锚杆支护技术及工艺新探索

鹤岗矿业集团公司新陆煤矿不断寻求锚喷支护技术及工艺的新突破,经过多年的探索建立起岩巷施工“光面爆破成形-高强锚杆支护-小喷厚成巷”的快速作业体系,使施工安全和工程质量得到保证,具有很高的安全效益和经济效益,其经验值得借鉴和推广。     

Characterization on Laser Melting Deposition of Metallic Components

Laser melting deposition process (LMD) is an advanced computer-aided laser additive manufacturing process (LAM). This process can produce net-shape components with fully dense microstructure and good properties based on a computer aided design (CAD) model by using a high power laser to melt the injected powders and re-solidify them in a layered way. It presents obvious superiority in direct manufacturing components with small-lot, repairing high-value components with good performance, and integrated fabrica...     

各组分对三罐装聚氨酯亚光木器漆光泽度的影响

三罐装聚氨酯亚光木器漆的光泽度是其三个组分A组分(主剂)、B组分(固化剂)、C组分(稀释剂)共同作用的结果。本文分别研究了A组分中消光粉用量、树脂用量,B组分的固化速度和C组分溶剂的极性和挥发速度对亚光漆光泽度的影响。结果表明:A组分中消光粉/树脂用量的增大有利于光泽度的降低;B组分固化速度的加快有利于光泽度的降低;C组分中溶剂极性减弱和挥发速度的增大有利于光泽度的降低。     

Effect of substituting Mm with La on the electrochemical performances of Co-free LaxMm1−x(NiMnSiAlFe)4.9 (x = 0–1) electrode alloys prepared by casting and rapid quenching

In order to enhance the electrochemical capacity of the Co-free AB₅-type electrode alloy, Mm in the alloys was substituted with La and Co-free La_xMm_1−x(NiMnSiAlFe)_4.9 (x = 0, 0.45, 0.75, 1.0) hydrogen storage alloys were prepared by casting and rapid quenching. The effects of the substituting Mm with La on the electrochemical performances of the as-cast and quenched alloys were investigated in detail. The obtained results show that substituting Mm with La can enhance markedly the capacities of the as-cast and quenched alloys. When the amount of substituting Mm with La, x increased from 0 to 1.0, the maximum capacity of the as-cast alloys at 0.2C rate increased from 273.45 to 304.47 mAh g⁻¹, and the capacity retaining rate (R_h) increased from 59.16 to 59.86%. The capacity of the as-quenched alloys with a quenching rate of 10 m s⁻¹ increased from 236.83 to 300.31 mAh g⁻¹, and the capacity retaining rate (R_h) decreased from 78.69 to 62.29%. The substituting Mm with La had an insignificant effect on the activation capabilities of the as-cast and quenched alloys.     

固化剂改良黄土的水稳定特性

选用新型高分子材料SH固化改良黄土,研究了改良黄土的室内静水崩解、浸水强度及干湿循环模拟试验下的水稳定特性.结果表明：素黄土在静水中湿化严重,而SH改良黄土在静水中则结构形态完好,无崩解现象;改良黄土浸水后强度降低较大,但烘干后强度仍较高,固化体水稳系数大于0.8,且其水稳性效果优于水泥黄土;干湿循环15次后改良黄土仍然能保持较高的强度值,质量损失也较小,试件整体性良好.SH为水溶性液体改良材料,其使用方便,用较少量就可以有效提高黄土的强度,增强黄土的水稳定特性,且效果明显.研究结果可为黄土地区渠道、土坝护坡、边坡等工程的加固改良提供依据和指导.     

谈高性能土壤固化类混合物作路面基层的应用

提出了将高性能土壤固化类混合物应用于一般路面基层的做法,分析了高性能固化类混合料基层的原材料,详细介绍了高性能土壤固化类混合料作路面基层施工工艺,指出该施工工艺简单,具有很好的经济效益和社会效益.     

Mg97ZnY2合金中LPSO结构的研究现状

综述了国内外几种制备Mg97ZnY2合金的工艺特点和研究现状,分析了该合金中几种不同长周期结构(Long period stacking ordered structure,简称LPSO)的形成机制及堆跺方式,提出了Mg97ZnY2合金当前研究的主要问题,并展望了Mg97ZnY2合金应用于现实生产的前景.     

超音速电弧喷射雾化制备AgNi15复合颗粒(英文)

采用超音速电弧喷射雾化法(UASA)制备高熔点、难互溶的AgNi15复合颗粒,采用筛分法测量复合颗粒粒度分布,使用SEM、EDS和XRD分析颗粒形貌、凝固组织结构和亚稳固溶扩展。结果表明:采用UASA制备的AgNi15复合颗粒具有球形度高和分散性好的特点,直径小于74和55μm颗粒的质量分数分别为99.5%和98%。复合颗粒凝固组织结构为富镍相β(Ni)球形颗粒弥散分布在富银相α(Ag)基体中,而较大的β(Ni)颗粒中又弥散分布着α(Ag)颗粒。Ag和Ni相互实现了亚稳固溶扩展,在室温条件Ni在Ag中的固溶度在0.16%~0.3%之间(摩尔分数)。     

不同慢压射速度条件下AZ91D镁合金的真空辅助压铸

对不同慢压射速度条件下真空辅助对AZ91D镁合金压铸件组织及力学性能的影响进行了评估。在联合有自行改进的TOYO真空系统的TOYO BD-350V5型冷室压铸机上制备片状AZ91D镁合金压铸件。研究发现,充型时型腔真空压力随着慢压射速度的升高呈现3次方增长,导致真空辅助对压铸件中气孔的降低能力随着慢压射速度的降低而下降。常规和真空压铸件中压室预结晶组织（ESC）含量随着慢压射速度的变化趋势相似。在较低慢压射速度时,真空压铸件拉伸性能受ESC含量的影响很大,随着慢压射速度的升高,真空压铸件中气孔含量的影响将变得显著。     

西洋参口腔速溶片的研制

以西洋参提取物为原料,研究西洋参浸膏粉制备口腔速溶片的工艺,确定合理的原辅料配比。以崩解时间、口感为考察指标,通过单因素试验及正交试验优化产品配方。结果表明:西洋参浸膏粉20%,联合崩解剂羧甲基淀粉钠(CMS-Na)、微晶纤维素(MCC)、低取代羟丙基纤维素(L-HPC)的添加量分别为12%,20%,8%,复合矫味剂薄荷脑、三氯蔗糖、柠檬酸的添加量分别为0.4%,1.0%,0.2%,甘露醇为稀释剂,制备的口腔速溶片崩解迅速,口感良好,服用方便。