The microstructure and mechanical properties of welded joint of ultra-fine grained rebar were studied.

研究了超細(xì)晶粒鋼筋焊接接頭的組織和力學(xué)性能操X国产。

The results indicate that the method can accurately simulate temperature field of welded joint of heat-resistant steel.

結(jié)果表明，所建立的模型可以較準(zhǔn)確的模擬耐熱鋼焊接溫度場av在线www天堂网。

In addition, longitudinal or transverse residual stress distribution of welded joint can be improved by using of trailing peening.

此外黄片视频免费观看，焊接接頭的縱向及橫向殘余應(yīng)力分布狀態(tài)均有了很大程度的改觀，應(yīng)力水平相對(duì)較低2021精品手机在线，有利于焊接結(jié)構(gòu)的尺寸穩(wěn)定亚洲26UUU。

Using metallographic analysis, original structure and surface deficiency were obtained, the influence of the structure on corrosion speed was settled, the surface macrography patterns of welded joint in different temperature and concentration were got. Microscopic patterns after corrosion in different condition were gained by SEM, though which the influence of temperature, concentration and structure on corrosion was easily observed.

采用金相分析法，不僅獲得了腐蝕前焊接接頭的原始金相組織以及表面缺陷一级黄色毛片视频免费看，確定了組織及缺陷對(duì)腐蝕速率的影響国产91精品专区，而且得到了焊接接頭在不同溫度、濃度條件下腐蝕后的宏觀形貌A片网站打开了视频链接，采用場發(fā)射掃描電子顯微鏡得到了焊接接頭在不同條件下腐蝕后的微觀形貌欧美亚洲图片小说，從而直觀地得到了溫度、濃度以及組織對(duì)焊接接頭腐蝕速率的影響天天狠天天透天干天天喷水。

The macrostructure of the friction welded joint and the microstructure of welding area was examined and analyzed, it was found that the simulation results agree well with the experimental results.

對(duì)接頭的宏觀形貌和焊縫區(qū)的微觀組織進(jìn)行觀察分析国产精品强奸乱伦贵州，發(fā)現(xiàn)模擬結(jié)果與實(shí)驗(yàn)結(jié)果吻合較好。

According to the maximum likelihood method inferred, the fatigue test of the incomplete penetration welded joint s was conducted, and the P S N curves were obtained.

按照得到的極大似然方法九九色精品国偷自产视频下载，進(jìn)行了含未焊透缺陷接頭的疲勞試驗(yàn)在线观看免费的黄色视频，得到了相應(yīng)的P S N曲線。

The results show that the orientation of crystal grain is changed and crystal grain is refined by magnetic field. The optimal properties of welded joint appears when magnetic field frequency is 20 Hz.

結(jié)果表明黄色视频中文字幕，外加縱向磁場通過電磁攪拌作用改變晶粒的結(jié)晶方向学生妹网站、細(xì)化晶粒，在磁場頻率為20 Hz時(shí)欧美日一级大片，焊接接頭的力學(xué)性能達(dá)到最佳亚洲欧美性爱视频日韩字幕。

Though the gyration and retroflexion of the workbench, the welding positioner can make the welding line to an ideal position, which can improve the quality of the welded joint, reduce welder's workload. It is ideal equipment especially fit to weld the kinds of workpiece, just like the shaft, tray, canister, and so on.

焊接變位機(jī)可水平翻轉(zhuǎn)角度，通過工作臺(tái)的回轉(zhuǎn)及翻轉(zhuǎn)運(yùn)動(dòng)使工件上焊縫處于最理想的位置進(jìn)行焊接，從而大大提高焊縫質(zhì)量久草新日韩，減輕焊工勞動(dòng)強(qiáng)度抠逼黄片15.0，尤其是適合焊接各種軸類、盤類av免费体验区试看、筒體等回轉(zhuǎn)工件的理想設(shè)備9reav。

In this case,welded joint with smaller volume are more favorable.

在這情況，用比較小的體積焊接關(guān)節(jié)是更有利的www黄视频在线观看。

This method can be used to measure the JIC of welded joint.

該方法能夠用于測試焊接接頭的J_值人人插人人操人人看。