The Study on Feasibility and Welding Characteristics of GMAW Surfacing Remanufacturing of H13 Steel Cutter Ring of TBM Hob

Abstract

As H13 steel is a common material for cutters of Tunnel Boring Machine (TBM), the research on surfacing remanufacturing performance is of great value. In this paper, the phase composition of the surfacing layer of H13 steel after gas metal arc welding (GMAW) was analyzed by exploring the precipitation of hard phase in the molten pool, and the microstructure evolution of the surfacing layer was revealed. Then, we carried out simulation modeling analysis on H13 steel surfacing remanufacturing. Results show that: (1) the surfacing layer is combined with the base metal by physical metallurgy without obvious defects such as pores, inclusions and cracks in the surfacing layer; (2) the hardness of the surfacing layer is 60 HRC, which is about 1.5 times of that of the base metal; (3) the stress is mainly concentrated in the arc starting and ending points, followed by the external constraints on both sides of the surfacing layer; (4) the deformation of surfacing layer is slight, which does not affect the forming quality of base metal, while the deformation of base metal is relatively severe. This paper verifies the feasibility of H13 steel remanufacturing from experimental and simulation, providing theoretical basis for future engineering practice.

The Influence of the Hot Working Tool Steel Substrate Material on the Element Distribution, Microstructure and Hardness of Gas Metal Arc Welding Hardfaced Layers

“…For that reason, the rebuilding of forging dies is often considered and welding is the most popular technology in such cases. Countless welding processes are used for that purpose, while the majority of repair welding is done by gas metal arc welding (GMAW) [13,14] or gas tungsten arc welding (GTAW) [15,16]. The surfacing processes using high energy density welding processes are being considered recently as well, like plasma transfer arc (PTA) [17,18] or laser cladding (LS) [19,20].…”

Feasibility Study for the Remanufacturing of H13 Steel Heat-Treated TBM Disc Cutter Rings with Uniform Wear Failure Using GMAW

“…Remanufacturing technology has been widely used in the automotive, aviation, and marine fields and has achieved good economic benefits [ 8 , 9 , 10 ]. In order to avoid direct scrapping of failed cutter rings and to reduce carbon emissions, He et al [ 11 ] proposed a remanufacturing scheme for failed cutter rings of TBM disc cutters with uniform wear (hereinafter referred to as normally-worn rings) based on gas metal arc welding technology (GMAW). Initially, they verified the feasibility of remanufacturing repair of cutter rings that are made of AISI H13 hot work tool steel (hereinafter referred to as H13 steel).…”

Parameter Optimization and Mechanical Properties of Laser Cladding of 316L Stainless Steel Powder on G20Mn5QT Steel

“…Previously, many surface modification techniques [5][6][7][8] have also been used to repair other materials and thus improve their service life. Examples include surface remanufacturing [9], thermal spraying [10], electroplating [11], and vapor deposition [12]. These techniques enhance the surface properties of the substrate without changing the overall properties of the substrate material.…”