in millimeters
Nominal diameter
Allowable deviation, ±
TD VD FD
Nominal diameter
Allowable deviation, ±
TD VD FD
0.50~0.80 0.010 0.015 >5.50~7.00 0.040
>0.80~1.00 0.015 0.020 >7.00~9.00 0.045
>1.00~1.80 0.020 0.025 >9.00~10.00 0.050
>1.80~2.80 0.025 0.030 >10.00~11.00 0.070 -
> 2.80~4.00 0.030 >11.00~14.50 0.080 -
>4.00~5.50 0.035 >14.50~18.00 0.090 -
6 manufacturing methods
The steel wire is cold-drawn from the wire rod and quenched and tempered. Ultra-high-strength VDSiCrV steel wire should be stripped and flaw-detected.
7 Technical Requirements
7.1 Chemical composition
7.1.1 The chemical composition (smelting analysis) of steel for steel wire should meet the requirements in Table 3. The commonly used steel brands in China refer to Table A.1.
7.1.2 According to the requirements of the buyer, after agreement between the supplier and the buyer and in the contract, he can supply other steel wires.
7.1.3 The allowable deviation of the chemical composition of wire rods for steel wire shall comply with the relevant provisions of GB/T 222.
Table 3 Chemical Composition %
Code C Si Mn PS Cr V Ni Cua
FDC
TDC
VDC
0.60~0.75 0.17~0.37 0.90~1.20 ≤0.030 ≤0.030 ≤0.25 - ≤0.35 ≤0.25
FDCrV
TDCrV
VDCrV
0.46~0.54 0.17~0.37 0.50~0.80 ≤0.025 ≤0.020 0.80~1.10 0.10~0.20 ≤0.35 ≤0.25
FDSiMn
TDSiMn
0.56~0.64 1.50~2.00 0.70~1.00 ≤0.025 ≤0.020 - - ≤0.35 ≤0.25
FDSiCr
TDSiCr
VDSiCr
0.51~0.59 1.20~1.60 0.50~0.80 ≤0.025 ≤0.020 0.50~0.80 - ≤0.35 ≤0.25
VDSiCrV 0.62~0.70 1.20~1.60 0.50~0.80 ≤0.025 ≤0.020 0.50~0.80 0.10~0.20 ≤0.035 ≤0.12
a The copper content of TD grade and VD grade steel wire should be less than 0.12%.
7.2 Surface decarburization
The surface of the steel wire must not have a full decarburization layer, and the decarburized layer can have a depth of not more than 1.0% d and a maximum of 0.15 mm.
7.3 Non-metallic inclusions
The steel wire shall be tested for non-metallic inclusions, and the level of conformity shall be negotiated by both parties and specified in the contract;
Party OK.
7.4 Microstructure
The microstructure of the wire should be tempered troostite.
7.5 Mechanical Properties
7.5.1 The tensile strength and reduction of area of the steel wire shall comply with the requirements of Table 4 and Table 5.
Table 4 Mechanical properties of static grade and medium fatigue steel wire
Diameter range/mm
Tensile strength Rm/MPa
rate of reduction in area
Za/%
FDC
TDC
FDCrV-A
TDCrV-A
FDSiMn
TDSiMn
FDSiCr
TDSiCr-A
TDSiCr-B TDSiCr-C FD TD
0.50~0.80 1800~21001800~21001850~21002000~2250 - - -
>0.80~1.00 1800~20601780~20801850~21002000~2250 - - -
>1.00~1.30 1800~20101750~20101850~21002000~2250 - - 45 45
>1.30~1.40 1750~19501750~19901850~21002000~2250 - - 45 45
>1.40~1.60 1740~18901710~19501850~21002000~2250 - - 45 45
>1.60~2.00 1720~18901710~18901820~20002000~2250 - - 45 45
>2.00~2.50 1670~18201670~18301800~19501970~2140 - - 45 45
>2.50 to 2.70 1640~17901660~18201780~19301950~2120 - - 45 45
> 2.70~3.00 1620~17701630~17801760~19101930~2100 - - 45 45
> 3.00~3.20 1600~17501610~17601740~18901910~2080 - - 40 45
>3.20~3.50 1580~17301600~17501720~18701900~2060 - - 40 45
>3.50 to 4.00 1550~17001560~17101710~18601870~2030 - - 40 45
>4.00 to 4.20 1540~16901540~16901700~18501860~2020 - - 40 45
>4.20 to 4.50 1520~16701520~16701690~18401850~2000 - - 40 45
>4.50 to 4.70 1510~16601510~16601680~18301840~1990 - - 40 45
