The natural vanadiferous rutile was modified by heating, quenching and electron irradiation, and the different photoactivities of samples under different treatments were studied.

天然含釩金紅石樣品經(jīng)過1273K加熱在线免费看一级片、淬火和高能電子輻照處理后性質(zhì)發(fā)生不同程度的變化。

Steel flat products for pressure purposes - Technical delivery conditions - Part 6: Weldable fine grain steels, quenched and tempered

壓力用途扁鋼產(chǎn)品精品熟女少妇免费播放A片视频。交貨技術(shù)條件久久久国产一级AV片。第6部分：淬火和回火的可焊接細(xì)粒鋼

All of the parts made from high quality alloyed steel, and processed through carbonizing and quenching or improving quality.

另部件全部采用優(yōu)質(zhì)合金鋼制造，并經(jīng)滲碳淬火或調(diào)質(zhì)處理具有承載能力強(qiáng)及使用壽命長等特點(diǎn)色哟哟m3u8免费视频。

Through analyzing and testing the process of carbonizing pump barrel ,the relationship between induction hardening parampters,hole size and body hardness was summarized.

通過對滲碳泵筒加工工藝的分析和試驗(yàn)99亚洲国产精品二产精品，總結(jié)出中頻感應(yīng)淬火工藝參數(shù)和工件內(nèi)孔尺寸亚洲无码激情、基體硬度之間的對應(yīng)關(guān)系，為泵筒生產(chǎn)時(shí)內(nèi)孔尺寸精珩余量的確定提供了依據(jù)最新精品国偷一区二区。

By 666 B.C. the process of casehardening was in use for the edges of iron tools, but the story that the Egyptians had some secret means of hardening copper and bronze that has since been lost is probably without foundation.

大致公元前666年可在线观看网站91。表面硬化方法用于鐵工具刃口，但是埃及人的傳說有部分秘密未满十八禁止免费网址，意指銅和青銅的淬火黄色色色色色色色，沒有根據(jù)可能工藝已經(jīng)失傳了。

However, Crackles, the shortcoming of heat - treating out of quenching, is one of the main reasons why machine parts can't be used longer or are even useless.

但由于淬火而產(chǎn)生的熱處理缺陷——裂紋操逼污视频网站。也是使零件降低使用壽命甚至報(bào)廢的重要原因之一黄页免费视频观看。

Mainly for spare parts heat treatments and so on metal parts quenching, cyaniding, annealing and tempering uses, especially is suitable for the fastener, the standard letter heat treatment.

主要供備件金屬零件淬火、氰化人人爽人人超人人高潮、退火和回火等熱處理用学生妹97人人摸人人操浪潮，尤其適用于緊固件、標(biāo)準(zhǔn)件熱處理91人妻最真实的绿帽。

Mainly uses in the laboratory for each heat treatments and so on metal parts quenching, cyaniding, annealing and tempering uses, especially is suitable for the fastener, the standard letter heat treatment.

主要用于實(shí)驗(yàn)室供各種金屬零件淬火在线观看黄片免费、氰化、退火和回火等熱處理用乱色欧美激惰午夜，尤其適用于緊固件黄在线视频免费在线播放、標(biāo)準(zhǔn)件熱處理。

Mostly uses in the laboratory for each heat treatments , for example metal parts quenching, cyaniding,annealing and tempering, especially is suitable for the fastener, the standard workpiece heat treatment.

主要用于實(shí)驗(yàn)室供各種金屬零件淬火色色图片综合一区、氰化农民工找妓女野战视频、退火和回火等熱處理用，尤其適用于緊固件美女打开双腿扒开屁股眼让男人桶、標(biāo)準(zhǔn)件熱處理欧美性逼。

They are the strengthening-toughening of 40SiMnCrNiMoA by the critical normalizing, the fine macrostructure and property matching between the all drill rod parts, the low tendency of decarburizing and delete the weak inner hole surface owe to the drill-hole and hot-rolled with core process of rolling steel.

本文研究表明，40SiMnCrNiMoA鋼亞溫正火強(qiáng)韌化特性中国一级无码黄片、亞溫正火使釬桿整體性能良好地匹配自拍偷拍欧美性爱视频、較小的脫碳傾向和鉆孔法消除釬桿內(nèi)孔粗糙和脫碳表面是鉆孔法并整體780℃亞溫正火+釬柄淬火和低溫回火的H22-40SiMnCrNiMoA錐體連接小釬桿延壽的主要原因。