首页>
外国专利>
Low-carbon precipitation-strengthened steel for cold heading applications
Low-carbon precipitation-strengthened steel for cold heading applications
展开▼
机译：低碳沉淀强化钢，用于冷precipitation应用
展开▼
页面导航
摘要
著录项
相似文献
摘要
A rolled steel wire or rod suitable for the production of cold headed products without the application of heat treating operations has a chemical composition, by weight, of:0.04% ≤ C ≤ 0.1%1.8% ≤ Mn ≤ 2.0%0.15% ≤ Si ≤ 0.30%S ≤ 0.025%P ≤ 0.025%Cr ≤ 0.50%Mo ≤ 0.08%Ni+Cu ≥ 0.30%0.01% ≤ Al ≤ 0.05%V ≤ 0.05%10 ppm ≤ B ≤ 30 ppmN ≤ 100 ppmTi ≥ 0.06%the remainder being iron and impurities resulting from the production process. The steel has a cementite-free microstructure comprising a predominant phase, a minor phase and MX-precipitations distributed within the predominant phase, the predominant phase consisting of bainitic ferrite, the minor phase comprising retained austenite and optionally martensite with a size of 2 to 3 µm, the relative amount of the minor phase amounting to 20% by volume.
展开▼
