钢化

The strength of HSLA steel with ferritic plus pearlitic mierostruetures has attained the limited value of 450～500MPa by traditionally microalloying treatment and TMCP. In order to further improve the strength grade, low carbon bainitic steel plates should be developed.

通过采用形变热处理工艺和微合金化，在保证高韧性和优异的焊接性能的条件下，具有铁素体珠光体组织的低碳低合金高强度钢的屈服强度可以达到500～550MPa的极限水平。

This can make not only the outside, but also the inside of the panels be phosphated.

这样可以使钢地板的内外表面全部都得到磷化。

The Faculty of Construction concentrates primarily on the following research areas: Stability of Space Structure Unit, Analysis Methods and Design of Engineering Structure, Application of Compound Material to Civil Engineering, the Application of Finite Characteristic Ratio theory in Soil Mechanics and Application of Local Deformation and Stress Path to Poor Foundation Improvement, The Reliability Analysis and Health Monitoring of Long-span Bridge, and PIRO controlled Rock Blasting.

建设学院在一些技术领域形成了自己的特色和优势，主要研究方向为(1)空间钢结构体系的稳定理论与应用；（2）工程结构的计算分析与设计方法；（3）复合材料在土木工程中应用；（4）橡胶复合材料的力学性能与轮胎结构力学；（5）钢筋混凝土结构现场检测技术；（6）岩土有限性特殊比理论及应用、变形局部化、应力路径问题和软地基处理的理论及应用；（7）大跨度桥梁运行可靠性分析及健康检查。

It was also found that Nb+Ti microalloyed steel(0.02%Nb＋0.012%Ti ) is more difficult to recrystallize when coiled at 600℃.

低温（600℃）卷取时，铌钛复合微合金化钢的退火再结晶更难，800℃×30s连续退火可以保证完全再结晶。

Through a series of quenching, tempering, tensile testing, low-temperature impact test and metallographic analysis, we ultimately came to the following conclusions:(1) low-carbon alloyed steel 20CrMn2NiMoV quenching at 870℃ and tempering at 200℃, whose structure contains tempered dislocation lath martensite and few small bainite under mixed, has the best obdurability;(2) Carbon Steel 45CrMn2NiMoV quenching at 850℃ and tempering at 620℃, whose structure is sorbitic, has a performance less than that of low-carbon Alloyed steel, but it can also meet the basic design requirements.(3) Mn can substitute for the role of Ni within limited extent.

通过一系列淬火、回火、拉伸试验、低温冲击试验以及金相分析，最终得出以下主要结论：（1）低碳合金钢20CrMn2NiMoV经870℃淬火+200℃回火，得到回火位错型板条马氏体+少量细小下贝氏体的混合组织，具有最佳的强韧性配合；（2）中碳合金钢45CrMn2NiMoV经850℃淬火+620℃回火，得到回火索氏体组织，综合性能虽然不及低碳合金钢，但也能基本满足设计要求；（3）Mn在一定程度上能够替代Ni的作用，适量的Mn和Ni相互配合可以得到最佳的低温韧性，因此&以Mn代Ni&是低温钢材料研究开发中一条可行的适合我国资源状况的合金化思路。

The inhibitive effect of each sulfourea and cetylpyridinium bromide and their synergistic inhibitive effect on 16Mn steel under thin electrolyte film with H2S were investigated by using potentiodynamic polarization technique and EIS.

用极化曲线和交流阻抗技术研究了硫脲和溴化十六烷基吡啶在复配前后对含H_2S 薄层液膜下的16Mn钢的缓蚀行为，得到了一些重要结论，并对其进行解释和讨论。

With the material of synthetic graphite and natural graphite, the product has high absorption rate and speed after high temperature graphtized treatment. It can be used to add carbon to melted steel or iron whilie smelting.

本产品采用人工或天然石墨，经高温石墨化处理而成，具有吸收率高、吸收速度快的特点，适用于钢、铁冶炼时，钢水的电炉内增碳。

To treat, combine, or impregnate with carbon, as when casehardening steel.

使渗碳，碳化使与碳一起处理，使与碳混合或使充满碳，如将钢的表面粹火硬化

To harden the surface of.To treat, combine, or impregnate with carbon, as when casehardening steel.

使渗碳，碳化使与碳一起处理，使与碳混合或使充满碳，如将钢的表面粹火硬化

The influence of composition and temperature on the coarsening rate was also investigated by simulations.

本文也模拟了成分和温度变化对H13钢中M23C6粗化的影响。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了