GB/T 37569-2019 English PDF

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GB/T 37569-2019: Copper alloy rod for die forgings (hot-pressed)
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GB/T 37569-2019	439	Add to Cart	4 days	Copper alloy rod for die forgings (hot-pressed)	Valid

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Basic data

Standard ID: GB/T 37569-2019 (GB/T37569-2019)
Description (Translated English): Copper alloy rod for die forgings (hot-pressed)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H62
Classification of International Standard: 77.150.30
Word Count Estimation: 22,299
Date of Issue: 2019-06-04
Date of Implementation: 2020-05-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 37569-2019: Copper alloy rod for die forgings (hot-pressed)

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Copper alloy rod for die forgings (hot-pressed) ICS 77.150.30 H62 National Standards of People's Republic of China Copper alloy rod for hot die forging Published on.2019-06-04 2020-05-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Nonferrous Metals Industry Association. This standard is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243). This standard was drafted. Ningbo Zhenzhen Copper Industry Co., Ltd., Zhejiang Metallurgical Product Quality Inspection Station Co., Ltd., Shaoxing Quality Technology Supervised Testing Institute, Nonferrous Metals Technology and Economic Research Institute. The main drafters of this standard. Guo Shumei, Song Kadi, Du Xiyong, Kong Shuilong, Han Zhiwei, Li Zhiguo, Liu Xinkuan, Shi Lixia, Yang Dongchao, Huang Teng, Chen Yonggang, Li Minghua, Qian Xiaodong, Yu Ximeng, Jiang Yichuan, Nie Qingyou. Copper alloy rod for hot die forging

1 Scope

This standard specifies the technical requirements, test methods, inspection rules and signs, packaging, transportation, storage and quality certificates of copper alloy rods for hot forging. The contents of the book and the order form (or contract). This standard applies to round alloy rods for hot die forging (hereinafter referred to as bars).

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 edition (including all amendments) applies to this document. GB/T 230.1 Rockwell hardness test for metallic materials - Part 1. Test methods GB/T 231.1 Brinell hardness test for metallic materials - Part 1. Test methods GB/T 2828.1. Sampling procedures for sampling by sampling - Part 1 . Batch-to-batch sampling plan, searched by AQL GB/T 3310 copper and copper alloy bar ultrasonic testing method GB/T 4340.1 Metallic materials - Vickers hardness test - Part 1. Test method GB/T 5121 (all parts) Copper and copper alloy chemical analysis methods GB/T 5231 processing copper and copper alloy grades and chemical composition GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values GB/T 8888 heavy non-ferrous metal processing products packaging, marking, transportation, storage and quality certificate GB/T 10119 Determination of resistance to dezincification corrosion of brass GB/T 10567.1 Copper and copper alloys - Determination of residual stress - Test method GB/T 10567.2 Copper and copper alloys - Residual stress test method - Ammonia test method GB/T 26303.2 Methods of measuring the dimensions of copper and copper alloys - Part 2. bars, wires, profiles GB/T 34505-2017 Copper and copper alloy materials tensile test method at room temperature YS/T 336 copper, nickel and its alloy pipes and bars fracture test method YS/T 448 copper and copper alloy casting and processing products macroscopic inspection method YS/T 482 Copper and copper alloys - Methods YS/T 483 copper and copper alloy analysis method X-ray fluorescence spectrometry (wavelength dispersion type) YS/T 668 copper and copper alloy physical and chemical detection sampling method

