查询词典 hard alloy

Besides, n-butyl and sec-butyl tosylate that are difficult for oxidative addition can react with phenylmagnesium bromide to form corresponding cross-coupling products. Primary alkyl halide which contains β-hydrogen and is relatively hard to undergo the reaction , n-butyl chloride for instance, can react with aryl Grignard reagents in the presence of NiB alloy as well.

此外，难以进行氧化加成的对甲苯磺酸正丁酯和对甲苯磺酸仲丁酯可以与苯基溴化镁作用生成相应的交叉偶联产物；反应相对困难的含β-H的伯卤烷，如：正氯丁烷也可以在NiB催化下与芳基格氏试剂发生偶联。

Study the result makes clear, normal temperature ball grinds a condition to fall, cu-Cr mixed powder end realizes alloy to change; to grind the temperature inside coal tub when the ball hard under 10 ℃ when, cu-Cr mixed powder end forms Cr the solid solution in Cu.

探究结果表明，常温球磨条件下，Cu-Cr混合粉末难以实现合金化；当球磨罐内温度低于10℃时，Cu-Cr混合粉末形成Cr在Cu中的固溶体。

The cutting surface quality and its affecting factors of ZA22/Al〓O〓 composites were investigated systematically with hard metal alloy cutter on an engine lathe.

在普通车床上采用硬质合金刀具，首次系统研究了该复合材料的切削加工表面质量及影响因素，发现要获得低的切削加工表面粗糙度应选择小的切削深度、小的刀具进给量及高的切削速度。

The local corrosion area on the hard aluminum alloy of aircraft skin surface was rapidly renovated in-situ by anodising with brush electroplating equipment firstly and then spray painting .

采用电刷镀设备对飞机硬铝合金蒙皮表面局部的腐蚀进行阳极化，然后实施喷漆，从而达到了原位快速修复的目的。

A heat treatment technology was proposed for obtaining hard bainite in the surface layer of low-carbon alloy steel.

研究了19Mn2Cr2NiMoAl低碳合金钢表面获得硬贝氏体组织的热处理工艺及其组织结构特征。

For hard to soften some of the alloy annealed in the quenching after the regular use of high-temperature tempering, so that the appropriate aggregation carbide steel, will reduce the hardness to cut processing of caliche.

对于退火难以软化的某些合金钢，在淬火后常采用高温回火，使钢中碳化物适当聚集，将硬度降低，以利切削加工。

The Ni-based alloy was cladded on the T10 steel surface by laser cladding technology, and the changes of microstructure and properties of Ni-based alloys by adding WC hard phase and nano-rare earth oxides La2O3 were studied.

中文摘要：采用激光熔覆技术在T10钢表面激光熔覆Ni基合金，并研究了在Ni基合金中加入WC硬质相、纳米稀土氧化物La2O3后的性能和组织结构的变化情况。

In spite of many similarities there exist remarkable differences between FeNi and FePt Invar, which distinguish"soft"FeNi Invar from relatively"hard"FePt alloy.

除了许多相似之处，FeNi和FePt合金在很多方面还存在着显著的差别。

Use of alloy chilled cast iron roller, a hard wear-resistant surface, cavity processing, so that the roll surface temperature uniformity.

辊筒采用合金冷硬铸铁，个面坚硬耐磨，内腔加工，使辊面温度均匀。

Use of alloy chilled cast iron roller, a hard wear-resistant surface, cavity plus ah, so that the roll surface temperature uniformity.

辊筒采用合金冷硬铸铁，个面坚硬耐磨，内腔加工，使辊面温度均匀。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。