共查询到19条相似文献,搜索用时 180 毫秒
1.
2.
3.
张群功 《中国铸造装备与技术》1991,(6)
为了满足铸件退火处理工艺的要求,退火炉应具备炉膛内温差小、加热均匀质量好、生产能力大、燃料消耗量低、热效率高、烟尘量少、劳动强度低及生产环境好等优点。长征汽车制造厂铸造分厂,因退火炉炉型结构落后,而不能保证铸件在退火处理工序上达到工艺要求。针对原炉存在的问题,该厂对其进行技术改造并重新设计与施工。新设计与改建的台车式节能均热退火炉,将原炉的煤粉直喷式加热改为火焰反射式,其 相似文献
4.
5.
6.
7.
退火炉烟气的余热利用,大多数采用燃料介质预热方式回收。上海冷拉型钢厂于85年9月25日鉴定的新型罩式退火炉却是利用烟气预热退火物料,达到了良好的节能效果。这一烟气余热利用的新颖技术在国内是首次获得成功。物料预热温度可达310℃,吨钢煤气实际单耗下降了7.35m~3,热效率达 相似文献
8.
9.
高效简易高温退火炉再次改造是在《高效简易高温退火炉》一文的基础上进行设计的 ,在简化结构的同时又取得了煤铁比达到 1∶(5 .15 ) ,退火周期进一步缩短和升温加快的效果。 相似文献
10.
1.4退火炉铝材退火炉用的能源有:电,柴油,天然气,煤气。炉型有批量的与连续式的。在板、带、箔材轧制中退火工序是必不可少的,线材的拉制也必须经过退火,高强度铝合金管、棒、型材的生产也需要退火。1998年中国约有860台退火炉,几乎全为电炉,其中现代化的空气循环批量退火炉约180台,80%集中在铝箔企业,仅厦顺铝箔有限公司就有12台(30t的l台、15t的11台)。自1985年以后,全世界就未建连续式气垫退火炉,因为投资大,同时现代化的强气流循环的大型批量退火炉在技术上完全能满足生产要求,而且单位产品的能耗也低一些。我国退火… 相似文献
11.
12.
Summary To obtain the highest toughness and the greatest magnetic softness, parts of technically pure iron should, after annealing, be slowly cooled in the furnace to 350–400°C (660–750°F), and then cooled rapidly in air from this temperature. 相似文献
13.
14.
15.
介绍了双相钢、耐热钢、超级奥氏体钢、超级铁素体钢等特殊不锈钢退火酸洗工艺的特点,与普通不锈钢相比,其退火速度较低,退火温度较高,冷却段为全水冷方式,氧化铁皮预处理采用破鳞机与抛丸机相结合的方式,酸洗段预酸洗采用电解中性盐的方法,混酸酸洗段的氢氟酸浓度较高。 相似文献
16.
17.
The formation of iron aluminide coating was attempted through annealing of plasma-sprayed iron/aluminum composite deposit.Shrouded plasma spraying with nitrogen as protective gas was employed to prepare iron/aluminum composite coating using mechanically blended iron and aluminum powders with Fe/Al atomic ratio of 65:35.Annealing of the as-sprayed coating was carried out in argon atmosphere at 450,500,550,and 600 o C for different durations.The microstructure of the coatings was characterized by scanning electron microscopy and X-ray diffraction.The effect of annealing on the microstructure and phase evolution in the coatings was examined.The results show that iron/aluminum composite coating with low oxide inclusions and porosity is deposited by shrouded plasma spraying.It is found that Fe2Al5 intermetallics forms as an intermediate phase in the composite coating during annealing.As the annealing duration and temperature increase,iron aluminide intermetallic phases in the coatings increase and the microstructure becomes more homogeneous.After annealing at 600 o C for 336 h,FeAl and Fe3Al intermetallic phases will present in the coating as the main phases. 相似文献
18.
R. A. Swalin A. H. Geisler 《JOM Journal of the Minerals, Metals and Materials Society》1956,8(10):1259-1263
The annealing textures of cold-drawn molybdenum, iron, and an iron base alloy containing 14 pet Al were investigated as a function of annealing temperature by using neutron diffraction techniques. Upon recrystallization, the [110] deformation texture was retained in all cases, and the texture became progressively sharper with increasing annealing temperature. At high temperatures, however, in the case of molybdenum, a new texture appeared. An anomalous diffraction effect was observed for iron; certain (110) plane orientations yielded more integrated intensity than others. Consideration of the problem showed a magnetostrictive effect to be improbable, and a hypothesis concerning the preferred distribution of grains deviating from the ideal [110] orientation is proposed. 相似文献
19.
合金焊丝退火工艺的改进 总被引:1,自引:0,他引:1
传统工艺退火处理后的合金低碳钢焊丝ER110S,在后续的拉拔加工中,加工硬化导致经常断丝;金相分析发现,退火后的原材料组织中存在大量不连续分布的贝氏体组织和弥散分布的碳化物.应用DSC分析重新确定该材料的相变温度点Ac_1、Ac_3,通过完全退火和再结晶退火工艺实验,得出700℃保温15h、随炉冷却到300℃出炉空冷的再结晶退火工艺.能够满足焊丝拉拔加工的力学性能要求. 相似文献