ZGMn13钢铲斗齿强韧化处理

ＺＧＭｎ１３钢铲斗齿强韧化处理南昌湾里工具厂（３３０００４）王荣滨粤矿机厂海燕按标准成分和常规水韧处理工艺（图１）生产的ＺＧＭｎ１３钢铲斗齿，早期磨损和断齿为其主要失效形式。为此，我们在标准ＺＧＭｎ１３钢基础上加入０．５％～０．６％Ｍ。和改进水韧处理...     

烧结冷矿振动筛板的研究与生产

冷筛板是烧结冷矿振动筛的主要部件。介绍了用ＺＣ５５ＭｎＭｏＶＴｉ生产冷筛板的研究、生产和应用情况。它与原冷筛板（ＺＧ３Ｃｒ１８Ｍｎ１２Ｓｉ２Ｎ）比较，结果表明，耐靡性提高６３．２％，寿命提高３５％以上。     

ZG50MnSi可焊性工艺研究及应用

从理论上对ＺＧ５０ＭｎＳｉ的可焊性进行了分析，选定了预热温度，焊接材料及保护气体，应用四种不同的焊接方法，对ＺＧ５０ＭｎＳｉ的焊接接头进行了系统的研究，得出了正火状态下，选用ＨＳ－７０Ｃ，φ１．６焊丝富氩气体保护，预热加后热的焊接工艺方案，保证了ＺＧ５０ＭｎＳｉ焊接接头的质量，在生产中广泛应用，收到了良好的效果。     

ZGMn18钢铸件的研制

我集团公司以往生产的高锰钢铸件——轧臼壁、衬套（圆锥破碎机用零备件）通常采用ＺＧＭｎ１３钢制造。本文所述轧臼壁、衬套（以下简称铸件）是为外商承制的ＺＧＭｎ１８钢新材料铸件,其锰含量比ＺＧＭｎ１３钢高,磷含量又较之为少。我们从未生产过ＺＧＭｎ１８钢,而...     

稀土镁对铸态高锰钢机械性能的影响

实验了稀土镁对铸态高锰钢机械性能的影响．结果表明，在一定的Ｃ、Ｍｎ、Ｓｉ成分中，加入ＲＥＭｇ合金均使其铸态机械性能有所提高．同时在工业设备上试验证实，加入ＲＥＭｇ的某种成分之高锰钢，在铸态时其耐磨性能、机械性能均已达ＺＧＭｎ１３－１和ＺＧＭｎ１３－２（ＧＢ５６８０－８５）水平并超过了铸态使用的７５Ｍｎ１３     

防止斗轮机斗齿与斗刃焊接冷裂纹的工艺措施

我厂生产的斗轮堆取料机中 ,材质为ＺＧＭｎ13的斗齿与材质为 16Ｍｎ的斗刃焊缝处经常出现裂纹 ,甚至斗齿掉落 ,严重影响产品质量和工厂信誉。为了保证产品质量 ,在进行了焊接性分析之后 ,采取不同的工艺方法进行焊接试验 ,最后得出合理的焊接工艺 ,并应用于生产。1　焊接试验针对产生焊接冷裂纹的原因分析 ,选择了三种不同方案进行焊接试验 ,其试验结果见表 1。表 1　焊接试验方案及结果方案方案 1方案 2方案 3母材材质ＺＧＭｎ13ＺＧＭｎ13ＺＧＭｎ13+ 16Ｍｎ + 16Ｍｎ + 16Ｍｎ焊接方法焊条电弧焊 ＣＯ2 气体保护焊 焊条电弧焊焊接设备交…     

ZG35CrMn2SiMoB用于破碎机锤头的生产试验

ＺＧ３５ＣｒＭｎ２ＳｉＭｏＢ用于破碎机锤头的生产试验承德石油高等专科学校（０６７０００）丁德全，柴增田，李卫权破碎机锤头是工作于恶劣工况下的易损件，要求具有耐磨材耐冲击性能。我们就ＺＧ３５ＣｒＭｎ２ＳｉＭｏＢ在锤头上的应用进行了生产试验，取得了良好效...     

