花岗岩类岩浆生成及侵位过程中的构造控制作用

花岗质岩浆的生成、分异过程不仅与物理-化学条件有关,而且受控于区域构造。花岗质岩浆的上升、侵位机制除取决于岩浆与围岩的流变性质外,也受构造环境的制约。本文主要讨论花岗岩类岩浆在不同构造环境下对岩浆侵位方式的控制机理,并提出在一个完整的岩浆演化序列中,受构造活动影响发生侵位方式改变的可能性。

腰果壳液改性酚醛树脂(粘合剂)生产技术

目前我国的摩擦材料大部分用酚醛树脂作粘合剂,其缺点是摩耗大,韧性差,摩擦系数热衰退大(即摩擦系数随温度上升而大幅度下降),从而导致刹车失灵,引起交通事故。随着我国高速公路的兴建,车速在不断提高,因此对摩擦材料提出了更苛刻的要求,用通常的酚醛树脂摩擦材料已不能满足需要。

A free-cutting and ductile CuAlMnZnTiB shape memory alloy

The mechanical properties and cutting performance of the designed Cu Al Mn Zn Ti B shape memory alloy were studied by tensile test and microstructure observation. Using X-ray diffractometry, differential scanning calorimetry(DSC) and semi-quantitative shape memory effect test, the microstructure and shape memory effect were analyzed. It is found that lots of βphase and few α phase are formed in the quenching of Cu-7.5Al-9.7Mn-3.4Zn-0.3Ti-0.14B(mass fraction, %) alloy, a great deal of martensite and few α phase are formed in the aging alloy, while the annealing alloy is composed of a great deal of α phase and few βphase. The tensile strength and elongation of the annealed alloy are 649 MPa and 17.1%, respectively. Some tiny and dispersion distributed second phase particles are generated in Ti and B precipitates, greatly improving the alloy machinability.

假人民币的识别

1、纸张识别,人民币纸张采用专用钞纸,主要成份为棉短绒和高质量木浆,具有耐磨、有韧度,挺括、不易折断,抖动时声音发脆响等特点;而假币纸张绵软,韧性差,

巧修电子秒表

物理实验中常常用到电子秒表,但不管是进口的还是国产的电子秒表,往往用不到一年半载就会损坏而不能再用,多数原因是秒表按键下面的金属触片由于韧性差而断掉,有种简单方法可快修秒表,使其恢复使用。

精白红薯粉丝加工技术

传统办法生产的红薯粉丝灰暗,杂质多。用内熟法生产的红薯粉丝色泽虽有改善,但耐煮性差、韧性差、易断条,不受消费者欢迎。下面介绍笔者多年的实践,加工制作出的久煮不糊的精白红薯粉丝,向农民朋友作以推介,助你的产品上档次。