Non-quenched and tempered steel applicable to piston rod of oil cylinder of bulldozer

A technology of non-quenched and tempered steel and bulldozer oil is applied in the field of material selection of hydraulic cylinder piston rod of construction machinery and material selection of piston rod of bulldozer oil cylinder, which can solve the problems of low production efficiency and high energy consumption.

Inactive Publication Date: 2013-04-17
SHANDONG RUICHI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional 45# steel quenching and tempering treatment is used as the material for the piston rod of the hydraulic cylinder of the traditional construction machinery. This method has been used for many years. The main problem is that the energy consumption in the quenching and tempering heat treatment process is relatively large, and the production efficiency is low.

Method used

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  • Non-quenched and tempered steel applicable to piston rod of oil cylinder of bulldozer
  • Non-quenched and tempered steel applicable to piston rod of oil cylinder of bulldozer

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Embodiment Construction

[0009] The invention is a non-quenched and tempered steel applied to bulldozer cylinder piston rods, which is composed of the following components in weight percentages: carbon 0.33%, silicon 0.36%, manganese 1.17%, alum 0.1%, sulfur 0.027%, phosphorus ≤ 0.0165% , molybdenum ≤ 0.011%, the balance is iron and a small amount of unavoidable impurities.

[0010] By adding Mn and V trace elements, the grains are refined and the mechanical properties of non-quenched and tempered steel are improved.

[0011] 1. Grain size

[0012] The benchmark requirement is 6.5 or above, and the actual test is 7.

[0013] 3. Mechanical properties

[0014]

[0015] Analysis Project Intermediate frequency surface hardness IF Depth IF organization Bulldozer cylinder piston rod requirements 52∽60HRC 2∽3mm tempered martensite results of testing 55.27 HRC 2.0mm tempered martensite

[0016] Analysis Project UT flaw detection Penetration hardnes...

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Abstract

The invention discloses non-quenched and tempered steel applicable to a piston rod of an oil cylinder of a bulldozer. The non-quenched and tempered steel is characterized by comprising the following components by weight percentage: 0.33 percent of carbon, 0.36 percent of silicon, 1.17 percent of manganese, 0.1 percent of alumen, 0.027 percent of sulfur, not more than 0.0165 percent of phosphor, not more than 0.011 percent of molybdenum, and the balance of iron and a few inevitable impurities. According to the invention, the adopted non-quenched and tempered steel is the material which conforms to the mechanical performance and the welding, medium-frequency hardening and electroplating requirements of the piston rod of the oil cylinder of the bulldozer by utilizing the hardening item generated by microelements in the medium carbon steel without thermal refining according to the specific requirements of the piston rod of the oil cylinder of the bulldozer, and is the new energy-saving material applicable to the piston rod of the oil cylinder of the bulldozer.

Description

technical field [0001] The invention belongs to the field of material selection for piston rods of engineering machinery hydraulic cylinders, and is particularly suitable for the field of material selection for bulldozer oil cylinder piston rods. Background technique [0002] Common 45# steel quenching and tempering treatment is used for the piston rod material of traditional engineering machinery hydraulic cylinders. This method has been used for many years. The main problem is that the energy consumption in the quenching and tempering heat treatment process is large, and the production efficiency is low. Contents of the invention [0003] The object of the present invention is to select alternative materials for the above problems. [0004] Its technical solution is as follows: a non-quenched and tempered steel applied to bulldozer cylinder piston rods, characterized in that it is composed of the following components in weight percentages, carbon 0.33%, silicon 0.36%, ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/12
Inventor 胡岸清
Owner SHANDONG RUICHI MACHINERY
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