S—148芳醇不饱和聚酯树脂耐腐蚀机理研究

合成了Ｓ－１４８芳醇不饱和聚酯树脂，研究了Ｓ－１４８树脂浇铸体和玻璃钢于不同温度下在不同介质中的耐酸、碱、盐腐蚀性能，并探讨了其耐腐蚀机理。结果表明，Ｓ－１４８树脂具有优异的耐腐蚀性能，可用作耐腐蚀制品的基体树脂。     

Fe－Mn－Si形状记忆合金中元素对材料耐蚀性的影响

研究了Ｆｅ－Ｍｎ－Ｓｉ形状记忆合金中元素对材料耐腐蚀性能及形状记忆性能的影响。结果表明：在Ｆｅ－Ｍｎ－Ｓｉ合金中，随着Ｍｎ、Ｓｉ含量的增加，其耐腐蚀性能略有提高，但Ｍｎ含量过高会导致合金形状记忆性能下降。而在Ｆｅ－Ｍｎ－Ｓｉ合金中加入适量的Ｃｒ，可明显提高该合金的耐腐蚀性能，并使之具有良好的形状记忆性能。     

Fe—Mn—Si形状记忆合金中元素对材料耐蚀性的影响

研究了Ｆｅ－Ｍｎ－Ｓｉ形状记忆合金中元素对材料耐腐蚀性能及形状记忆性能的影响。结果表明：在Ｆｅ－Ｍｎ－Ｓｉ合金中，随着Ｍｎ，Ｓｉ含量的增加，其耐腐蚀性能略有提高，但Ｍｎ含量过高会导致合金形状记忆性能下降。而在Ｆｅ－Ｍｎ－Ｓｉ合金中加入适量的Ｃｒ，可明显提高该合金的耐腐蚀性能，并使之具有良好的形状记忆性能。     

增韧聚苯硫醚的力学性能和破坏形态

研究了高性能热塑性树脂双酚Ａ聚砜（ＰＳＦ）、酚酞型聚醚酮（ＰＥＫ－Ｃ）增韧聚苯硫醚（ＰＰＳ）的破坏韧性、破坏形态以及抗溶剂性能。ＰＳＦ和ＰＥＫ－Ｃ能提高ＰＰＳ的冲击强度和破坏韧性。不同共混方法由于形成不同形态的分散相粒子对增韧效果和抗溶剂性能有不同的影响。增韧体系的抗溶剂性能随热塑性树脂加入及其含量增加而降低。     

短炭纤维增强聚芳醚酮复合材料的研究

采用短炭纤维（ＳＣＦ）增强聚芳醚（ＰＥＫ－Ｃ）树脂,研究了不同的预混方法、纤维的表面处理、纤维的含量、成型温度和成型压力对复合材料性能的影响。优化了ＳＣＦ／ＰＥＫ－Ｃ复合材料的成型工艺。     

锌－铬水系涂层的研究

采用超细片状金属锌粉和铬酸盐、有机还原剂等材料配制的水系涂层，该涂层具有很好的防蚀效果。经过扫描电镜（ＳＥＭ），电子探针（ＥＰＭＡ）、Ｘ－衍射、化学分析、差热分析以及电化学方法研究了Ｚｎ－Ｃｒ水系涂层的组成和结构，并探讨了其对耐腐蚀性能的影响。     

双马体系对T－50／酚醛环氧复合材料层间剪切强度的影响

本文研究了在酚醛环氧树脂基体中加入的不同双马来酰亚胺树脂及其添加量和固化工艺条件对Ｔ－５０／酚醛环氧复合材料层间剪切强度（ＩＬＳＳ）的影响。采用ＳＥＭ分析了复合材料剪切断口形貌。结果表明，改性双马来酰亚胺树脂的加入可以使复合材料的ＩＬＳＳ值提高１０％以上。     

新型双马来酰亚胺基体树脂及其玻璃布层压板的制备与性能

以糠醇、甲苯二异氰酸酯（ＴＤＩ－２０／８０）和二苯甲烷双马来酰亚胺（ＢＭＩ）为原料,采用由Ｄｉｅｌｓ－Ａｌｄｅｒ加成反应合成的含有氨酯键的新型双马来酞亚胺ＢＭＵ－Ｔ作为二苯甲烷双马来酰亚肢的增韧改性剂．通过ＢＭＵ－Ｔ与二苯甲烷双马来酰亚胺以不同比例简单混合得到增韧改性的新型双马来酰亚胺基体树脂;用丙酮和乙二醇单甲醚作为混合溶剂制备了贮存稳定性能优良的树脂溶液和玻璃布预浸料。压制得到的玻璃布层压板具有良好的力学性能和电气性能．１５５℃下的弯曲强度保留率可以达到９０％以上,而且对甲苯、饱和氯化钠水溶液及１０％的盐酸具有很好的耐腐蚀性能。     

