GB/T 20509-2023Copper and copper alloys drawing for contacting materials of electric locomotives (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

This document replaces GB/T 20509-2006 "Copper and Copper Alloy Wire Blanks for Electric Locomotive Contact Materials", and is consistent with GB/T 20509-2006 In addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) The scope of application of the standard has been changed, the diameter range of copper wire blanks. changed from "18mm~25mm" to "18mm~34mm" (see Chapter 1, Chapter 1 of the 2006 edition);

b) Added seven grades of TSn0.15, TSn0.3, TSn0.5, TMg0.25, TMg0.35, TMg0.45, TCr0.6-0.1, deleted QSn0.4 grade (see Table 1, Table 1 of the 2006 edition);

c) Added 1/2 hard state, changed the state representation method, changed from "R" to "M30, M20, H02, TH04" (see Table 1, Table 1 of the 2006 edition);

d) The chemical composition, mechanical properties and electrical performance requirements corresponding to the newly added grades are added (see 5.1, 5.3, 5.4);

e) Changed the mechanical performance indicators of the T2 brand (see Table 3, see Table 3 of the 2006 edition);

f) Changed the requirements for "grain size" (see 5.5, see 3.7 of the 2006 edition);

g) Added the requirement of "internal quality" (see 6.6);

h) Delete the requirement of "torsional characteristics" and the corresponding test method (see 3.5, 4.4 of the 2006 edition);

i) Deleted the "arbitration test for resistivity" (see 4.5.3 of the 2006 edition);

j) Changed the billet assembly requirements from "each batch should be composed of the same grade, state and specification" to "each batch should be composed of the same coil of copper wire composition" (see 7.2, see 5.2 of the 2006 edition);

k) The sampling requirements have been changed (see Table 6, see Table 6 of the 2006 edition).

1 Scope

This document specifies the classification, marking, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and accompanying documents and order form.

This document is applicable to copper and copper alloy wire blanks used as contact materials for electrified railway electric locomotives with a diameter of 18mm~34mm.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 3048.2 Test methods for electrical properties of wires and cables - Part 2: Tests for resistivity of metallic materials

GB/T 4909.2 Test methods for bare wires Part 2: Dimensional measurement

GB/T 4909.3 Test methods for bare wires Part 3: Tensile test

GB/T 5121 (all parts) Methods for chemical analysis of copper and copper alloys

GB/T 5231 Processed copper and copper alloy grades and chemical composition

GB/T 8170 Numerical rounding off rules and expression and determination of limit values

GB/T 29997 Copper and copper alloy rod and wire eddy current flaw detection method

YS/T 347 Method for Determination of Average Grain Size of Copper and Copper Alloys

3 Terms and Definitions

This document does not have terms and definitions that need to be defined.

4 Classification and labeling