Tubular welding rods of tungsten carbide
1 Scope
This document specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, accompanying documents and order contents of tubular welding rods of tungsten carbide.
This document is applicable to the tubular welding rods of tungsten carbide (hereinafter referred to as "welding rods”) used for overlaying or brazing on the surface of steel parts.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 699 Quality carbon structure steels
GB/T 1480 Metallic powders - Determination of particle size by dry sieving
GB/T 2967 Cast tungsten carbide powder
YS/T 412 Cemented carbide pellets
3 Terms and definitions
No terms and definitions are listed in this document.
4 Product classification
The welding rods are divided into four designations (namely, HTYZ, HTYQ4, HTYQ6 and HTYQ7) according to the types of hard particles.
Table 1 Designations and types of hard particles
Designations Types of hard particles
HTYZ Cast tungsten carbide
HTYQ4 WC-4Co cemented carbide pellets
HTYQ6 WC-6Co cemented carbide pellets
HTYQ7 WC-7Co cemented carbide pellets
The hard particles not specified in this table may be mixed type, and the mixing ratio shall be determined by the supplier and the demander through negotiation.
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation, storage and accompanying documents
9 Order information
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation, storage and accompanying documents
9 Order information
