Details
Product Name: carbon tool steel
Model: T11
Standard: GB / T 1298-1986
● Delivery status: the status of delivery of steel to annealing. By mutual agreement, may not annealed state delivery.
Chemical composition
Carbon C: 1.05 ~ 1.14
Si Si: ≤ 0.35
Manganese Mn: ≤ 0.40
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.035
Chromium Cr: promised to the residual content of ≤ 0.25, ≤ 0.10 (when manufacturing lead bath quench wire)
Ni: to promise the residual content of ≤ 0.20, ≤ 0.12 (when manufacturing lead bath quench wire)
Copper Cu: agreed to the residual content of ≤ 0.30, ≤ 0.20 (when manufacturing lead bath quench wire)
Note: The promise of residual content of Cr Ni Cu ≤ 0.40 (when manufacturing lead bath quench wire)
Mechanical properties
Hardness: annealed state, ≤ 207HB, indentation diameter ≥ 4.20mm; quenching, ≥ 62HRC
Heat treatment process
Heat treatment specifications: sample quenching 760 ~ 780 ℃, water-cooled.
Tempering process
Recommended standard steel T11 temper
Program uses the heating temperature tempering / ℃ heating medium hardness (HRC)
Ⅰ to eliminate stress, stability, organization, and Size 140 ~ 160
160 ~ 180
180 to 200
200 250 Oil 62 64 nitrate or alkali
61 to 63
60 to 62
56 to 61
Ⅱ to eliminate stress, reduce hardness and improve toughness and ductility See Note 2 nitrate, alkali
See Note 2 air furnace
Note: 1. High-precision parts (1 ~ 2μm), in the rough grinding process, it should be re-tempering (aging);
2 tempered hardness is lower than HRC56 specification, selection in Figure 2-22-15;
3 higher than the tempering temperature of 250 ℃, it could also ensure the stability of the workpiece size.
