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英语翻译3.ResultsCross-sectionmacrographsofthefourweldsarepresentedinFigs.2and3.Thereareminordifferencesinweldshapeasaresultofchangingtheshieldgas,butthemaindifferenceistheincreaseinweldwidthbetweenthefast(9m/m
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英语翻译
3.Results
Cross-section macrographs of the four welds are presented inFigs.2 and 3.There are minor differences in weld shape as a resultof changing the shield gas,but the main difference is the increasein weld width between the fast (9 m/min) and slow (1.5 m/min)welds.
This increase in weld width at reduced welding speed is a resultof increased lateral thermal conduction associated with longerlaser-material interaction times.
The cross sections presented in Fig.4 were etched in NaOH liq-uid using a voltage of 2.5 V for 10 s.This etching technique makesthe ferrite areas corrode more and become darker.The austen-ite and ferrite phase contents of the welds were then measured from the cross sections by using the area measurement system ofa Keyence VHX 2000 microscope.The austenite contents of thewelds are shown in Table 2.It is apparent that the use of nitro-gen as the weld shield gas increases the austenite level of the weldproduced.fig指的是图
3.Results
Cross-section macrographs of the four welds are presented inFigs.2 and 3.There are minor differences in weld shape as a resultof changing the shield gas,but the main difference is the increasein weld width between the fast (9 m/min) and slow (1.5 m/min)welds.
This increase in weld width at reduced welding speed is a resultof increased lateral thermal conduction associated with longerlaser-material interaction times.
The cross sections presented in Fig.4 were etched in NaOH liq-uid using a voltage of 2.5 V for 10 s.This etching technique makesthe ferrite areas corrode more and become darker.The austen-ite and ferrite phase contents of the welds were then measured from the cross sections by using the area measurement system ofa Keyence VHX 2000 microscope.The austenite contents of thewelds are shown in Table 2.It is apparent that the use of nitro-gen as the weld shield gas increases the austenite level of the weldproduced.fig指的是图
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3.结果
四种焊接的连接部分的直观视图见图2和图3. 由于换了保护气,焊接形状的差别很小,主要的区别是快速焊接（9米每分钟）和慢速焊接（1.5米每分钟）之间的焊接宽度的增加
在减缓焊接速度时导致的焊接宽度增加的原因是：材料-激光反应时间的延长致使侧面热传导的增加
图4显示的焊接交叉点是被氢氧化钠液体以2.5伏电压蚀刻10秒的.该蚀刻技术使铁氧化区域蚀化更多,颜色也更暗.焊接的奥氏体和铁氧物相面积可以用Keyence VHX 2000显微镜观察焊接交叉处测得.焊接的奥氏体面积（或成分?）示于表2. 很显然,氦气作为保护气体的使用使焊接的奥氏体等级升高了.
人工翻译
四种焊接的连接部分的直观视图见图2和图3. 由于换了保护气,焊接形状的差别很小,主要的区别是快速焊接（9米每分钟）和慢速焊接（1.5米每分钟）之间的焊接宽度的增加
在减缓焊接速度时导致的焊接宽度增加的原因是：材料-激光反应时间的延长致使侧面热传导的增加
图4显示的焊接交叉点是被氢氧化钠液体以2.5伏电压蚀刻10秒的.该蚀刻技术使铁氧化区域蚀化更多,颜色也更暗.焊接的奥氏体和铁氧物相面积可以用Keyence VHX 2000显微镜观察焊接交叉处测得.焊接的奥氏体面积（或成分?）示于表2. 很显然,氦气作为保护气体的使用使焊接的奥氏体等级升高了.
人工翻译
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