Totally closed electric furnace smelting type screw-thread steel

A technology of electric furnace smelting and threaded steel, which is applied in the direction of coating, metal material coating process, etc., can solve the problems of high carburizing content, easy corrosion of threaded steel, brittle steel bars, etc., and achieve perfect overall function, strong practicability and low cost. saving effect

Inactive Publication Date: 2018-06-29
浙江万泰特钢有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the existing rebar, the electric furnace is semi-closed, the carburizing content is high, the steel bar is relatively brittle, and it is easy to break when used, and the rebar produced is easy to rust, and the overall effect is not good.

Method used

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with preferred embodiments.

[0013] A fully enclosed electric furnace smelting threaded steel involved in this embodiment comprises a threaded steel body and an antirust layer coated on the threaded steel body, the antirust layer contains zinc, nickel, and tin elements; the threaded steel Steel body percentage gauge, including: 0.1-0.2% C, 0.3-0.8% Mn, 0.1-0.3% Si, 0.01-0.02% S, 0.02-0.05% P, 0.5-0.6% O, 0.001-0.002% N, 0.2 -0.8% H, the rest is Fe.

[0014] Further, the content of zinc in the anti-rust layer is not more than 50%, and the dark gray powdery metal zinc can be used as a pigment with extremely strong hiding power. It has good anti-rust and atmospheric corrosion resistance, and is often used to make anti-rust paints, strong reducing agents, etc.

[0015] Further, the content of nickel in the anti-rust layer is 10-30%, which is mainly used for coatings and plastics as conductive pigments t...

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Abstract

The invention discloses totally closed electric furnace smelting type screw-thread steel including a screw-thread steel main body and an antirust layer cladding the screw-thread steel main body. The antirust layer internally contains zinc, nickel and tin elements, and the screw-thread steel main body comprises, according to the percentage, 0.1-0.2% of C, 0.3-0.8% of Mn, 0.1-0.3 % of Si, 0.01-0.02%of S, 0.02-0.05% of P, 0.5-0.6% of O, 0.001-0.002% of N, 0.2-0.8% of H, and the balance Fe. The screw-thread steel main body is cladded with the antirust layer, so an antirust effect is played; the antirust layer internally contains a proper proportion of the zinc, nickel and tin elements, so that the most appropriate antirust performance is achieved and the reasonable production cost is controlled; with the content setting of 30% of zinc, 25% of nickel and 30% of tin, the cost savings are reasonably controlled while the rust prevention problem can be effectively solved; the screw-thread steel main body comprises, according to the percentage, 0.15% of C, 0.6% of Mn, 0.2% of Si, 0.015% of S, 0.04% of P, 0.55% of O, 0.0012% of N, 0.4% of H, and the balance Fe, so the screw-thread steel hasthe advantages of high toughness, perfect overall function and high practicability.

Description

technical field [0001] The invention relates to the technical field of threaded steel production, in particular to a fully enclosed electric furnace smelting type threaded steel. Background technique [0002] Rebar is a steel bar with ribs on the surface, also known as ribbed steel bar, usually with 2 longitudinal ribs and transverse ribs evenly distributed along the length direction. The shape of the transverse rib is spiral, herringbone and crescent. Expressed in millimeters of nominal diameter. The nominal diameter of a ribbed steel bar is equivalent to the nominal diameter of a smooth round steel bar of equal cross-section. The nominal diameter of the steel bar is 8-50 mm, and the recommended diameters are 8, 12, 16, 20, 25, 32, 40 mm. Ribbed steel bars are mainly subjected to tensile stress in concrete. Due to the effect of the ribs, the ribbed steel bar has a greater bonding capacity with the concrete, so it can better withstand the action of external forces. Ribb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C23C30/00C22C30/06
CPCC22C38/04C22C13/00C22C18/00C22C30/04C22C30/06C22C38/02C23C30/00
Inventor 黄良勇唐杰王栋
Owner 浙江万泰特钢有限公司
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