氧气压缩机气缸头简易金属型漏头底注工艺

氧气压缩机气缸头简易金属型漏头底注工艺邯郸制氧机厂吴仲初，卢振江１概述我厂５０ｍ３／ｎ空分设备配套用Ｚ—１．６７／１５０型氧气压缩机，其一二三级气缸头材质均为ＺＣｕＺｎ３５Ａ１２Ｍｎ２Ｆｅｌ，此类铸件均为该机关键零件，其外型复杂、壁厚相差悬殊、均要求...     

锌铝合金在煤气中的腐蚀试验──推荐在城市民用煤气管间配件中使用锌铝合金

本文通过试验，测定了锌铝合金和铜合金在煤气厂的混合煤气及出厂城市民用煤气中的腐蚀情况。结果表明，在城市民用煤气管道中．完全可以用ＺＡ２７合金取代ＺＣｕＺｎ３３Ｍｎ２Ｐｂ２制作阀门或零件。     

ZGMn13锤头的液态模锻模具

研制出ＺＧＭｎ１３锤头的液态模锻生产用模具，解决了锤头缩孔及热裂问题，得到高质量注锻锤取明显的经济效益。     

Improved corrosion resistance of cast carbon steel in sulphur oxides by alonizing

The results of studies on the Alonizing of cast carbon steel and of testing the corrosion resistance of this cast steel in an atmosphere containing 5 to 6% SO₂ + 50% SO₃ at 853 K are described and compared with the results obtained with unalonized cast carbon steel and high-alloy 23Cr-8Ni-2Mo cast steel. The duration of the corrosion tests was 336 hours. The aluminium diffusion layer on cast carbon steel was obtained by holding the specimens in a mixture containing 99% of powdered Fe-Al and 1% of NH₄Cl at 1323 ± 20 K. The holding time was 10 and 20 hours, respectively. The aluminium layer formed on the cast carbon steel was examined by optical microscopy and an X-ray microanalysis. After Alonizing for 10 h the layer had reached a thickness of 950 μm, and contained up to 35% Al. In a mixture of sulphur oxides corrosion rate of the alonized cast carbon steel was by about 600 times lower than that of the unalonized cast carbon steel, and by about 50 times lower than that of the 23Cr-8Ni-2Mo cast steel.     

Microstructure,Mechanical Properties,and Unlubricated Sliding Wear Behavior of Air-Cooled MnSiCrB Cast Steels

Two medium carbon low-alloy MnSiCrB cast steels containing different Si contents (0.5 and 1.5 wt.%) were designed, and the effects of Si contents on the microstructure, mechanical properties, and unlubricated sliding wear behavior of the cast steels after air-cooling from 850 °C and subsequent tempering at 220 °C was studied. The results show that the microstructure of the cast steel containing 0.5 wt.% Si consists of granular bainite and lower bainite/martensite multi-phase. In the cast steel containing 1.5 wt.% Si, granular bainite was not observed. The microstructure consists of carbide-free bainite/martensite multi-phase. Excellent hardenability can be obtained at both low and high Si levels. The cast steel containing 0.5 wt.% Si exhibits excellent combination of strength, ductility, and impact toughness superior to the cast steel containing 1.5 wt.% Si. Also, the wear-resistance of the former steel is better than that of the latter in the unlubricated sliding wear condition. The air-cooled MnSiCrB cast steel containing low Si levels, with excellent mechanical properties and wear-resistance, is a potential high-performance and low-cost wear-resistant cast steel for unlubricated sliding wear condition.     

高硅耐磨铸钢锤头的研究

高锰钢锤头硬度低,加工硬化效果差,白口铸铁锤头韧性低,易断裂和低合金铸钢锤头淬透性低等缺陷,以廉价的硅合金为主要合金元素,研制了高硅耐磨铸钢锤头介绍了高硅耐磨铸钢锤头的生产制造工艺,并对锤头生产过程中的钢液过滤处理工艺,淬火预处理工艺和改善淬透性的复合热处理工艺进行了深入研究.高硅耐磨铸钢锤头的使用性能明显优于传统锤头材料,使用高硅耐磨铸钢锤头可以明显提高破碎机作业率,降低物料破碎成本,具有较好的经济效益.     

