非调质钢35MnVN强化状态的滑动磨损特性研究

研究了非调质钢３５ＭｎＶＮ强化状态的滑动磨损特性。结果表明，在滑动磨损条件下，３５ＭｎＶＮ强化状态的耐磨性优于４０Ｃｒ、４５钢调质后强化状态的耐磨性，说明在滑磨损工况下，非调质钢３５ＭｎＶＮ可以取代调质的４０Ｃｒ、４５钢使用。     

非调质钢YF45MnV的应用研究

综合了非调质钢的发展及应用概况。全面研究了国前化非调质钢ＹＦ４５ＭｎＶ的性能、应用和强韧化机理等基本情况。并与４５和４０Ｃｒ钢调质处理后的情况进行了对比,分析探讨替代的可能性和可靠性。得出一些相应的结构。     

35CrMo钢离子氮化与激光相变硬化复合处理及真耐磨性的研究

介绍了３５ＣｒＭｏ钢氮化加激光相变复合处理后组织及硬度分布的规律，并在各种工艺和材料条件下进行了滑动磨粒磨损试验。结果证明：复合处理的淬硬层深度大于非氮化激光处理的硬化层。在滑动磨粒磨损条件下，与３５ＣｒＭｏ钢氮化或激光相变硬化相比，复合工艺可获得更好的耐磨性，基本与ＧＣｒ１５钢淬火、低温回火相当。     

15MnVN代替15MnMoVNRe提高屈服强度和表面淬火硬度的研究

本文采用与工件等效截面的试样，利用１５ＭｎＶＮ钢，经调质和表面淬火后，成功地代替了１５ＭｎＭｏＶＮＲｅ钢，其屈服强度达到了Ｑ／ＣＧ０５－８０《低合金高强度结构钢技术条件》中ＱＪ６０的要求，表面淬火后硬度达到４０－４５ＨＲＣ，有效硬化层深度达到３．８ｍｍ，为１５ＭｎＶＮ钢的使用开辟了一条新途径。经采用试样的工艺方法，三种斗刃的热处理亦获得了满意的结果。     

热处理工艺对40CrMnMo钢耐磨性的影响

探讨了不同的热处理工艺所获得的各种组织状态对４０ＣｒＭｎＭｏ钢的耐磨料磨损性能的影响。结果表明：在相同的试验条件下，不同的组织状态耐磨料磨损的性能有着明显的不同。相同的组织状态，在不同的磨损条件下所表现的行为也不尽相同。     

LD1,65Nb模具钢在动态冲击载荷下的磨损特性和影响因素

通过对三种冷作模具钢ＬＤ、６５Ｎｂ和Ｃｒ１２ＭｏＶ的冲击磨损试验，以及磨损表面的ＳＥＭ形貌观察，分析了试验钢的磨损行为。同时研究了显微组织，硬度，韧性对耐磨性的影响，结果表明ＬＤ１的耐磨性优于６５Ｎｂ和Ｃｒ１２ＭｏＶ。     

10Cr9Mo1VNbN耐热钢强化机理研究

通过对１０Ｃｒ９Ｍｏ１ＶＮｂＮ耐热钢蠕变前后显微组织的观察,发现１０Ｃｒ９Ｍｏ１ＶＮｂＮ钢的强化机理为析出强化、固溶强化、位错强化和碳化物稳定下的亚结构强化,其中Ｎｂ、Ｎ（Ｃ,Ｎ）的析出强化对１０Ｃｒ９Ｍｏ１ＶＮｂＮ钢的持久强度起了重要作用。     

我国热作模具钢性能数据集（续Ⅳ）

(4 )　 3Ｃｒ2ＭｏＷＶＮｉ钢3Ｃｒ2ＭｏＷＶＮｉ钢降低碳的含量 ,增加了钨和钒的含量 ,设想在提高钢的韧性同时 ,又能提高钢的热稳定性和耐磨性 ,也有助于减弱第二类回火脆性的敏感性。实测 3Ｃｒ2ＭｏＷＶＮｉ钢 60 0℃以上的高温性能除伸长率较低、80 0 90 0℃的变形抗力比 5ＣｒＮｉＭｏ钢高 ,热稳定性与 5ＣｒＭｎＭｏＳｉＶ钢相当外 ,其它高温性能 (强度、硬度、冲击韧性、抗氧化性、抗热疲劳性、耐热磨损性 )均优于 5ＣｒＮｉＭｏ钢、4 5Ｃｒ2ＮｉＭｏＶＳｉ钢和5ＣｒＭｎＭｏＳｉＶ钢。该钢有二次硬化效应和较高的热稳定性 ,因此使…     

我国热作模具钢性能数据集(续ⅩⅢ)

(1 4 )　 5Ｃｒ4Ｍｏ3ＳｉＭｎＶＡｌ钢 ( 0 1 2Ａｌ)5Ｃｒ4Ｍｏ3ＳｉＭｎＶＡｌ钢系属基体钢 ,是一种空冷硬化型的热作和冷作模具兼容的钢种 ,已列入ＧＢ12 99标准。该钢也是在 4Ｃｒ3Ｍｏ3Ｖ钢的基础上重新调整合金元素 ,添加Ｓｉ、Ｍｎ、Ａｌ等元素进一步合金化。与 3Ｃｒ2Ｗ 8Ｖ钢相比不含钨 ,但钼、铬、锰、钒、硅及铝的含量明显提高。 5Ｃｒ4Ｍｏ3ＳｉＭｎＶＡｌ钢6 0 0～ 10 0 0℃的抗氧化性、80 0℃和 910℃的热磨损性能、保持 35ＨＲＣ的热稳定性以及 75 0℃的高温硬度均优于 3Ｃｒ2Ｗ 8Ｖ钢。同样 ,其室温拉伸强度、6 0 0～ 10 0 …     

我国热作模具钢性能数据集（续Ⅵ）

(6)　 5ＣｒＭｎＭｏ钢和 4Ｃｒ3Ｍｏ3Ｖ钢 (Ｘ32ＣｒＭｏＶ33)5ＣｒＭｎＭｏ钢是纳入我国ＧＢ12 99标准 ,沿用已久成熟的高韧性热作模具钢。其碳、铬、钼和硅的含量与5ＣｒＮｉＭｏ钢相当 ,为了节约镍而用锰代替。在使用中发现 5ＣｒＭｎＭｏ钢的淬透性和力学性能均接近5ＣｒＮｉＭｏ钢 ,在高温下工作时其耐热疲劳性略优于 5ＣｒＮｉＭｏ钢。因此适用制作边长小于 4 0 0ｍｍ (一般在2 5 0ｍｍ35 0ｍｍ)的锤锻模。由于热强性和耐磨性较差 ,而且回火稳定性不高 ,其性能不能满足大截面锻模的需要。另外其使用温度也不宜超过 5 0 0℃。所以除了…     

非调质钢汽车弯、直臂的开发研究

介绍了非调质钢（30MnVS）和（35MnVN）变、直臂与调质钢（40Cr）弯、直臂的材料力学性能和疲劳试验,并依据3种材料的对比试验结果,选定30MnVS钢或35MnVN钢为汽车弯、直臂用材,并与用40Cr钢制造弯、直臂进行了综合性比较分析。     

不同热处理条件下45#钢与40Cr钢摩擦学性能比较

针对机械行业中45^#钢和40Cr钢使用混乱的状况,着眼于2种钢材的基础性能,从45^#钢和40Cr钢的耐磨性能入手,对二者在不同热处理条件下的摩擦学性能进行了研究和比较。结果表明：在调质处理状态下,45^#钢和40Cr钢与GCr15钢对磨时的摩擦因数基本相同,但45^#钢的磨损量要低于40Cr钢,在强度符合条件,工件形状不太复杂的情况下,建议采用45^#钢;在淬火加低温回火处理状态下,45^#钢的摩擦因数与磨损量均高于40Cr钢的摩擦因数。在强调工件的强度和耐磨性时,建议采用40Cr钢;在高频淬火加低温回火处理和在离子氮化处理状态下,45^#钢的摩擦因数与磨损量均接近于40Cr钢的摩擦因数与磨损量,在保证强度的情况下,可以考虑采用45^#钢以降低生产成本。     

电火花放电熔涂层在边界润滑条件下的磨损特性

用环块磨损试验机对铬电极电火花熔涂层及淬火低温回火态45^#钢的边界润滑滑动磨损特性进行了研究。结果表明,轻载低速条件下,熔涂层与45^#钢的边界润滑滑动磨损机制以犁沟划伤为主,熔涂层的磨损量与45^#钢的相当;重载高速条件下,熔涂层的磨损机理以粘着磨损和磨料磨损为主,而45^#钢的磨损机理以点蚀剥落为主：熔涂层的磨损量远比45^#钢的人。     

40Cr的冲蚀磨损性能研究

在自制的转盘式冲蚀磨损试验台上以45^#钢为对比材料,对40Cr的冲蚀磨损性能进行了试验研究,结果显示40Cr的冲蚀磨损规律与45^#钢基本相似,而耐冲蚀磨损性能比45^#钢稍强。在电子显微镜（SEM）下对40Cr和45^#钢冲蚀磨损表面形貌进行观察,分析表明：40Cr和45^#钢的冲蚀磨损机制都是硬质砂粒对材料表面的微切削作用。     

