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Wear-resistant alloy steel shot for steel casting surface strengthening treatment and preparation method thereof

A technology of surface strengthening and alloy steel shot, which is applied in heat treatment equipment, heat treatment furnaces, manufacturing tools, etc., can solve the problems of not being well balanced, and the number of cycle experiments is large, so as to improve the comprehensive mechanical properties and reduce the breakage rate and wear volume, the effect of improving toughness

Active Publication Date: 2019-04-05
连云港倍特超微粉有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to further increase the number of cycles of ERVIN standard testing machine under such an element composition, because in the process of adjusting the alloy elements of the steel shot, the strength and toughness of the alloy steel shot are two contradictory aspects, which often cannot be well Taking into account, this is also a problem that the prior art does not solve well, so improving the strength and toughness of the alloy steel shot at the same time is a technical problem that needs to be solved to further improve the performance of the steel shot

Method used

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  • Wear-resistant alloy steel shot for steel casting surface strengthening treatment and preparation method thereof
  • Wear-resistant alloy steel shot for steel casting surface strengthening treatment and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The total weight of the furnace is 1000kg, and the alloy steel shot product element weight percentage composition: carbon 0.25%, silicon 0.30%, manganese 1.00%, chromium 0.8%, copper 0.50%, molybdenum 0.30%, vanadium 0.22%, boron 0.005%, sulfur <0.040%, phosphorus <0.040%, the balance is iron. Calculate the weight of the raw materials used according to the element weight percentage requirements and the element composition of the raw materials listed in Table 1, including ferrosilicon 0.14kg, ferromanganese 4.12kg, ferrochrome 8.40kg, copper 2.53kg, and ferromolybdenum 4.86kg , 2.76kg of ferrovanadium, 0.22kg of ferroboron. Carbon steel scrap adopts the national standard GB / T699-1999, grade 25 high-quality carbon structural steel scrap, and its main element weight percentages are carbon 0.25%, silicon 0.27%, manganese 0.65%, chromium 0.25%, copper 0.25% , The required weight is 980kg. Add the weighed carbon steel scraps, ferrosilicon, ferromanganese, ferrochrome, ferrova...

Embodiment 2

[0039] The total weight into the furnace is 1000kg, and the alloy steel shot product element weight percentage composition: carbon 0.15%, silicon 0.35%, manganese 1.20%, chromium 1.2%, copper 0.60%, molybdenum 0.35%, vanadium 0.25%, boron 0.006%, sulfur <0.040%, phosphorus <0.040%, the balance is iron. Calculate the weight of the raw materials used according to the element weight percentage requirements and the element composition of the raw materials listed in Table 1, including ferrosilicon 0.65kg, ferromanganese 8.64kg, ferrochrome 14.48kg, copper 3.56kg, and ferromolybdenum 5.67kg , Ferrovanadium 3.13kg, Ferroboron 0.27kg. Carbon steel scrap adopts the national standard GB / T699-1999, grade 15 high-quality carbon structural steel scrap, and its main element weight percentages are 0.143% carbon, 0.27% silicon, 0.45% manganese, 0.25% chromium, and 0.25% copper. , The required weight is 970kg. Add the weighed carbon steel scraps, ferrosilicon, ferromanganese, ferrochrome, ferr...

Embodiment 3

[0042] The total weight of the furnace is 1000kg, and the alloy steel shot product element weight percentage composition: carbon 0.30%, silicon 0.25%, manganese 0.80%, chromium 0.75%, copper 0.40%, molybdenum 0.20%, vanadium 0.20%, boron 0.004%, sulfur <0.040%, phosphorus <0.040%, the balance is iron. Calculate the weight of the raw materials used according to the weight percentage composition requirements of the elements and the element composition of the raw materials listed in Table 1. Among them, ferrosilicon 0.41kg, ferromanganese 4.04kg, ferrochrome 7.62kg, copper 1.53kg, and ferromolybdenum 3.24kg , Ferrovanadium 2.51kg, Ferro-boron 0.18kg. The carbon steel scrap adopts the national standard GB / T699-1999, grade 30 high-quality carbon structural steel scrap, and its main element weight percentages are carbon 0.300%, silicon 0.20%, manganese 0.45%, chromium 0.25%, copper 0.25% , The required weight is 983kg. Add the weighed carbon steel scraps, ferrosilicon, ferromanganes...

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Abstract

The invention belongs to the technical field of metal abrasives, and relates to a wear-resistance alloy steel shot for steel casting surface strengthening treatment and a preparation method thereof. The wear-resistance alloy steel shot for steel casting surface strengthening treatment comprises the following components in percentage by weight: 0.10-0.40% of carbon, 0.10-0.50% of silicon, 0.60-1.80% of manganese, 0.5-1.50% of chromium, 0.30-0.80% of copper, 0.10-0.45% of molybdenum, 0.20-0.30% of vanadium, 0.002-0.008% of boron, sulfur less than 0.040%, phosphorus less than 0.040%, and the balance of iron. As such multiple alloy elements as chromium, manganese, vanadium, molybdenum, copper and boron are added, when the product strength and hardness are increased, the toughness is enhanced, and problem of incapability of giving consideration to the strength improvement and the toughness improvement is preferably solved. In particular, copper, boron and other alloy elements form an excellent synergistic effect to improve the wear-resistance comprehensive performance of the product for steel casting surface strengthening treatment.

Description

Technical field [0001] The invention belongs to the technical field of metal abrasives, and specifically relates to an alloy steel shot used for shot blasting, shot blasting cleaning and strengthening treatment on the surface of steel and a preparation method thereof. Background technique [0002] The cast steel shot currently used in my country has always been the national standard GB6484 / 6485-86 product, and its weight percentages are divided into: 0.85~1.20%C, 0.40~1.50%Si, 0.60~1.20%Mn, 0~0.05%S, 0~0.05 %P, the balance is Fe. On the one hand, the carbon content is high. After several weeks of cooling into pellets, there will be serious segregation of components in the structure, a large amount of secondary cementite precipitation and the formation of high-carbon flaky martensite, and a large amount of cast steel shot surface Microcracks, after quenching and tempering again, the segregation of components cannot be eliminated, and the number of surface cracks will continue to i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/38C22C38/20C22C38/22C22C38/24C22C38/32C22C33/06C21D9/36C21D1/18
CPCC21D1/18C21D9/36C22C33/06C22C38/02C22C38/04C22C38/20C22C38/22C22C38/24C22C38/32C22C38/38
Inventor 胡硕真孟令光郑兰君王秀霞
Owner 连云港倍特超微粉有限公司