An impact and wear resistant flux cored wire for welding high manganese steel liner plate and a surfacing method

By using flux-cored wire with specific composition and plasma arc automatic surfacing technology on the high manganese steel liner of the ball mill, the problems of brittle fracture in the heat-affected zone and floating of deoxidation products were solved, thereby improving the impact and wear resistance and interfacial bonding strength of the high manganese steel liner and ensuring the efficient operation of the ball mill.

CN121373899BActive Publication Date: 2026-05-12ANSTEEL GROUP MINING CO LTD
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Patent Information

Application Number
CN202511959738.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-12-24
Publication Date
2026-05-12
Estimated Expiration
2045-12-24

AI Technical Summary

Technical Problem

Existing technologies for welding high-manganese steel liners for ball mills suffer from problems such as heat-affected zone brittleness, interface cracking, and difficulty in floating deoxidation products, resulting in insufficient wear resistance and impact resistance, making it difficult to meet the high-efficiency operation requirements of ball mills.

Method used

Using flux-cored welding wire containing high-carbon ferrochrome, micro-carbon ferrochrome, graphite, ferrosilicon, ferromanganese, ferrotitanium, ferromolybdenum, ferrovanadium, ferroboron, nickel powder, and calcium fluoride, the welding is automatically deposited by plasma arc. The welding parameters and shielding gas flow are controlled to form a low-dilution, non-peeling, impact-resistant and wear-resistant coating. The solid solution strengthening effect of nickel powder and the weak self-protection effect of calcium fluoride powder are utilized to alleviate interfacial stress and porosity.

Benefits of technology

This achieves a metallurgical bond between the high-manganese steel liner and the weld overlay, reducing the risk of interface cracking, improving wear resistance, enhancing impact wear resistance, reducing porosity, and ensuring the structural integrity and ease of installation of the liner.

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Abstract

The invention discloses a kind of welding high manganese steel lining plate's impact wear resistant flux-cored wire and surfacing method, belong to surface engineering technical field, for the problem such as traditional high manganese steel lining plate brittle crack, surfacing layer peeling and deformation, flux-cored wire: high-carbon chromium iron powder, micro-carbon chromium iron powder, graphite powder, silicon iron powder, manganese iron powder, titanium iron powder, molybdenum iron powder, vanadium iron powder, boron iron powder, calcium fluoride powder, nickel powder, the balance is iron powder;Outer skin is low-carbon cold-rolled steel strip, diameter 2.4~3.2mm, filling rate 42~50%;Surfacing method: pretreatment, drying, adopt plasma arc automatic surfacing: current 135~180A, welding speed 350~650mm / min, wire feeding speed 1800~2200mm / min, compressed gas and protective gas are argon, control high manganese steel lining plate surface temperature;The invention realizes that surfacing layer hardness is high, wear resistance is strong, substrate deformation is small and there is no interface cracking by nickel powder solid solution, calcium fluoride powder weak self-protection.
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