介绍了汽车零部件硬度检测方面的新技术和新设备，包括应用于生产现场的快速硬度计、大型硬度计、专用硬度检测系统及硬度在线自动检测系统等；分析了现场硬度检测与实验室常规硬度检测的不同之处，指出检测效率是现场硬度检测的关键。实践表明：汽车零部件硬度在线自动检测系统具有很高的推广价值，可解决许多汽车零部件的硬度在线检测问题，这些系统的推广应用可提高企业的质量保证水平和产品的市场竞争力，促进企业的技术进步。

The new technology and new hardness testing equipments for automobile parts were introduced, including on-site fast hardness tester, large hardness tester, specialized hardness testing system and online automatic hardness testing system. The difference between on-site hardness testing and conventional laboratory hardness testing was analyzed, and it was pointed out that the testing efficiency was the key of on-site hardness testing. The practice shows that online automatic hardness testing system for automobile parts has very high promotion value. This system can solve many problems of online hardness testing of automobile parts. The popularization and application of this system can improve a company's quality assurance level, increase the competitive ability of products in the market, and promote the technological progress of enterprises.