焊接专业英语module-1

“coated” metal rod called the electrode and the work. 焊条电弧焊是用被称为焊条的Hale Waihona Puke Baidu药金属棒和工件之间所产生的电弧进行
加热而形成结合的一种电弧焊工艺。
句中“wherein”相当于“in which”，可译为“在那里”；“called the electrode” 是过去分词短语作后置定语，修饰“a covered or ‘coated’ metal rod”。
Module 1 Shielded Metal Arc Welding
焊条电弧焊 电源 焊钳 药皮 熔池 熔池 分子引力 表面张力 熔滴过渡 交流 直流正接
Phrases
straight polarity direct-current electrode positive (DCEP) reversed polarity referred to as low-carbon steel mild steel low-alloy steel high-strength steel quenched and tempered steel high-alloy steel stainless steel
New Words
mild adj. 低碳的 quench vt. 淬火 temper vt. 回火 stainless adj. 不锈的 corrosion n. 腐蚀 cast n. 铸造，铸型 malleable adj. 可锻的 nickel n. 镍 copper n. 铜 aluminum n. 铝 magnesium n. 镁 precious adj. 贵重的 refractory adj. 难熔的
What is shielded metal arc welding?
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Module 1 Shielded Metal Arc Welding
Shielding is obtained from decomposition of the electrode covering, and filler metal is obtained from the electrode’s metal core and metallic particles in the covering. The source of the shielding and filler metal varies with electrode design. The shielding and filler metal largely control the mechanical, chemical, metallurgical and electrical characteristics.
耐蚀钢 铸铁 可锻铸铁
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Module 1 Shielded Metal Arc Welding
Shielded metal arc welding (SMAW) is an arc welding process wherein
coalescence is produced by heating with an electric arc between a covered or
metallic / / adj. 金属的
mechanical / / adj. 力学的
metallurgical // adj. 冶金的，冶金学的
characteristic / n. 特性，特点
globule // n. 小球, 水珠
tip / n. 末端，尖端
transfer / / vt. 过渡
power source helmet
electrode electrode holder
New Words
shield // vt. 保护
Module 1 Shielded Metal Arc Welding
helmet /n. 面罩
wherein / / adv. 在何处, 在其中
decomposition // n. 分解
alternate // adj. 交替的，轮流的
negative ❖adj. 负的，阴的
polarity n. 极性
positive ❖ n. 正极，阳极
generator // n. 发电机，发生器
flexibility n. 灵活性
investment ❖ n. 投资
nonferrous adj. 非铁的
Module 1 Shielded Metal Arc Welding
Warm-up question: What equipment and materials does shielded metal arc welding require? Please look at the following pictures carefully and try to learn the terms.
gravity / ❖/ n. 重力
New Words
molecular // adj. 分子的
Module 1 Shielded Metal Arc Welding
tension // n. 张力，拉力
commercial // adj. 商业的
instantaneously // adv. 瞬间地
Module 1 Shielded Metal Arc Welding
正接 直流反接 反接 被称为…… 低碳钢 低碳钢 低合金钢 高强度钢 调质钢 高合金钢 不锈钢
Phrases
corrosion-resistant steel cast iron malleable iron
Module 1 Shielded Metal Arc Welding
Module 1 Shielded Metal Arc Welding
Phrases
shielded metal arc welding ( SMAW) power source electrode holder electrode covering molten pool weld puddle molecular attraction surface tension metal transfer alternating current (AC) direct-current electrode negative (DCEN)