共查询到19条相似文献,搜索用时 78 毫秒
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喷射成形焊接高速钢与不锈钢 总被引:4,自引:0,他引:4
探索了M2高速钢与不锈钢(18-8)的喷射成形焊接工艺,用扫描电子显微镜(SEM)和SEM/EDX研究了焊接面的合金元素分布和组织结构特征。结果表明用喷射成形焊接高速钢和不锈钢有良好的工艺焊接性能。 相似文献
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高速钢复合轧辊的研究现状及进展 总被引:22,自引:3,他引:22
论述了高速钢复合轧辊的制造工艺和材质的研究进展及发展趋势,认为今后对高速钢复合轧辊的研究重点应放在高碳高钒(铌)系高速钢的成分设计、组织控制和优化复合轧辊界面结构上。 相似文献
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用喷射成形技术制造高铬钢—碳钢复合轧辊 总被引:3,自引:0,他引:3
我所采用喷射成形技术制造复合轧辊的研究工作取得了明显的进展,在制成Cu合金-碳钢复合轧辊之后,又成功地制取了高铬钢-碳钢复合轧辊,本文研究了该轧辊表面沉积层的显微组织并与传统方法制造材料的组织进行比较。 相似文献
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高速钢及半高速钢轧辊 总被引:5,自引:1,他引:5
评述了高速钢及半高速钢轧辊的发展过程、性能特点、显微组织、制造工艺及发展趋势。高速钢及半高速钢轧辊多制成铸造复合辊,已在带钢热轧机上得到广泛应用,目前已开始用于带钢冷轧机,具有较高的耐磨性和热稳定性,淬硬层深,使用寿命长,可减少换辊次数,提高轧机效率。 相似文献
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本文针对马钢CSP轧机的工作辊不均匀磨损严重影响出口板形质量的问题,对CSP轧机F3~F4不均匀磨损严重进行了分析,指出了使用高速钢轧辊的必要性。对高速钢轧辊的使用情况进行了大量的试验研究,并通过现场实际数据分析了高速钢轧辊情况下轧制力、轧辊温度、氧化膜情况,在大量现场试验的基础上制定了马钢CSP高速钢轧辊的使用工艺,并实现了工艺条件的长期稳定使用,通过现场实绩表明,使用高速港轧辊大大改善了机组的不均匀磨损,提高了机组的板形质量。 相似文献
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JIANGZhi-qiang FUHan-guang DINGYu-cheng 《钢铁研究学报(英文版)》2005,12(1):22-27
Therollslikenickelchromiuminfinitechilledcastiron ,bainiticductileiron ,highchromiumcastironandhardalloyrollhavebeeninvestigated[1- 4] .Theformerthreerollsarecost effectiveandhaveashorterservicelife .Forthelatterone ,ithasexcellentwearresistancebutmuchhig… 相似文献
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变质处理对复合轧辊用高速钢组织和性能的影响 总被引:10,自引:3,他引:10
研究了轧辊用高碳高钡高速钢的微观组织结构及添加不同变质剂处理后对其组织和性能的影响。结果表明;该高速钢的组织为马氏体,奥氏体及MC和M2C型碳化物,添加0.3%的稀土变质时,组织中碳化物分布状况的改善不明显,但可以促进加热过程中网状碳化物的断网和球团化;添加0.1%的镁变质时,组织中共晶碳化物明显减少,碳化物网得到细化;添加1.0%的钛或添加RE-Ti-Mg复合变质剂对碳化物的类型转变影响不大,但可以明显细仳晶粒和共晶碳化物网。添加RE-Ti-Mg复合变质剂处理后组织中的共晶碳化物网基本上得到消除。 相似文献
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Rolls made of high speed steel (HSS) have been prepared by centrifugal casting with electromagnetic stirring. During the centrifugal casting process of HSS rolls, segregation of alloy elements occurs due to the centrifugal force either to the outer or to the inner side of the rolls depending on the relative densities of alloyed elements and molten steel. The experimental results show that the electromagnetic stirring lessens the segregation of the alloyed elements in the centrifugally cast HSS roll. Moreover, the segregation of tungsten, molybdenum and vanadium is obviously diminished with increasing magnetic intensity but the segregation of vanadium increases again when the intensity of the electromagnetic field exceeds 0.053T. The reasons for these phenomena are analysed. 相似文献
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ZHAO Shunli ) FAN Junfei ) MA Chao ) ZHOU Candong ) ) Advanced Technology Division Research Institute Baoshan Iron & Steel Co. Ltd. Shanghai China ) School of Materials Science Engineering Shanghai Jiaotong University Shanghai China 《Baosteel Technical Research》2011,5(3):33-37
M42 high speed steel(HSS),a high grade alloy,was produced using the spray forming technology.Optical metallography(OM),X-ray diffraction(XRD) and scanning electron microscope(SEM) were used to investigate the microstructures of the as-sprayed M42 HSS and the as-atomized powders.It is found that as-sprayed M42 HSS is composed of martensite,retained austenite and carbides.The grain size,as well as the morphology,size and distribution of the carbides have been greatly improved compared with those of the as-cast M42 steel(a traditional process).The size of the powder obtained at a high cold speed was ranged from 50 μm to 100 μm in diameter.Its representative microstructures include dendrite,dendritic fragments,a mixture of dendrites,equiaxed grains and dendritic fragments,and equiaxed grains.The rapid solidification in the spray forming is a key factor to cause the refinement of the M42 HSS. 相似文献