Microalloying gray cast iron clutch pressure plate material and preparation method thereof

A technology of micro-alloying and gray cast iron, applied in the field of clutch pressure plate, can solve the problem of inability to meet the requirements of the designer, and achieve the effect of good application prospect, high strength and toughness, and excellent casting performance.

Inactive Publication Date: 2016-10-26
NINGBO HONGXIE CLUTCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the gray cast iron materials currently used can no longer meet the requirements of designers, especially the development needs of high-horsepower heavy-duty vehicle clutches and the needs of customers to a large extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Chemical composition: C 3.5%, Si 2.3%, Mn 0.4%, P 0.08%, S 0.06%, Cr 0.3%, Cu0.5%, V0.2%, Sb 0.04%, the balance is Fe.

[0040] Melt smelting and treatment: smelting temperature 1500°C, melt processing temperature 1460°C, pouring temperature 1390°C, adopt silicon barium and ferrosilicon composite inoculation treatment technology, SiBa inoculant: adding amount 0.3%; 75SiFe inoculant: adding amount 0.5% %.

[0041] Metallographic structure: vermicular graphite, vermicular rate 80%, matrix structure, pearlite 86%.

[0042] Mechanical properties: tensile strength 262MPa, hardness 231, elongation 1.7%, fatigue performance at room temperature 200MPa (1×107 times).

[0043] Physical properties: thermal conductivity 52W / m·K, friction coefficient 0.72.

Embodiment 2

[0045] Chemical composition: C 3.6%, Si 2.3%, Mn 0.5%, P 0.1%, S 0.07%, Cr 0.3%, Cu0.5%, V0.2%, Sb 0.04%, the balance is Fe.

[0046] Melt smelting and treatment: smelting temperature 1500°C, melt processing temperature 1460°C, pouring temperature 1390°C, adopt silicon barium and ferrosilicon composite inoculation treatment technology, SiBa inoculant: adding amount 0.4%; 75SiFe inoculant: adding amount 0.5 %.

[0047] Metallographic structure: vermicular graphite, vermicular rate 87%, matrix structure, pearlite 85%.

[0048] Mechanical properties: tensile strength 271MPa, hardness 235, elongation 1.6%, fatigue performance at room temperature 208MPa (1×107 times).

[0049] Physical properties: thermal conductivity 52W / m·K, friction coefficient 0.76.

Embodiment 3

[0051] Chemical composition: C 3.8%, Si 2.4%, Mn 0.6%, P 0.1%, S 0.06%, Cr 0.25%, Cu0.6%, V0.3%, Sb 0.04%, the balance is Fe.

[0052] Melt smelting and treatment: smelting temperature 1500°C, melt processing temperature 1460°C, pouring temperature 1390°C, adopt silicon barium and ferrosilicon composite inoculation treatment technology, SiBa inoculant: adding amount 0.5%; 75SiFe inoculant: adding amount 0.5% %.

[0053] Metallographic structure: worm-like graphite, vermicular rate 89%, matrix structure, pearlite 88%.

[0054] Mechanical properties: tensile strength 280MPa, hardness 245, elongation 1.5%, fatigue performance at room temperature 210MPa (1×107 times).

[0055] Physical properties: thermal conductivity 55W / m·K, friction coefficient 0.78.

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Abstract

The invention relates to a microalloying gray cast iron clutch pressure plate material and a preparation method thereof. The microalloying gray cast iron clutch pressure plate material is composed of, by mass, 3.5%-3.9% of C, 2.2%-2.7% of Si, 0.4%-1.5% of Mn, 0-0.1% of P, 0.06%-0.10% of S, 0.2 %-0.4% of Cr, 0.4%-0.7% of Cu, 0.1%-0.4% of V and the balance Fe. The preparation method comprises the step of compound inoculation treatment of silicon barium and silicon iron. The microalloying gray cast iron clutch pressure plate material is high in toughness, good in heat resistance and excellent in casting performance, and a clutch pressure plate produced through gray cast iron which replaces universally adopted gray cast iron at present meet the development requirements of clutches and even engines in the direction of high efficiency, energy saving and emission reduction and has good application prospects.

Description

technical field [0001] The invention belongs to the field of clutch pressure plates, in particular to a microalloyed gray cast iron clutch pressure plate material and a preparation method thereof. Background technique [0002] The clutch pressure plate is one of the key components of the clutch. When the clutch pressure plate is working, the pressure plate is combined with the friction plate under the action of the spring, so that the engine power is transmitted to the gearbox. When the clutch needs to be disengaged, the release lever pulls the clutch pressure plate, overcomes the active force of the spring on the pressure plate, and separates the pressure plate from the friction plate. The clutch pressure plate controls whether the clutch pressure plate is combined with the flywheel through hydraulic or mechanical transmission, and transmits the power of the engine to the transmission. When the clutch pedal is depressed, the clutch pressure plate leaves the flywheel, cutti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/06C22C33/08C21C1/08
CPCC22C37/10C21C1/08C22C33/08C22C37/06
Inventor 谢剑云胡宏王善南
Owner NINGBO HONGXIE CLUTCH
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