钢种

The results indicate that bainite can be formed in a wide range of cooling rates from 1℃/s to 25℃/s. The beginning transformation temperature is 557~651℃.

结果表明，所研究钢种在1~25℃/s的冷却速度范围内均可得到贝氏体组织，其贝氏体开始转变温度为557~651℃。

That is to say, the surface of the ferritic stainless steel is a lager of poor chromium and rich silicon.

贫铬层的存在大大降低了该钢种的耐蚀性，且使其表面光泽度变差〔1〕，难应用于对耐蚀和美观要求较高的场合。

So it is regarded as research benchmark for the development of new ferritic heat-resistant steels with higher application temperature.

T91(9Cr-1Mo-V-Nb-N)钢是高Cr铁素体耐热钢的代表钢种，广泛用于超临界发电厂锅炉管道上；同时也是开发更高使用温度的铁素体耐热钢材的研究基准。

The ferritic stainless steel to be analyzed and carbon rods were used as anode and cathode, respectively.

铁素体不锈钢为不淬火钢种，热处理时只采用退火处理。

A new gauge control method for plate head was developed.For the plates of different steel grade and different dimensions,the plasticity coefficient is calculated, and gauge compensation for plate head is automatically adjusted.Adopting the exponential compensation curve,the gauge deviation is allowable after cropping, and metal yield can be improved.

在此基础上开发了一种新型头部厚度控制的方法，可以在不同钢种和不同规格的轧制条件下，利用轧制过程实际数据，进行轧件塑性系数计算，自动修正头部沉入量；采用指数型补偿曲线，使钢板切头之后成品厚度尺寸达标并且切头质量减少，提高了产品的成材率。

HRB400 steel bars, the 400 MPa hot rolled steel bar, which is called new grade III steel bar, has been taken as the one of 10 new technical spreading the application mainly, listed in revised newly code, so spread application as leading steel bar in reinforced concrete structure.

HRB400级钢筋已作为高效钢筋被列为重点推广应用的建筑业10项新技术之一，早在1998年建设部就明确提出：&新Ⅲ级钢筋是专门为建筑结构应用开发的新型钢筋，该钢种已列入新修订的国家规范标准，应大力推广使之成为我国钢筋混凝土结构的主导钢筋&(建设部建[1998]200号文)。

Q235 and 20MnSi billets are tested to produce BS 460MPa grade reinforced bar with postrolling residual heat treatment process. Influences of water-cooling stage, water pressure, the temperature at the entrance of cooling bed, compositions, steel grade and ageing on reinforced bar properties are studied.

以Q235、20MnSi钢坯为原料进行了用余热处理工艺生产英标460MPa级钢筋的试验，研究了水冷段数、水压、上冷床温度以及成分、钢种和时效对钢筋性能的影响。

cast hot-work die steel ; heat treatment process ; impact toughness and hardness

本文中采用 RE- Nb作为变质剂，对该钢种进行处理，并采用不同的高

Baosteel Group,through analyzing the plate's texture,metallurgical structure,grain orientation,hardening index,plane plastic strain ratio and cold forming performance with different aluminum content s,influence of aluminum on plate's processing properties has been discussed from the angle of the product's microstructure.

以宝钢梅山公司的SPCC典型钢种为例，通过对不同铝含量板卷织构、金相组织、晶粒取向、硬化指数、平面塑性应变比、冷成型性能试验的分析，从微观结构的角度探讨铝对工艺性能的影响。

Key words :uncertainty evaluation; reduced molybdenum spectrophotometric method; stainless steel; silicon

国家标准钢铁及合金化学分析方法中对硅的测定[8]，一般适用于铁、碳钢、低合金钢等钢种。

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。