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Piston rod steel

A technology of piston rod and weight percentage, which is applied in the field of steel for piston rods, can solve problems such as troublesome processing personnel and difficult processing, and achieve the effects of prolonging the maintenance cycle, improving quality and service life, and good surface wear resistance

Inactive Publication Date: 2014-06-18
宁波艾尔迪机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The basic feature of the cylinder rod is the processing of the slender shaft, which is difficult to process and has always troubled the processing personnel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0013] The steel for the piston rod disclosed by the present invention has the weight percent of each component (wt%): carbon: 0.37; silicon: 0.17; manganese: 0.50; sulfur: 0.035; phosphorus: 0.035; chromium: 0.25; nickel: 0.25 ; Copper: 0.25; Other unavoidable impurities: less than 0.1; The balance is iron. Steel die forging temperature is 1200±50°C, final forging temperature is 950-1050°C, air-cooled to 800-900°C in non-oxidizing medium after final forging, then water-cooled to room temperature, sampling 10 groups of 40*40mm column samples, the average of the samples The properties are as follows: yield strength 430MPa; tensile strength 650MPa; tensile elongation 23%.

specific Embodiment 2

[0014] The steel for the piston rod disclosed by the present invention has the weight percent of each component (wt%): carbon: 0.39; silicon: 0.20; manganese: 0.55; sulfur: 0.030; phosphorus: 0.030; chromium: 0.20; nickel: 0.20 ; Copper: 0.20; Other unavoidable impurities: less than 0.1; The balance is iron. Steel die forging temperature is 1200±50°C, final forging temperature is 950-1050°C, air-cooled to 800-900°C in non-oxidizing medium after final forging, then water-cooled to room temperature, sampling 10 groups of 40*40mm column samples, the average of the samples The properties are as follows: yield strength 420MPa; tensile strength 630MPa; tensile elongation 20%.

specific Embodiment 3

[0015] The steel for the piston rod disclosed by the present invention has the weight percent of each component (wt%): carbon: 0.42; silicon: 0.30; manganese: 0.75; sulfur: 0.025; phosphorus: 0.025; chromium: 0.20; nickel: 0.20 ; Copper: 0.20; Other unavoidable impurities: less than 0.1; The balance is iron. Steel die forging temperature is 1200±50°C, final forging temperature is 950-1050°C, air-cooled to 800-900°C in non-oxidizing medium after final forging, then water-cooled to room temperature, sampling 10 groups of 40*40mm column samples, the average of the samples The properties are as follows: yield strength 440MPa; tensile strength 660MPa; tensile elongation 26%.

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PUM

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Abstract

The invention discloses a piston rod steel. The piston rod steel comprises 0.37-0.45wt% of C, 0.17-0.37wt% of Si, 0.50-0.80wt% of Mn, 0.035wt% or less of S, 0.035wt% or less of P, 0.25wt% or less of Cr, 0.25wt% or less of Ni, 0.25wt% or less of Cu, below 0.1% of other inevitable impurities, and the balance Fe. The piston rod steel has the advantages of good strength, strong cutability, good cold plasticity, improvement of the quality of a piston rod, prolongation of the service life of the piston rod, and reduction of the processing difficulty and the processing production cost of the piston rod.

Description

[0001] technical field [0002] The invention relates to a kind of steel material for processing and producing piston rods and other devices with high load, especially a kind of steel for piston rods. Background technique [0003] Piston rod, as the name suggests, is a connecting part that supports the piston to do work. Most of them are used in oil cylinders and cylinder motion actuators. It is a moving part with frequent movements, high technical requirements and large load bearing. Taking the hydraulic cylinder as an example, it consists of cylinder barrel, piston rod (cylinder rod), piston and end cover. The quality of its processing directly affects the life and reliability of the entire product. The processing requirements of the piston rod are high, and the surface roughness requirement is Ra0.4~0.8um, and the requirements for coaxiality and wear resistance are strict. The basic feature of the cylinder rod is the processing of the slender shaft, which is difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/42C22C38/40C22C38/20C22C38/18C22C38/04
Inventor 朱严格
Owner 宁波艾尔迪机械有限公司
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