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Preparation method of stainless steel used for digging buckets

A stainless steel and excavator technology, applied in the field of stainless steel preparation for excavator buckets, can solve problems such as reducing the service life of buckets, and achieve the effects of product quality control, high toughness, and high yield

Inactive Publication Date: 2014-05-14
无锡市锡山区鹅湖镇荡口青荡金属制品厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, since the bucket is in direct contact with materials such as sand and stones, and the surface of the bucket will heat up due to high friction during contact, when the sand contains a certain amount of water, the bucket made of the above conventional materials will Rust damage occurs on the surface, and the rust layer will be rubbed off when it is used next time, so that the new surface will be exposed again, and then rust will occur again, and the cycle will greatly reduce the service life of the bucket. Therefore, it is urgent to study a satisfying The bucket uses the required stainless steel material to replace the material of the existing bucket, so as to improve its performance and greatly extend the service life of the bucket

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing stainless steel for excavator buckets, the stainless steel is composed of the following components in weight percentage: C: 0.30%, Si: 0.80%, Mn: 0.70%, P: ≤0.030%, S: ≤0.010% , Cr: 15.0%, Nb: 0.10%, Mo: 0.40%, W: 0.50%, the balance is Fe and unavoidable impurities; the preparation method includes induction furnace steelmaking, casting, rolling, stack cooling and heat treatment , specifically: the refining time of the induction furnace steelmaking is controlled at 15 minutes, the tapping temperature is controlled at 1620°C, and titanium wire is added 5 minutes before tapping; after the steel is tapped, it is calmed down for 8 minutes, and then pouring is started; the rolling start The temperature is controlled at 1200°C, the final rolling temperature is controlled at 920°C, and the stack is cooled after rolling; during the heat treatment process, the annealing pretreatment temperature is controlled at 820°C, and it is cooled to room temperature wit...

Embodiment 2

[0020] A method for preparing stainless steel for excavator buckets, the stainless steel is composed of the following components in weight percentage: C: 0.40%, Si: 0.60%, Mn: 0.90%, P: ≤0.030%, S: ≤0.010% , Cr: 13.0%, Nb: 0.30%, Mo: 0.20%, W: 1.50%, the balance is Fe and unavoidable impurities; the preparation method includes induction furnace steelmaking, casting, rolling, stack cooling and heat treatment , specifically: the refining time of the induction furnace steelmaking is controlled at 30 minutes, the tapping temperature is controlled at 1600 ° C, and titanium wire is added 7 minutes before tapping; after the steel is tapped, it is calmed down for 3 minutes, and then pouring is started; the rolling start The temperature is controlled at 1250°C, the final rolling temperature is controlled at 900°C, and the stack is cooled after rolling; during the heat treatment process, the annealing pretreatment temperature is controlled at 840°C, and it is cooled to room temperature w...

Embodiment 3

[0022] A method for preparing stainless steel for excavator buckets, the stainless steel is composed of the following components in weight percentage: C: 0.35%, Si: 0.70%, Mn: 0.80%, P: ≤0.030%, S: ≤0.010% , Cr: 14.0%, Nb: 0.20%, Mo: 0.30%, W: 1.0%, the balance is Fe and unavoidable impurities; the preparation method includes induction furnace steelmaking, casting, rolling, stack cooling and heat treatment , specifically: the refining time of the induction furnace steelmaking is controlled at 25 minutes, the tapping temperature is controlled at 1610°C, and titanium wire is added 6 minutes before tapping; after the steel tapping is finished, it is calmed down for 5 minutes, and then pouring is started; the rolling starts The temperature is controlled at 1225°C, the final rolling temperature is controlled at 910°C, and the stack is cooled after rolling; during the heat treatment process, the annealing pretreatment temperature is controlled at 830°C, and it is cooled to room tempe...

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Abstract

The invention discloses a preparation method of stainless steel used for digging buckets. The stainless steel comprises C, Si, Mn, P, S, Cr, Nb, Mo, W and Fe. According to the preparation method, the refining time in steelmaking in an induction furnace is controlled to be 15-30 min, the tapping temperature is controlled to be 1600-1620 DEG C, and titanium wires are added 5-7 min before tapping; a killing step is performed 3-8 min after the tapping step is finished and then a pouring step is started; the start rolling temperature during a rolling step is controlled to be 1200-1250 DEG C, the finish rolling temperature is controlled to be 900-920 DEG C, and a step of cooling in pile is performed after the rolling step is finished; the annealing pretreatment temperature is controlled to be 820-840 DEG C in a thermal treating step and the steel is cooled inside the furnace to room temperature; the quenching temperature is controlled to be 1120-1160 DEG C and the steel is then discharged from the furnace and cooled in the air; and the tempering temperature is controlled to be 150-250 DEG C and the steel is then discharged from the furnace and cooled in the air.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for preparing stainless steel for excavator buckets. Background technique [0002] The performance of the excavator bucket directly determines the service life of the bucket, and it is one of the most important steel types in the construction machinery and vehicle industry. The working environment of the bucket is very harsh, and strict requirements are put forward for the performance of the bucket: when the shovel blade shovels into materials such as ore, sand, coal, etc., it will directly rub and collide with the material strongly, in addition to requiring the bucket to have sufficient hardness and Abrasion resistance, in order to resist wear and tear, the steel plate also needs to have high toughness to prevent deformation and fracture of the steel plate; at the same time, since the shovel blade plate is generally welded on the bucket, there are stri...

Claims

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Application Information

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IPC IPC(8): C22C38/26C21D8/02
Inventor 钱永清
Owner 无锡市锡山区鹅湖镇荡口青荡金属制品厂
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