3 Technical requirements

3.1 Product Classification 3.1.1 Grade, code, status and specifications The grade, code, status and specifications of the bar shall comply with the requirements of Table 1. Table 1 Product grades, codes, status and specifications Note 1. Other constituent alloys may also be provided upon negotiation between the supplier and the buyer. Note 2. Appendix A lists the grades corresponding to foreign standards. a state M30 (extrusion), H50 (hot extrusion drawing), HR50 (pull stress relief), H02 (1/2 hard), HR02 (1/2 hard stress relief), M07 (continuous casting), the bar blank in the M07 state can be surface-peeled. b Bars with a diameter of 10mm~50mm, lengths from 1000mm to 6000mm; bars with a diameter of >50mm~80mm, length 500mm~4500mm; bars with a diameter larger than 80mm, the length is 500mm~3000mm. 3.1.2 Product Marking Product marks are expressed in the order of product name, standard number, grade, status, accuracy level, and specification. Examples of tags are as follows. Example 1. A round bar made of HPb59-1 (T38100), HR50 state, high precision, diameter 35mm, length 3000mm, marked as. Bar GB/T 37569-HPb59-1HR50 high-φ35×3000 Or bar GB/T 37569-T38100HR50 high - φ35 × 3000 Example 2. A round bar made of H58 (T28400), HR50 state, normal grade, 35 mm in diameter and 3000 mm in length, marked as. Bar GB/T 37569-H58HR50-φ35×3000 Or bar GB/T 37569-T28400HR50-φ35×3000 3.2 Chemical composition Grades H62.5, H58, HPb59-2(I), HPb59-1.8, HPb58-2(I), HSn60-0.8, HSn60-0.8-0.04, HSn61- The chemical composition of 0.8-1.8, HBi62-1.4-1, QAl10-5-3 bars shall comply with the requirements of Table 2, and the chemical composition of other grades shall comply with GB/T 5231 provisions. 3.3 Dimensions and their tolerances 3.3.1 Diameter and its allowable deviation The diameter of the M30 (hot extrusion) state bar and its allowable deviation shall comply with the requirements of Table 3; H50 (hot extrusion drawing) state, HR50 (pull stress relief), H02 (1/2 hard) state, HR02 (1/2 hard stress relief) state, the diameter of the bar and its allowable deviation should be consistent with The provisions of Table 4; M07 (continuously cast bar blanks through surface processing) state of the diameter of the bar and its allowable deviation should meet the requirements of Table 5. through Bars of other specifications and tolerances may also be supplied for consultation between the supplier and the buyer. Table 3 M30 state bar diameter and its allowable deviation unit is mm a When the allowable deviation is all positive ( ) or all negative (-) one-way deviation, its value is twice the corresponding value in the table. Table 4 H50, HR50, H02 and HR02 status bar diameter and its allowable deviation unit is mm >50~80 ±0.10 ±0.12 a When the allowable deviation is all positive ( ) or all negative (-) one-way deviation, its value is twice the corresponding value in the table. Table 5 M07 state bar diameter and its allowable deviation unit is mm Note. The table indicates the allowable deviation of the diameter of the M07 state bar through surface peeling. If the M07 state bar is not subjected to surface peeling, its diameter allows The deviation is determined by negotiation between the supplier and the buyer. a When the allowable deviation is all ( ) or (-) one-way deviation, its value is twice the corresponding value in the table. 3.3.2 Roundness The roundness of the bar should be no more than half of the allowable deviation of the diameter. 3.3.3 length 3.3.3.1 The length or length of the bar shall be within the length of the indefinite length. The allowable deviation of the length or length of the bar is 10mm. The length of the double ruler should be added to the sawing amount when sawing the segment. The sawing amount of each segment should be 5mm. 3.3.3.2 Bars with a diameter greater than 40 mm are allowed to have short-length products. The proportion of short-length products should be less than 10%, and the length of short-length products should not be less than 70% of the length of the fixed length, and meet the multiple requirements. 3.3.4 straightness The straightness of bars with a diameter of not more than 80 mm shall comply with the requirements of Table 6. When the diameter of the bar is greater than 80mm, the straightness is determined by negotiation between the supplier and the buyer. Table 6 Straightness of bars 3.3.5 chamfering and chamfering 3.3.5.1 Chamfering The ends of the brass bars can be chamfered, and the number of inverted angles is determined by the supplier and the buyer. 3.3.5.2 Cutting slope The end of the bar shall be sawed and leveled, and the maximum amount of cut shall not exceed the diameter of the bar without causing the length of the bar to exceed the allowable deviation. 2.5%. 3.4 Mechanical properties The longitudinal mechanical properties of the bar at room temperature are to comply with the requirements of Table 7. Table 7 Longitudinal mechanical properties of bars at room temperature Note. Appendix B gives the recommended copper alloy forging temperatures and relative forgeability for design and user reference. a Hardness is Rockwell hardness HRB. 3.5 Fracture The fracture of the bar product shall be dense, without shrinkage, allowing slight, individual pores, inclusions and delamination, and the permissible defects shall comply with the requirements of Table 8. Table 8 Defects allowed by the fracture 3.6 end face low magnification organization The cross-section (end surface) of the bar should be evenly distributed, and the average size difference between the small grain area and the large grain area observed in the low-magnification metal phase is not more than 2.5. Double (not including M07 status). 3.7 Ultrasonic flaw detection The bar can be ultrasonically inspected according to the provisions of GB/T 3310, and the flaw detection result should be qualified. 3.8 residual stress Bars can be tested for residual stress and the test results should be free of visible cracks. 3.9 Dezincification resistance Bars of HSn60-0.8-0.04 and HSi75-3 can be tested for dezincification resistance, and their performance should meet the requirements of Table 9. Table 9 Dezincification resistance of bars Dezincification layer depth/μm M07 (continuous casting rod) M30, H50, H02, HR02 Horizontal landscape portrait portrait ≤100 ≤100 ≤100 ≤300 3.10 Surface quality 3.10.1 The surface of the bar should be smooth and clean. Allows for slight discoloration due to stretch lubrication or stress relief annealing, and does not exceed Straightening marks within the tolerance range shall be free from defects such as cracks, peeling, air bubbles and inclusions. 3.10.2 Surface-debarred M07-state bars are allowed to have processing marks that do not affect the use.

