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采用高炉铁水悬浮铸造工艺生产钢锭模 总被引:1,自引:1,他引:0
采用在浇注时,以微型冷铁的形式向高炉铁水中加入锰铁悬浮剂的铸造工艺生产钢锭模,可以细化石墨形态,提高珠光体基体的弥散度,改善钢锭模的抗氧化性、抗热冲击性能,提高使用寿命。采用悬浮铸造工艺生产钢锭模时,浇注温度应高于普通铸造工艺20~40℃,浇注时间延长1/2~1倍,锰铁颗粒的加入时间应与浇注时间大致相同。 相似文献
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一、前言钢锭模在炼钢生产中消耗量很大,因此提高钢锭模的耐用性对降底炼钢成本、提高经济效益,有着重要意义。长期以来我厂一直沿用垂直分型的泥模半永久型,铸造灰铁钢锭模。这种工艺虽然省工省料,但钢锭模外观质量不良、表面粗糙、壁厚不均、机械性能低,使用寿命亦低,模耗高达28kg/吨钢。 相似文献
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《中国铸造装备与技术》2015,(4)
目前国内钢锭模主要由专业的铸造厂为特钢厂生产提供,或者大型的企业集团附属的铸造车间为自己的炼钢厂生产提供,均是成熟锭型,使用木模。考虑到部分项目锻造线的产品多样性,对于钢锭模的交货期、质量要求也较高。本次创造性的提出了用消失模实型工艺生产钢锭模,其目的在于通过实型消失模生产钢锭模,缩短钢锭模生产周期,降低钢锭模生产成本,适应钢锭锭型的多品种要求。 相似文献
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国内钢锭模的生产大多采用普通砂型铸造,其生产工序多,原材料消耗多、成本高。我厂经过几年生产实践试验,证明采用泥型铸造工艺生产钢锭模有下列优越性: 1,只要配备10副泥型模,使用40~50m~2的狭窄生产场地,就能保证一座1~2吨/小时的化铁炉连续生产钢锭模,生产效率高,周期短。 2.和普通砂型比较,减少一些专用砂箱和加工钢锭模底部的机床等辅助设备,投资 相似文献
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通过对HTl50铸铁钢锭模残留铸造应力的实际测定,发现金相组织均匀的钢锭模残留铸造应力呈“拉内压外”的有利状态,无需经热处理消除应力。据此推荐铸铁钢锭模的适宜化学成分。 相似文献
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针对以往大型钢锭模铸件内壁极易出现粘砂、夹砂、气孔、外表面板易有砂眼、缩孔及"胀肚"等缺陷,提出了大型钢锭模铸件铸造工艺的改进措施,使该铸件一级品达80%以上,废品率为零. 相似文献
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The present work investigated the solidification microstructure of AISI M2 high speed steel manufactured by different casting technologies,namely iron mould casting and continuous casting.The results revealed that the as-cast structure of the steel was composed of the iron matrix and the M2C eutectic carbide networks,which were greatly refined in the ingot made by continuous casting process,compared with that by the iron mould casting process.M2C eutectic carbides presented variation in their morphologies and growth characteristics in the ingots by both casting methods.In the ingot by iron mould casting,they have a plate-like morphology and grow anisotropically.However,in the ingot made by continuous casting,the carbides evolved into the fiber-like shape that exhibited little characteristics of anisotropic growth.It was noticed that the fiber-like M2C was much easier to decompose and spheroidize after heated,as a result,the carbides refined remarkably,compared with the case of plate-like carbides in the iron mould casting ingot. 相似文献
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The relationships between the surface quality of a single crystal copper ingot and the process parameters of heated mould continuous casting method were studied experimentally using our own design of horizontal heated mould continuous casting apparatus, and the mechanism by which process parameters affect the surface quality of a single crystal copper ingot is analyzed in the present paper. The results show that the process parameters affect the surface quality of a pure copper ingot by affecting the position of the liquid-solid interface in the mould. The position of the liquid-solid interface in the mould must be controlled carefully within an appropriate range, which is determined through a series of experiments,in order to gain a single crystal copper ingot with good surface quality. 相似文献
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采用在常规结晶器上布置线圈而开发的低频电磁半连续铸造技术(LFEC)制备2524铝合金扁铸锭并系统研究其对微观组织和宏观偏析的影响。结果表明,采用低频电磁半连续铸造技术制备的扁铸锭具有更加细小、均匀的铸态组织,而且组织由枝晶和蔷薇型转变为等轴晶组织。低频电磁半连续铸造技术对铸锭宏观偏析具有重要的影响,施加磁场后铸锭中心部分的反偏析明显减弱了。同时,对这些作用的机理进行了探讨。 相似文献
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