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采用缺口试样慢拉伸试验研究了高强度钢在镀铬和电解酸洗后的断裂行为及其吸氢、放氢规律。结果表明,高强度结构钢经电解酸洗和镀铬后都有显著渗氢,且镀铬后的渗氢量高于电解酸洗;镀铬渗入的氢经180℃去氢处理后仍有1.5~3.0 ml/100g的残存量,残存氢的多少与钢种和组织状态有关,高锰钢、硅锰钢和铬锰钢的存氢量高于铬镍钢;电解酸洗或镀铬渗入的氢与残余应力相作用,导致材料产生氢损伤及钢的缺口强度大幅降低。
The tensile test of notched specimens was used to study the fracture behavior of high strength steel after chrome plating and electrolytic pickling and the hydrogen absorption and desorption laws. The results show that both high-strength structural steel has significant hydrogen permeation after electrolytic pickling and chrome plating, and the amount of hydrogen permeation after chrome plating is higher than that of electrolytic pickling. Hydrogen infiltrated by chromium plating still has 1.5-3.0 ml / 100g of residual amount of residual hydrogen and the number of steel and the state of the organization, high manganese steel, silicon manganese steel and chromium manganese steel hydrogen storage capacity is higher than the chromium-nickel steel; electrolytic pickling or chromium penetration of hydrogen and residual stress Phase effect, resulting in hydrogen damage to the material and greatly reduce the notch strength of steel.