Machining technology of cold rolled alloy flat steel

A processing technology and technology of alloy steel, which is applied in the field of steel processing, can solve problems such as rise, decrease of ductility and plastic index, and deterioration of stamping performance, and achieve the effects of fast forming, increased yield point, and fast speed

Inactive Publication Date: 2019-05-07
黄石市龙飞精密金属加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cold-rolled alloy flat steel is made of hot-rolled steel coils. After pickling to remove scale, it is continuously cold-rolled. The finished product is hard-rolled coils. Rise, ductility and plastic index decline, stamping performance deterioration, can only be used for simple deformation parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of processing technology of cold-rolled alloy flat steel of the present embodiment, comprises the following steps:

[0017] (1) Heat treatment: check the alloy steel raw material, the carbon content of the raw material is 1.9%, heat treatment for the qualified raw material, control the quenching temperature to 830°C, the tempering temperature to 420°C, and the quenching oil temperature to 45°C;

[0018] (2) Shot blasting: Shot blasting is performed on the oxide layer on the surface of the steel, and a projectile with a diameter of 3.5mm is thrown towards the surface of the workpiece to make the surface of the workpiece reach a certain degree of roughness;

[0019] (3) Cold rolling: the steel is pickled, rolled, degreased, annealed and finished in sequence, and the thickness of the steel after cold rolling is 20mm;

[0020] (4) Phosphorus saponification treatment: Phosphate the cold-rolled steel first, and then perform saponification treatment. After the saponific...

Embodiment 2

[0026] A kind of processing technology of cold-rolled alloy flat steel of the present embodiment, comprises the following steps:

[0027] (1) Heat treatment: check the alloy steel raw materials, the carbon content of the raw materials is 1.5%, heat treatment for qualified raw materials, control the quenching temperature to 80°C, the tempering temperature to 400°C, and the quenching oil temperature to 20°C;

[0028] (2) Shot blasting: Shot blasting is performed on the oxide layer on the surface of the steel, and a projectile with a diameter of 2.5mm is thrown towards the surface of the workpiece to make the surface of the workpiece reach a certain degree of roughness;

[0029] (3) Cold rolling: the steel is pickled, rolled, degreased, annealed and finished in sequence, and the thickness of the steel after cold rolling is 10mm;

[0030] (4) Phosphorus saponification treatment: Phosphate the cold-rolled steel first, and then perform saponification treatment. After the saponificat...

Embodiment 3

[0036] A kind of processing technology of cold-rolled alloy flat steel of the present embodiment, comprises the following steps:

[0037] (1) Heat treatment: check the alloy steel raw materials, the carbon content of the raw materials is 2.3%, heat treatment for qualified raw materials, control the quenching temperature to 840°C, the tempering temperature to 450°C, and the quenching oil temperature to 60°C;

[0038] (2) Shot blasting: Shot blasting is performed on the oxide layer on the surface of the steel, and a projectile with a diameter of 5.0mm is thrown towards the surface of the workpiece to make the surface of the workpiece reach a certain degree of roughness;

[0039] (3) Cold rolling: the steel is pickled, rolled, degreased, annealed and finished in sequence, and the thickness of the steel after cold rolling is 30mm;

[0040] (4) Phosphorus saponification treatment: Phosphate the cold-rolled steel first, and then perform saponification treatment. After the saponifica...

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Abstract

The invention discloses a machining technology of cold rolled alloy flat steel. The machining technology of cold rolled alloy flat steel comprises the process steps of heat treatment, shot blasting, cold rolling, phosphorus saponification treatment, cold drawing, secondary heat treatment, secondary cold drawing, packaging and the like, wherein the carbon content of a raw material is 1.5-2.3%; thecold rolled alloy flat steel has high forming speed and high yield, does not damage a coating, and can be made into various cross-sectional forms to meet the requirements of using conditions; and coldrolling can cause large plastic deformation of the steel, so that the yield point of the steel is improved.

Description

technical field [0001] The invention belongs to the technical field of steel processing, in particular to a processing technology of cold-rolled alloy flat steel. Background technique [0002] Flat steel refers to steel with a width of 12-300mm, a thickness of 4-60mm, a rectangular cross-section and slightly blunt edges. The materials of flat steel mainly include carbon structural steel, high-quality carbon structural steel, and low-alloy high-strength structural steel. Flat steel can be finished steel, and can also be used as blanks for welded pipes and thin slabs for stacked thin plates. Flat steel can be used as a finished material to make hoops, tools and mechanical parts, and to be used as structural parts and escalators in buildings. [0003] Cold-rolled alloy flat steel is made of hot-rolled steel coils, which are pickled to remove scale and then cold-rolled. The finished product is hard-rolled coils. Rise, ductility and plastic index decrease, stamping performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/00
Inventor 陈国新陈强王学清
Owner 黄石市龙飞精密金属加工有限公司
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