金属学报  1956, Vol. 1 Issue (3): 265-277

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硼-钼合金结构钢的研究

祁明维;李林;黄松怀;周德庆;沈德鑫

中国科学院冶金陶瓷研究所;中国科学院冶金陶瓷研究所;第一机械工业部上海综合试验所;第一机械工业部上海综合试验所;第一机械工业部上海综合试验所

AN INVESTIGATION OF BORON-MOLYBDENUM CONSTRUCTION STEEL

CHI MIN-WEI AND LI LIN Institute of Metallurgy and Ceramics;Academia Sinica

祁明维;李林;黄松怀;周德庆;沈德鑫. 硼-钼合金结构钢的研究[J]. 金属学报, 1956, 1(3): 265-277.
, , , , . AN INVESTIGATION OF BORON-MOLYBDENUM CONSTRUCTION STEEL[J]. Acta Metall Sin, 1956, 1(3): 265-277.

摘要 参考文献 相关文章 Metrics 全文: PDF(1823 KB)   摘要: <正> 低碳硼-钼钢经过锻造及正火处理后,抗拉强度可以达到60千克/毫米~2以上,屈服强度可达到48千克/毫米~2以上,比不含合金的低碳结构钢的机械强度超过一倍,同时仍保持有较好的展性及韧性.硼-钼钢有良好的焊接性能,可建议作高强度低合金结构钢应用.硼促进0.50%钼钢机械强度增加的原因,是在正火处理后改变了金相组织中的珠光体与铁素体的分布情况.如金相组织中含有细致分散的珠光体及针状铁素体,可以得到 Abstract：Laboratory melting of low carbon boron-molybdenum steels was successivelycarried out in high frequency furnace.It was found that the steel after forging andnormalizing treatment,a maximum stress of more than 60 kg/mm~2 and a yield stressof more than 48 kg/mm~2 can be obtained.The value of yield stress is more thandouble the yield stress obtained from unalloyed low carbon construction steels andthe steel at the same time retaining good ductility and toughness.The welding pro-perry of the boron-molybdenum steel was found to be good and this steel is recom-mended to be used as a high strength low alloy construction steel.The effect of boron in increasing the mechanical strength of 0.50% molybde-num steel was found to be due to the alteration of the carbide and ferrite dispersionin the microstructure after the normalizing treatment.High maximum and yieldstresses can be obtained from a microstructure consisting of a mixture of fine disper-sed pearlite and acicular ferrite,and the microstructure of the boron-molybdenumsteel is markedly influenced by the normalizing temperatures and cooling rates.By studying the effect of boron on the decomposition of austenite,it was found thatboron greatly retarded the formation of proeutectoid ferrite and pearlite,thus in-creasing the hardenability of the steel.Thus even at relatively slow cooling rates,a high mechanical strength can be still obtained from the boron-molybdenum steel.Calculation according to empirical formulae from the isothermal transformationdiagram of the boron-molybdenum steel shows that at a normal air cooling rate,the maximum diameter of the steel bar which can be used to obtain high me-chanical strength must not exceed 75.2 mm. 收稿日期: 1956-03-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 祁明维 李林 黄松怀 周德庆 沈德鑫 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1956/V1/I3/265 [1] Bardgett,W.E.and Reeve,L.,Mechanical Properties of Low-carbon,Lowalloy Steels containing Boron,J.I.S.I.,163(1949) ,pp,277-294． [2] Lorig,C.H.and Adams,R.R.,Copper as an Alloy Element in Steel and Cast Iron,chapter VI. [3] Mehl,R.F.,The Decomposition of Austenite by Nucleation and Growth Processes,J.I.S.I.,159(1948) ,No.II,pp.113-128． [4] #12 [5] Grange,R.A.and Kiefer,J.M.,Transformation of Austenite on Continuous Cooling and its Relation of Transformation at Constant Temperature,A.S.M.,29(1941) ,p,85． [6] French,H.J.,A Study of the Quenching of Steels,A.S.S.T.,17(1930) ,pp.669-678． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed