用Cu—Sn—P合金铸铁生产摩托车缸套

根据摩托车缸套的服役条件和磨损机理,选择了含（质量分数,％）３２５～３３５Ｃ、１９～２１Ｓｉ、０８～１０Ｍｎ、０３～０５Ｃｕ、００８～０１０Ｓｎ、０２～０４Ｐ的ＣｕＳｎＰ合金铸铁生产缸套。生产中采用了有效的孕育处理工艺,批量生产出了含９８％以上珠光体、３％～５％二元磷共晶的ＣｕＳｎＰ铸铁缸套,该缸套耐磨损性良好（行驶２万公里,磨损量在００１～００１５ｍｍ之间     

奥—贝球铁合金磨球的研制和应用

选择高碳（３３～４０％Ｃ）,低硅（２２～２９％Ｓｉ）,尽量减少有害元素（Ｍｎ＜０５％、Ｐ＜００５％、Ｓ＜００３％）,钼、铜配合进行合金化（Ｍｏ＜０５％、Ｃｕ＜１０％）球铁,使用稀土镁硅铁合金球化处理后用金属型铸球;尔后采用等温淬火工艺（８６０～９２０℃×４０～９０ｍｉｎ,２８０～３２０℃×６０～９０ｍｉｎ）生产的奥贝合金球铁磨球破碎率低、耐磨性较好。     

高强韧铸造铝合金

本文探讨了Ｍｎ、Ｔｉ、Ｖ、Ｚｒ等合金元素对合金冲击韧性的影响规律,初步讨论了冲击韧性与强度、伸长率间的关系。以Ａｌ－Ｃｕ、ｍｎ合金为基,用Ｔｉ、Ｚｒ、Ｖ、Ｂ等微量合金化元素对其强化,并调整热处理制度,制成一种高强度、高韧性韧性的铸造铝合金。通过系统试验。确定该高强韧铸造铝合金的成分（质量分数,％）如下：４．６～～５．３Ｃｕ,０．３～０．５Ｍｎ,０．０５～０．２５Ｔｉ０．０５～０．２５Ｚｒ,０．、～     

我国拖拉机及农用汽车轮辋的现状及铸态球铁轮辋的生产

对比分析了我国农用汽车及拖拉机轮辋三种材料的性能,认为韧性铁素体球铁轮辋具有一定优势。铸态球铁轮辋的化学成分（％）为：３５～４０Ｃ、２６～３０Ｓｉ、Ｍｎ≤０３５、Ｐ≤００８、００３～００５Ｍｇ残、００２～００４ＲＥ残,经合理的球化、孕育处理,可达到球化１～４级、石墨球大小５～７级,基体中铁素体比例大于７５％,其力学性能：σｂ≥４５０ＭＰａ、δ≥１０％。     

B95_（oч）合金的二次淬火

Ｂ９５_（ｏч）合金的二次淬火Ｂ９５与Ｂ９５合金都是含锰与铬的Ａｌ－Ｚｎ－Ｍｇ－Ｃｕ系高强度铝合金，它们的合金元素含量（％）相同：５．０～７．０Ｚｎ，１．８～２．８Ｍｇ，１．４～２．０Ｃｕ，０．１～０．２５Ｃｒ，０．２～０．６Ｍｎ。不同之处是，后者的?..     

ZrMn0.9—xVxNi1.1（x=0.1—0.8）Laves相贮氢合金的电化学性能

研究了ＡＢ２型锆基Ｌａｖｅｓ相贮氢合金ＺｒＭｎ０．９－ｘＶｘＮｉ１．１（ｘ＝０．１～０．８）的晶体结构及其电化学性能。研究表明，ＺｒＭｎＶＮｉ合金为多相组织，当Ｍｎ含量较高时，合金的主相为Ｃ１５型Ｌａｖｅｓ相结构；随着Ｖ含量增加，合金中Ｃ１４型Ｌａｖｅｓ相的含量逐渐增加；合金的主相结构与电子浓度有关。Ｍｎ、Ｖ含量影响Ｌａｖｅｓ相合金中的不同类型四面体间隙数目及合金热力学和电化学性能。当合金中的Ｖ／（Ｍｎ＋Ｖ）比率在２／９～４／９范围内，合金表现出较好的综合电化学性能。ＺｒＭｎ０．５Ｖ０．４Ｎｉ１．１合金的最高容量为３４２ｍＡｈ／ｇ，高倍率放电能力为Ｃ２００／（Ｃ２００＋Ｃ５０）＝７５％，经１００次１００％ＤＯＤ充放电循环后，容量保持率为８５％左右。     

铬铝耐热合金的研制与应用

试验研制成了一种铬铝耐热合金（含０．７～１．０％Ｃ、４～５％Ｃｒ、５～７％Ａｌ、Ｓｉ≤０．５％、Ｍｎ≤１．０％、Ｐ、Ｓ均＜０．０５％）。该合金在１０５０℃高温下的氧化增重仅为０．３ｇ／ｍ２ｈ以下。用该合金生产的耐热铸件，使用寿命比中硅耐热球铁提高６～８倍，因其合金总加入量在１０％左右，因而生产成本较低，生产铸件可获明显经济效益     

铸态高韧性球铁高炉冷却壁的研制

介绍了牌呈ＱＴ４００－１铸态高韧性球钛冷却壁的化学成分控制及球化孕育处理工艺,研究硅含量对壁铸态力学性能的影响,试验结果表明,高炉冷却壁合适的化学成分为：３．０％～３．２％Ｃ;３．０％～３．４％Ｓｉ;≤３．５Ｍｎ;≤０．０５％Ｐ;≤０．０２％Ｓ。     

用含钛变质剂生产大断面高碳当量高强度铸铁

介绍了在高碳当量条件下,利用含钛变质剂生产大断面高强度灰铸铁的经验。提出在４ ．２ ％ ～４ ．０ ％ ＣＥ; ０ ．７～０ ．８Ｓｉ／Ｃ; ０ ．９ ％ ～１ ．２ ％ Ｍｎ ;０ ．０８ ％ ～０ ．１５ ％ Ｔｉ 的条件下,生产出大断面为８０ ｍ ｍ ×１２０ ｍ ｍ ～１００ ｍ ｍ ×２１０ ｍ ｍ 的铸件,σｂ 为２４４ ～３２８ ＭＰａ 。铸件断面组织致密,均匀一致,本体强度提高。     

ZL107A高强铸造铝合金成分的优化

在ＺＬ１０７的基础上，采用Ｍｇ、Ｚｎ、Ｃｄ、Ｔｉ、Ｂ、Ｂｅ等微量合金化元素对其强化，制成铸造高强铝合金ＺＬ１０７Ａ。通过系统试验，确定高强铸造铝合金ＺＬ１０７Ａ的成分（％）如下：６．５～７．５Ｓｉ，３．５～４．５Ｃｕ，０．１～０．２Ｍｇ，０．１～０．２Ｃｄ，０．１～０．２Ｔｉ，０．０１～０．０５Ｂ，０．０４～０．１Ｂｅ。该合金金属型浇注、经Ｔ５处理后的性能为：σｂ４２０～４７０ＭＰａ，σ０．２３２５～３９０ＭＰａ，δ５４％～６％，ＨＢＳ１４５。     

奥氏体在冲击磨料磨损过程中的作用SCIEI

本文在新型高强韧性奥氏体-贝氏铁素体高碳低合金钢冲击磨料磨损试验结果基础上,讨论了奥氏体在冲击磨损过程中的作用。发现只有在具有一定韧性的高强度基体组织中一定量高度分散分布的稳定性较高的奥氏体,才对抗冲击磨损有利,而组织中大量粗大的机械稳定性较低的奥氏体,尤其是作为连续基体存在时,对冲击磨损抗力极为有害。     

回火焊道对核电低合金钢表面镍基堆焊层热影响区性能的影响

采用钨极氩弧焊焊接方法在核电用16MND5低合金钢表面进行690镍基焊丝堆焊,分别堆焊1层和利用回火焊道方法堆焊3层,研究回火焊道对堆焊层热影响区的硬度、组织和冲击韧性的影响。结果表明:回火焊道产生的回火效应可有效降低合金钢镍基堆焊层热影响区的硬度至可接受硬度范围320HV10以下,堆焊层热影响区的冲击韧性提高27%以上,均值达到163J/cm2,热影响区板条状组织得到有效回复,获得满足RCC-M标准要求的低合金钢焊接热影响区硬度和冲击韧性指标。研究表明利用回火焊道技术可实现低合金钢镍基堆焊免除高温回火热处理。     

Untersuchung zur Schwingungsrißkorrosion an unlegierten und niedrig legierten Stählen

Investigation into corrosion fatigue of unalloyed and lowalloy steels Six commercial steels – three fine-grain normalized steels, one aged steel, one heat-resistant steel and one aged high-strength steel – were tested in rotary bending test machine equipped with a corrosion test cabinet. The test medium used was 0,05 m NaCl-solution. The results show that the cycling bending strength of all the steels tested is considerably reduced in this weak corrosion medium. The influence of corrosion on mechanical strength is the greater the higher the strength of the steel. The impact of other testing parameters is almost negligible. Cathodic polarization gives rise to increased corrosion fatigue strength of high strength steels and reduces corrosion fatigue sensitivity. In the case of lower strength steels complete cathodic protection can be achieved. The cyclic bending strength of the steels is reduced under condensing humidity conditions, too.     

热强碱介质中耐磨高锰钢冲击韧度的研究

采用浸泡腐蚀试验和腐蚀前后的冲击试验并借助于扫描电镜观察,研究了热强碱介质中高锰钢的腐蚀速率和冲击韧度.结果表明,高锰钢的平均腐蚀速率显著高于中碳铬合金钢,腐蚀过程中高锰钢有较严重的碱脆开裂现象.随着热强碱腐蚀时间的延长,高锰钢的冲击韧度明显降低,碱脆开裂是造成高锰钢冲击韧度下降的主要原因.在伴有冲击的热强碱腐蚀磨损工况,高锰钢有过早失效的危险.     

Influence of carbon content on microstructure and mechanical properties of Mn13Cr2 and Mn18Cr2 cast steels

In this paper, a comparison study was carried out to investigate the influence of carbon content on the microstructure, hardness, and impact toughness of water-quenched Mn13Cr2 and Mn18Cr2 cast steels. The study results indicate that both steels＇ water-quenched microstructures are composed of austenite and a small amount of carbide. The study also found that, when the carbon contents are the same, there is less carbide in Mn18Cr2 steel than in Mn13Cr2 steel. Therefore, the hardness of Mn18Cr2 steel is lower than that of Mn13Cr2 steel but the impact toughness of Mn18Cr2 steel is higher than that of Mn13Cr2 steel. With increasing the carbon content, the hardness increases and the impact toughness decreases in these two kinds of steels, and the impact toughness of Mn18Cr2 steel substantially exceeds that of Mn13Cr2 steel. Therefore, the water-quenched Mn18Cr2 steel with high carbon content could be applied to relatively high impact abrasive working conditions, while the as-cast Mn18Cr2 steel could be only used under working conditions of relatively low impact abrasive load due to lower impact toughness.     

Microstructure and properties of quenched-and-aged plates produced from a copper-bearing HSLA steel

For the first time in India, quenched-and-tempered (Q&T) plates of a copper-bearing high-strength lowalloy (HSLA) steel have been commercially developed for naval structural applications. A 50 ton production heat was made through electric arc furnace (EAF)-vacuum arc degassing (VAD) route and continuously cast into 170 mm thick slabs. These slabs were conditioned, reheated in walking-beam furnace and hot rolled in plate mill into plates of 10 to 16 mm thickness. The as-rolled plates were hardened through oil quenching and subsequently tempered (aged) at 630 ‡C to achieve the combination of highstrength and good low-temperature impact toughness. The microstructures of heat treated plates showed fine acicular ferrite with grain sizes ranging between ASTM No. 9 and 10. From the standpoint of tensile properties, Q&T plates of all thicknesses exhibited significantly higher yield strengths than the minimum stipulated value of 552 MPa for HY-80/HSLA-80 steels. The elongation (22.20 to 26.00%) and reduction in area (62.12 to 67.62%) values achieved also exceeded the respective minimum requirements of 20 and 50% stipulated for such steels. The trend in variation of Charpy V-notch (CVN) impact energies at room temperature, -18, and -62 ‡C not only showed significantly higher values than that stipulated for HY-80 and HSLA-100 steels at -18 ‡C, but also indicated that the CVN impact energies achieved (105.15 to 144.25 J) at -62 ‡C were higher than the estimated value of 90 J for HSLA-80/HSLA-100 steels at this temperature.     

