文章信息/Info

Title:

 Research and Development of Advanced Nano Precipitate Strengthened Ultra High Strength Steels

作者:

 焦增寶; 劉錦川

 (香港城市大學(xué)機(jī)械與生物醫(yī)學(xué)工程系 先進(jìn)結(jié)構(gòu)材料研究中心，香港 999077)

Author(s):

 JIAO Zengbao;  LIU Chain Tsuan

 (Center for Advanced Structural Materials, Department of Mechanical and Biomedical Engineering,City University of Hong Kong, Hong Kong 999077, China)

關(guān)鍵詞:

 ; 新型超高強(qiáng)度鋼; 納米析出強(qiáng)化; 合金設(shè)計(jì); 工藝優(yōu)化

文獻(xiàn)標(biāo)志碼:

A

摘要:

    隨著資源、能源和環(huán)境壓力日益加大，超高強(qiáng)度鋼的開發(fā)越來越受到世界各國的極大重視。傳統(tǒng)的超高強(qiáng)度鋼大都是依賴提高碳含量或合金元素含量而獲得較高強(qiáng)度的馬氏體或貝氏體鋼，此種鋼存在著焊接性能差、塑韌性低、鋼材尺寸受限制和成本昂貴等問題，嚴(yán)重制約了經(jīng)濟(jì)的快速發(fā)展和現(xiàn)代國防的建設(shè)，因此，開發(fā)綜合性能良好、成本低廉的新型超高強(qiáng)度鋼刻不容緩。結(jié)合當(dāng)前納米科技的發(fā)展，介紹了新型納米強(qiáng)化超高強(qiáng)度鋼的設(shè)計(jì)理念，闡述了以納米相析出強(qiáng)化為主、多種強(qiáng)化方式結(jié)合的強(qiáng)韌化理論，并總結(jié)了納米析出強(qiáng)化超高強(qiáng)度鋼在合金設(shè)計(jì)和工藝優(yōu)化等方面的初步研究進(jìn)展，最后探討了新型納米強(qiáng)化超高強(qiáng)度鋼亟待解決的問題。

Abstract:

     In view of the limited material resources and energy supply available together with serious environment impact concerns at the present time, the development of ultra high strength steels has attracted a great deal of attentions from various countries in the world. As we know, most traditional high strength steels have been developed based on martensitic and bainitic structures with high levels of carbon or high alloy additions. However, these alloys are facing many severe problems, including poor weldability, low ductility and toughness, fabrication size limitation, as well as high production cost, all of these resulting in slowdown of the economic and national�瞕efense developments in China.