Aluminium alloy engine cast iron cylinder sleeve processing technology

A treatment process, aluminum alloy technology, applied in metal material coating process, hot-dip plating process, coating, etc., can solve the problem of wear resistance and strength damage of cast iron cylinder liner, short processing time of aluminum alloy melt and metallurgical combination To achieve the effect of improving the performance of the bonding surface, inhibiting the reaction of zinc and iron, and improving the bonding interface

Active Publication Date: 2014-07-02
烟台路通精密科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent (CN102534451A) carries out surface treatment to the cast iron cylinder liner by hot-dipping aluminum alloy, and then composite casting process makes it form a metallurgical bond with the aluminum alloy cylinder body, which effectively improves the bondin

Method used

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  • Aluminium alloy engine cast iron cylinder sleeve processing technology
  • Aluminium alloy engine cast iron cylinder sleeve processing technology
  • Aluminium alloy engine cast iron cylinder sleeve processing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Raw materials include: HT250 cast iron cylinder liner, industrial ZL101A aluminum alloy, zinc aluminum alloy and self-prepared flux (mainly composed of zinc chloride ZnCl 2 , potassium fluoride KF, potassium chloride KCl, sodium nitrate NaNO 3 , sodium nitrite NaNO 2 , ferrous dihydrogen phosphate Fe(H 2 PO 4 ) 2 and surfactant CH 3 (CH 2 ) 11 SO 3 Na).

[0031] (1) Use HT250 cast iron as the cylinder liner, the outer surface of the HT250 cast iron cylinder liner is first degreased, shot blasted or other mechanically polished to remove rust and free carbon on the surface;

[0032] (2) prepare plating flux, take by weighing zinc chloride ZnCl respectively by the mass percent of salt 45%, 24.9%, 20%, 3%, 2%, 5%, 0.1% 2 , potassium fluoride KF, potassium chloride KCl, sodium nitrate NaNO 3 , sodium nitrite NaNO 2 , ferrous dihydrogen phosphate Fe(H 2 PO 4 ) 2 , Surfactant CH 3 (CH 2 ) 11 SO 3 Na, prepare it with deionized water to make a salt solution wit...

Embodiment 2

[0039] Raw materials include: HT250 cast iron cylinder liner, industrial ZL101A aluminum alloy, zinc aluminum alloy and self-prepared flux (mainly composed of zinc chloride ZnCl 2 , potassium fluoride KF, potassium chloride KCl, sodium nitrate NaNO 3 , sodium nitrite NaNO 2 , ferrous dihydrogen phosphate Fe(H 2 PO 4 ) 2 and surfactant CH 3 (CH 2 ) 11 SO 3 Na).

[0040] (1) Use HT250 cast iron as the cylinder liner, the outer surface of the HT250 cast iron cylinder liner is first degreased, shot blasted or other mechanically polished to remove rust and free carbon on the surface;

[0041] (2) Prepare plating flux, take zinc chloride ZnCl by weighing 45%, 22%, 19.7%, 5%, 3%, 5%, 0.3% by mass percentage of salt 2 , potassium fluoride KF, potassium chloride KCl, sodium nitrate NaNO 3 , sodium nitrite NaNO 2 , ferrous dihydrogen phosphate Fe(H 2 PO 4 ) 2 , Surfactant CH 3 (CH 2 ) 11 SO 3 Na, prepare it with deionized water to make a salt solution with a concentrat...

Embodiment 3

[0048] Raw materials include: HT250 cast iron cylinder liner, industrial ZL101A aluminum alloy, zinc aluminum alloy and self-prepared plating flux (zinc chloride ZnCl 2 , potassium fluoride KF, potassium chloride KCl, sodium nitrate NaNO 3 , sodium nitrite NaNO 2 , ferrous dihydrogen phosphate Fe(H 2 PO 4 ) 2 and surfactant CH 3 (CH 2 ) 11 SO 3 Na.

[0049] (1) Use HT250 cast iron as the cylinder liner, the outer surface of the HT250 cast iron cylinder liner is first degreased, shot blasted or other mechanically polished to remove rust and free carbon on the surface;

[0050] (2) Prepare plating flux, take zinc chloride ZnCl by mass percentage 44%, 24.5%, 20%, 5%, 3%, 4%, 0.5% 2 , potassium fluoride KF, potassium chloride KCl, sodium nitrate NaNO 3 , sodium nitrite NaNO 2 , ferrous dihydrogen phosphate Fe(H 2 PO 4 ) 2 , Surfactant CH 3 (CH 2 ) 11 SO 3 Na, prepare it with deionized water to make a salt solution with a concentration of 100g / L, then immerse the ...

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Abstract

The invention relates to an aluminium alloy engine cast iron cylinder sleeve processing technology. An HT250 cast iron cylinder sleeve is immersed in a plating auxiliary with the temperature ranging from 60 DEG C to 70 DEG C after surface treatment, so that plating assistant processing is conducted on the surface of the HT250 cast iron cylinder sleeve for 6-10 min in the plating auxiliary, and then drying is conducted; the HT250 cast iron cylinder sleeve is placed in zinc-aluminium alloy melt for hot dipping after plating assistant processing, and cooling is conducted; then the HT250 cast iron cylinder sleeve is placed in aluminium alloy melt for hot dipping; the HT250 cast iron cylinder sleeve plated with aluminium alloy is taken out, and aluminium alloy melt casting is conducted; cooling is conducted, mould opening is conducted, and aluminium alloy engine cylinder body composite materials are taken out. According to the technology, the cast iron cylinder sleeve is processed through the prepared plating auxiliary, two steps of hot dipping and the composite casting technology are combined to achieve more than 99.9% of metallurgical bonding between ZL101A aluminium alloy and HT250 cast iron, and the aluminium alloy engine cast iron cylinder sleeve processing technology is simple, practical, low in cost and prominent in effect.

Description

technical field [0001] The invention relates to a process for treating aluminum alloy engine cast iron cylinder liners, which belongs to the technical field of metal material preparation. Background technique [0002] Engine lightweight, as an important part of automobile lightweight, makes aluminum alloy engines more and more widely used. In order to meet the performance and cost requirements of aluminum alloy engines, aluminum alloy cylinder blocks are generally used in the form of composite cast iron cylinder liners. Improving the bonding strength and thermal conductivity between the aluminum alloy cylinder block and the cast iron cylinder liner can further improve the engine performance, so it has always been the focus of researchers at home and abroad. At present, the commonly used assembly methods of engine block and cylinder liner include: interference mechanical fit, aluminum containing cylinder liner casting, etc. Here, the aluminum alloy cylinder block and cylind...

Claims

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Application Information

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IPC IPC(8): B22D19/04C23C2/06C23C2/12
Inventor 陈国诗张硕刘洋冯乐樊军鹏边秀房
Owner 烟台路通精密科技股份有限公司
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