汽车排气系统模具的热处理与表面改性研究

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中图分类号：TP525 文献标志码：A

Abstract： The exhaust system not only reduces pollutants and noise generated by automobiles but also enhances airflow dynamics through pipe adjustments， thereby improving vehicle performance. As the foundation for producing exhaust systems， the performance of molds directly affects the quality of system castings. This study investigates the heat treatment process of molds to modify their surface properties.First，molds for the catalytic converter， bellows，and muffler were designed individually and modeled using UG software through mesh division to complete the exhaust system mold. Subsequently， the heat treatment of the combined’ mold was completed by determining quenching and tempering temperatures， calculating holding times，and conducting quality testing and post-treatment. The results indicate that when the preheating temperature is 800-830°C ，the quenching temperature is 960-1000° ，the first tempering temperature is 600∘C ， and the second tempering temperature is 560∘C ，the molds exhibit optimal hardness and corrosion resistance.

Key words： exhaust system; automotive performance;mold performance; system casting; UG software

0 引言

随着经济的快速发展，汽车已是广泛普及的交通工具。（剩余11034字）