鞍钢无缝钢管厂总体改造框架探讨

介绍了鞍钢无缝钢管厂发展的历程,阐述了必须对其进行技术改造的理由,提出了改造的具体原则及设想.     

钢丝圈的失效分析

对72B纺织用钢丝圈进行失效分析，发现钢丝圈使用性能不合格的主要原因是热处理炉仪表指示温度偏差太大及热处理工艺规范不合理，使得球化退火后的金相组织出现粗晶铁素体，淬火和回火后的金相组织出现铁素体、粒状渗碳体，使材料塑性增加，满足不了使用性能。     

Aspects of microstructure in low carbon steels produced by the CSP process

The solidification structure, microstructure evolution during rolling and precipitates with nanometers in dimension of the low carbon steels produced by CSP process with thin slabs have been studied in recent years. Important differences in microstructure and mechanical properties between the CSP products and the conventional one were observed. These differences may arise from the much rapider solidification rate and cooling rate after casting of the thin slabs. Some aspects of the microstructure for the low carbon steels of the CSP thin slabs are summarized and compared with the conventional one.     

Extrapolation Model of High Temperature Creep for 12Cr1MoV Steel

The creep curves of heat resistant steel 12Cr1MoV was investigated. by constant stress creep tests. The creep curves of constant stress creep are quite different from that of constant load creep. The original θ- Concept Project procedure can be validated to successfully describe the constant stress creep curves but not constant load creep. A modified θprocedure was developed. This approach can successfully described both constant stress creep and constant load creep curves. The new approach leads to a great improvement in accuracy of long term prediction of extrapolation due to validation of a great number of existing constant load creep data.     

火力发电厂工业冷却水系统工艺分析

从技术、经济和安全三个方面分析了采用不锈钢管材凝汽器的火力发电厂的工业冷却水系统，采用闭式循环工艺运行方式的合理性。     

含硼微合金钢的静态及动态软化行为

运用gleeble-1500热模拟试验机November对含硼微合金钢进行了单、双道次压缩模拟,并通过非线性回归分析得到了静态与动态软化百分比(X)与变形温度(T)、变形程度(ε)、变形速率(ε·)、原始晶粒尺寸(d0)、道次间隔时间(t)之间的关系。     

剪力环对钢管混凝土粘结强度影响的试验

通过对3根设置剪力环，3根不设剪力环，直径相同、厚度相同的试件进行研究，分析了钢管与混凝土之间的粘结性能、破坏机理，探究了影响其强度的主要因素．     

快速加热时冲压钢的再结晶特点

本文研究了冲压钢冷轧薄板在快速加热条件下的再结晶特点。结果表明．等温加热时治结晶温度随等温时间的延长而降低，连续加热时随着炉温的升高，再结晶过程所需时间缩短，而温度范围变宽。     

Effect of deteriorated microstructures on stress corrosion cracking of X70 pipeline steel in acidic soil environment

In order to investigate stress corrosion cracking (SCC) of X70 pipeline steel and its weld joint area in acidic soil environ-ment in China, two simulating methods were used: one was to obtain bad microstructures in heat affected zone by annealing at 1300°C for 10 min and then, quenching in water; the other was to get different simulating solutions of acidic soil in Yingtan in south-east China. The SCC susceptibilities of X70 pipeline steel before and after quenching in the simulating solutions were analyzed...     

提高品种钢质量推动精益化管理

介绍了湘钢以82B为代表的品种钢质量控制方面的作法与经验,以及以其为切入点,全面推行产品质量的精益化管理模式.