multiple-pass weld

简明释义

多道焊缝

英英释义

例句

1.A multiple-pass weld can help distribute heat more evenly across the joint.

使用多道焊接可以帮助更均匀地分配接头的热量。

2.The engineer recommended a multiple-pass weld to ensure the joint's strength under pressure.

工程师建议使用多道焊接以确保接头在压力下的强度。

3.For thicker materials, a multiple-pass weld is often necessary to achieve full penetration.

对于较厚的材料，通常需要进行多道焊接以达到完全渗透。

4.During the inspection, we found that the multiple-pass weld had excellent bead appearance.

在检查中，我们发现多道焊接的焊缝外观非常好。

5.The technician demonstrated how to perform a multiple-pass weld on a pipe fitting.

技术员演示了如何在管件上进行多道焊接。

作文

Welding is a fundamental process in various industries, especially in construction and manufacturing. One of the techniques that welders often use is the multiple-pass weld. This method involves making several passes with the welding torch or electrode to ensure a strong and durable joint between two pieces of metal. Unlike a single-pass weld, which may suffice for thinner materials, a multiple-pass weld is essential for thicker sections where greater strength and integrity are required.The multiple-pass weld technique allows the welder to control the heat input and build up the weld bead gradually. This gradual approach helps to prevent issues such as warping or cracking, which can occur when too much heat is applied at once. By layering the weld, the welder can also ensure better fusion between the base metals and the filler material, resulting in a more robust bond.In practice, a multiple-pass weld may involve different welding positions and angles, depending on the joint configuration and the materials being joined. For instance, in a groove weld, the welder might start from the bottom and work their way up, completing one pass at a time until the joint is filled adequately. Each pass must be carefully inspected to ensure that it meets the required specifications and quality standards.Moreover, the choice of welding technique, type of filler material, and the number of passes required will depend on several factors, including the thickness of the materials, the type of metal, and the intended application of the welded structure. For example, in heavy industrial applications like shipbuilding or pressure vessel fabrication, a multiple-pass weld is often mandatory to withstand high stress and pressure conditions.Another important aspect of multiple-pass weld is the post-weld treatment. After completing the welding process, it's crucial to perform inspections, such as visual checks and non-destructive testing, to identify any defects or weaknesses in the weld. Additionally, the welded joint may require cleaning and possibly heat treatment to relieve any residual stresses and enhance the overall mechanical properties of the weld.In conclusion, the multiple-pass weld technique is an essential skill for welders, particularly when working with thick materials that demand high strength and durability. Understanding the principles behind this method not only enhances the quality of the weld but also contributes to the safety and reliability of the final product. As industries continue to evolve and demand higher standards, the mastery of multiple-pass weld will remain a critical component of welding education and training.

焊接是各个行业中的一项基础工艺，尤其是在建筑和制造业中。焊工通常使用的一种技术是多道焊接。这种方法涉及用焊枪或电极进行多次焊接，以确保两块金属之间形成强大而耐用的接头。与单道焊接相比，单道焊接可能足以满足较薄材料的要求，而多道焊接对于较厚的部件则至关重要，因为它需要更大的强度和完整性。多道焊接技术使焊工能够控制热输入，并逐渐建立焊缝。这种逐步的方法有助于防止因一次施加过多热量而导致的问题，例如翘曲或开裂。通过分层焊接，焊工还可以确保基材与填充材料之间更好的熔合，从而形成更坚固的结合。在实际操作中，多道焊接可能涉及不同的焊接位置和角度，这取决于接头配置和所连接的材料。例如，在沟槽焊中，焊工可能会从底部开始，逐步向上工作，完成一次焊接，直到接头充分填充。每道焊缝都必须仔细检查，以确保其符合所需的规格和质量标准。此外，焊接技术、填充材料的选择以及所需的焊接道数将取决于几个因素，包括材料的厚度、金属类型以及焊接结构的预期应用。例如，在船舶制造或压力容器制造等重工业应用中，多道焊接通常是强制性的，以承受高应力和压力条件。多道焊接的另一个重要方面是焊后处理。完成焊接过程后，进行检查至关重要，例如视觉检查和无损检测，以识别焊缝中的任何缺陷或弱点。此外，焊接接头可能需要清洁，并可能需要进行热处理，以消除任何残余应力并增强焊缝的整体机械性能。总之，多道焊接技术是焊工的一项基本技能，特别是在处理需要高强度和耐用性的厚材料时。理解这种方法背后的原理不仅提高了焊接的质量，而且有助于最终产品的安全性和可靠性。随着各行业的不断发展和对更高标准的需求，掌握多道焊接将始终是焊接教育和培训的重要组成部分。