20CrNi2Mo钢代替20Cr2Ni4钢用作重载齿轮材料的研究

研究了20CrNi2Mo钢的热处理工艺及力学性能,并与20Cr2Ni4钢的热处理工艺和力学性能进行了对比实验。结果表明,20CrNi2Mo钢合金元素配比合理,切削性能良好,热处理工艺简单,力学性能与同20Cr2Ni4钢接近,可以代替20Cr2Ni4钢作为重载齿轮材料。     

18Cr2Ni4WA钢复合等温淬火工艺研究

介绍18Cr2Ni4WA钢热处理复合等温淬火工艺方法以及初步的试验数据。复合等温度淬火工艺是利用18Cr2Ni4WA钢的芯部马氏体转变点Ms和渗碳后表面渗碳层的马氏体转变点Ms差异进行淬火的工艺研究。     

凿岩机钎尾30Cr2Ni4MoV钢的应用研究

介绍了钎尾用钢30Cr2Ni4MoV的化学成分、生产制造工艺及性能。结果表明,用该钢制作的钎尾,其使用帮命明显提高。     

20CrNi2Mo钢作为重载齿轮材料的热处理工艺性能分析

将20CrNi2Mo钢和低碳渗碳钢进行渗碳表面强化处理,对试样的变形,渗层的碳浓度梯度,试样的有效硬化层,试样表层的残余奥氏体含量进行对比分析,结果表明20CrNi2Mo钢作为重载齿轮材料其热处理工艺性能是合格的。     

1Cr18Ni9Ti晶间腐蚀及热处理工艺研究

对1Cr18Ni9Ti不锈钢中铁素体的形态、分布及其数量对晶间腐蚀性能的影响进行了探讨,并对如何降低晶间腐蚀及热处理工艺进行了试验研究。试验是根据1Cr18Ni9Ti材料成分组织原始状态的特点,采用对比实验的方法,以获得比较理想的铁素体含量并改善铁素体形态、分布的工艺方法。     

提高1Cr18Ni9钢耐腐蚀性的热处理方法

通过热处理实验找出不锈钢中的碳在晶界形成富铬的M21C6碳化物，使晶界附近的奥氏体贫铬，贫铬区的铬含量小于极限浓度时，就产生晶间腐蚀，增加铬的扩散时间，可提高抗晶间腐蚀的能力。     

对20CrMn2Mo钢渗碳淬火齿轮疲劳剥落与接触应力的研究

对20CrMn2Mo钢渗碳淬火后,进行了接触疲劳试验,细致观察了疲劳裂纹的产生、发展和最终发生疲劳剥落的全过程,并进行了理论分析,得出了疲劳极限方程。为渗碳淬火钢齿轮的设计提供了依据。     

1Cr18Ni9Ti晶问腐蚀及热处理工艺研究

对1Cr18Ni9Ti不锈钢中铁素体的形态、分布及其数量对晶间腐蚀性能的影响进行了探讨，并对如何降低晶间腐蚀及热处理工艺进行了试验研究。试验是根据1Cr18Ni9Ti材料成分组织原始状态的特点，采用对比实验的方法，以获得比较理想的铁素体含量并改善铁素体形态、分布的工艺方法。     

基于Deform的Cr20Ni80合金锻造过程的裂纹成因分析

为了分析Cr20Ni80电热合金锻造开裂的因素,利用Deform软件对其锻造过程进行数值模拟,并根据应力应变分析其产生裂纹的影响因素.结果表明,随着时间的推移,Cr20Ni80合金的温度逐渐降低,锻造应力逐渐增大;Cr20Ni80合金在1200℃等温条件下锻造时,其应力最大值远低于其抗拉强度650MPa,可以得到高质量锻件.为了避免微裂纹的产生,Cr20Ni80合金的锻造温度应为910~1200℃.     