COMPARISON OF STRESS CORROSION CRACKING BETWEEN CAST AND FORGED STEELS IN WATER

用同一炉钢的铸件和锻件对比研究了在水介质中的应力腐蚀性能。结果表明:铸钢和锻钢应力腐蚀裂纹扩展的激活能相同,均为Q=5540cal/mol,且和氢渗透测出的表观扩散激活能一致。无论是阳极极化还是阴极极化,均使铸钢和锻钢的da/dt升高,但阴极极化较为明显。氢渗透测量表明:不论阳极极化或阴极极化,随着电流增大,饱和氢渗透量明显增加,极化对da/dt和氢渗透通量的影响相似。 试验温度对K_(ISCC)的影响极小,但铸钢的K_(ISCC)明显地比锻钢高。氢渗透测试结果发现锻钢的饱和氢渗透通量约比铸钢大一倍。这与断口观察一致,由此可以解释K_(ISCC)的差异。尽管断口形貌明显依赖开裂时的K_I值,但在K_(ISCC)附近锻钢全是沿品断口,而铸钢则以准解理为主。     

超高碳球墨耐磨铸钢组织研究

研究了一类新型耐磨耐热材料—球墨铸钢。通过研究发明的新型球化剂,对超高碳钢钢液球化处理,铸态组织中除珠光体外,还含有一定数量的球状石墨和碳化物。重点分析了球墨铸钢铸态、退火、正火、锻造后的组织特征。研究表明:球墨铸钢经热处理后球化效果提高、基体组织细化,尤其正火、锻造后可获得大量的球状碳化物,与传统的高碳钢碳化物球化工艺有显著的差异。     

新型抗磨铸钢与A3钢的焊接

对新型抗磨铸钢的焊接性能进行了试验研究，在此基础上制定了该钢与A3钢的焊接工艺，并对该工艺下的接头力学性能进行了试验，为新型抗磨铸钢的推广应用提供了科学依据。     

Feasibility of electro-slag cast steel for hot-working tools

A study on electro-slag cast steel has been performed to assess the feasibility of its use in hot-working tools in place of traditional forged steels. In this study, some important material properties that are essential for the proper performance of hot-working tool steels have been measured. The properties of the electro-slag cast steel are compared with those of hot-working tool steels currently used in industrial practices. The use of electro-slag cast steel in specific applications has been evaluated and compared with the operational performance of currently used steels in industrial environments. The wear resistance, impact toughness, thermal fatigue resistance, and repair weldability of electro-slag cast steel have been determined. The material properties were found to be comparable to existing hot-working tool steels. The number of effective blows obtained from an industrial application test also confirms that electro-slag cast steel is a feasible material for hot-working tools.     

超高碳球墨铸钢热疲劳性能研究

研究了新型耐磨耐热材料——球墨铸钢。通过对钢液进行适当的球化处理，铸态组织直接获得一定数量的球状石墨、碳化物和珠光体，并有效地降低了有害杂质的含量。重点研究了球墨铸钢的热疲劳性能。研究表明：球墨铸钢的耐热性能优于传统铸钢与锻钢40Cr。     

高锰钢铸件锻造工艺的研究

为成功开发质优价廉的锻造高锰钢芯轨组合辙叉,针对高锰钢铸件锻造工艺进行了研究.通过对不同高锰钢铸件试样的加热、金相组织观察及不同锻造比下的结果分析,确定了高锰钢的锻造温度范围、锻造比数值、铸件锻后直接水韧处理前锻件在空气中停留时间对质量的影响以及正确停留时间,制定了高锰钢铸件的锻造工艺.研究结果表明,高锰钢铸锭可以进行锻造,组合辙叉芯轨可以采用锻造高锰钢材质,从而可实现开发锻造高锰钢芯轨组合辙叉的预期目的.通过锻造消除铸造过程中存在的内部缺陷,提高使用性能,延长组合辙叉的使用寿命.     

铸铁冷焊的氧化铁系低碳钢焊条的研制

针对采用低碳铜焊条在冷焊铸铁时极易出现白口屡、抗裂性差的问题,本文利用氧化铁皮和石墨,研制了铸铁冷焊用氧化铁系低碳钢焊条,在半熔化区和焊缝区降低了白口层和裂纹的发生.