Method for detecting influence degree of hydrogen content of molten aluminum

Abstract

The invention discloses a method for detecting the influence degree of the hydrogen content of molten aluminum. The method comprises the following steps: a, the value of specific gravity of a sample is detected; b, a section is machined on the sample, whether a pinhole point exists on the section is observed, if the pinhole point does not exist, the hydrogen content of the sample is qualified, and the hydrogen content is unqualified if the pinhole point exists. According to the method, the section is machined on the sample after detection of the specific gravity, hydrogen is uniformly distributed through negative pressure pumping before the detection of the specific gravity, so that the distribution condition of pores formed by hydrogen after solidification of the sample can be observed directly through the section, a specific gravity parameter obtained with a specific gravity measurement method is further confirmed, the detection reliability of the hydrogen content is improved, and the potential safety hazards for hub quality control are reduced; dye penetrant inspection and / or polishing are performed on the section, the section observing reliability is further improved, and the reliability of the detection of the influence degree of the hydrogen content is guaranteed.

Description

technical field [0001] The invention relates to the technical field of hub manufacturing, in particular to a method for detecting the degree of influence of hydrogen content in molten aluminum. Background technique [0002] The wheel hub is the part of the vehicle used to connect the tire and the axle. The current wheel hub can be divided into three types: integral casting type, integral forging type and composite type in terms of manufacturing process. The integral casting type wheel hub is currently the lowest in manufacturing cost, and its output accounts for 10% of the wheel hub. About 90% of the total production. [0003] The manufacturing process of the integral cast wheel hub is to pour aluminum liquid into the mold, wait for the aluminum liquid to solidify into a solid wheel hub blank, take out the wheel hub blank and cool it, and then perform finishing operations such as heat treatment, machining, deburring, grinding, and coating. The finished product is finally ob...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for detecting the influence degree of hydrogen content in molten aluminum, which can solve the problem that the prior art only uses the specific gravity method to detect the hydrogen content of molten aluminum, and the specific gravity parameter is greatly affected by the pressure of vacuuming, which leads to the detection of The reliability is low, which makes the quality control of the wheel hub a hidden problem