酚醛环氧树脂的基质辅助激光解吸电离飞行时间质谱（MALDI—TOF…

用基质辅助激光解吸电离飞行时间质谱（ＭＡＬＤＩ－ＴＯＦ－ＭＳ）技术研究了Ｆ－４６和ＪＦ－４３型酚醛环氧树脂。获得了该类树脂的聚合度及其不同聚合度组分的分子结构；发现该类树脂中含有环氧氯丙烷的聚合物，给出了可能的分子结构。     

双马体系对T—50／酚醛环氧复合材料层间剪切强度的影响

本文研究了在酚醛环氧树脂基体中加入的不同双马为酰亚胺树脂及其添加剂量和固化工艺条件对Ｔ－５０／酚醛环氧复合材料层间剪切强度（ＩＬＳＳ）的影响。采用ＳＥＭ分析了复合材料剪切口形貌。结果表明，改性双马来酰亚胺树脂的加入可以使复合材料的ＩＬＳＳ值提高１０％以上。     

Functional properties of a spark plasma sintered ultrafine-grained 316L steel

A micrometric austenitic stainless steel 316L powder was densified by spark plasma sintering. The process parameters were varied over wide ranges and the impact of such variations on sintered materials was studied through the characterization of their microstructures, densities, hardness and corrosion resistance. For comparison with the properties of traditionally cast 316L, all these investigations were also systematically carried out on as cast samples. The sintered stainless steel produced this way was highly densified, with grains of a micrometric size and the forming process did not induce any residual strain gradients as shown by transmission electronic microscopy analysis. The investigation of the corresponding mechanical properties reveals an enhancement of hardness up to twice the value measured on one sample of as cast 316L. This result is in good agreement with the Hall–Petch formalism. Additionally, in the matter of corrosion behavior, fully dense samples display an enhanced passive state in chloride media compared to as cast material. Spark plasma sintering appears to be an interesting alternative elaboration way of ultrafine 316L stainless steel giving materials with high stress resistance, without strain gradients through the volume, and promising functional properties concerning corrosion behavior.     

S-07钢在高压充气阀芯中的替代应用研究

目的解决高压充气阀S-03钢渗氮阀芯生产过程中周期长、合格率低、渗氮层开裂和贮存过程中锈蚀及方向漏率超标等问题。方法结合S-03钢渗氮阀芯工艺流程,分析其生产及贮存过程中存在的问题,并提出由S-07钢替代S-03钢渗氮工艺,从防锈、硬度和强度3个方面进行两种材料特性理论分析,同时进行耐蚀性试验、功能性试验、力学环境试验和寿命试验考核。结果 S-03钢渗氮阀芯经历湿热试验20 d后,出现轻微锈蚀,盐雾试验96 h后,锈蚀严重,而同条件下的S-07钢阀芯无锈蚀。S-07钢阀芯经过了功能性试验,x,y,z这3个方向的力学环境试验,动作200次的寿命考核试验后,动作灵活,功能测试合格。结论充气阀阀芯完成了S-07钢替代工艺研究,成功解决了影响充气阀功能的阀芯锈蚀问题和渗氮层开裂问题,同时使生产效率提高了约70%,生产成本降低了约50%。     

新型低镍铸造不锈钢的组织及其磨蚀行为研究

设计了新型低镍铸造不锈钢的化学成分，研究了该钢的组织及其腐蚀与磨蚀行为。结果表明，具有双相组织的新型铸造不锈钢，在含有固相颗粒的高温碱介质中具有良好的耐腐蚀与耐磨蚀性能，此外，该钢还具有较好的力学性能和铸造性能，且成本较低。具有广阔的工业应用前景。     

Corrosion characteristics of a selective laser melted Co–Cr dental alloy under physiological conditions

This study explores the corrosion behavior of a dental cobalt–chromium (Co–Cr) alloy fabricated by selective laser melting (SLM) under conditions simulating the oral environment. Specimens were fabricated using either SLM or traditional casting methods. Microstructure and surface characteristics were evaluated using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy and X-ray diffraction. In addition, sample corrosion characteristics were assessed using electrochemical impedance spectroscopy. Large microstructural differences were observed between SLM and traditional cast samples, with SLM exhibiting a more compact and homogeneous microstructure. The SLM samples also exhibited a slightly thicker surface oxide layer in comparison to traditional cast samples. In artificial saliva at pH 5, no differences were observed in the electrochemical corrosion properties or XPS surface characteristics of SLM and traditional cast specimens. However, in artificial saliva at pH 2.5, significant differences in electrochemical corrosion properties were observed, with SLM specimens exhibiting more corrosion resistance in comparison to traditional cast samples. The enhanced corrosion resistance of SLM samples in an acidic environment provides further support for their use in dental applications, where the oral environment can become temporarily acidic after meals.     