影响Cr20Ni80电热合金使用寿命因素的研究现状

综述对Cr20Ni80使用寿命影响因素的研究进展.Cr20Ni80的表面氧化膜是影响其使用寿命的重要因素,氧化膜越致密,与基体粘结力越强,其使用寿命越长.Cr20Ni80合金中存在的其他元素如氮、氧、碳、硅和稀土等对其力学性能和抗氧化性能的影响是复杂的.同时也不可忽视环境介质对合金的作用.     

Research on the oxidation kinetics curve of 1Cr11Ni2W2MoV steel hot-dipped Al

1 IntroductionWith application requirments of aerial engine blade materials increasing,especially using temperature ,the neck problemof heat resistance on alloys need to be solved recently . Hot-dipped Al technology couldintroduce abundant element instead of rare metal ,and decreased the price of coating.It is appied in manyfieldsincluding chemical industry ,oil industry andtransportation[1].Inthis experi ment ,1Cr11Ni2 W2 MoVsteel was hot dipped Al-6 %Si-4 %RE In terms of testing results…     

Research on the oxidation kinetics curve of 1Cr11Ni2W2MoV steel hot-dipped Al

In this paper, 1Cr11Ni2W2MoV steel that is aerial engine blade materials was hot dipped Al-6%Si-4%RE in order to improve its application temperature. According to GB/T13303 - 91 standard, samples with coating and without coating were oxidated at 700℃ from 5 h to 600 h. Two oxidation kinetics curves were drawn in terms of data of tests. The results showed that oxidation resistance of 1Cr11Ni2W2MoV steel hot-dipped Al-6% Si-4%RE is better than one without coating. From SEM and EMPA, the surface of coating formed dense and uninterrupted α-Al2O3, which is the bars of oxidation resistance. In addition, according to one crossing point of the two curves, it was suggested that hot dipped aluminum steel should be annealed before used.     

Research on the oxidation kinetics curve of 1Cr11Ni2W2MoV steel hot-dipped Al

In this paper, 1Cr11Ni2W2MoV steel that is aerial engine blade materials was hot dipped Al-6,Si-4,RE in order to improve its application temperature. According to GB/T13303 - 91 standard, samples with coating and without coating were oxidated at 700℃ from 5 h to 600 h. Two oxidation kinetics curves were drawn in terms of data of tests. The results showed that oxidation resistance of 1Cr11Ni2W2MoV steel hot-dipped Al-6, Si-4,RE is better than one without coating. From SEM and EMPA, the surface of coating formed dense and uninterrupted α-Al2O3, which is the bars of oxidation resistance. In addition, according to one crossing point of the two curves, it was suggested that hot dipped aluminum steel should be annealed before used.     

三种常用渗碳合金钢齿轮材料的性能及热处理工艺探讨

结合实际生产需求,对17Cr2Ni2Mo、18Cr2Ni4W、20CrMnTi 3种常用的重要齿轮材料的相关性能及渗碳淬火热处理工艺特性(淬透性、参考含碳量、心部硬度的变化和热处理变形特性等)进行了探讨,为满足不同性能需求齿轮材料的选择;以及改善与优化传统热处理方案提供理论依据与实践参考。     

1Cr18Ni9Ti车削加工工艺改进

针对1Cr18Ni9Ti在切削过程中加工硬化严重、切削力大、切削温度高和切屑不易折断等原因造成的切削性能较差的特点。通过热处理以改善材料的组织,合理选择刀具材料、几何参数、切削用量和切削液等,以改进1Cr18Ni9Ti的车削加工工艺。获得了理想的切削效果,大大降低生产成本,提高了生产效率。     

DX-4对含Ni2+废水的处理研究

采用国产化工原料合成了DX-4水处理剂。研究了TDX-4用量、DX-4含硫量、pH值、反应时间对废水中Ni^2＋脱除率的影响。实验表明,DX-4处理含Ni^2＋废水效果明显,处理后废水可直接排放;残渣化学性质稳定,无二次污染。