Development of High-Strength Suspension Coil Springs with Improved Corrosion Fatigue Strength

Nakano, Tomohiro; Sakakibara, Takayuki; Wakita, Masami; Sugimoto, Atsushi

doi:10.5346/trbane.2001.7

Cited by 5 publications

(2 citation statements)

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“…It's well known that the increase of ferrite depth can be obtained from the Eq. (6) [14]: (6) where h F2 is the increase of ferrite decarburized depth / m, t is the soaking time / s, d α is the diffusion coefficient of carbon in ferrite / (m 2 ·s -1 ), C α and C B are shown in Fig. 6 and both constant when heating temperature is constant, so F 2 is a constant coefficient.…”

Section: The Mathematical Model Of Ferrite Decarburization At 760 °C mentioning

confidence: 99%

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Ferrite Decarburization of High Silicon Spring Steel in Three Temperature Ranges

Zhao¹,

Zhang²,

Liu³

2016

Archives of Metallurgy and Materials

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Surface decarburization of high silicon spring steel in ambient air was studied. The experimental results confirmed the decarburized mechanism under AC1 temperature, in the temperature range of AC1-AC3 and AC3-G. Under AC1 temperature, pearlite spheroidization and surface decarburization are carried out simultaneously and pearlite spheroidization is reinforced. Considering the oxidation loss depth, the “true ferrite decarburized depth” at 850 °C (AC3-G) is still smaller than that at 760°C (AC1-AC3). That is because an “incubation period” must pass away before ferrite decarburization occurs in the temperature range of AC3-G, and the ferrite decarburized rate is limited to being equal to the partial decarburized rate.

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Section: The Mathematical Model Of Ferrite Decarburization At 760 °C mentioning

confidence: 99%

“…The high silicon spring steel can suffer from severe decarburization, which greatly influences the material properties, such as strength, hardness and fatigue resistance [5][6][7]. The fatigue limit can compromise dramatically if the ferrite decarburization forms [8].…”

Section: Introductionmentioning

confidence: 99%