铸造双相不锈钢点腐蚀行为研究

采用化学浸泡腐蚀试验及微观组织和化学成分分析研究了5种铸造双相不锈钢在6%Fe Cl3溶液中的点腐蚀行为,并与316L奥氏体不锈钢进行了对比。结果表明,铸造双相不锈钢的抗点腐蚀性能均优于316L的,腐蚀速率和点腐蚀深度均小于316L奥氏体不锈钢的;双相不锈钢主要耐点蚀能力合金元素在奥氏体和铁素体相内分布不均匀,铬、钼更多地分配于铁素体相内,而镍、氮则更多地分配于奥氏体相内,铁素体相的耐点蚀指数PRE(Cr%+3.3Mo%+16N%)大于奥氏体相;双相不锈钢的耐点腐蚀性能与化学成分有关,随着PRE的增加,双相不锈钢的耐点腐蚀性能提高,铜元素在铁素体内析出的富铜相导致点蚀优先在铁素体内发生和发展。     

Influence of carbon diffusion on microstructure and wear behaviour of duplex stainless steel surface layers on lamellar grey cast iron

Surface welding with duplex stainless steel was performed to enhance the wear and corrosion properties of grey cast iron, which is used as material for applications as pump components in maritime and chemical environments. The method used for surface welding and the corresponding process parameters determine the chemical composition and microstructure, which both determine the corrosion and wear properties of the surface layer. High heat input leads to high chemical dilution and thus, reduced corrosion resistance. Slow cooling rates, which are recommended for welding of grey cast iron components, facilitate the formation of carbides in the fusion zone of the chromium‐rich duplex stainless steel surface layer. On the one hand, carbides lead to increased hardness and thus, improved wear resistance of the surface layers. On the other hand, carbides and high chemical dilution rates reduce the corrosion resistance and therefore should be avoided. Under high cooling rates, the risk of cracking in the heat affected zone of the grey cast iron increases due to martensitic phase transformations. The paper describes the correlation of process parameters, microstructure and chemical composition with a focus on carbon diffusion and carbide formation, ever considering the effect on the wear behaviour in an oscillation tribometer and under erosion‐corrosion conditions.     

触变–塑变复合成形铸铁材料的耐磨损和抗腐蚀性能研究

目的 针对天然气压缩机用铸铁构件服役环境恶劣的情况,研究一种提升其耐磨损和抗腐蚀性能的成形工艺。方法 以天然气压缩机用FCD400铸铁材料为研究对象,通过熔融–冷却试验和热压缩试验获得FCD400铸铁材料在高温条件下的固–液相变规律、半固态触变成形性能、塑性成形性能。基于该铸铁材料性能建立合适的触变–塑变复合成形工艺方案。通过二段热压缩试验开展FCD400铸铁材料的触变–塑变复合成形的物理模拟,验证触变–塑变复合成形的可行性。随后,通过摩擦磨损试验和中性盐雾腐蚀试验,对比触变–塑变复合成形铸铁材料和原始铸态材料的耐磨损和抗腐蚀性能,验证触变–塑变复合成形的有效性。结果 触变成形阶段变形量为12 mm且塑性成形阶段变形量为20 mm的触变–塑变复合成形FCD400铸铁材料具有更加精细的珠光体片层,以及更高的硬度和更好的耐磨性能。触变成形阶段变形量为20 mm且塑性成形阶段变形量为12 mm的触变–塑变复合成形FCD400铸铁材料具有更加离散且细小的球状石墨,离散分布的细小球状石墨对基体的撕裂作用更小并能够减缓腐蚀速率。结论 通过调节触变–塑变复合成形工艺参数,能够实现对FCD400铸铁材料的耐磨损和抗腐蚀性能的主动调控。     

铸造钛合金在NH_4Cl介质中的腐蚀行为

采用不同的试验方法，研究了铸造钛合金ＺＴｉＡｌ６Ｖ４（ＧＢ８０６３－９４）的腐蚀与磨蚀行为。结果表明，该合金具有优良的均匀腐蚀、点蚀、晶间腐蚀与磨蚀性能，是制造在ＮＨ４Ｃｌ介质中工作的高速旋转件的理想材料。     

Soviet superalloy ZHS6-K,effect of B/C modification

A Soviet nickel base cast superalloy, ZHS6-K, has been examined for its response to B/C modification. Three alloy chemistry variants, with 0.17C/0.02B, 0.06C/0.1 B and 0.03C/0.2B (wt%) have been investment cast and investigated for microstructure, heat-treatment, tensile properties, stress-rupture properties and hot corrosion resistance. The B/C modification of the alloy results in some improvement in the yield strength. However, the tensile ductility and the stress-rupture properties are considerably degraded. The nature of the hot corrosion is of a pitting type for the ZHS6-K, whereas it is of a broad front type for the high boron alloys.     

High Temperature Corrosion of Fe-C-S Cast Irons in Oxidizing and Sulfidizing Atmospheres

The corrosion behavior of spheroidal graphite and flake graphite cast irons was studied in oxidizing and sulfidizing atmospheres between 600 and 800℃ for 50 h. The corrosion rate in the sulfidizing atmosphere was faster than that in air above 700℃, due to the formation of the Fe0.975S sulfide. The corrosion rate of the spheroidal graphite cast iron was similar to that of the flake graphite cast iron.