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3. Improving the service life of carbonitrided parts subjected to contact fatigue
The team led by Professor Y. Watanabe, from Kanagawa University, has been working with Nissan on the benefits of nitrogen-rich carbonitriding. combined with shot peening on case-hardened steels (CrMo). Contact fatigue tests (figure 9 ) were carried out on case-hardened (% C: 0.7) and carbonitrided (% C: 0.8 and % N: 1.1) specimens, all shot-blasted with cast-iron balls (hardness: 700 HV/overlap rate > 300%).
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Improving the service life of carbonitrided parts subjected to contact fatigue
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