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High-hardness steel cut wire shot heat treatment technology

A steel wire cutting shot, high hardness technology, applied in the direction of heat treatment furnace, heat treatment equipment, metal material coating process, etc., to achieve the effect of compact internal structure, saving use cost and improving wear resistance

Active Publication Date: 2014-02-26
SHANDONG KAITAI SHOT BLASTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]However, in the existing production technology, ordinary steel wire cut shot generally does not undergo heat treatment, and is used immediately after cutting, rounding and passivation, and its hardness is only 48-55HRC , when dealing with materials with a hardness of 60HRC and above, the effect is not good, which limits the application of steel wire cut shot

Method used

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  • High-hardness steel cut wire shot heat treatment technology
  • High-hardness steel cut wire shot heat treatment technology
  • High-hardness steel cut wire shot heat treatment technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Select the same batch of CW1.0 high-carbon steel cut shot, heat the CW1.0 high-carbon steel cut shot to 800°C, 810°C, 820°C, 830°C, 840°C, keep it warm for 15 minutes, and quickly immerse it in water to cool it. Its hardness reaches above 64HRC; then tempering treatment, the tempering conditions are: heat the quenched CW1.0 high carbon steel wire cut shot to 140°C, 150°C, 160°C, 170°C, 180°C in a resistance furnace ℃, heat preservation for 15-30min, then cool naturally in the air, and the tempered high-carbon steel wire cut shot is subjected to gas nitriding treatment, and its hardness is tested by Vickers hardness tester. After the CW1.0 high-carbon steel wire cut shot is quenched, tempered and nitrided in sequence, the hardness test results are shown in Table 2.

[0028] The conditions of the above heat treatment are: quenching heating to 800°C, heat preservation for 15min, quenching medium is water; heating to 140°C, 150°C, 160°C, 170°C, 180°C for tempering, heat pre...

Embodiment 2

[0038] Select the same batch of CW1.5 high-carbon steel wire cut shots, heat the CW1.5 high-carbon steel wire cut shots to 800°C, 810°C, 820°C, 830°C, 840°C, and then quickly immerse them in water to cool them to make their hardness reach Above 64HRC; then tempering treatment, the tempering conditions are: heat the quenched CW1.0 high-carbon steel wire cut shot to 140°C, 150°C, 160°C, 170°C, 180°C in a resistance furnace, keep warm After 15-30 minutes, cool naturally in the air, and carry out nitriding treatment, and use Vickers hardness tester to test its hardness. After the CW1.5 high-carbon steel wire cut shot is quenched, tempered and nitrided in sequence, the hardness test results are shown in Table 3.

[0039] table 3

[0040]

[0041] It can be seen from Table 3: CW1.5 high-carbon steel wire cut shot is quenched at 800°C, tempered at 170°C for 15 minutes, and can reach 63HRC after nitriding treatment.

Embodiment 3

[0043] Select the same batch of CW1.0 high-carbon steel wire cut shot for the following treatment:

[0044] High-temperature quenching: Quenching the CW1.0 type of high-carbon steel cut shot within the temperature range of 800°C-840°C. The holding time is 15 minutes. After quenching, the hardness reaches above 64HRC, and then tempering;

[0045] Heating to 800°C for quenching, holding for 15 minutes, the quenching medium is water; heating to 140°C, 150°C, 160°C, 170°C, 180°C for tempering, holding for 15-30 minutes, cooling in air.

[0046] Heating to 810°C for quenching, holding for 15 minutes, quenching medium is water; heating to 140°C, 150°C, 160°C, 170°C, 180°C for tempering, holding for 15-30 minutes, cooling in air.

[0047] Heating to 820°C for quenching, holding for 15 minutes, the quenching medium is water; heating to 140°C, 150°C, 160°C, 170°C, 180°C for tempering, holding for 15-30 minutes, cooling in air.

[0048] Heating to 830°C for quenching, holding for 15 mi...

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Abstract

The invention relates to a processing technology of metal abrasives, specifically to a high-hardness steel cut wire shot heat treatment technology. The high-hardness steel cut wire shot heat treatment technology comprises steps of high temperature quenching, low temperature tempering and nitriding processing. As high-carbon steel wire is prepared by drawing and cutting processes, the high-carbon steel wire has advantages of high composition uniformity, good consistency, compact internal microstructure, small hardness deviation and uniform particle size. According to the processing technology, high-carbon steel wire successively undergoes quenching, tempering and nitriding. Thus, processed steel cut wire shot has high hardness as well as good wear resistance. Surface cleaning and reinforcement of a high-strength steel plate can be carried out.

Description

technical field [0001] The invention relates to a metal abrasive processing technology, in particular to a heat treatment technology for high-hardness steel wire cut shot. Background technique [0002] Metal abrasives for shot blasting and strengthening mainly include cast steel shot, cast iron shot, steel wire cut shot and so on. Among them, due to casting, the cast steel shot is easy to form defects such as shrinkage cavity or looseness in the core, which affects its fatigue life and cleaning effect; the Owen life of cast iron shot is too low (only about 600 times on average), and the pollution is serious. The cost is too high, and it is now facing elimination; while the steel wire cut shot is made of cut steel wire, its structure is very dense, Owen's life is long, the hardness is high, and the processing speed is fast. It is an ideal metal abrasive for shot blasting and strengthening. [0003] However, in the existing production technology, ordinary cut steel wire shot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/36C21D6/00C21D1/18C23C8/26C23F17/00
Inventor 王勇杰刘立艳王守仁王学亮刘民伟
Owner SHANDONG KAITAI SHOT BLASTING MACHINERY
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