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1)  45# steel
45#钢
1.
In order to meet the needs of markets,the 45# steel slab whose section is 200mm×1400 mm had been manufactured in the No.
为满足市场需求,自2004年下半年开始济钢第一炼钢厂4#板坯连铸机开发生产断面200mm×1400mm的45#钢钢坯,热送中板厂和中厚板厂轧制厚规格钢板。
2.
Based on the true stress-true strain curves of 45# steel under three kinds of heat-treated conditions obtained at strain rates from 10-3s-1~103s-1 by means of material test system(MTS) and split Hopkinson pressure bar(SHPB),the undetermined coefficients of the Johnson-Cook constitutive relations were fitted with least squares theory,and the strain rate hardenability value was corrected.
基于45#钢3种不同热处理状态的材料测试系统(MTS)和Hopkinson不同加载条件(应变率10-3~103/s)下的真应力-真应变曲线,利用最小二乘法拟合了Johnson-Cook本构关系中的待定参数,修正了应变率硬化指数,拟合的本构关系参数的计算值与实验数据比较,吻合很好。
3.
The microstructure and properties of CoCrW-NiP composite coating for the surface of 45# steel have been investigated.
研究了45#钢表面火焰喷涂和电沉积CoCrW-NiP复合涂层的组织和性能。
2)  45~# steel
45#钢
1.
While argon is being blown into the molten steel container 45~# steel plank ingot is produced in course of converter smelting and continuously casting carbon steel.
采用转炉冶炼一钢包吹氩-连铸生产板坯45#钢
2.
Three kinds of anti-wear coatings of 1Cr13, 3Cr13 and T8 were made on 45~# steel by arc spraying.
采用电弧喷涂法在45#钢表面制备了1Cr13,3Cr13,T8三种防磨损涂层,通过硬度、强度、磨损试验性能测试、用碳硫分析仪检测其碳元素含量及在金相显微镜上观察其组织形貌的方法,对3种涂层的性能给出了综合评价。
3.
The surface modification of 45~# steel bombarded by high-current pulsed electron beam was studied and microstructure and surface modification were analysed and discussed.
利用强流脉冲电子束对45#钢进行了表面改性处理,并对其显微组织和改性机制进行了分析和讨论。
3)  45 steel
45#钢
1.
By analysis of 45 steel heat treatment property,the traditional quenching heating pattern and cooling medium for 45 steel heat treatment are changed,which effetively controls quenching crack and heightens heat treatment quality.
分析了45#钢材料热处理特性,改变了传统45#钢热处理淬火加热方式及冷却介质,有效控制了45#钢热处理淬火裂纹,提高了45#钢热处理质量。
4)  steel 45
45钢
1.
Microstructure and Property of Plasma Immersion Ion Implanted Layer in Steel 45;
45钢等离子体浸没式离子注入层的组织与性能
2.
The relationship between magneto-vibration and magnetic treatment induced tensile residual stress reduction in the steel 45 was studied.
研究了45钢脉冲磁处理过程中残余拉应力与磁致振动之间的相互作用关系。
3.
After steel 45 is superficially consolidated with alloy powder WC.
通过对45钢采用预引入法涂敷WC、Co、TiC、Ti、N i、N iCr、Cr2C3、B4C等合金粉末进行表面强化,分析了强化后的表面性能,结果表明,经处理后的材料回火稳定性、表面硬度和耐磨性等均显著提高,使其可替代模具钢制造部分模具工作零件。
5)  45 steel
45钢
1.
Effect of induction hardening on rolling wear properties of 45 steel;
表面感应淬火对45钢滚动磨损特性的影响
2.
Design of Die for 45 Steel Valve Body in Extruded Casting;
45钢阀体挤压铸造模具设计
3.
Result analysis of the CCT curve 45 steels measured by Gleeble 1500;
Gleeble1500测定45钢CCT曲线的结果分析
6)  45 carbon steel
45钢
1.
The effect of heating temperature for recovering fatigue damage on accumulated fatigue life of 45 carbon steel has been investigated.
通过试验研究了恢复加热温度对45钢疲劳损伤后累积疲劳寿命的影响。
2.
In order to describe the cyclic softening behavior of materials more exactly,a cyclic plastic constitutive model was proposed based on the deformation character of quenched-tempered 45 carbon steel under symmetrical and unsymmetrical cyclic loadings.
为了更好地描述材料的循环软化行为,基于调质处理的45钢在对称与非对称应变循环加载下的变形特征,建立了其循环塑性本构模型。
补充资料:45钢和40Cr钢调质的热处理工艺
45钢40Cr钢调质                         
    调质是淬火加高温回火的双重热处理,其目的是使工件具有良好的综合机械性能。
    调质钢有碳素调质钢和合金调质钢二大类,不管是碳钢还是合金钢,其含碳量控制比较严格。如果含碳量过高,调质后工件的强度虽高,但韧性不够,如含碳量过低,韧性提高而强度不足。为使调质件得到好的综合性能,一般含碳量控制在0.30~0.50%。

    调质淬火时,要求工件整个截面淬透,使工件得到以细针状淬火马氏体为主的显微组织。通过高温回火,得到以均匀回火索氏体为主的显微组织。小型工厂不可能每炉搞金相分析,一般只作硬度测试,这就是说,淬火后的硬度必须达到该材料的淬火硬度,回火后硬度按图要求来检查。 

工件调质处理的操作,必须严格按工艺文件执行,我们只是对操作过程中如何实施工艺提些看法。


   1、 45钢的调质
   45钢是中碳结构钢,冷热加工性能都不错,机械性能较好,且价格低、来源广,所以应用广泛。它的最大弱点是淬透性低,截面尺寸大和要求比较高的工件不宜采用。


   45钢淬火温度在A3+(30~50) ℃,在实际操作中,一般是取上限的。偏高的淬火温度可以使工件加热速度加快,表面氧化减少,且能提高工效。为使工件的奥氏体均匀化,就需要足够的保温时间。如果实际装炉量大,就需适当延长保温时间。不然,可能会出现因加热不均匀造成硬度不足的现象。但保温时间过长,也会也出现晶粒粗大,氧化脱碳严重的弊病,影响淬火质量。我们认为,如装炉量大于工艺文件的规定,加热保温时间需延长1/5。


   因为45钢淬透性低,故应采用冷却速度大的10%盐水溶液。工件入水后,应该淬透,但不是冷透,如果工件在盐水中冷透,就有可能使工件开裂,这是因为当工件冷却到180℃左右时,奥氏体迅速转变为马氏体造成过大的组织应力所致。因此,当淬火工件快冷到该温度区域,就应采取缓冷的方法。由于出水温度难以掌握,须凭经验操作,当水中的工件抖动停止,即可出水空冷(如能油冷更好)。另外,工件入水宜动不宜静,应按照工件的几何形状,作规则运动。静止的冷却介质加上静止的工件,导致硬度不均匀,应力不均匀而使工件变形大,甚至开裂。


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