Development of disc brake rotors for trucks with high thermal fatigue strength

Yamabe, Junichiro; Takagi, Masami; Matsui, Toshiharu; Kimura, Takashige; Sasaki, Masanori

doi:10.1016/s0389-4304(01)00153-9

Cited by 51 publications

(17 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From this process, they suggested the need for developing a new material for brake discs to promote safe use of vehicles. Yamabe et al [3] developed candidate materials with varying chemical compositions of Ni, Cr, Mo, and Ce to develop brake rotors that have the same thermal fatigue strength as conventional products but can be produced at lower costs. They also conducted mechanical property and friction tests on these materials.…”

Section: Introductionmentioning

confidence: 99%

Development of compacted vermicular graphite cast iron for railway brake discs

Lim

Goo

2011

Met. Mater. Int.

View full text Add to dashboard Cite

In the case of employing brake discs as a key component of mechanical brake equipment, the initiation of thermal cracking owing to repetitive thermal shock generated during braking may potentially lead to higher maintenance costs, worsened braking performance, and greater risk of railway accidents. The purpose of this study is to gain basic data to facilitate application of compacted vermicular (C. V.) graphite cast iron to brake discs in order to obtain high thermal crack resistance and improved lifetime. To this end, this study developed three types of C. V. graphite cast iron with differing content of key elements, including Ni, Cr, and Mo. Each test specimen underwent numerous tests for evaluation of materials characteristics, and the results were compared with those obtained for existing materials. The test results show that the thermal fatigue lifetime of material C is nearly double that of the conventional material. This demonstrates the suitability of material C as a material for brake discs in mid-to high-speed railway vehicles.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of compacted vermicular graphite cast iron for railway brake discs

Lim

Goo

2011

Met. Mater. Int.

View full text Add to dashboard Cite

show abstract

“…Gray cast iron has been widely used in vehicles as a major material for brake drums, exhaust pipes and cylinders because of its low cost and desirable properties such as low melting point, good fluidity and cast-ability, excellent machinability, better wear resistance and other good properties [1][2][3][4][5]. However, for the brake drums, the alternately heating and cooling caused by frequently braking may bring as a result to initiation and propagation of thermal crack.…”

Section: Introductionmentioning

confidence: 99%

“…It is important and urgent to improve and to enhance the frictional wear properties and thermal fatigue resistance of brake drum materials. Improving the mechanical properties of brake materials is mainly done by adding alloy elements [1,11,12]. Mitsubishi Motors has used gray cast iron with 1.2% of nickel, plus chromium and molybdenum added in trucks as the material for brake drums [1]; Cheng et al [13] found that the microstructure and mechanical properties of cast iron were improved by means of micro-alloying with 0.51% Cu and 0.32% Cr (in wt.%) and reported its improvement for the service life of brake drums.…”

Section: Introductionmentioning

confidence: 99%

“…Improving the mechanical properties of brake materials is mainly done by adding alloy elements [1,11,12]. Mitsubishi Motors has used gray cast iron with 1.2% of nickel, plus chromium and molybdenum added in trucks as the material for brake drums [1]; Cheng et al [13] found that the microstructure and mechanical properties of cast iron were improved by means of micro-alloying with 0.51% Cu and 0.32% Cr (in wt.%) and reported its improvement for the service life of brake drums. Nevertheless, it is noted that with regarding to the difficulty of choosing suitable elements with proper chemical compositions, it is difficult to enhance the thermal fatigue resistance in this way without sacrificing the mechanic property of the bulk materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The thermal fatigue resistance of vermicular cast iron coupling with H13 steel units by cast-in process

et al. 2010

View full text Add to dashboard Cite

a b s t r a c tThis paper focuses on improving the thermal fatigue resistance on the surface of vermicular cast iron coupling with inserted H13 steel blocks that had different cross sections, by cast-in processing. The microstructure of bionic units was examined by scanning electron microscope. Micro-hardness and thermal fatigue resistance of bionic samples with varied cross sections and spacings were investigated, respectively. Results show that a marked metallurgical bonding zone was produced at interface between the inserted H13 steel block and the parent material -a unique feature of the bionic structure in the vermicular cast iron samples. The micro-hardness of the bionic samples has been significantly improved. Thermal resistance of the samples with the circular cross section was the highest and the bionics sample with spacing of 2 mm spacing had a much longer thermal fatigue life, thus resulting in the improvement for the thermal fatigue life of the bionic samples, due to the efficient preclusion for the generation and propagation of crack at the interface of H13 block and the matrix.Crown

show abstract

“…The alternately heating and cooling caused by frequent braking may lead to initiation and propagation of thermal cracks. Moreover, due to stretching force, the long cracks would make the sudden break of brake drum, and this threatens the safety of vehicles (Daimaruya et al, 1997;Thomas et al, 2002;Malak, 2001;Hadavi et al, 2004;Campos et al, 2005;Hecht et al, 1999;Yamabe et al, 2002). Therefore, it is urgent to enhance thermal fatigue resistance of the brake drum material.…”

Section: Introductionmentioning

confidence: 99%