TECHNICAL INTRODUCTION
Technical introduction
Technical comparison
- 分类:Technical introduction
- Release time:2018-11-14 00:00:00
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达Crokin phase diagram
Electrostatic spraying metallographic diagram
Metallographic diagram of zincizing
Metallographic diagram of zinc-nickel infiltration layer
Comprehensive comparison of various surface treatment technologies
Comparison item |
galvanizing |
Hot dipping zinc |
dacromet |
Powder zincizing |
Multicomponent zinc-aluminum infiltration |
Zinc-nickel infiltration layer |
酸洗 |
有 |
有 |
无 |
有 |
无 |
无 |
氢脆 |
有 |
有 |
无 |
无 |
无 |
无 |
Neutral salt spray test (h) |
≤100 |
≤480 |
≥1000 |
≥240 |
≥500 |
最大6000 |
Sulfur dioxide resistance |
差 |
差 |
差 |
差 |
差 |
好 |
Adhesive force |
较好 |
较好 |
差 |
较好 |
较好 |
好 |
Hardness (HV) |
180-200 |
70-80 |
2H |
>250 |
>250 |
200-500 |
Abrasion resistance |
较差 |
较好 |
差 |
较好 |
好 |
好 |
Appearance uniformity |
好 |
差 |
好 |
较好 |
好 |
好 |
Mating effect |
较小 |
大 |
较小 |
较小 |
较小 |
较小 |
Note: Varies according to material and heat treatment process。
Residual stress on the surface of the elastic strip
|
Residual stress at 0° (MPa) |
Residual stress at 90° (MPa) |
Before zinc-nickel infiltration |
-49.5±4.6 |
-69.0±4.3 |
-114.5±30.9 |
-81.1±27.4 |
|
-70.0±23.0 |
-63.0±18.0 |
|
After zinc-nickel infiltration |
-282.6±4.6 |
-329.8±8.5 |
-195.8±7.4 |
-299.8±6.4 |
|
-340.0±15.5 |
-294.3±19.8 |
Fatigue life comparison between zinc-nickel permeating layer and dacromet (Wind bolt)
Hardness of zinc-nickel infiltration layer after different materials and heat treatment states
Hot rolled mild steel (Q235) - diffused layer hardness slightly higher than matrix hardness |
产品 |
Sample number |
Diffusion layer |
平均 |
基体 |
平均 |
HV0.025 |
HRB |
||||
Gauge damper |
1 |
200 208 189 |
199 |
65.5 65.0 66.0 |
66.0(130HV) |
2 |
198 232 215 |
215 |
67.0 65.5 65.0 |
66.0(130HV) |
|
3 |
232 203 232 |
222 |
70.5 69.5 66.5 |
69.0(135HV) |
|
4 |
196 189 173 |
186 |
67.0 67.5 70.0 |
68.0(135HV) |
|
Screw spike |
1-1 |
271 283 247 |
267 |
82.0 81.5 82.0 |
82.0(170HV) |
1-2 |
251 232 241 |
241 |
80.0 80.0 79.0 |
79.5(165HV) |
|
2-1 |
226 215 221 |
221 |
82.5 81.5 82.0 |
82.0(170HV) |
|
2-2 |
208 215 205 |
209 |
80.0 81.0 79.0 |
80.0(165HV) |
Hot rolled medium carbon steel (45 steel) and unquenched tempered cast iron - diffusion layer hardness slightly higher than the matrix hardness
产品 |
Diffusion layer |
平均 |
基体 |
平均 |
HV0.1 |
||||
45钢 |
351 374 353 351 356 |
357 |
276 274 271 270 276 |
273 |
QT400-15 |
325 325 321 320 327 |
324 |
232 238 230 235 238 |
235 |
Quenched - tempered medium carbon alloy steel - diffusion layer hardness is slightly lower than the matrix hardness
产品 |
Diffusion layer |
平均 |
基体 |
平均 |
HV0.1 |
||||
Type II Strip (60Si2CrA) |
433 429 436 414 429 |
428(44.0HRC) |
468 460 468 464 456 |
463(46.5HRC) |
Wind Power Bolt (42CrMoA) |
338 328 331 346 344 |
337(36.5HRC) |
375 352 378 346 357 |
362(39.0HRC) |
321 311 326 326 314 |
320(35.0HRC) |
358 354 344 346 354 |
351(38.0HRC) |
|
366 346 352 375 362 |
360(39.0HRC) |
358 357 360 366 378 |
364(39.5HRC) |
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Copyright © 2020 Chongqing Dayou Surface Technology Co., LTD
Chongqing ICP for 16005686