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一、前言 16Mnq钢板是用于大型桥梁的高强度钢,其检验指标既多又高,而且指标之间有的相互制约,良好的综合机械性能所要求的成分、工艺波动范围小,冶炼及轧制的难度大。为了满足用户C+Mn/6+Si/24≤0.44的焊接要求,以往把碳含量内控在0.12～0.17％,因而出现了一定量的σ_s、σ_b达不到标准要求。1983年轧制的11202t16Mnq板中,强度不合改钢的占总量的5.4％。本文通过对生产数据的回归分析及轧制工艺的试验,讨论了成分及工艺对强度的影响,探讨了提高16Mnq强度的途径。
I. INTRODUCTION 16Mnq steel plate is a high-strength steel used for large bridges. Its inspection indexes are both high and high, and there are mutual restraints between the indexes. The components required for the good comprehensive mechanical properties, the small fluctuation range of the process, the smelting and rolling System difficult. In order to meet the welding requirements of C + Mn / 6 + Si / 24≤0.4, the carbon content was controlled within 0.12 ~ 0.17% in the past, so a certain amount of σ_s appeared and σ_b did not meet the standard requirements. In the 11202t16Mnq plate rolled in 1983, the strength of the steel does not make up 5.4% of the total. Through the regression analysis of the production data and the experiment of the rolling process, the influence of composition and process on the strength is discussed, and the ways to improve the strength of 16Mnq are discussed.