二次硬化

高速钢中马氏体二次硬化的TEM研究

TEM study of secondary hardening of martensite in high speed steel

高温硬度试验证明二次硬化效果是由M（23）C6碳化物形成引起的。

The results of the hardness test prove the effect ot secondary hardening in cau - sed by forming M_ ( 23 ) C_6 carbides .

Co对高Ni-Co二次硬化钢微结构影响的穆斯堡尔谱研究

Influence of Co on Microstructure of High Ni-Co Secondary Hardening Steel by Mossbauer Spectroscopy Study

二次硬化合金钢中多组元强化相M2C碳化物的粗化动力学研究

Coarsening kinetics of multi-component m_2c precipitates in secondary hardening alloy steels

二次硬化效应与残余奥氏体在回火过程中转变为马氏体和马氏体基体中析出细小弥散的Mo2C和VC有关。

Secondary hardening is related to the transformation of the residual austenite into martensite and the precipitation of the fine and dispersed Mo_2C and VC .

高Co-Ni二次硬化钢的电子结构及合金化行为

Electronic structure and alloy behaviors of high Co-Ni secondary hardened martensitic steels

用穆斯堡尔谱研究了钴含量对高Ni-Co二次硬化钢微结构的影响。

The influence of Co on the microstructure of high Ni Co secondary hardening steel was studied by Mossbauer spectroscopy .

利用透射电镜和化学相分析研究了降低Nb，V，Ni含量以及添加Mn对HD钢二次硬化的影响。

With the help of TEM and chemical phase analysis , the author researched the influence of alloying elements Nb , V , Ni and Mn on secondary hardening in hot work die steel .

高Co-Ni二次硬化钢性能预测及多指标优化

Application of artificial neural networks to the performance prediction and optimization of high Co-Ni secondary hardening steel

高Co-Ni二次硬化马氏体钢中合金元素对相变的影响

Effect of Alloying Elements on the Phase Transformation for Secondary Hardening Martensite Steels Enriched Co and Ni

研究结果表明，降低Nb，V，Ni后对二次硬化温度影响不大，但硬度升高。添加Mn可使二次硬化温度提前，并使硬度进一步升高。

The results showed that the secondary harden temperature without much change and the hardness increased after reducing Nb , V and Ni , but the temperature lowered and the hardness further increased after Mn added .

本文阐述了催化剂性能与CNG燃料车性能匹配的系统化试验过程及结果。采用模拟退火算法对高Co-Ni二次硬化钢的性能进行了多指标优化。

The experiment process and results as well as catalyst performance optimized under different CNG fuel vehicle operationg condition were described in this paper .

实验结果表明，贝氏体的二次硬化机制和马氏体一样，主要是由Mo2C，V4C3，NbC等细小弥散的合金碳化物析出造成的。

It was shown that the secondary hardening of bainite is similar to martensite , mainly formed by precipitation of fine dispersed carbides such as Mo_2C , V_4C_3 , NbC , etc.

将人工神经网络用于建立高Co-Ni二次硬化钢的性能预测模型。

Artificial neural networks have been used to establish the model of property for high Co Ni secondary hardening steel .

结果表明，奥氏体转变温度在840℃～850℃，Ms点在190℃～230℃之间，回火时在500℃左右有明显的二次硬化现象。

The results show that the critical point for austenite transformation of the steel is about 840 ℃~ 850 ℃, and the Ms point is between 190 ℃~ 230 ℃, the steel shows apparent secondary hardening at about 500 ℃ during tempering .

相分析结果研究表明：D601根据平衡碳原理设计的合金元素含量，使其获得了良好的二次硬化效果。

It was shown by experiment that D601 composition design based on the balance carbon concept gives it high secondary hardness .

合金工模具钢Fe-M-C淬火马氏体回火的二次硬化研究进展

Advance in Research of Tempering Secondary Hardening of Alloy Tool and Die Steel Fe-M-C Quenched Martensite

结果表明：H13钢在300℃～630℃温度范围内回火，显微组织经历了由回火马氏体组织向回火托氏体组织的转变过程，在520℃左右出现二次硬化峰。

The results show that the microstructure transforms from temper martensite to temper troostite when the temper temperature is from 300 ℃ to 630 ℃, and the peak of secondary hardening appears at about 520 ℃ .

在实验数据的基础上，利用人工神经网络建立高Co-Ni二次硬化钢的力学性能与合金成分及热处理温度对应关系的模型。

On the basis of experimental data , artificial neural network is used to construct the model of relationship between mechanical properties and alloy elements as well as heating treatment temperature for high Co-Ni secondary hardening steel design .

因此，为保证回火时有足够的M2C型二次硬化碳化物析出，最佳淬火温度为1050～1100℃，保温时间为30～60min。

Therefore , in order to ensure an effective precipitation of the M 2C type secondary hardening carbides during tempering , the optimum quenching temperature for the current steel is about 1050 ~ 1100 ℃, with holding time of 30 ~ 60min .

二次硬化钢的晶间析出和断裂特征

Behaviors of Grain Boundary Segregation and Fracture in Secondary Hardening Steel

新型二次硬化高Co&Ni超高强度钢强韧化机制的研究

On the strengthening mechanism of high Co Ni ultrahigh strength steel

国外几种二次硬化型高断裂韧性超高强度钢

Several secondary hardening high fracture toughness ultra high-strength steels abroad

高铬冷作模具钢渗碳层的二次硬化特征

Secondary Hardening Feature of Carburized Layer in High Chromium Cold-work Die Steel

二次硬化马氏体时效钢中纳米级强化相的分析

Analysis of Nanometer-Sized Strengthening Phase in Secondary-Hardening Martensite Steel

无钴二次硬化超高强度钢合金设计

Alloy design of cobalt-free secondary hardening ultra-high strength steel

试验钢在560℃左右回火时出现二次硬化峰；

The secondary hardening peak presents at 560 ℃ .

高合金二次硬化钢氢脆敏感性研究

Investigation on Hydrogen Embrittlement Behavior in High Alloy Secondary hardening Ultrahigh Strength Steel

550℃回火时产生二次硬化。

Secondary hardening will appear at 550 ℃ .

高速钢中贝氏体的二次硬化特征

Secondary hardening of bainite in high speed steel