New material for changing processed broken chip

Abstract

The invention relates to a new material for changing processed broken chip which comprises the chemical composition with the weight percentage: 6.5-7.5% of SI, 0.45-0.6% of Fe, 0.7-1.0% of Mg, Mn being more than half of Fe, 0.05% of Cu Max, 0.07% of Zn Max, 0.08-0.25% of Ti and the rest of Al. The chemical composition of the material is adjusted, so that the elongation and hardness value of cast parts are changed after heat treatment is carried out on the cast parts, thus achieving the effect of changing the difficulty of processing broken chip.

Description

technical field [0001] The invention relates to a new material for casting aluminum alloy AlSi7Mg0.9, in particular to a new material for changing chip breaking during processing, and mainly aims at changing the effect of chip breaking during processing for castings with complex inner cavity shapes. Background technique [0002] The shape design of the casting cavity of the automobile brake master cylinder type tends to be complex and diverse, and the processing speed tends to be high. The requirements for the tools used in processing, processing speed, and especially the casting material itself are extremely high. [0003] In the existing technology, during the research and development of BOSCH brake master cylinder castings, conventional A356.0 (AlSi7Mg) is used for production. In the processing process, the turning compound machining center is used for processing. The cutting tool is diamond, and the speed is 4500 rpm / MIN . At the end of the processing, due to the proble...

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Problems solved by technology

At the end of the processing, due to the problem of chip breaking, the

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