Friction and Wear Behavior of Steels under Different Reciprocating Sliding Conditions

The friction and wear behavior of ISO 100Cr6 steel ball sliding against conventionally hardened carbon and low-alloy steels was studied. The effect of hardness, hardening capacity, normal load, and sliding speed on the coefficient of friction and friction energy was investigated. Friction tests were carried out, without lubrication and under ambient conditions, on a reciprocating friction tester in which a ball-on-flat contact configuration was adopted. The results showed that there is a relative tendency for the friction properties to decrease with increased hardening capacity and decreased hardness. The results showed that increasing normal load decreases the coefficient of friction for the two steel nuances. However, increasing sliding speed increases the coefficient of friction of low-alloy steel and decreases the coefficient of friction of carbon steel. The oxidation of wear debris influences the wear mechanisms and friction behavior.     

横向进给磨削表面硬化层的研究

在平面磨床上采用横向进给磨削方式对40Cr钢进行表面硬化处理,研究了磨削表面硬化层组织与磨损性能的变化趋势.结果表明:在磨削温度场作用下,横向进给磨削表面硬化层在深度和宽度方向上具有不同的组织变化趋势和显微硬度分布特征;表面硬化层始终存在由过渡区与未淬硬区或高温回火区组成的软化带,但合理的软化带宽度有利于提高油润滑条件下表面硬化层的耐磨性.     

钢基钒铬铸渗层干滑动磨损特性研究

采用MM-200磨损试验机,研究了不同钒铁颗粒含量的钒铬铸渗层干滑动磨损特性。研究结果表明:在试验条件下,铸渗层的耐磨性能比ZG310-570相比大幅度提高。铸渗层中铬铁含量为35%、钒铁含量为40%的试样耐磨性能最好,在450 N载荷下是ZG310-570的16.5倍。铸渗层的干滑动磨损机制为磨粒磨损和剥层磨损,当载荷较低时,主要以磨粒磨损为主,而载荷较高时,剥层磨损现象有所增加。     

Sliding wear of quasicrystalline coatings

The mass loss during sliding wear of several quasicrystalline (QC) coatings has been measured. QC coatings of the Al–Cu–Fe, Al–Cu–Fe–Cr and Al–Pd–Mn systems have been investigated and compared with a hardened tool steel and a WC–6% Co hardmetal. The wear rates of the coatings are in general comparable to conventional metallic materials. There is some variation in sliding wear behaviour of different QC coatings. This revised version was published online in August 2006 with corrections to the Cover Date.     

Wear behavior of different surface treated cam spindles

In this study wear behavior of cam spindles made of five different surface treated nodular cast iron (GGG50) and induction hardened CK45 steels was investigated. In the experiments; PVD–TiN-coated, both borided and PVD–TiN-coated, only hardened, both hardened and PVD–TiN-coated and only borided spherical graphite cast iron and induction hardened CK45 were used. The wear behavior of two type of steel was observed using cam wear mechanism under unlubricated and six different surface treatments. AISI 4140 steel was used for abrasive plate. The boronizing process was realized in a salt bath consisting of borax, boric acid and ferro-silicon at 900 °C for 6 h and appropriate boronizing heat treatment was carried out under atmospheric pressure. Borides, e.g. FeB, and Fe₂B formed on ductile iron was verified by scanning electron microscope (SEM) and the distribution of alloying elements was detected by means of energy dispersive spectroscopy (EDS) from the surface to the interior. The weight loss amounts were determined as a function of sliding time and sliding velocity. In the result of the experiments; boriding and PVD–TiN coating were successfully applied to GGG50 spherical cast iron. These surface treatments increased the wear resistance of GGG50 material.     

Features of electromagnetic methods for testing the wear resistance of medium-carbon structural steel subjected to laser or bulk hardening and tempering

Features of applying attachable eddy-current transducers of two types (with a flat end surface and a protruding ferrite rod core with localities 5–6 and 3–4 mm in diameter, respectively) for testing the structural state, hardness, and abrasive wear resistance of structural steel 45X (0.45 mass % C and 0.85% Cr), which was hardened under the action of continuous laser radiation, have been studied. The feasibilities of the eddy-current and coercimetric techniques for evaluating the wear resistance of a medium-carbon steel subjected to laser or bulk hardening and tempering in the temperature range 75–600°C have been studied.