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Non-quenched and tempered steel used for welding and electroplating hydraulic rod and production method thereof

A technology of non-quenched and tempered steel and production method, applied in the field of non-quenched and tempered steel, can solve the problems of increasing heat treatment equipment investment and heat treatment process, hydraulic rod heat treatment deformation waste, etc., to achieve improved purity, good comprehensive mechanical properties, cutting process The effect of excellent performance

Active Publication Date: 2013-01-30
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after quenching and tempering heat treatment with 45 quenched and tempered steel, it is easy to cause heat treatment deformation and waste of hydraulic rods, and increase the investment in heat treatment equipment and heat treatment process

Method used

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  • Non-quenched and tempered steel used for welding and electroplating hydraulic rod and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The composition and content of the non-quenched and tempered steel for welded electroplated hydraulic rods produced in this embodiment are shown in Table 1.

[0057] The specific production method is as follows: production by electric furnace continuous casting process, including primary smelting process, refining process, VD vacuum degassing process, continuous casting process and rolling process:

[0058] In the primary smelting process, electric furnace smelting is used, and the content of C at the control end point is 0.10wt%, the content of P is 0.009wt%, the content of Ni is 0.10wt%, the content of Cu is 0.09wt%, and the content of Mo is 0.05wt% %, and the tapping temperature of molten steel is 1645°C.

[0059] In the refining process, the LF furnace is used for refining, and the aluminum wire 2.1m / t steel is fed for deoxidation before a sample is taken for analysis; the silicon-calcium wire 1.6m / t steel is fed for calcium treatment before the steel is tapped in t...

Embodiment 2

[0064] The composition and content of the non-quenched and tempered steel for welded electroplated hydraulic rods produced in this embodiment are shown in Table 1.

[0065] The specific production method is as follows: production by electric furnace continuous casting process, including primary smelting process, refining process, VD vacuum degassing process, continuous casting process and rolling process:

[0066] In the primary smelting process, the electric furnace is used to smelt, and the content of C at the end point is 0.12wt%, the content of P is 0.010wt%, the content of Ni is 0.08wt%, the content of Cu is 0.05wt%, and the content of Mo is 0.03wt%. %, and the tapping temperature of molten steel is 1641°C.

[0067] In the refining process, the LF furnace is used for refining, and the aluminum wire 2.2m / t steel is fed for deoxidation before a sample is taken for analysis; the silicon-calcium wire 1.8m / t steel is fed for calcium treatment before the steel is tapped in the ...

Embodiment 3

[0072] The composition and content of the non-quenched and tempered steel for welded electroplated hydraulic rods produced in this embodiment are shown in Table 1.

[0073] The specific production method is as follows: production by electric furnace continuous casting process, including primary smelting process, refining process, VD vacuum degassing process, continuous casting process and rolling process:

[0074] In the primary smelting process, the electric furnace is used to smelt, and the content of C at the control end point is 0.12wt%, the content of P is 0.009wt%, the content of Ni is 0.03wt%, the content of Cu is 0.05wt%, and the content of Mo is 0.07wt% %, and the tapping temperature of molten steel is 1640°C.

[0075]In the refining process, the LF furnace is used for refining, and the aluminum wire 2.2m / t steel is fed for deoxidation before a sample is taken for analysis; the silicon-calcium wire 1.5m / t steel is fed for calcium treatment before the steel is tapped i...

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Abstract

The invention discloses non-quenched and tempered steel used for welding and electroplating a hydraulic rod and a production method thereof. The non-quenched and tempered steel consists of the following elements according to mass percentages: 0.28-0.35% of C, 0.30-0.80% of Si, 1.00-1.60% of Mn, 0.10-0.30% of Cr, 0.06-0.20% of V, 0.015-0.10% of Ti, less than or equal to 0.020% of P, 0.010-0.035% of S, 0.020-0.060% of Alt, less than or equal to 0.20% of Cu, less than or equal to 0.20% of Ni, less than or equal to 0.10% of Mo, less than or equal to 15*10-4% of O and the balance of Fe and unavoidable impurities. The strength and plasticity index of the non-quenched and tempered steel reaches the level of 45 quenched and tempered steel, and the non-quenched and tempered steel is excellent in machinability and good in welding technological properties. The production method of the non-quenched and tempered steel solves the technical problems of low castability of molten steel caused by adding S and the like, and improves the purity of the steel. The non-quenched and tempered steel provided by the invention can be used for replacing the 45 quenched and tempered steel for manufacturing the hydraulic rod without thermal refining, thus belonging to energy-saving and environmentally-friendly steel.

Description

technical field [0001] The invention belongs to the technical field of non-quenched and tempered steel, and in particular relates to a non-quenched and tempered steel for welding and electroplating hydraulic rods and a production method thereof. Background technique [0002] As an important part of construction machinery hydraulic cylinders, presses or elevator hydraulic tools, electroplated hydraulic rods are used in loader hydraulic cylinders, excavator hydraulic cylinders, road machinery hydraulic cylinders, construction machinery hydraulic cylinders, special hydraulic cylinders and electric and hydraulic cylinders. Servo cylinders and other fields. With the rapid development of construction machinery, construction machinery and automobile transportation in recent years, its market and application have also grown strongly. Since electroplating hydraulic rods are matched with precision instruments such as heavy-duty construction machinery, construction machinery, automobi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/28C22C33/04C21D8/06
Inventor 戈文英翟正龙张君平李泰袁淑君于学文
Owner LAIWU IRON & STEEL GRP
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