Effect of Y-Ce Complex Modification on Thermal Fatigue Behavior of High Cr Cast Hot Working Die Steels

Abstract

The effect of Y-Ce complex modification on the thermal fatigue (TF) behavior of cast hot working die steels was investigated and the mechanism of Y-Ce action was discussed. The experimental result showed that TF behavior of the steel modified by Y-Ce complex modification under thermal cycling temperatures of 650-25°C was over 1.5 times than that of the unmodified, which is likely due to the enhancing of the resistance to oxidation. At the same time, after the Y-Ce complex modification, impact toughness was also increased by nearly 200 %, which is mainly attributed to the great improvement of the morphology and distribution of inclusions and the reduction of their amount.KEY WORDS: Y-Ce complex modification; cast hot working dies steels; thermal fatigue.

Effect of Yttrium Addition on Nonmetallic Inclusions in FeCrAl Alloys

“…[ 9 ] Different from other rare earth elements, rare earth yttrium (Y) has a better solid solution effect due to its small atomic radius and can effectively improve the high‐temperature oxidation resistance of metal materials. [ 10–13 ]…”

“…[9] Different from other rare earth elements, rare earth yttrium (Y) has a better solid solution effect due to its small atomic radius and can effectively improve the hightemperature oxidation resistance of metal materials. [10][11][12][13] To date, rare earth elements, such as La and Ce, have been widely used in the steelmaking process. [14][15][16][17][18] However, fewer studies focus on the modification of inclusions by using yttrium.…”

Study on the Control of Rare Earth Metals and Their Behaviors in the Industrial Practical Production of Q420q Structural Bridge Steel Plate

“…Among the various performance properties, the most important requirements are low temperature impact toughness and welding. There are many laboratory studies on the effects of rare earth (RE) metals addition to the toughness of steels [4][5][6][7][8]. RE can refine and change the shape/distribution of inclusions in steel to improve strength and toughness.…”

Characteristics of the thermal fatigue resistance for 3.1C, 0.8Si, 0.9Mn, 1.7Cr, 4.5Ni and 0.3Mo ICDP cast iron roll at 600 °C

“…[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] Several research works related to thermal fatigue resistance of die materials (i.e. steels, cast irons) were carried out where reasons for initiation and growth of cracks at hot working dies (forging, die casting) [17][18][19][20][21][22][23][24][25][26][27][28][29][30] and hot working rolls [3][4][5][6]9,[31][32][33][34] were investigated using various laboratory tests. However, detailed knowledge about the influence of the stress state, the temperature and the oxidation on the initiation and propagation of thermal cracks in hot working applications is still lacking.…”