Analysis of organizational structure and wear resistance of Nb-Ni-Ti-B strengthened flux-cored wire surfacing metal

ZHU Houguo; ZHAO Kun; HUO Shubin; JI Rongliang; SONG Changhong; CHEN Bo

doi:10.7512/j.issn.1001-2303.2021.03.06

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Analysis of organizational structure and wear resistance of Nb-Ni-Ti-B strengthened flux-cored wire surfacing metal
Vol. 51, Issue 3, Pages: 31-36(2021)
Published：2021
DOI： 10.7512/j.issn.1001-2303.2021.03.06
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DOI：

ZHU Houguo, ZHAO Kun, HUO Shubin, et al. Analysis of organizational structure and wear resistance of Nb-Ni-Ti-B strengthened flux-cored wire surfacing metal[J]. Eletric Welding Machine2021, 51(3): 31-36. DOI： 10.7512/j.issn.1001-2303.2021.03.06.

摘要

针对Nb-Ni-Ti-B强化药芯焊丝堆焊金属进行研究

采用XRD和SEM分析了样品的相结构和显微结构;研究发现焊丝熔敷金属中的Fe

B能使熔敷金属堆焊层更加稳固

具有良好的抗剥离性能

B的硬度高、耐磨性好、分布均匀

镶嵌在熔敷金属的基体中有着骨架的作用

使该合金具有了良好的耐磨性;堆焊金属中的TiC为NbC提供了凝结核

形成NbC+TiC复合相

在提高耐磨性的同时有利于促进NbC弥散分布。NbC+TiC复合相弥散分布在熔敷金属中

部分NbC+TiC复合相嵌于Fe

B组织中有利于固化Fe

B组织。通过Nb-Ni-Ti-B强化药芯焊丝堆焊金属与5C-27Cr型高碳高铬合金焊丝熔敷金属磨损试验比较

Nb-Ni-Ti-B强化堆焊金属相对5C-27Cr型高碳高铬合金的耐磨性为2.08。

Abstract

This paper studies the surfacing metal of Nb-NiTi-B strengthened flux-cored wire

the crystalline structure and morphology were analyzed by XRD and SEM. The results show that Fe

B in the deposited metal can make the deposited metal more stable and has good peeling resistance. Fe

B has high hardness

good wear resistance and uniform distribution. It is embedded in the deposited metal as a skeleton

making the alloy have good wear resistance. TiC in the surfacing metal provides condensation nucleus for NbC to form NbC+TiC eutectic tissue

it is beneficial to promote NbC dispersion distribution while improving wear resistance. The NbC + TiC eutectic structure is dispersed in the surfacing metal

and part of the NbC + TiC eutectic structure embedded in the Fe

B structure is conducive to the fixation of Fe

B structure. By comparing the wear test of NbNi-Ti-B strengthened flux cored wire and 5C-27Cr high carbon and high chromium alloy welding wire

the wear resistance of NbNi-Ti-B strengthened flux cored wire is 2.08 compared with 5C-27Cr high carbon and high chromium alloy welding wire.