The effect of boron on the wear behavior of iron-based hardfacing alloys for nuclear power plants valves

Yoo, Jeong Wan; Lee, Seong Hun; Yoon, Chong Seung; Kim, Seon Jin

doi:10.1016/j.jnucmat.2006.02.071

Cited by 40 publications

(20 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…of scarce molybdenum and chromium elements, and therefore decreases the production cost. Previous studies [11,12] showed that the hardness of Fe 2 B and FeB type borides is up to 1,500 and 2,400 HV, respectively, while the hardness of (Cr,Fe) 7 C 3 type carbide is only 1,300-1,500 HV. The investigations [13,14] on abrasion wear resistance of high chromium cast irons discovered that M 7 C 3 carbides have higher microindentation hardness in the transverse direction than in the longitudinal direction, and high chromium cast irons present higher abrasion resistance in the transverse section than in the longitudinal section of the M 7 C 3 carbides.…”

Section: Introductionmentioning

confidence: 96%

Effect of Fe2B boride orientation on abrasion wear resistance of Fe-B cast alloy

Xing

et al. 2017

China Foundry

View full text Add to dashboard Cite

W ear is one of the most important cost factors during mineral processing, rolling steel, cement production and material handling [1][2][3] . High chromium cast irons and Ni hard cast irons contain many eutectic carbides which have high hardness and excellent wear resistance. They are widely used in the above wear domain [4][5][6] . Because high chromium cast irons contain many alloy elements, such as chromium, nickel and molybdenum, etc., they have higher production cost. Moreover, they also have high brittleness and low toughness. Therefore, the development of a high property and low cost wear-resistant material has an important meaning. The proper boron concentration in a low alloy cast steel can produce high hardness boride and improve the wear resistance [7][8][9][10] , which also reduces the addition Abstract:The microstructures and abrasion wear resistance of directional solidification Fe-B alloy have been investigated using optical microscopy, X-ray diffraction, scanning electron microscopy and laser scanning microscopy. The results show that the microstructure of as-cast Fe-B alloy consists of ferrite, pearlite and eutectic boride. After heat treatment, the microstructure is composed of boride and martensite. The plane which is perpendicular to the boride growth direction possesses the highest hardness. In two-body abrasive wear tests, the silicon carbide abrasive can cut the boride and martensite matrix synchronously, and the wear mechanism is micro cutting mechanism. The worn surface roughness and the wear weight loss both increase with the increasing contact load. Moreover, when the boride growth direction is perpendicular to the worn surface, the highest hardness plane of the boride can effectively oppose abrasion, and the martensite matrix can surround and support borides perfectly. of scarce molybdenum and chromium elements, and therefore decreases the production cost. Previous studies [11,12] showed that the hardness of Fe 2 B and FeB type borides is up to 1,500 and 2,400 HV, respectively, while the hardness of (Cr,Fe) 7 C 3 type carbide is only 1,300-1,500 HV. The investigations [13,14] on abrasion wear resistance of high chromium cast irons discovered that M 7 C 3 carbides have higher microindentation hardness in the transverse direction than in the longitudinal direction, and high chromium cast irons present higher abrasion resistance in the transverse section than in the longitudinal section of the M 7 C 3 carbides. Similarly, it has been reported that the borides (Fe 2 B) in Fe-B alloys also have higher microindentation hardness in the transverse than in the longitudinal direction [15] . However, scores of studies have been performed on the effect of boride orientation on abrasion wear resistance. Therefore, focus of this study is on the microstructures and the effect of boride orientation on wear behaviors of the Fe-B cast alloys under directional solidification conditions.