>4.70~5.00 1500~16501500~16501670~18201830~1980 - - 40 45
>5.00~5.60 1470~16201460~16101660~18101800~1950 - - 35 40
>5.60~6.00 1460~16101440~15901650~18001780~1930 - - 35 40
Table 4 (continued)
Diameter range/mm
Tensile strength Rm/MPa
rate of reduction in area
Za/%
FDC
TDC
FDCrV-A
TDCrV-A
FDSiMn
TDSiMn
FDSiCr
TDSiCr-A
TDSiCr-B TDSiCr-C FD TD
>6.00~6.50 1440~15901420~15701640~17901760~1910 - - 35 40
>6.50 to 7.00 1430~15801400~15501630~17801740~1890 - - 35 40
>7.00~8.00 1400~15501380~15301620~17701710~1860 - - 35 40
> 8.00~9.00 1380~15301370~15201610~17601700~18501750~18501850~1950 30 35
> 9.00~10.00 1360~15101350~15001600~17501660~18101750~18501850~1950 30 35
>10.00~12.00 1320~14701320~14701580~17301660~18101750~18501850~1950 30 35
>12.00~14.00 1280~14301300~14501560~17101620~17701750~18501850~1950 30 35
>14.00~15.00 1270~14201290~14401550~17001620~17701750~18501850~1950 30 35
>15.00~17.00 1250~14001270~14201540~16901580~17301750~18501850~1950 30 35
a FDSiMn and TDSiMn when the diameter is less than 5.00mm, Z≥35%; when the diameter is greater than 5.00mm~14.00mm, Z≥30%.
Table 5 Mechanical properties of highly fatigued steel wire
Diameter range/mm
Tensile strength Rm/MPa
VDC VDCrV-A VDSiCr VDSiCrV
Reduction of area Z/%
0.50~0.80 1700~2000 1750~1950 2080~2230 2230~2380 -
>0.80~1.00 1700~1950 1730~1930 2080~2230 2230~2380 -
>1.00~1.30 1700~1900 1700~1900 2080~2230 2230~2380 45
>1.30~1.40 1700~1850 1680~1860 2080~2230 2210~2360 45
>1.40~1.60 1670~1820 1660~1860 2050~2180 2210~2360 45
>1.60~2.00 1650~1800 1640~1800.2010~2110 2160~2310 45
>2.00 to 2.50 1630~1780 1620~1770 1960~2060 2100~2250 45
> 2.50~2.70 1610~1760 1610~1760 1940~2040 2060~2210 45
> 2.70~3.00 1590~1740 1600~1750 1930~2030 2060~2210 45
> 3.00~3.20 1570~1720 1580~1730 1920~2020 2060~2210 45
>3.20~3.50 1550~1700 1560~1710 1910~2010.2010~2160 45
>3.50 to 4.00 1530~1680 1540~1690 1890~1990.2010~2160 45
>4.00~4.20 1510~1660 1520~1670 1860~1960 1960~2110 45
>4.20 to 4.50 1510~1660 1520~1670 1860~1960 1960~2110 45
Table 5 (continued)
Diameter range/mm
Tensile strength Rm/MPa
VDC VDCrV-A VDSiCr VDSiCrV
Reduction of area Z/%
>4.50 to 4.70 1490~1640 1500~1650 1830~1930 1960~2110 45
>4.70~5.00 1490~1640 1500~1650 1830~1930 1960~2110 45
> 5.00~5.60 1470~1620 1480~1630 1800~1900 1910~2060 40
>5.60~6.00 1450~1600 1470~1620 1790~1890 1910~2060 40
>6.00~6.50 1420~1570 1440~1590 1760~1860 1910~2060 40
>6.50 to 7.00 1400~1550 1420~1570 1740~1840 1860~2010 40
>7.00~8.00 1370~1520 1410~1560 1710~1810 1860~2010 40
>8.00~9.00 1350~1500 1390~1540 1690~1790 1810~1960 35
> 9.00~10.00 1340~1490 1370~1520 1670~1770 1810~1960 35
7.5.2 Wires with a nominal diameter greater than 1.00mm shall be measured for reduction of area.
7.5.3 Through the agreement, other tensile strength control ranges may also be used for the steel wire.
7.5.4 The allowable fluctuation range of the tensile strength of steel wire in a plate or a shaft is.
a) VD steel wire should not exceed 50 MPa;
b) TD steel wire should not exceed 60 MPa;
c) FD steel wire should not exceed 70 MPa.
7.6 Process Performance
7.6.1 Winding test
Winding test requirements are as follows.
a) Wires with a nominal diameter of less than 3.00mm shall be wounded and the wire surface shall not be cracked or broken after the test;
b) The wire is wound on the mandrel for at least 4 turns;
c) The mandrel diameter is equal to the wire diameter.
