Hot-rolled coiled plate for gardening tool and manufacturing method of hot-rolled coiled plate

A garden tool and manufacturing method technology, applied in the field of metallurgy, can solve problems such as short life, unfavorable technological progress, low-carbon environmental protection, waste, etc., and achieve the effects of long service life, excellent comprehensive performance, and thin decarburization layer thickness

Inactive Publication Date: 2019-02-15
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, materials with low cost and short life are generally used in China, which undoubtedly causes huge waste and is not conducive to technological progress and low-carbon environmental protection. Especially high-end products with high added value rely on imports for a long time, and the market is almost monopolized by imported products.

Method used

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  • Hot-rolled coiled plate for gardening tool and manufacturing method of hot-rolled coiled plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] The percentage by weight of the chemical composition of the garden tool hot-rolled coil of the present embodiment is:

[0108]C: 0.92 Si: 0.23 Mn: 0.42 P: 0.012 S: 0.001 Al: 0.018

[0109] Cr: 0.291V: 0.15N: 0.004

[0110] The balance is Fe and unavoidable impurity elements.

[0111] The coil plate of this embodiment is 5.0mm thick, 1219mm wide, and 397.05m long.

[0112] The yield strength of the hot-rolled state is 661MPa, the tensile strength is 1064MPa, the elongation is 12%, the hardness is HBW321, and the thickness of the decarburized layer is 0.00mm. The yield strength of the hot-rolled coil in the heat-treated state is 320MPa, the tensile strength is 590MPa, the elongation is 27.0%, the hardness is HRB 87.5, and the thickness of the decarburized layer is 0.01mm. Meet the performance needs of hot-rolled coils for garden tools.

[0113] The present embodiment is carried out on a 180-ton top-bottom double-blowing converter and a 2250mm hot continuous rolling mi...

Embodiment 2 to Embodiment 6

[0167] The chemical composition of the hot-rolled coils for garden tools in Examples 2 to 6 is shown in Table 1.

[0168] The manufacturing methods of the hot-rolled coils for garden tools in Examples 2 to 6 are the same as in Example 1 except for the process parameters listed in Table 2.

[0169] Table 2 shows the mechanical properties of the hot-rolled coils for garden tools in Examples 2 to 6 in the hot-rolled state.

[0170] Table 1

[0171]

C

Si

mn

P

S

AL

Cr

V

Example 2

0.88

0.21

0.65

0.010

0.003

0.018

0.55

0.20

Example 3

0.89

0.25

0.60

0.011

0.004

0.017

0.40

0.17

Example 4

0.91

0.26

0.35

0.013

0.002

0.022

0.35

0.10

Example 5

0.93

0.22

0.47

0.011

0.003

0.019

0.31

0.08

Example 6

0.97

0.20

0.45

0.012

0.002

0.021

0.33

0.05

[0172] Table 2

[0173]

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Abstract

The invention provides a hot-rolled coiled plate for a gardening tool. The hot-rolled coiled plate comprises, by weight percent, 0.83%-1.03% of C, 0.12%-0.40% of Si, 0.25%-0.90% of Mn, 0.010%-0.070% of Al, not larger than 0.025% of P, not larger than 0.025% of S, 0.30%-0.80% of Cr, not larger than 0.55% of C and the balance Fe and inevitable impurity elements. The invention further provides a manufacturing method of the hot-rolled coiled plate for the gardening tool. The manufacturing method comprises the steps of molten iron pretreatment, converter smelting, external refining (LF+RH), slab continuous casting, hot conveying and hot charging or slab heat treatment, slab heating, high-pressure water descaling, rolling of roughing rolling unit, high-pressure water descaling, rolling of finishing mill group, cooling after rolling, coiling, cooling after coiling and heat treatment of the hot-rolled coiled plate. The hot-rolled coiled plate for the gardening tool has high hardness and wear resistance and excellent high-temperature mechanical performance and hardenability.

Description

technical field [0001] The invention belongs to the field of metallurgy. Specifically, the invention relates to a hot-rolled coil for garden tools and a manufacturing method thereof. Background technique [0002] Garden tools refer to tools used for gardening and other aspects. There are also different classifications of tools according to the different occasions in which they are used. Garden tools include garden tools and garden implements. [0003] Among gardening tools, garden scissors and flower tools are included. Garden scissors mainly include high branch shears, hedge shears (hedge shears), pruning shears (pruning shears, pruning shears), multi-purpose shears, fruit picking shears, flower shears, grass shears, etc.; garden set of flower tools There are flower shovel, flower shovel, flower rake, flower hoe, flower fork, etc. Specifically, it refers to two-headed hoe (two-headed flower hoe), flat hoe, flat rake, three-tooth flower hoe, three-tooth flower rake, hoe r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/18C22C38/24C22C33/04C21C7/064C21C7/10C21D8/02
CPCC21C7/0006C21C7/064C21C7/10C21D8/0205C21D8/0226C21D8/0247C22C33/04C22C38/02C22C38/04C22C38/06C22C38/18C22C38/24
Inventor 胡松涛王育田付培茂
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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