4 Test methods

4.1 Chemical composition The chemical composition analysis method of the bar is carried out according to GB/T 5121 (all parts) or YS/T 482 or YS/T 483. The analysis is carried out in accordance with the provisions of GB/T 5121 (all parts). 4.2 Dimensions and their tolerances The measuring method of the dimensions of the bar is carried out in accordance with the provisions of GB/T 26303.2. 4.3 Mechanical properties 4.3.1 Tensile test at room temperature The room temperature tensile test method of the bar is carried out in accordance with the provisions of GB/T 34505-2017. 8mm~12.5mm aluminum bronze bar The tensile specimen type can also be selected from R3 and R03. The tensile specimen type of other alloy bars is according to 5.3.3 of GB/T 34505-2017. The selection of the rules. 4.3.2 Hardness test The Vickers hardness test method for bars is carried out in accordance with the provisions of GB/T 4340.1. Brinell hardness test method for bars according to GB/T 231.1 The regulations are carried out. The Rockwell hardness test method for bars is carried out in accordance with GB/T 230.1. 4.4 Fracture The method of testing the fracture of the bar is carried out in accordance with the provisions of YS/T 336. 4.5 end face low magnification The low-density tissue inspection method of the bar is carried out in accordance with the provisions of YS/T 448. 4.6 Ultrasonic flaw detection Ultrasonic flaw detection of bars shall be carried out in accordance with GB/T 3310. 4.7 residual stress The residual stress test of the bar is carried out in accordance with the provisions of GB/T 10567.2. Bronze bar material is subject to the provisions of GB/T 10567.1 during arbitration get on. 4.8 Dezincification resistance The method for detecting the dezincification resistance of bars is carried out in accordance with the provisions of GB/T 10119. 4.9 Surface quality The surface quality of the bar is visually inspected. Note. Appendix C gives the test method for the relative forgeability of copper alloys for reference when evaluating the relative forgeability of copper alloys.

