GB/T 35977-2018Remanufacturing—Technical specifications for surface repair of mechanical products (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This Standard specifies classification, design and selection principles, requirements for surface repair technology for remanufacturing of mechanical product.

This Standard is applicable to design and selection of materials, techniques and processes.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 28619, Remanufacturing - Terminology

GB/T 31208, The methods of quality evaluation for remanufacturing core

GB/T 32809, Remanufacturing - Technological specifications of cleaning for mechanical products

3 Terms and definitions

For the purposes of this document, the terms and definitions defined in GB/T 28619 as well as the followings apply.

6 Requirements

Annex A (informative) Common surface repair technology for remanufacturing

Table A.1 gives common surface repair technology for remanufacturing.

Laser cladding technology

With a high-energy-density laser beam as a heat source, use a filler such as synchronous powder feeding or powdering to add a cladding material to the damaged portion of the surface of the remanufactured blank. After laser irradiation, it is melted simultaneously with a thin layer on the surface of the substrate, and rapidly solidified to form a repair layer.

The repair layer and the substrate are metallurgically bonded, the surface roughness is large, the dilution rate is low, and the heat impact on the substrate is small.

Suitable for remanufacturing of important parts with complex structural shapes and high joint strength requirements. Can be used for surface damage repair as well as for volume damage repair.

Plasma cladding technology

Using a plasma arc as a heat source, a filler material is added by means of simultaneous powder feeding or powdering to add a cladding material to the damaged portion of the surface of the remanufactured blank. It is heated by plasma arc to melt it simultaneously with the thin layer on the surface of the substrate. And quickly form a repair layer.

The repair layer and the substrate are metallurgically bonded, the surface roughness is large, the dilution rate is low, the heat of the substrate is less affected, and the deposition efficiency is higher.

Suitable for remanufacturing of important parts with complex structural shapes and high joint strength requirements. Can be used for surface damage repair as well as for volume damage repair. […]