Influence of carbon content on wear resistance and wear mechanism of Mn13Cr2 and Mn18Cr2 cast steels

By means of impact abrasion tests, micro-hardness tests, and worn surface morphology observation via SEM, a comparison research based upon different impact abrasive wear conditions was conducted in this research to study the influence of different carbon contents(1.25 wt.%, 1.35 wt.%, and 1.45 wt.%) on the wear resistance and wear mechanism of water-quenched Mn13Cr2 and Mn18Cr2 cast steels. The research results show that the wear resistance of the Mn18Cr2 cast steel is superior to that of the Mn13Cr2 cast steel under the condition of the same carbon content and different impact abrasive wear conditions because the Mn18Cr2 cast steel possesses higher worn work hardening capacity as well as a more desirable combination of high hardness and impact toughness than that of the Mn13Cr2 cast steel. When a 4.5 J impact abrasive load is applied, the wear mechanism of both steels is that plastic deformation fatigue spalling and micro-cutting coexist, and the former dominates. When the carbon content is increased, the worn work hardening effect becomes increasingly dramatic, while the wear resistance of both steels decreases, which implies that an increase in impact toughness is beneficial to improving the wear resistance under severe impact abrasive wear conditions. Under the condition of a 1.0 J impact abrasive load, the wear mechanism of both steels is that plastic deformation fatigue spalling and micro-cutting coexist, and the latter plays a leading role. The worn work hardening effect and wear resistance intensify when the carbon content is increased, which implies that a higher hardness can be conducive to better wear resistance under low impact abrasive condition.     

中锰奥氏体基耐磨钢中马氏体的应用

合理设计了中锰奥氏体基耐磨钢的成分,并选择合适的水韧处理工艺来获得一种介稳的单相奥氏体,在此组织基础上进行不同的等温热重申２工艺岖得一定量的马氏体,以提高基体的初始硬度,又不恶化其冲击韧度。再通过与高锰钢（Ｍｎ１３）在同等工况条件下进行耐磨性模拟对比试验,来选择适合中锰钢中、低冲击磨料磨损条件下使用的热处理工艺和组织,同时对试样进行金相组织观察及力学性能测试。     

变质超高锰钢的冲击磨料磨损行为研究

本文通过动载磨料磨损实验和硬度测量,利用ＳＥＭ和ＴＥＭ观察磨损表面形貌和微观组织,研究了超高锰钢的冲击磨料磨损行为,研究结果表明,在０．５和１．０Ｊ冲击功下,Ｍｎ１７（ＳＲ）和Ｍｎ２０（ＳＲ）的耐磨性高于Ｍｎ１２（ＳＲ）;在中,低磨损冲击功下,变南硬Ｍｎ１７的耐磨性有所提高,但在高冲击功下,变质反而使耐磨性有所降低,磨损表层的变形组织主要由高密度位错和变形带组成,加工硬化和变质处理的适当配合使高超     

Mn含量对Mg-5Al合金铸态组织和力学性能的影响

研究了合金元素Mn对Mg-5Al合金铸态组织和力学性能的影响。结果表明,在Mg-5Al合金中加入Mn后,合金组织细化,连续或半连续网状分布的β-Mg17Al12相逐渐转变为断续、分散的骨骼状相,晶界附近出现颗粒相并且数量逐渐增多。随着Mn含量增加,合金室温抗拉强度、伸长率及冲击韧度先上升然后下降。当Mn含量为0.3%时,合金综合力学性能最好,抗拉强度、伸长率与冲击韧度达到190MPa、7.3%与21.1J·cm-2,分别提高了7.9%、9.1%与9.3%。继续增加Mn含量至0.5%时,Al8Mn5颗粒聚集长大粗化,导致Mg-5Al合金综合力学性能下降。