Manufacturing process of spring steel wire rod
A production process, spring steel technology, applied in the field of metallurgy, can solve the problems of poor plasticity and toughness, complex production process, high production cost, etc., and achieve the effect of good physical quality, high dimensional accuracy and high production efficiency
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Embodiment 1
[0017] The production process of 38Si7 spring steel wire rod is characterized in that it includes the following processes: raw material preparation, EAF eccentric bottom tapping electric arc furnace smelting, LF refining outside the furnace, VD vacuum degassing treatment, CCM continuous casting, continuous casting slab shot blasting, flaw detection , Grinding, heating, and high-speed wire rolling mill rolling into wire rod.
[0018] Raw material preparation process: the furnace charge is composed of high-quality steel scrap, molten iron and pig iron, and the composition is as follows (Wt%):
[0019] Table 2
[0020] C
mn
P
S
Si
Cr
Al
Cu
Fe
0.35
0.50
0.025
0.025
1.50
0.35
0.050
0.20
margin
[0021] Control the total amount of harmful residual elements within 0.25%; add 38% of molten iron in each furnace; keep all raw materials in the furnace dry, and add the alloy after baking. ...
Embodiment 2
[0029] The production process of 38Si7 spring steel wire rod is characterized in that it includes the following processes: raw material preparation, EAF eccentric bottom tapping electric arc furnace smelting, LF refining outside the furnace, VD vacuum degassing treatment, CCM continuous casting, continuous casting slab shot blasting, flaw detection , Grinding, heating, and high-speed wire rolling mill rolling into wire rod.
[0030] Raw material preparation process: the furnace charge is composed of high-quality steel scrap, molten iron and pig iron, and the composition is as follows (Wt%):
[0031] table 3
[0032] C
mn
P
S
Si
Cr
Al
Cu
Fe
0.4
0.7
0.020
0.020
1.70
0.3
0.040
0.15
margin
[0033] Control the total amount of harmful residual elements within 0.25%; add 40% of molten iron to each furnace; keep all raw materials in the furnace dry, and add the alloy after baking.
...
Embodiment 3
[0041] The production process of 38Si7 spring steel wire rod is characterized in that it includes the following processes: raw material preparation, EAF eccentric bottom tapping electric arc furnace smelting, LF refining outside the furnace, VD vacuum degassing treatment, CCM continuous casting, continuous casting slab shot blasting, flaw detection , Grinding, heating, and high-speed wire rolling mill rolling into wire rod.
[0042] Raw material preparation process: the furnace charge is composed of high-quality steel scrap, molten iron and pig iron, and the composition is as follows (Wt%):
[0043] Table 4
[0044] C
mn
P
S
Si
Cr
Al
Cu
Fe
0.42
0.80
0.015
0.018
1.80
0.30
0.040
0.1
margin
[0045] Control the total amount of harmful residual elements within 0.25%; add 45% of molten iron to each furnace; keep all raw materials in the furnace dry, and add the alloy after baking. ...
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