show abstract

Section: Introductionmentioning

confidence: 96%

Effect of Fe2B boride orientation on abrasion wear resistance of Fe-B cast alloy

Xing

et al. 2017

China Foundry

View full text Add to dashboard Cite

show abstract

“…Borides are the common hard phases in hardfacing alloys [10,11]. Borides that form with the transition metals have long been known to possess high hardness and excellent wear, friction and corrosion resistance [12]. In literature some studies revealed that boron promoted the development of primary hard phases such as boride, increasing the volume fraction of these wear resistant hard phases [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Borides that form with the transition metals have long been known to possess high hardness and excellent wear, friction and corrosion resistance [12]. In literature some studies revealed that boron promoted the development of primary hard phases such as boride, increasing the volume fraction of these wear resistant hard phases [12][13][14]. Boride-rich cored wires are used widely in cladding or hard surfacing of some industrial applications by spraying or welding methods [15].…”

Section: Introductionmentioning

confidence: 99%

A Study on Hardfacing Alloy Using Fe-Cr and Fe-B Powders

2015

View full text Add to dashboard Cite

The aim of this study is the investigation of the effect of ferroboron and ferrochromium with massive wire based hardfacing alloys. Mixture of Fe-Cr and Fe-B powders was added to massive wire during welding process. Hardface layers were obtained by three different powder mixture and three different powder/massive wire proportions. Hardfacing was applied to two AISI 1020 steel substrates by open arc welding. Hardness test, scanning electron microscope and X-ray diffraction analysis were made to the samples. Test results showed that increasing ferroboron content and increasing powder mixture amount enhanced the microhardness of the specimens.

show abstract

“…For saving production costs and enabling a longer service life, damaged parts due to these wear and corrosion phenomena may result in enormously consuming money and time for maintenance and reparation. So, the developments of new processes and thermal treatments for alloys have been allowed to solve these problems [1,2]. However, it may become more essential and preferential that the alloy itself develops and improves in order to incorporate the excellent wear and corrosion properties when operating in aggressive industry environment.…”

Section: Introductionmentioning

confidence: 99%

Effect of nickel alloying on corrosion and wear resistance of the strain-induced martensitic transformable wear resistant Fe-20Cr-1.7C-1Si alloy

Kim

Park

Cho

et al. 2009

ESOMAT 2009 - 8th European Symposium on Martensitic Transformations

Self Cite

View full text Add to dashboard Cite

Abstract. The strain-induced martensitic transformable wear resistant Fe-20Cr-1.7C-1Si alloy was investigated with regard to its corrosion and wear behavior with variations in nickel content. Although an amount of 10 wt.% nickel was not enough to form the passive layers on the surface of the alloys, it was clearly explained that the presence of nickel in the alloy is beneficial to corrosion resistance in the saline medium. Meanwhile, 3 and 5 wt.% nickelcontaining alloys were almost retained the excellent wear resistance of the nickel-free alloy during the wear test up to 2000 cycles. However, that of 7 and 10 wt.% nickel-containing alloys were abruptly deteriorated due to lowering the hardness of matrix and being insignificant the role of strain-induced martensitic transformation. Results of the study suggest that the nickel addition was apparently attributable to be beneficial effect on the corrosion resistance of the alloy. However, it was shown that the wear resistance of the alloy contained above 5 wt.% nickel was remarkably deleterious. Thus, it was demonstrated that 5 wt.% nickel was the proper quantity which is able to improve corrosion resistance without the loss of wear resistance for the Fe-20Cr-1.7C-1Si alloy at room temperature in air.

show abstract

The effect of boron on the wear behavior of iron-based hardfacing alloys for nuclear power plants valves

Cited by 40 publications

References 8 publications

Effect of Fe2B boride orientation on abrasion wear resistance of Fe-B cast alloy

Effect of Fe2B boride orientation on abrasion wear resistance of Fe-B cast alloy

A Study on Hardfacing Alloy Using Fe-Cr and Fe-B Powders

Effect of nickel alloying on corrosion and wear resistance of the strain-induced martensitic transformable wear resistant Fe-20Cr-1.7C-1Si alloy

Contact Info

Product

Resources

About