Effect of rare earth cerium on the impact toughness, corrosion and wear resistance of CrNiMnMo alloyed lining steel

Abstract

The effects of the addition of rare earth cerium on the impact corrosion and wear resistance of CrNiMnMo alloyed lining steel were studied using metallurgical microscopy, scanning electron microscope, x‐ray powder diffraction, a hardness tester, an impact tester, and an impact corrosion abrasion tester. The properties of CrNiMnMo alloyed lining steel with the addition of cerium were compared with that of CrNiMnMo steel without the addition of cerium after being heat treated by same processes. The results show that CrNiMnMo alloyed lining steel with the addition of rare earth cerium consisted of lath martensite with a low residual austenite phase after being quenched and tempered. The lath of the martensite was fine and uniform. The impact toughness and the corrosion resistance of the steel lining board improved greatly with the addition of cerium and the impact toughness increased by 22 % with the fracture mode of being ductile. The CrNiMnMo alloyed lining steel with cerium showed the highest resistance to impact corrosion abrasion compared with the alloy without cerium.

Revealing the Role of Cerium on Precipitation Behavior of In Situ TiC Particles and Wear Resistance of High‐Titanium Wear‐Resistant Steels

“…[24,25] Adding rare earth elements to steel can refine the grain size. [18] Herein, studying the influence of rare earth elements on the size and distribution of TiC particles, the size of the martensite lath, and wear resistance in high-titanium wear-resistant steel is essential.…”

“…[13][14][15][16][17] The addition of trace amounts of rare earth elements to steel makes the inclusion finer and denser effectively, improving the toughness, plasticity, and wear resistance of steel. [18][19][20][21] For example, The effect of the addition of Ce on the morphology of Al 2 O 3 inclusions, when added to the steel, was studied in the literature. [13] During solidification, when cerium was added to the steel for 1 min, there were still small amounts of inclusions that were not completely modified, which consisted of an Al 2 O 3 core wrapped in a CeAlO 3 ring.…”

“…The mechanical properties of CrNiMnMo alloyed lining steel with the addition of cerium and CrNiMnMo steel without cerium were compared after heat treatment by the same processes in the literature. [ 18 ] After adding cerium, the lath of martensite was fine and uniform, the impact toughness of the steel lining board was greatly improved, the impact toughness increased by 22%, and the fracture mode was ductile. Moreover, the size of the martensite lath in high‐titanium wear‐resistant steel is beneficial for enhancing wear resistance.…”

Effect of Rare Earth Cerium Replacement of Nickel on Cryogenic Toughness of 7Ni Steel

“…Sun et al [ 21 ] concluded that optimum Ce concentration with its homogeneous distribution in the matrix is the most effective at retarding the formation of secondary phases and therefore preventing the degradation of mechanical properties. Ahn et al [ 22 ] found obvious increase in the impact energy of the duplex stainless steel and the brittle‐to‐ductile transition temperature slightly decreased by ≈10 °C with the addition of Ga. Du et al [ 23 ] found that the impact toughness of the CrNiMnMo steel lining board improved greatly with the addition of cerium and the impact toughness increased by 22% with the fracture mode of being ductile. Wang et al [ 24,25 ] indicated through thermodynamic calculations that the denaturation sequence of Ce inclusions was Al 2 O 3 → CeAlO 3 → Ce 2 O 3 + Ce 2 O 2 S → Ce 2 O 2 S. The study could provide theoretical guidance for inclusion‐controlling perspective under different deoxidation conditions of the RE‐containing steel.…”