文档介绍：Welding procedure specification (WPS)
焊接工艺标准
Kevin Mo
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What is a WPS? 什么是焊接工艺标准(WPS)?
焊接工艺标准是为了制造符合标准要，共四十四页。
Weld Process Selection 焊接工艺选择
The “ideal〞 welding process is that which achieves the minimum specification requirements at the minimum cost...
完美的焊接工艺是那种以最小本钱获得标准要求的最低水平……
The Practical Welding Engineer
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Variables 焊接变素
重要变素essential variables
影响接头弯曲和拉伸性能的因素Affect the bend ability and tension ability of joint
非重要变素non essential variables
对弯曲和拉伸不能产生明显影响的因素Can’t produce visible affection on bend ability and tension ability of joint
附加重要变素supplemental essential variables
影响接头冲击性能的因素Affect the toughness of joint
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Essentials listed in AWS
AWS 对各种焊接方法重要变素的规定
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Essentials in GMAW or FCAW GMAW and FCAW中的重要变素(AWS)
Filler 填充材料
Increase in filler metal classification strength增加填料的强度
Change from one electrode classification to any other electrode classification，limited to FCAW从一种焊丝型号改变到另一种焊丝型号〔只限药芯焊丝〕
Change to an electrode classification not covered in AWS ,,,
Electrode焊丝
Change in nominal electrode diameter :焊丝直径变化〔实芯焊丝〕，焊丝直径增加〔药芯焊丝〕
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Electrical parameters焊接参数
A change in the amperage for each diameter每种焊丝直径的电流变化超过10％
A change in type of current (ac or dc) or polarity and mode of transfer (GMAW only)电流极性变化或GMAW过渡模式变化
A change in the voltage for each diameter，surpass 7%电压改变超过7％
An increase or decrease in the wire feed speed for each electrode diameter surpass 10%送丝速度改变超过10％
Essentials in GMAW or FCAW GMAW and FCAW中的重要变素(AWS)
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A change in the travel speed surpass 25%焊接速度改变超过25％
An increase in heat input surpass 10%热输入增加超过10％
Shielding gas保护气
A change in shielding gas from a single gas to any other single gas or mixture of gas, or in the specified nominal percentage composition of a gas mixture, or to no gas保护气从单种气体变为其它单种气体或混合气体
Essentials in GMAW or FCAW GMAW and FCAW中的重要变素(AWS)
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A change in total gas flow rate气体流量增加大于5