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Z308 純鎳鑄鐵焊條

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Z308 純鎳鑄鐵焊條

焊補(bǔ)鑄鐵用的鎳基鑄鐵焊條在鑄鐵焊接中屬于異質(zhì)焊縫的冷態(tài)焊焊條。藥皮為強(qiáng)還原性石墨型，交直流兩用，工藝性能良好，可全位置焊接。焊縫金屬不存在硬而脆的CFe3（滲碳體）即白口組織，所以焊縫金屬具有良好的加工性和承受塑性變形的能力。但熔合區(qū)由于母材成分熔化的影響，仍不可避免地會(huì)有不同程度的白口組織。為了減輕熔合區(qū)硬脆組織對(duì)焊后加工性能的不良影響，使其白口層盡量較少，較薄、且不連續(xù)，施焊時(shí)應(yīng)該嚴(yán)格遵循冷焊工藝規(guī)定操作。另外，某些鑄件（如長(zhǎng)期在高溫、水蒸氣中工作的爐柵，鍋爐等），因其中的碳已被燒損，鑄件具有多空性，變得十分松脆而無(wú)法焊、補(bǔ)。

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產(chǎn)品描述

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標(biāo)準(zhǔn)：

符合 GB EZNi-1

相當(dāng) AWS ENi-CI

說(shuō)明：

Z308是純鎳焊芯，強(qiáng)還原性石墨型藥皮的鑄鐵焊條，可交直流兩用。施焊時(shí)電弧穩(wěn)定，操作方便，焊件可不預(yù)熱，其是鑄鐵冷焊焊條中，抗裂性、切削加工性、焊縫強(qiáng)度等綜合性能較好的一種焊條。

Z308 is a cast iron electrode with a pure nickel core and a strong reducing graphite coating. It can be used for both AC and DC. When welding, the arc is stable, the operation is convenient, and the weldment can be preheated. It is an electrode with better comprehensive performance such as crack resistance, machinability, and weld strength among cast iron cold welding electrodes.

用途：

可用于常溫或稍經(jīng)預(yù)熱（至200℃左右）的重要灰口鑄鐵，如：鑄鐵薄件的加工面，汽缸蓋、發(fā)動(dòng)機(jī)座、齒輪箱以及機(jī)床導(dǎo)軌、鑄鐵制成的機(jī)械零件等的焊、補(bǔ)。

It can be used for the welding of important gray cast irons at room temperature or slightly preheated (to about 200°C), such as: the machined surface of thin cast iron, cylinder heads, engine seats, gear boxes, machine tool guides, mechanical parts made of cast iron, etc. , Make up.

熔敷金屬化學(xué)成分（%）

C	Si	Mn	Fe	Ni	S
≤2.0	≤2.5	≤1.0	≤8.0	≥90	≤0.03

參考電流：AC或DC

焊條直徑（mm）	2.5	3.2	4.0	5.0
焊接電流（A）	50~80	80~100	110~140	150~180

注意事項(xiàng)：

1. 首先清除焊接部位的油污、砂、水、銹等污物，并視缺陷類型，開(kāi)坡口、打止裂孔及熔池造型等準(zhǔn)備措施。

2. 如填補(bǔ)大的空隙，應(yīng)先從四周開(kāi)始堆焊一層，然后向中部逐步填滿。

3. 為避免母材熔化過(guò)多，減少白口層。施焊中，盡量采用小電流，短弧，窄道，短道，分散分段焊，每段焊道長(zhǎng)度一般不超過(guò)50mm，待溫度降至不燙手時(shí)再繼續(xù)施焊。并且施焊后立即錘擊焊縫以松馳應(yīng)力防止裂紋。

4. 施焊前應(yīng)將焊條在150℃左右烘焙一小時(shí)。

1. First, remove oil, sand, water, rust and other contaminants from the welding part, and prepare measures such as beveling, cracking prevention, and molten pool modeling depending on the type of defect.

2. To fill a large gap, start from the surrounding area by surfacing one layer, and then gradually fill it up to the middle.

3. In order to avoid excessive melting of the base material, reduce the white mouth layer. In welding, try to use small current, short arc, narrow track, short track, dispersed segment welding, the length of each segment of the weld generally does not exceed 50mm, and continue welding when the temperature drops to not hot. And immediately after welding, hammer the weld to relax the stress and prevent cracks.

4. The welding rod should be baked at about 150℃ for one hour before welding.

關(guān)鍵詞:

純鎳焊條

鑄鐵焊條

Z308焊條

電焊條

ENi-CI

EZNi-1

鎳基鑄鐵焊條

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