共查询到19条相似文献,搜索用时 328 毫秒
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本文主要介绍了GCr15钢冷轧辊热处理工艺方案的选择.在单件、小批量的生产条件下,采用温水整体淬火和铁皮——石棉(布)复合套进行局部表面保护冷却淬火的工艺方法,冷轧辊的热处理质量具有可靠的保证。 相似文献
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分析了冷轧辊双中频淬火工艺的特点,介绍了双中频淬火工艺的试验研究工作;检测结果表明,该淬火法使冷轧辊的硬度均匀性和淬硬层深度有了显著提高。 相似文献
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沈阳重机厂在一机部机电所的指导与协助下,于1978年在工频感应加热淬火的基础上,采用工频双感应器对冷轧工作辊进行加热淬火,使它的质量有了提高。试验工作时感应器功率的匹配、加热特性、温度场的分布、奥氏体化时间等作了一些摸索,与传统工频感应加热淬火作了质量指标比较,得出了用两种工艺方法淬火后的淬硬层深度、硬度的均匀性、硬度沿截面变化、以及表面硬度等方面的数据。从结果上看,新的工艺方法在质量指标上都有不同程度的提高,因此在不具备双频淬火生产冷轧工作辊的条件下,这种工艺方法对提高冷轧工作辊的质量还是有一定意义的。 相似文献
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9Cr2钢冷轧辊新的断续淬火工艺 总被引:2,自引:0,他引:2
9Cr2钢冷轧辊经传统的双液淬火后,使用中出现了大量的深层剥落,后改用新的断续淬火工艺,消除了兴层剥落现象,使冷轧辊使用寿命提高。 相似文献
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针对带钢冷轧连退、热镀锌、平整机支承辊及有色金属冷轧机大直径支承辊采用传统热处理工艺,淬火层深度达不到技术要求的问题,对大型锻钢支承辊采用工频连续感应加热+喷水冷却淬火新工艺,热处理后,辊身硬度达69~76HSD;淬火层深度≥50 mm,比原工艺提高了40%,机械性能满足设计要求。 相似文献
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冷轧工作辊须满足表面硬、心部韧的性能要求,需通过热处理工艺调控金相组织实现,针对8Cr5MoV合金钢冷轧辊,通过热模拟试验获得材料的高温本构关系,结合DEFORM-3D软件对淬火工序进行模拟,探索冷轧工作辊的最优热处理工艺。研究结果表明:工作辊最优热处理工艺为初始温度500℃保温1 h,加热至930℃保温15 min,最后进行5 min的喷雾淬火处理。工作辊淬火处理后表层马氏体组织含量为99%,淬硬层深度在25 mm左右,工作辊心部区域保留了韧性较好的珠光体组织,该研究为实际生产提供了可靠的技术支持。 相似文献
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深淬硬层冷轧辊用钢的端淬曲线 总被引:1,自引:0,他引:1
测定了不同冷轧辊用钢的端淬曲线、奥氏体晶粒度和接触疲劳寿命,结果表明:新型冷轧辊用钢的淬透深度达35-40mm,且具有低的过热敏感性和高的接触疲劳寿命。 相似文献
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DSC measurements were carried out for various Fe100−xAlx(x = 5–30 at%) alloys to clear the effects of cold roll and quenching rate from 1173 K. In the case of cold roll free specimens, an exothermic peak was observed at around 530–560 K in quenched specimens and no peaks in slowly cooled specimens. The peak temperature and its exothermic heat depended on the alloy composition. The maximum exothermic heat was obtained for a 25 at% Al alloy and its value were about 1200 J/mol. The peak in a 5 at% Al alloy was remained as a future work. The exothermic heat was affected by the quenching temperature in alloys above 15 at% Al. The peak temperature was decreased by decreasing the quenching temperature. In a 15 at% Al alloy, the peak became negligibly small by quenching from 1023 K. The activation energies in cold roll free specimens were evaluated from the Kissinger analysis and they were 134, 108, 133 and 110 kJ/mol for 15 at% Al, 20 at% Al, 25 at% Al and 30 at% Al alloys, respectively. On the other hand, cold rolled specimens showed an exothermic peak at around 470 K, independently of the cooling rate. Their exothermic heats and temperatures were comparable order to those of furnace cooled and water quenched specimens. The present results suggested that origin of exothermic peaks of all alloys were same in nature and atomic ordering may be related to the exothermic behavior at relatively low temperatures. 相似文献
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研究了半高速钢成品冷轧辊的表面淬火工艺参数。并经解剖分析证明,采用该工艺的半高速钢成品辊的淬硬层深度达到45 mm,硬度达到85HSD以上,完全满足技术要求。 相似文献
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