Fluxes and Wires (SAW) For Hardfacing

Introduction of hard-faced wear-resistant welding materialssubmerged arc welding materials

 

1.Suggestions for welding material selection:


  AWS has no relevant specifications to define materials for submerged arc hard surface welding materials. Therefore, in the selection of welding materials, the content of dissolved gold composition, hardness value and application occasions recommended by manufacturers are used as materials.

 

  This kind of material attaches great importance to the design of welding procedure, that is, what kind of welding material to use, preheating temperature, inter-track temperature, number of welding layers, whether to do post-heating, whether to do post-heat treatment, whether there is a transition layer and other important factors will determine the success or failure and service life of a hard-surface welding workpiece.

 

①For various environments with different working attributes, the recommended hard surface welding materials are as follows:

Workspace Properties

Hard-faced welding material category

Reference wear rate (%)

Reference hardness value (HRC)

High friction

High carbon-high chromium, high special alloys (W, Nb, V, Co, etc.)

0.05 ~ 0.2

50 ~ 75

Medium friction + medium impact

Semi-Austenite, Austenite + Artensite, Matian Scattered steel, Pearlite.

0.2 ~ 8.0

20 ~ 60

High impact

Austenite iron, high manganese steel, medium carbon low alloy steel.

6.0 ~ 20.0

5 ~ 55

 

 

 

②According to the classification of each hard surface welding material according to the organization type, the recommended application occasions are as follows:

Welding method

Welding structure

Reference hardness (HRC)

Application occasion

Covered weld

Charged wire

Submerged arc welding material

Bolai iron system

10~40

Couplers for gears, shafts, rolls, rolling mills, automatic coupling machines for vehicles, foot peripheral fittings of bulldozers and track head surfaces, etc.

SH-26RSH-35R

SH-45SH-45R

SFH-25GSFH-35GSFH-45GSFH-35-OSFH-41-O

SFH-17S*SF-80

Matian scattered iron series

35~65

Rollers or sprockets of bulldozers, idlers or track shoes, digging edges, rollers, bucket end edges, mixing blades, cutting tools and shells of dredgers, etc.

SH-50SH-50N4

SH-60SH-80系列、

SH-90

SFH-42MGSFH-58GSFH-59GSFH-63GSFH-51-OSFH-56-O

SFH-12S*SF-80

SFH-31S*SF-80

SFH-42S*SF-80

SFH-53S*SF-80

SFH-55S*SF-80

High manganese Vosten iron series

45~50

Blade or roller of crusher, hammer of crusher, claw of excavator and track frog.

SH-MN

SFH-MNGSFH-MN-O

--

High carbon-high chromium system

55~68

Coal pulverizer, coal pulverizer rotor, sand pump shell and pump blade, ghost tooth, receiving tooth, blast furnace cover, grinder, etc.

SH-95HCSH-95HN

SFH-61GM

SFH-61NbGM

SFH-62GM

SFH-67NMG

SFH-61-OSFH-65-O

SFH-67-OSFH-70-O

--

Tungsten carbide system

58~65

Blades of bulldozers, lining tools, relieving teeth, cutting tools, concrete cutters and earth drills, etc.

SH-WSH-WM

SFH-66WG

--

Cobalt-chromium-tungsten alloy system

30~55

Bushing of high-pressure pump, moving wheel sleeve, sliding surface of high-pressure valve, turbine blade and various cutters, cutting edge for paper industry, valve seat ring of internal combustion engine, high-temperature and high-pressure valve, injection eye mold, etc.

Stellite weld

--

--

 

 

 

2.Key points of welding operation:

(1)Storage management of welding materials


Suggestions for submerged arc welding materials of the same carbon steel.

 

(2) Precautions for welding


Hard-faced submerged arc welding wires are mostly coated welding wires, so the lower compaction degree of the wire feeding wheel should not be too large to avoid abrasion of the conductive nozzle (TIP) caused by crushing the welding wires.

 

② Attention should be paid to the matching of current, voltage, extension length and migration speed to avoid welding bead formation caused by excessive dilution rate and relevant welding conditions. Please refer to the Recommendations for Selection of Submerged Arc Welding Materials for Carbon Steel.

 

③The alloy content of hard surface welding material is higher, and the internal stress after welding is also higher. As far as possible, the overlap between welds should cover at least half of the width of the previous weld, so as to avoid the occurrence of wavy weld, so as to reduce cracks and weld peeling due to stress concentration.

 

 

View:

SFH-12SxSF80

硬面耐磨用SAW銲接
AWS --
JIS --
EN --
GB --

SFH-17SxSF80

硬面耐磨用SAW銲接
AWS --
JIS --
EN --
GB --

SFH-31SxSF80

硬面耐磨用SAW銲接
AWS --
JIS --
EN --
GB --

SFH-55SxSF80

硬面耐磨用SAW銲接
AWS --
JIS --
EN --
GB --

SF-80

硬面鋼SAW銲藥
AWS --
JIS --
EN --
GB --

SF-82

硬面鋼SAW銲藥
AWS --
JIS --
EN --
GB --

SFH-22SxSF82

硬面耐磨用SAW銲接
AWS --
JIS --
EN --
GB --

SFH-42SxSF80

硬面耐磨用SAW銲接
AWS --
JIS --
EN --
GB --

SFH-53SxSF80

硬面耐磨用SAW銲接
AWS --
JIS --
EN --
GB --