7.6.2 Torsion Test
Torsional test requirements are as follows.
a) Torsional test shall be performed on steel wire with a nominal diameter of 0.70mm~6.00mm;
b) The gauge length of the specimen is 100 times the diameter of the wire. By agreement, other gauge lengths are allowed;
c) There are two test methods.
1) One-way torsion test means that the specimen is twisted in one direction at least 3 times until it breaks, and the fracture should be flush;
2) Two-way torsion test method is also available for TD grade and VD grade steel wire and should meet the requirements of Table 6.
Table 6 Bidirectional Torsion Test Requirements
Nominal diameter
Mm
TDC VDC
Right turn, left turn
TDCrV VDCrV
Right turn, left turn
TDSiCr VDSiCr VDSiCrV
Right turn, left turn
>0.70~1.00
>1.00~1.60
>1.60~2.50
> 2.50~3.00
> 3.00~3.50
>3.50 to 4.50
>4.50 to 5.60
>5.60~6.00
7.6.3 Bend test
The bending test requires the following.
a) Wires with a nominal diameter greater than 6.00mm should be subjected to bending tests;
b) The wire is bent 90° around a mandrel with a diameter equal to 2 times the diameter of the wire. After the test, the surface of the wire must not be cracked or broken.
7.6.4 Winding test
According to the requirements of the buyer, a steel wire with a nominal diameter of not more than 0.70 mm can be wound.
The winding test specimen is about 500 mm long and is evenly wound around the mandrel. The diameter of the mandrel is 3 times the nominal diameter of the steel.
3.5 times. Remove the wound coil from the mandrel and stretch it so that after release, it is about 3 times the original length of the coil. In this case
The coil pitch and ring diameter should be uniform.
7.7 Surface quality
7.7.1 The surface of steel wire should be smooth and there should be no defects such as cracks, folds, scabs, and continuous pockmarks; minor scratches, pits, and other types should be allowed.
Defects, but their depth should meet the requirements of Table 7.
Table 7 Maximum Depth Allowed for Surface Defects
Wire diameter d/mm FD TD VD
0.50~2.00 0.02mm 0.015mm 0.01mm
>2.00~6.00 1.0%d 0.8%d 0.5%d
>6.00~8.00 1.2%d 1.0%d 0.6%d
>8.00 0.10mm 0.08mm 0.06mm
7.7.2 The surface quality of steel wire shall be inspected by acid leaching. There shall be no processing stress in the sample used for acid leaching inspection. Using acid leaching, will eliminate
The cold sample except for the stress was immersed in a solution of boiled, industrial concentrated hydrochloric acid to water in a volume ratio of 1.1 in about.200 mm and a decrease in diameter of about 1%.
The acid leaching is stopped after the pitting has not occurred, and the defects are checked. If necessary, a 10x magnifying glass can be used.
7.8 flaw detection
Ultra-high-strength steel wire should be subjected to eddy current testing. The depth of detection and the number of detection marks are negotiated between the supplier and the buyer. When the buyer needs no special request,
Determine the depth of detection and the number of markers. Wire strength inspections of other strength levels shall be determined through consultation between the supply and demand sides.
7.9 Special Requirements
According to the requirements of the buyer, the buyer and the buyer may negotiate and request other special requirements and indicate in the contract.
8 Test methods
Wire test items, sampling quantities and test methods are performed according to Table 8.
Table 8 Inspection items, number of samples and test methods
No. Inspection Item Sampling Quantity and Location Test Method
1 Diameter and shape per disc (axis) Micrometer, visual
2 Chemical composition 1, wire rod sampling GB/T 223
3 Decarburization layer 10% at one end (at least 1) GB/T 224
4 Non-metallic inclusions 10% at one end of each lot (at least 1) Wire rod sampling GB/T 10561
5 Microscopic Organization 10% Each End (At Least One) GB/T 13298
6 Tensile strength 10% per batch (at least 2) GB/T 228.1
7 Reduction in area per batch of 10% 2 (at least 2) GB/T 228.1
8 Winding each batch of 10% two-terminal (at least 2) GB/T 2976
9 Reverse each batch of 10% of one end (at least 1) GB/T 239.1, GB/T 239.1 and Table 6
10 Bend 10% of each batch of one end (at least 1) GB/T 232
11 Winding each batch of 10% of one end (at least 1) See 7.6.4
12 The surface quality is acid leached at each end of each plate or end of each axis, see 7.7.2
9 Inspection Rules
9.1 Inspection and Acceptance
9.1.1 Inspection of steel wire shall be conducted by the supplier quality and technical supervision department.
9.1.2 The supplier shall ensure that the delivered steel wire meets the requirements of this standard or the contract. When necessary, the acquirer has the right to the provisions of this standard or contract
A test item is checked.
9.1.3 Wires with eddy current t......
Related standard: GB/T 12756-2018 |