High Chrome Cast Steel Grate Bar
High Chrome Cast Steel Grate Bar High Chrome Cast Steel Grate Bar High Chrome Cast Steel Grate Bar is high quality and strong furnace strip, its production process is more complex, the cost is high, suitable for high temperature furnace. The advantages of steel grate are high strength, heat...
- Product Introduction
High Chrome Cast Steel Grate Bar
High Chrome Cast Steel Grate Bar
High Chrome Cast Steel Grate Bar is high quality and strong furnace strip, its production process is more complex, the cost is high, suitable for high temperature furnace. The advantages of steel grate are high strength, heat resistance, corrosion resistance, not easy to deformation, long service life. But steel furnace also has disadvantages, its surface is easy to rust, after use should pay attention to anti-rust treatment and maintenance.
Material Analysis
High chromium cast steel is a white cast steel with chromium content between 12% and 28%. Compared with high chrome cast iron, high chrome cast steel has higher hardness and better wear resistance, but also has greater brittleness and poor toughness. In addition, the machining of high chromium cast steel is difficult, casting loose shrinkage hole tendency, high cracking, poor soldability, and the price is more expensive. But it differs from high chrome cast iron in composition and properties. High-chrome cast steel usually contains higher carbon and chromium elements, while adding other alloy elements to improve its mechanical properties and corrosion resistance. High-chrome cast steel also has high hardness and wear resistance, but compared with high-chrome cast iron, with better toughness and impact resistance, it is more suitable for manufacturing parts that need to withstand complex stresses.
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Table. Specification and composition of chromium steel casting Chinese Standard |
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|
Specification |
Chemical Composition (wt.) |
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|
C |
Si |
Mn |
Cr |
Mo |
Ni |
Cu |
|
|
KmTBNi4Cr2 |
2.4-3.0 |
≤0.8 |
≤2.0 |
1.5-3.0 |
≤1.0 |
3.3-5.0 |
/ |
|
KmTBNi4Cr2- |
3.0-3.6 |
≤0.8 |
≤2.0 |
1.5-3.0 |
≤1.0 |
3.3 |
/ |
|
KmTBCr9Ni5 |
2.5-3.6 |
≤2.0 |
≤2.0 |
7.0-11.0 |
≤1.0 |
4.5-7.0 |
/ |
|
KmTBCr2 |
2.1-3.6 |
≤1.2 |
≤2.0 |
1.5-3.0 |
≤1.0 |
≤1.0 |
≤1.2 |
|
KmTBCr8 |
2.1-3.2 |
1.5-2.2 |
≤2.0 |
7.0-11.0 |
≤1.5 |
≤1.0 |
≤1.2 |
|
KmTBCr12 |
2.0-3.3 |
≤1.5 |
≤2.0 |
11.0-14.0 |
≤3.0 |
≤2.5 |
≤1.2 |
|
KmTBCr15Mo2 |
2.0-3.3 |
≤1.2 |
≤2.0 |
14.0-18.0 |
≤3.0 |
≤2.5 |
≤1.2 |
|
KmTBCr20Mo2 |
2.0-3.3 |
≤1.2 |
≤2.0 |
18.0-23.0 |
≤3.0 |
≤2.5 |
≤1.2 |
|
KmTBCr26 |
2.0-3.3 |
≤1.2 |
≤2.0 |
23.0-30.0 |
≤3.0 |
≤2.5 |
≤2.0 |
Chromium Steel Casting Heat Treatment Standard
|
Grades |
Softening annealing treatment |
Hardening |
Stress relief |
|
KmTBCr12 |
Keep at 920-960℃ for 1-8h, slowly cool to 700-750℃ and keep it for 4-8h, cool to below 600℃, then air cooling or furnace cooling |
Heat preservation at 920-980℃ for 2-6h, air-cooled after furnace |
200-300℃ heat preservation for 2-8h, air cooling or furnace cooling |
|
KmTBCr15Mo |
Insulation at 920-960℃ for 1-8h, slow cooling to 700-750℃ for 4-8h, slow cooling to below 600℃ |
Heat preservation at 920-980℃ for 2-6h, air-cooled after furnace |
|
|
KmTBCr20Mo |
960-1000℃ heat preservation for 1-8h, slow cooling to 700-750℃, heat preservation 4-10h, slow cooling to below 600℃, air cooling or furnace cooling |
Heat preservation at 960-1020℃ for 2-6h, air cooling out of the furnace |
|
|
KmTBCr26 |
960-1060℃ heat preservation for 2-6h, air cooling after furnace |
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