Abstract
Based on the laser stereo forming technology, the 1Cr12Ni3Mo2V matrix composite specimens with different TiC particles (volume fraction of 0%, 10% and 20%) have been made by controlling the iron-base powder and TiC powder feeding rate. The phase analyses have been carried out based on the specimens with different TiC particles. And the microstructure of each specimen has been analysed and compared. The formation mechanism has been discussed, and the hardness of different specimens has been tested, and then the friction and wear properties of each specimen have been analysed. The results show that TiC particles and 1Cr12Ni3Mo2V stainless steel are well combined by the laser stereo forming technology. TiC exists mainly in two ways, one is TiC which is not completely decomposed, and the other is TiC which is newly precipitated. Compared to 0% and 10% TiC, 20% TiC has better hardness and wear resistance. The main occurrence of 0% TiC is abrasive wear and adhesive wear, while 1Cr12Ni3Mo2V composites of 10% TiC and 20% TiC particles are mainly adhesive wear and oxidative wear.
Highlights
Modern war is the confrontation of battle effectiveness, and the competition of safeguarding ability
The supply of most equipment spare parts mainly relies on the multilevel supply channels and a small number of key spare parts are carried by the troops and preset on the battlefield
Modern local wars show that the troop, whoever can provide urgently needed equipment spare parts in time on the battlefield and deal with the accidental damage of the equipment on the battlefield, can quickly restore the level of combat effectiveness of equipment and win the initiative in the war that provides a strong support for the final victory of the war
Summary
Modern war is the confrontation of battle effectiveness, and the competition of safeguarding ability. The research of the laser stereo forming technology mainly focuses on the materials, technology, organization, performance and related laws It has made many achievements in aerospace, vehicle manufacturing, biomedical and other aspects (Wang et al, 2015; Yadroitsev et al, 2012; and Moletsane et al, 2016). The mature metal materials mainly include titanium alloys, nickel-based alloys and aluminium alloys, which are mostly used in aerospace parts (Calignano, 2018; Cabrini et al, 2016). Because of their high cost or poor performance, they are not suitable for processing equipment spare parts. The influence rules of microstructure and wear resistance has been studied
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