Cast iron ИЧХ28Н2
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Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ИЧХ28Н2 |
| Designation GOST Latin | IChX28H2 |
| Transliteration | IChH28N2 |
| The chemical elements | ИZrCr28Н2 |
Description
Cast iron ИЧХ28Н2 used: for the manufacture of castings hydraulics groundwater pumps hydroabrasive mixture with high resistance against abrasive wear.
Note
Iron brand ИЧХ28Н, is melted in a basic and acidic electric arc and induction furnaces.
Standards
| Name | Code | Standards |
|---|---|---|
| Castings of cast iron (gray and malleable cast iron) | В81 | TU 26-06-1484-87, TU 1-812-0072-94 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe |
|---|---|---|---|---|---|---|---|---|
| TU 26-06-1484-87 | 2.5-3 | ≤0.08 | ≤1 | 0.5-1 | 25-30 | 0.7-1.4 | 1.5-3 | The rest |
Fe is the basis.
According to TU 26-06-1484-87, in order to save nickel, some of it can be replaced by copper (1.0% of nickel is replaced by 2.0% of copper), but not exceeding its maximum solubility. The total mass fraction of nickel and copper in cast iron should not exceed 5.0%. In order to increase the wear resistance, it is possible to apply the modification and microalloying of cast iron with titanium (0.10-0.40%), vanadium (0.10-0.30%), boron (0.01-0.030%). At the same time, the chromium content should be in the range 25.0-27.0%, and of nickel 0.40-0.70%.
According to TU 26-06-1484-87, in order to save nickel, some of it can be replaced by copper (1.0% of nickel is replaced by 2.0% of copper), but not exceeding its maximum solubility. The total mass fraction of nickel and copper in cast iron should not exceed 5.0%. In order to increase the wear resistance, it is possible to apply the modification and microalloying of cast iron with titanium (0.10-0.40%), vanadium (0.10-0.30%), boron (0.01-0.030%). At the same time, the chromium content should be in the range 25.0-27.0%, and of nickel 0.40-0.70%.
Mechanical characteristics
| Brinell hardness number, MPa | HRC |
|---|---|
| Casting on the other 26-06-1484-87. Normalization (hardening) at 950-1000 °C (heating rate 50 °C/h, endurance 3 h), air cooling | |
| 500-550 | 52-56 |
| Casting on the other 26-06-1484-87. Vacation at 300-350 °C (heating rate 50 °C/h, endurance 3 h), air cooling | |
| 500-550 | 52-56 |
| Casting on the other 26-06-1484-87. Softening annealing at 730-750 °C (heating rate 50 °C/h, exposure for 4-6 h), cooling with the furnace | |
| 370-430 | 39-46 |
| Casting on the other 26-06-1484-87. Stress relieving: Vacation at 550-580 °C (heating rate 50 °C/h, endurance 3 h), air cooling | |
| 420-580 | 44-58 |
Description mechanical marks
| Name | Description |
|---|---|
| HRC | Rockwell hardness (indenter diamond spheroconical) |
