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of heat-treatment parameter on carbon content of composite powders were also discussed. The results of SEM and XRD revealed that the carbon decomposing from glucose was more active than carbon black... and the compounded carbon increased with the increase of the flow rate of H2 in the range of 1.1-1.9 m3/h. Key words: WC-6%Co composite powder; carbon source; heat-treatment parameter; carbon content; microstructure......
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新型低成本超高强低合金耐磨钢研究及其工业化应用王昭东1,邓想涛1,曹艺1,王国栋1,顾林豪2,宋增强3(1.辽宁省沈阳市东北大学轧制技术及连轧自动化国家重点实验室2.首钢技术研究院,北京 1000413.秦皇岛首秦金属材料有限公司,河北秦皇岛 066003)摘 要:在普通C-Mn钢Q345成分的基础上,添加适量的Cr,B元素,通过控制轧制+离线热处理方法,生产出布氏硬度达400且具有良好强韧配合的新型超高强低合金耐磨钢,分析了在不同的热处理条件下其组织和性能的演变规律.结果表明,试验钢在淬火态,200~300℃......
and properties of Mg-5Al-1.5Ca-0.4Zn based alloy by semi-solid isothermal heat-treatment-die-pressure-casting process YANG Guang-yu, HAO Qi-tang, JIE WAN-qi, WANG Wu-xiao, JIA Wen-ping (College... isothermal heat-treatment-die-pressure-casting process were studied. It is found that there are three main phases formed in the experimental alloy, i.e., α(Mg), (α(Mg)+Al2Ca) eutectic and Mg17Al12. When......
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;Average grain size and shape factor at different time during isothermal heat-treatment 大功率感应加热制备的半固态组织演变相对于小功率感应加热的半固态组织要稍作提前.在560 ℃时,晶内的点状液池已经开始汇集形成条状液池；升温至570 ℃时,晶内的条状液池数量增多；580 ℃时,条状液相的宽度和长度都有所增加；当升温至590 ℃时,条状液池相互交叉,部分与晶界相连. 图7 不同条件下感应加热后合金的显微组织 Fig. 7 Microstructures of alloys induction heat-treatment under different conditions 感应加热半固态晶粒尺寸与温度关系如图8(a)所示.随着温度的增加,晶粒尺寸长大.使用大功率感应加热得到的晶粒尺寸要比小......
Trans. Nonferrous Met. Soc. China 22(2012) 2226-2232 Finite element analysis of pressure on 2024 aluminum alloy created during restricting expansion-deformation heat-treatment ZHAO Na, YANG Yan-qing.... Based on the idea, a pressure heat-treatment experiment was done to produce certain pressure on an as-extruded 2024 aluminum alloy which was wrapped in 42CrMo mould (2024/mould) [8]. It is shown......
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