钢种

Through comparing and analyzing the characteristic values under different experiment tempera- ture,the micro-fracture changement sit...

通过对各个实验温度下的特征值进行比较分析，掌握了材料微观断裂过程的变化情况，为采取相应措施，提高该钢种的低温冲击性能提供了依据。

All kinds of bearing steel production technologies have been researched contrastively.

轴承钢是特殊钢中最具代表性的钢种，其服役工作条件恶劣，要求高的服役寿命。

It is indicated that the sinter and dust powder show better desiliconization effect,and it is difficult to bring the desiliconization capability of the rich ore and scale bearing higher oxygen content into full play for its lower basicity.

以铁水脱硅为中心的全面铁水预处理技术正在迅速发展，这对开发新钢种、冶炼纯净钢、提高转炉生产能力、降低成本具有重要意义[1]。

The author analyzed total oxygen content, nitrogen content in steel made by typical process and the inclusion composition, change rule, morphology and distribution qualitatively and quantitatively by image analyzer, big sample electrolysis, SEM and energy spectrum analysis. The results showed that final inclusion form was small granule MnS, calcium aluminate, a small quantity of silicate and lumpy Al2O3. By intensifying deoxidation alloying process control in converter, argon blowing and slagging control and desulphuration and calcium reduction operation in refining course and overall-protection casting, the oxygen content was reduced by 20% above averagely, nitrogen content was reduced by about 10% and the inclusion content was reduced by 30%.

通过全O、N分析，夹杂物图像分析仪、大样电解、扫描电镜及能谱分析，定性和定量分析了典型工艺钢种钢中全O、N含量和工序过程夹杂物的构成、变化规律及形态、分布，分析钢中最终夹杂物表现形式主要为小颗粒的MnS、铝酸钙、少量的硅酸盐和块状Al2O3，通过强化转炉脱氧合金化工艺控制、精炼过程吹氩与造渣控制及脱硫和钙处理操作、全程保护浇注，钢水中O含量平均降低20％以上，N含量降低10％左右，铸坯中夹杂物含量降低了30％。

In order to adapt the rhythm of the continuous casting, No.3 Steelmaking Plant of Jigang optimizes specific iron and steel structure, increases the percentage of goal hits of the converter, optimizes LF slag-making and argon blowing processes and intensifies LF deoxidation and desulphuration etc, shortening refining period 17min, reducing he electric consume 6.7kW.h/t.

为适应连铸节奏，济钢第三炼钢厂通过优化钢铁料结构、提高转炉终点命中率、优化LF造渣及吹氩工艺、强化LF脱氧、脱硫等措施，缩短精炼周期17min，降低精炼电耗6.7kW.h/t，满足了高附加值钢种的工艺要求并实现了多炉连浇。

By dilatometric test, Laboratory experiments were...

利用膨胀法在Thermecmastor-Z型热/力模拟试验机上进行实验室实验，测定了研究钢种在不同的中间保温工艺及一定变形工艺条件下的过冷奥氏体连续冷却转变曲线；对每个试样进行了打磨、抛光、腐蚀，在光学显微镜下观察其组织，研究了在不同中间保温工艺下组织的变化情况；利用所建立的CCT曲线研究了一定变形工艺条件及不同保温工艺对其相变行为及组织的影响，对其影响规律进行了分析。

The results show that the toughness of over-heated zone increased greatly because of austenite film lying in lathy martensite and a few ferrite.The toughness of fine grained zone decreased due to many factors,such as acicular martensite,a small quantity of austenite film,carbide separation and so on.

结果表明，10Ni8CrMoV这一新型钢种的模拟焊接热影响区的过热区和细晶区表现出与绝大多数材料完全相反的规律，过热区存在少量的铁素体组织，马氏体板条束之间形成了一定量的奥氏体薄膜，这些韧度相的存在使得过热区的冲击韧度与基体相比有了较大的提高；细晶区部位奥氏体含量很少，细小的板条马氏体端部呈针状特征造成应力集中，易于诱发裂纹。

In order to improve product strength and malleableness which are suitable for subsequent(cold-rolling) process,based on condition of the workshop,rational range of cooling rates was established.

带钢热轧以后的冷却速度对于钢带的组织与性能有着极其重要的影响，钢种、板厚、终轧及卷取温度和轧制规程等都相同，只是冷却速度不同就能引起性能上的较大差别[1]。

Through comparing and analyzing the metallurgical effects, proper addition quantity of the modifier was 80 kg per heat. The experiment results showed that the modifier smelted the slag fast and reduced the oxidizability of the top-slag rapidly. Comparing with the original process, the average content of aluminum in the steel was increased by 0.06%, desulphurization ratio was increased by 89.25% and TFe was reduced by 0.6%, then stabilizing the production of aluminum containing steel.

试验中用改质剂代替原工艺中的精炼剂（Q235C钢种），通过对改质剂不同加入量的冶金效果进行对比分析，确定的改质剂加入量为每炉80 kg，试验表明，改质剂化渣快，能迅速降低顶渣的氧化性，与原工艺相比，钢中平均铝含量提高0.06%，脱硫率提高89.25%，渣中全铁降低0.6%，稳定了含铝钢的生产。

Japan＇ the mathematical model of thick control AGC are applied greatly in our country, and the feasibility and the merit of DAGC replacing with AGC are analysed, set - up system parameter are simlified, Because DAGC doesn＇ t affect with precontrol and monitor system in advance.

日本测厚计型AGC数学模型在我国引进较多，分析了DAGC代替测厚计型AGC的可行性和优点；简化了系统参数设定；由于DAGC与预控、监控系统无相互影响，所以不存在钢种变化而需要优化系统参数的问题。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。