淬火钢

Because harden steel be difficult to machine. but when anneal , It can be easily machine .

因为淬火后的钢很难进行加工，但退火后则很容易加工。

Steel with low carbon content will not respond appreciably to hardening treatment.

含碳量低的钢对淬火处理没有明显的反应。

In order to analyze and investigate the effect of heat treatment on delayed fracture resistance of 30MnSi PC steel bar s FIP test was adopted.

对30MnSi PC钢棒进行了淬火回火处理，分析探讨了热处理工艺对高强度钢耐延迟断裂性能的影响。

DSC and dilatometry were carried out to determine the phase transformation temperature of a high speed steel used for centrifugal cast rolls.

采用差式扫描量热法及热膨胀法测定了离心铸造轧辊用高速钢的相变点，根据高速钢的临界转变温度，进行了退火、淬火和回火实验。

Steel flat products for pressure purposes - Technical delivery conditions - Part 6: Weldable fine grain steels, quenched and tempered

压力用途扁钢产品。交货技术条件。第6部分：淬火和回火的可焊接细粒钢

The steel heat treatment method includes quenching , flash back, anneals and the shell is quenched.

钢的热处理方法包括淬火、回火、退火和壳体淬火。

The microstructure, strength-toughness and fatigue properties of an ultrahigh strength steel 40CrMnSiMoVA have been investigated. The so-called eta-bainite,composed of thin rareined austenite films within or between the bainitic ferrite laths was found in the steel after isothermally quenched at 300℃ for 1h.

本文研究了飞机起落架用超高强度40CrMnSiMoVA钢的显微组织、强韧性和疲劳性能，结果表明，该钢经300℃等温1h淬火可获得由贝氏体铁素体板条与条间或条内的残余奥氏体薄膜所组成的准贝民体组织。

Results of EBSD show that most of the reversed austenite in the steel treated by QT distribute along the grain boundary, but in the steel treated by two--phase region heat treatment the austenites distribute uniformly along all kinds of boundaries, especially also along the lath martensite boundary in the grain, so the cryogenic toughness can be also improved even the amount of austenitic is lower than that in the steel treated by QT process.

EBSD结果则表明：经两相区处理，回转奥氏体不仅在晶界和板条束界形成，也在晶内的板条界上形成，因此即便在其含量低于淬火+回火处理的条件下， 9Ni钢的低温韧性也有明显提高，证明回转奥氏体的分布也是影响9Ni钢低温韧性的一个主要因素。

The study on improving tough hardness of 65Nb steel which is used for new type cold working mould has been made.The result shows that 65Nb steel can achieve high tough hardness when it is spheroidized after full forging in fore heat treatment and is high-tempered for three times after high heat quenching in final heat treatment.

对新型冷作模具用钢65Nb 进行了提高强韧性的工艺研究，结果表明：65Nb 钢预先热处理采用经充分锻造后球化退火，最终热处理采用高温加热淬火后三次高温回火可获得高的强韧性。

The effect of heat treatment process on 60Si2Mn vehicle plate spring ' s metallurgical structure and mechanical property was analyzed , and the optimal quenching temperature of 60Si2Mn vehicle plate spring was presented.

通过试验分析了热处理工艺对60Si2Mn钢汽车板簧金相组织和力学性能的影响，提出了60Si2Mn钢汽车板簧的最佳淬火温度。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。