5 Inspection rules

5.1 Inspection and acceptance 5.1.1 The bar should be inspected by the supplier to ensure that the product quality meets the requirements of this standard and the order form (or contract), and fill in the quality certificate. Book. 5.1.2 The purchaser shall inspect the products received in accordance with the provisions of this standard, such as the inspection results and the provisions of this standard and the order form (or contract). In case of discrepancy, it shall be submitted to the supplier in writing and shall be settled by negotiation between the supplier and the buyer. Objections that are subject to surface quality and dimensional deviation should be received The objection to other performance within one month from the date of the product shall be filed within three months from the date of receipt of the product. Arbitration, arbitration Sampling should be carried out jointly by both the supplier and the buyer. 5.2 Batch Bars shall be submitted for inspection in batches. Each batch shall consist of bars of the same grade, condition and specification, and the weight of each batch shall not exceed 5000 kg. 5.3 Inspection items 5.3.1 Each batch of bar shall be tested for chemical composition, dimensions and tolerances, fractures and surface quality. 5.3.2 Each batch of bar should be tested for mechanical properties, hardness test and tensile test. If it is not specified in the contract, perform hardness test. Test. When selecting the hardness test, if the demander also requires the tensile test and indicates in the contract, the tensile test and tensile test result should also be carried out. For reference only; when the tensile test is selected, if the demander also requires a hardness test and is indicated in the contract, the hardness test and hardness test shall also be carried out. The results are for reference only. 5.3.3 If required by the manufacturer, ultrasonic flaw detection, residual stress, dezincification corrosion resistance and end face low-magnification inspection shall be carried out. 5.4 Sampling Sampling of bars should be in accordance with Table 10. The sampling method was carried out in accordance with the provisions of YS/T 668. Sample preparation method for mechanical properties According to the provisions of GB/T 34505-2017. 5.5 Determination of test results 5.5.1 The value of the test result shall be revised according to the provisions of GB/T 8170, and shall be determined by the comparison method of the repair value. 5.5.2 If the chemical composition is unqualified, the batch of products is judged to be unqualified. 5.5.3 If the outer dimensions of the bar and its allowable deviation and surface quality are unqualified, the root is judged to be unqualified. The number of unqualified items in each batch is exceeded When the quality limit is received, the whole batch is unqualified, or the supplier is inspected one by one, and the qualified ones are separately ordered and delivered. 5.5.4 When the test results of the mechanical properties, residual stress and end face low-magnification structure are unqualified, the batch of products (including the original In the unqualified bar, another double sample is taken for repeated test. If the repeated test results are all qualified, the whole batch of products is judged. grid. If the test result is still unsatisfactory, the batch of products is judged to be unqualified or tested one by one, and the qualified ones are separately ordered and delivered. 5.5.5 When the test results of the dezincification resistance are unqualified, the sample may be taken again on the unqualified bar. Heat the sample at 450 ° C ~ 550 ° C for not less than 30 min, then take samples from the heat treated sample for dezincification Corrosion performance test, if the treated sample is qualified for dezincification corrosion test, the whole batch of products is qualified. If the test results are still different If the grid is judged, the batch of products is unqualified or tested one by one, and the qualified ones are separately ordered and delivered. 5.5.6 When the fracture and ultrasonic flaw detection are unqualified, the single bar is judged to be unqualified. 6 Marking, packaging, transportation, storage and quality certificates The mark, packaging, transportation, storage and quality certificate of the bar shall be carried out in accordance with the provisions of GB/T 8888. 7 Order form (or contract) content The order form (or contract) for ordering the materials listed in this standard should include the following. a) product name; b) the brand number; c) status; d) size specifications; e) accuracy level (normal or high precision); f) weight or number of roots; g) mechanical properties (hardness test and tensile test are optional); h) ultrasonic flaw detection, residual stress, dezincification resistance, low-end structure of the end face (when required); i) the standard number; j) Other.

Appendix A

(informative appendix) This standard corresponds to the US, EU and Japanese standards The grades corresponding to this standard and the US, EU and Japanese standards are shown in Table A.1. Table A.1 Grades corresponding to the US, EU and Japanese standards ......

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