摘要:
A wear resistant sintered member exhibits superior wear resistance at the same level as those of the conventional materials without using a Co-based hard phase is provided. A first hard phase comprising Mo silicide particles dispersed in an Fe-based alloy matrix of the first hard phase and a second hard phase comprising a ferrite phase or a mixed phase of ferrite and austenite having a higher Cr concentration than the Fe-based alloy matrix surrounding a core consisting of Cr carbide particles, are diffused in an Fe-based alloy matrix, the Mo silicide particles are contained in the first hard phase in an amount of 3 to 25% by area, and the Cr carbide particles are contained in the second hard phase in an amount of 3 to 30% by area.
摘要:
A cam lobe piece of a built-up type camshaft for an internal combustion engine. The built-up type camshaft includes a hollow shaft fixedly inserted in a shaft opening of the cam lobe piece upon diametrical expansion of the hollow shaft. The cam lobe piece comprises a base circle section having the shaft opening, and a cam lobe section formed integral with the base circle section. In this cam lobe piece, the cam lobe piece is formed of a ferrous sintered material which has a density (ρ) meeting the following equation ρ (g/cm 3 ) ≥ - 3/8 × t + 8.9 where t is a thickness (mm) of the base circle section in radial direction.
摘要翻译:用于内燃机的组合式凸轮轴的凸轮凸角片。 该组合式凸轮轴包括一根空心轴,该空心轴在空心轴的径向膨胀时固定地插入凸轮凸角片的轴孔中。 凸轮凸块包括具有轴开口的基圆部分和与基圆部分一体形成的凸轮凸角部分。 在该凸轮凸角片中,凸轮凸角片由具有满足以下等式的密度(ρ)的铁质烧结材料形成ρ(g / cm 3)≥-3/8×t + 8.9,其中t是厚度(mm) 的基圆部分在径向方向上。
摘要:
A wear resistant sintered member exhibits superior wear resistance at the same level as those of the conventional materials without using a Co-based hard phase is provided. A first hard phase comprising Mo silicide particles dispersed in an Fe-based alloy matrix of the first hard phase and a second hard phase comprising a ferrite phase or a mixed phase of ferrite and austenite having a higher Cr concentration than the Fe-based alloy matrix surrounding a core consisting of Cr carbide particles, are diffused in an Fe-based alloy matrix, the Mo silicide particles are contained in the first hard phase in an amount of 3 to 25% by area, and the Cr carbide particles are contained in the second hard phase in an amount of 3 to 30% by area.
摘要:
A cam lobe piece of a built-up type camshaft for an internal combustion engine. The built-up type camshaft includes a hollow shaft fixedly inserted in a shaft opening of the cam lobe piece upon diametrical expansion of the hollow shaft. The cam lobe piece comprises a base circle section having the shaft opening, and a cam lobe section formed integral with the base circle section. In this cam lobe piece, the cam lobe piece is formed of a ferrous sintered material which has a density (ρ) meeting the following equationρ (g/cm3) ≥ - 3/8 × t + 8.9 where t is a thickness (mm) of the base circle section in radial direction.
摘要:
A non-heat treated steel for hot forging and for a connecting rod, containing, in mass percent: 0.3 to 0.8% of C; 0.1 to 2.0% of Si; 0.5 to 1.5% of Mn; 0.01 to 0.15% of P; 1.0% or less of Cr; 0.4% or less of V; 0.05% or less of Al; 0.005 to 0.03% of N; and the balance Fe and inevitable impurities. The non-heat treated steel has a value E of not larger than 150, the value E being calculated from the following equation: E = 2804 - 1549 × Ceq - 8862 × P - 23.4 × H where H is a value of a Rockwell hardness of the connecting rod made of the non-heat treated steel; P is a phosphorus content (%) in the connecting rod; and Ceq is a value of a carbon equivalent.
摘要:
Disclosed is a non-heat treated steel for hot forging, particularly suitable for producing connecting rods of automobile engines. The steel consists essentially of: by weight, C: 0.3-0.8%, Si: 0.1-2.0%, Mn: 0.3-1.5%, P: 0.01-0.15%, Cr: 0-1.0%, V: 0-0.4%, Al: 0-0.05%, N: 0.005-0.03% and the balance being Fe and inevitable impurities, provided that the contents of C, Mn and Cr fulfill the following condition: 1.40[C%]+0.28[Mn%]+0.50[Cr%]≧ 0.75 Pearlite area fraction in this steel after hot forging is 50% or more. Notches are provided with laser beam on an intermediate part at the location from which fracture starts, and load is applied. Then, the intermediate is split to be two components (big end or cap and small end/rod for connecting rod). The components are adhered to form the parts.