Alloy steel SDH55 for shield machine tools and production method thereof

A shield machine tool, SDH55 technology, applied in alloy materials and their preparation, alloy steel for tools and their preparation fields, can solve the problems of poor wear resistance and insufficient toughness of steel, and achieve increased wear resistance and hardenability. and thermal strength, the effect of improving strength and toughness

Inactive Publication Date: 2015-08-12
SHANGHAI SHIJIN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the prior art, the object of the present invention is to overcome the deficiencies in the prior art, and provide a kind of alloy steel SDH55 for shield machine tools and its preparation method, based on the composition of special alloy steel grades for shield machine tools with high wear resistance and high toughness In terms of optimization, structure control, metallurgical quality control, forging process control, structure control of supply state and use state, and applied technology, the alloy steel SDH55 for shield machine tools of the present invention has high wear resistance and high toughness, and can significantly improve The service life of the domestic shield machine tool can reduce the construction cost, and its preparation process is easy to industrialize, which can effectively reverse the situation that the domestic shield machine tool special alloy steel still needs to be imported, and improve the poor wear resistance of the existing shield machine tool steel , the status quo of insufficient resilience

Method used

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  • Alloy steel SDH55 for shield machine tools and production method thereof
  • Alloy steel SDH55 for shield machine tools and production method thereof
  • Alloy steel SDH55 for shield machine tools and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this example, see figure 1 and image 3 , a method for preparing alloy steel SDH55 for shield machine cutters, comprising the steps of:

[0032] a. Steel ingot smelting: batching is based on the mass percentage of each alloy raw material component element of alloy steel SDH55 for shield machine tools. The chemical composition of the alloy is composed of the following elements: C content is 0.42%, Si content is 0.37%, Mn The content of Cr is 0.30%, the content of Cr is 5.8%, the content of Mo is 2.55%, the content of V is 0.80%, and the rest of the alloy components are Fe and unavoidable impurity elements. %; After batching, the raw materials of each alloy component are put into an electric arc furnace for smelting, then refining, and then vacuum degassing treatment, and finally pouring alloy steel SDH55 steel ingots for shield machine tools for use;

[0033] b. Electroslag remelting: use the alloy steel SDH55 steel ingot for shield machine tools prepared in step a ...

Embodiment 2

[0054] This embodiment is basically the same as Embodiment 1, especially in that:

[0055] In this example, see figure 2 and image 3 , a method for preparing alloy steel SDH55 for shield machine cutters, comprising the steps of:

[0056] a. Steel ingot smelting: batching is based on the mass percentage of each alloy raw material component element of alloy steel SDH55 for shield machine tools. The chemical composition of the alloy is composed of the following elements: C content is 0.46%, Si content is 0.4%, Mn The content of Cr is 0.27%, the content of Cr is 5.5%, the content of Mo is 2.6%, the content of V is 0.51%, and the rest of the alloy components are Fe and unavoidable impurity elements. %; After batching, the raw materials of each alloy component are put into an electric arc furnace for smelting, then refining, and then vacuum degassing treatment, and finally pouring alloy steel SDH55 steel ingots for shield machine tools for use;

[0057] b. Electroslag remelting...

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Abstract

The invention discloses alloy steel SDH55 for shield machine tools and a production method thereof. The alloy steel comprises, by weight, 0.4% to 0.55% of C, 0.10% to 0.40% of Si, 0.10% to 0.30% of Mn, 5.10% to 6.50% of Cr, 2.20% to 3.00% of Mo, 0.45% to 0.85% of V, the balance of Fe and unavoidable impurity elements, including not greater than 0.005% of S and not greater than 0.010% of P. The alloy steel high in wear resistance and high in toughness is made by means of matching, smelting, casting and electroslag remelting, by thermal feeding for high-temperature homogenous treatment after demolding, and by means of multidirectional forging, soft annealing and ultra-fining treatment; the problem that the current tools for shield machines are of short lives due to wear and failure and edges cracking caused by low toughness is solved; the alloy steel is of great significance to the development of the industry of special steels of shield machine tools.

Description

technical field [0001] The invention relates to an alloy material and a preparation method thereof, in particular to an alloy steel for cutting tools and a preparation method thereof, and is applied in the technical field of high wear-resistant and high-toughness alloy steel and its manufacturing process. Background technique [0002] Due to the growth of the earth's population and the intensification of the urbanization process, people are focusing more and more attention on the development and utilization of underground space. This has greatly promoted the development and application of tunnel and underground engineering construction technology. Among the many construction methods of tunnels and underground engineering, shield tunneling construction technology is widely used in countries all over the world for its advantages of mechanized construction and less impact on the surrounding environment. The shield tunnel boring machine ("shield machine" for short) is the main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/24C22B9/18C21D8/00
Inventor 吴晓春印康莹左鹏鹏吴博雅
Owner SHANGHAI SHIJIN NEW MATERIAL TECH
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