Homogenization evaluation method for hardenability of Ti-containing carburizing steel

By employing a homogenization evaluation method involving multi-point sampling and hardness testing of Ti-containing carburized steel, the problem of inaccurate hardenability bandwidth detection in existing technologies is solved. This method enables accurate evaluation of Ti-containing carburized steel materials, ensuring part quality and meshing accuracy, and is applicable to shaft and gear parts.

CN121049073APending Publication Date: 2025-12-02WUHAN UNIV OF TECH
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Patent Information

Application Number
CN202511186447.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-24
Publication Date
2025-12-02

AI Technical Summary

Technical Problem

Existing technologies cannot accurately evaluate the hardenability bandwidth of Ti-containing carburized steel, resulting in the inability to effectively reflect the material composition inhomogeneity, which affects the heat treatment deformation and meshing accuracy of parts, and fails to meet the quality requirements of advanced international standards.

Method used

A homogenization evaluation method for the hardenability of Ti-containing carburized steel is proposed. By sampling and hardness testing at multiple points on Ti-containing carburized steel round bars of different specifications and porosity and segregation levels, including sampling at the center, eccentric and concentric parts, and combining end hardenability test, the scientificity and accuracy of the test results are ensured.

Benefits of technology

It enables accurate evaluation of the hardenability bandwidth of Ti-containing carburized steel, which can truly reflect the uniformity of the material, reduce the risk of substandard parts production, and is applicable to shaft and gear parts with different size characteristics and performance requirements.

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Abstract

The invention relates to the field of materials and processes for automobile parts, in particular to a homogenization evaluation method for hardenability of Ti-containing carburizing steel and application. According to different specifications and different looseness and segregation levels of the round steel, sampling regulation is carried out on the center part and the center part of the section of the Ti-containing carburizing steel round steel, and the hardenability and the hardenability bandwidth of the carburizing steel can be more truly reflected. When the hardness of the tail end hardenability sample is detected, two surfaces equidistant from the circle center of the section of the round steel are detected, a telecentric surface far away from the circle center of the section of the round steel and a proximal surface close to the circle center of the section of the round steel are detected, and compared with the current national standard, the detection result is more scientific and accurate. The method can be applied to almost all carburized steel bars with large component fluctuation, the uniformity is truly reflected, technicians can select raw materials with proper hardenability bandwidth to be applied to shaft gear parts with different size characteristics and using performance requirements, and the application prospect is very wide.
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