采用内耗仪和拉伸试验机研究了不同工艺参数(卷曲温度、退火温度、缓冷温度)对超低碳烘烤硬化钢(ULC-BH钢)的固溶碳含量和烘烤硬化性能的影响。结果表明：卷曲温度对ULC-BH钢的固溶碳含量和烘烤硬化值(BH₂值)影响较小；随着退火温度升高(780～840 ℃)，ULC-BH钢的固溶碳含量和BH₂值逐渐增大，固溶碳含量增幅为2×10^-6～3×10^-6；随着缓冷温度升高(650～710 ℃)，ULC-BH钢的固溶碳含量和BH₂值逐渐降低，固溶碳含量降幅约为1.5×10^-6。

The effects of different technical parameters (crimping temperature, annealing temperature, slow cooling temperature) on the solid solution carbon content and bake hardening properties of ultra-low carbon bake hardening (ULC-BH) steel were studied by internal friction instrument and tensile testing machine. The results show that the crimping temperature has little effect on the solid solution carbon content and bake hardening value (BH₂ value) of the ULC-BH steel. With the increase of annealing temperature (780-840 ℃), the solid solution carbon content and BH₂ value of ULC-BH steel gradually increase, and the increase of solid solution carbon content is 2×10^-6-3×10^-6. With the increase of slow cooling temperature (650-710 ℃), the solid solution carbon content and BH₂ value of ULC-BH steel gradually decrease, and the decrease range of solid solution carbon content is about 1.5×10^-6.