Overview
| brand | Haitai | model | D998 |
| Welding core diameter | 3.24.05.0 | Grade | D998 |
| producing area | Hebei | type | Overlay welding rod |
| material quality | CrMnNiMo | Drug skin properties | Alkaline welding rod |
| diameter | 3.24.05.0 | length | three hundred and fifty thousand and four hundred |
| welding current | three hundred and twenty | Current amplitude | one hundred and eighty |
| melting point | one thousand and three hundred | working temperature | seven hundred |
| Applicable scope | Suitable for overlaying mechanical parts that are resistant to strong rock wear and tear | Hardness HRC | sixty-eight |
Product Details
D998 wear-resistant welding rod, high alloy surfacing welding rod
Explanation:
HT-D998 wear-resistant surfacing electrode is a graphite coated surfacing electrode that uses direct current reverse connection. The arc is relatively stable, with less splashing and slag, and easy slag removal. Even with alloy cutting tools, the surfacing layer is difficult to cut and can only be ground. The metallographic structure is martensite and coarse composite carbides.
Purpose:
HT-D998 wear-resistant surfacing welding rod is used in situations where strong wear resistance is required, such as small shafts of roller drills, coal hole excavators, lifting buckets, crusher rollers, pump frame barrels, concrete mixer blades, bulldozer and pump blades, dredger blades, high-speed sand mixing boxes, etc.
Chemical composition of deposited metal (%)
C | Mn | W | Cr | B | Total amount of other elements | |
Guaranteed value | 3.00-4.00 | 1.50-3.50 | ≤ 35 | 22.00~32.00 | 0.50-2.50 | ≤ 6.00 |
Example value | three point seven five | two point three zero | thirty-five point five | twenty-nine | one point two zero | —— |
Hardfacing layer hardness: (post weld air cooling) HRC ≥ 75-80
Reference current (DC+)
Welding rod diameter (mm) | φ three point two | φ four | φ five |
Welding current (A) | 90~110 | 140-160 | 180-220 |
Precautions:
1. Before welding, the welding rod must be baked at 300-350 ℃ for 1 hour.
2. The welded parts must be preheated at 400~600 ℃ and the rust, oil stains, etc. on the workpiece must be removed before welding.
3. The length of each overlay welding should not exceed 50-70mm.
4. After welding, the workpiece should be tempered at 600~700 ℃ for 1 hour before slow cooling, or the workpiece should be immediately placed in a dry and preheated sand box or placed in grass ash for slow cooling.