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Preparation method of steel applied to bulldozer shovel edge

A technology for bulldozers and shovel blades, which is applied in the field of steel preparation for bulldozer shovel blades, and can solve problems such as not being able to meet the needs of use

Inactive Publication Date: 2014-05-21
锡山区鹅湖慧盾机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, with the advancement of technology and the intensification of competition among enterprises, the products of the existing technology can no longer meet the needs of use, and there is an urgent need for steel for bulldozer blades with better toughness and wear resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing steel for bulldozer blades. The chemical composition of the steel consists of the following components in weight percentage: C: 0.7, Si: 0.2, Mn: 1.2, P≤0.015, S≤0.005, Al: 0.04, Ti: 0.024, Cr: 0.4, V: 0.16, B: 0.002, and the rest are Fe and unavoidable impurities; the preparation method includes the following steps:

[0025] 1) Smelting molten steel, then casting it into a slab, heating the slab to 1210°C, keeping it warm for 2 hours, and then performing rough rolling. %; and then carry out finish rolling at 800-900°C, and the cumulative reduction rate of finish rolling should be at least 20%.

[0026] 2) The slab is subjected to water toughening treatment, the heating temperature is 960°C, the holding time is 1.5×slab thickness + 30min, and after holding the heat, put it into water with a water temperature of 65°C.

Embodiment 2

[0028] A method for preparing steel for bulldozer blades. The chemical composition of the steel consists of the following components in weight percentage: C: 0.9, Si: 0.1, Mn: 1.6, P≤0.015, S≤0.005, Al: 0.02, Ti: 0.028, Cr: 0.2, V: 0.22, B: 0.001, and the rest are Fe and unavoidable impurities; the preparation method includes the following steps:

[0029] 1) Smelting molten steel, then casting it into slab, heating the slab to 1230°C, keeping it warm for 1 hour, and then performing rough rolling. %; and then carry out finish rolling at 800-900°C, and the cumulative reduction rate of finish rolling should be at least 20%.

[0030] 2) The slab is subjected to water toughening treatment, the heating temperature is 980°C, the holding time is 1.5×slab thickness + 30min, and after holding the heat, put it into water with a water temperature of 55°C.

Embodiment 3

[0032] A method for preparing steel for bulldozer blades. The chemical composition of the steel consists of the following components in weight percentage: C: 0.8, Si: 0.15, Mn: 1.4, P≤0.015, S≤0.005, Al: 0.03, Ti: 0.026, Cr: 0.3, V: 0.18, B: 0.0015, and the rest are Fe and unavoidable impurities; the preparation method includes the following steps:

[0033] 1) Smelt molten steel, then cast it into a slab, heat the slab to 1220°C, keep it warm for 1.5 hours, and then carry out rough rolling. %; and then carry out finish rolling at 800-900°C, and the cumulative reduction rate of finish rolling should be at least 20%.

[0034] 2) The slab is subjected to water toughening treatment, the heating temperature is 970°C, the holding time is 1.5×slab thickness + 30min, and after holding the heat, put it into water with a water temperature of 60°C.

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PUM

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Abstract

The invention discloses a preparation method of steel applied to a bulldozer shovel edge. The preparation method comprises the steps that molten steel is smelted, and then is poured into a slab; the slab is heated to the temperature of 1210 to1230 DEG C; heat preservation is carried out for 1 to 2 hours; rough rolling is carried out, wherein the rough rolling starting temperature is 1140 to 1160 DEG C, the rolling finishing temperature is 930 to 950 DEG C, and the rough rolling cumulative reduction rate is at least 70%; finish rolling is carried out at the temperature of 800 to 900 DEG C, and the finish rolling cumulative reduction rate is at least 20%; water toughening is carried out on the slab, wherein the heating temperature is 960 to 980 DEG C, and the heat preservation time=1.5*the thickness of the slab+30min; and after heat preservation, the slab is placed into water at the temperature of 55 to 65 DEG C.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for preparing bulldozer blade steel. Background technique [0002] The bulldozer blade must have the following features: (1) Good comprehensive mechanical properties: high hardness and wear resistance, reducing the wear of the blade when the bucket is shoveling the ground; high toughness, preventing deformation and fracture of the steel plate. (2) Good welding performance: the shovel blade plate is welded on the bottom of the bucket, and the welding part is the stress area of ​​the steel plate, so the steel plate must have certain welding performance. (3) Good machining performance: the steel plate is easy to cut, bend and other mechanical processing, which can effectively improve the machining efficiency of the factory. [0003] At present, this kind of steel can be divided into three types: the first is wear-resistant steel such as NM360 series or 1E...

Claims

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Application Information

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IPC IPC(8): C22C38/32C21D8/00E02F9/28
Inventor 诸金平
Owner 锡山区鹅湖慧盾机械厂