Production method of s275jr thick gauge boron steel plate
A technology of S275JR and production method, which is applied in the production field of S275JR thick boron-added steel plate, can solve the problems of high manufacturing cost, long production cycle, and mechanical properties that do not meet the standard requirements, and achieve reasonable composition and process design and loose process system , the effect of good economic benefits
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0042] Adopting thickness is 250mm slab, and slab furnace temperature is 1180 ℃, and slab heating time is 270 minutes, and the (weight percentage) chemical composition of slab is: C 0.13%, Si 0.2%, Mn 1.0%, P 0.02%, S 0.005%, Als 0.017%, Ca 0.0015%, B 0.0011%, the balance is Fe and unavoidable impurities. Rolled into a steel plate with a thickness of 50 mm, the detailed rolling and cold removal process is shown in Table 1, and its mechanical properties are shown in Table 2. The steel plate meets the requirements of the first-level flaw detection.
[0043] Such as figure 1 Shown is the metallographic structure diagram of the steel plate in Example 1 of the present invention. It can be seen from the metallographic diagram that the structure of the steel plate is ferrite + pearlite, the ferrite is the majority, the grains are fine and uniform, and there is no mixed crystal phenomenon. Since ferrite accounts for the majority, the grains are fine, and ferrite has good plasticity...
Embodiment 2
[0049] The thickness of the slab is 250mm, the temperature of the slab out of the furnace is 1220°C, the heating time of the slab is 410 minutes, and the chemical composition of the slab (percentage by weight) is: C 0.15%, Si 0.4%, Mn 1.2%, P0.014% , S 0.01%, Als 0.027%, Ca 0.003%, B 0.0016%, the balance is Fe and unavoidable impurities. Rolled into a steel plate with a thickness of 100 mm, the detailed rolling and cold removal process is shown in Table 3, and its mechanical properties are shown in Table 4.
[0050] Such as figure 2 Shown is the metallographic structure diagram of the steel plate in Example 2 of the present invention. It can be seen from the metallographic diagram that the structure of the steel plate is ferrite + pearlite, and the ferrite accounts for the majority. The grains along the thickness direction of the steel plate are fine and uniform, and there is no mixed crystal phenomenon. Since ferrite accounts for the majority, the grains are fine, and ferr...
Embodiment 3
[0056] Adopting thickness is 250mm slab, and slab furnace temperature is 1205 ℃, and slab heating time is 373 minutes, and the (weight percent) chemical composition of slab is: C 0.14%, Si 0.25%, Mn 1.08%, P 0.013%, S 0.007%, Als 0.022%, Ca 0.0021%, B 0.0014%, the balance is Fe and unavoidable impurities. Rolled into a steel plate with a thickness of 60mm, the detailed rolling and cold removal process is shown in Table 5, and its mechanical properties are shown in Table 6.
[0057] Such as image 3 Shown is the metallographic structure diagram of the steel plate in Example 3 of the present invention. It can be seen from the metallographic diagram that the structure of the steel plate is ferrite + pearlite, and the ferrite accounts for the majority. The grains along the thickness direction of the steel plate are fine and uniform, and there is no mixed crystal phenomenon. Since ferrite accounts for the majority, the grains are fine, and ferrite has good plasticity and toughnes...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More