Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Special steel for hardware tools and preparation method thereof

A technology for hardware tools and processes, applied in the field of special steel for hardware tools and its preparation, can solve the problems of confusion in the market of steel for hardware tools and lack of uniform standards, and achieve the effects of ensuring strength, improving red-hardness performance, and improving ductility.

Active Publication Date: 2016-05-04
WUHAN IRON & STEEL GRP ECHENG IRON & STEEL CO LTD
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the steel market for hardware tools is extremely chaotic, and there is no uniform standard

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A special steel for hardware tools, the chemical composition of which is calculated by weight percentage: C: 0.53%, Si: 0.18%, Mn: 0.39%, P: 0.008%, S: 0.00355, Cr: 0.45%, Ni: 0.23%, Cu: 0.20%, Ti: 0.010%, the rest is iron and inevitable impurities.

[0033] The steel preparation method is carried out according to the usual clean steel process, including steel smelting, LF furnace refining, continuous casting, billet heating, rolling, cooling, and coiling steps, among which:

[0034] Electric furnace smelting, tapping temperature 1630℃, tapping target [C]: 0.15%, tapping P: 0.004%, adding active lime, deoxidized aluminum 1.2kg / t and Mn-Si, high C- Cr and Ni alloy;

[0035] LF furnace refining, the slag is sent for electrification, and then added calcium carbide, SiC, etc. to deoxidize, make white slag and keep it for 22 minutes, after adjusting the composition, soft argon blowing for 10 minutes;

[0036] The continuous casting superheat is 16℃ (the liquidus temperature of Benx...

Embodiment 2

[0042] A special steel for hardware tools, the chemical composition of which is calculated by weight percentage: C: 0.58%, Si: 0.35%, Mn: 0.20%, P: 0.020%, S: 0.005%, Cr: 0.30%, Ni: 0.30% , Cu: 0.08%, Ti: 0.020%, the rest is iron and unavoidable impurities.

[0043] The steel preparation method is carried out according to the usual clean steel process, including steel smelting, LF furnace refining, continuous casting, billet heating, rolling, cooling, and coiling steps, among which:

[0044] Converter smelting, tapping temperature 1680℃, tapping target [C]: 0.30%, tapping P: 0.015%, adding lime, deoxidized aluminum 0.8kg / t and alloy when tapping 1 / 3;

[0045] LF furnace refining white slag: 15min, soft argon blowing after adjusting the composition: 20min;

[0046] The continuous casting superheat is 30℃ (the liquidus temperature of Benxi Steel is 1490℃), the continuous casting billet size: 200×200mm, the typical drawing speed is 1.3m / min;

[0047] The heating temperature of the slab is...

Embodiment 3

[0052] A special steel for hardware tools, the chemical composition of which is calculated by weight percentage: C: 0.55%, Si: 0.24%, Mn: 0.30%, P: 0.012%, S: 0.001%, Cr: 0.355, Ni: 0.25%, Cu: 0.12%, Ti: 0.015%, the rest is iron and inevitable impurities.

[0053] The preparation method of the steel is carried out according to the usual clean steel process, including steel smelting, LF furnace refining, continuous casting, billet heating, rolling, cooling, and coiling steps, among which:

[0054] Electric furnace smelting, tapping temperature 1652℃, tapping target [C]: 0.19%, tapping P: 0.007%, adding lime, deoxidized aluminum 1.0kg / t and alloy when tapping 1 / 3;

[0055] LF furnace refining white slag retention time: 18min, soft argon blowing after the composition is adjusted: 17min;

[0056] The continuous casting superheat is 22℃ (the liquidus temperature of Benxi Steel is 1490℃), the continuous casting billet size: 240×240mm, the typical drawing speed is 0.8m / min;

[0057] The heati...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
yield strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a special steel for a hardware tool and a preparation method thereof. The steel comprises the following chemical components in percentage by weight: 0.50-0.60% of C, 0.17-0.37% of Si, 0.20-0.50% of Mn, 0.008-0.020% of P, 0.001-0.005% of S, 0.25-0.60% of Cr, 0.20-0.35% of Ni, 0.07-0.25% of Cu, 0.010-0.030% of Ti, and the rest amount of iron and inevitable impurities. The preparation method is performed by a general clean steel process, and comprises the steps of steel smelting, LF furnace refining, continuous casting, casting blank heating, rolling, cooling and reeling. All alloy element components in the steel are designed to properly increase the carbon content and decrease the content of such noble metals as Ni and Cr; the process of smelting and rolling is controlled to obtain the special steel for the hardware tool with high-hardness surface and low-hardness-toughness heart material matrix; and the steel can satisfy the performance needed by the hardware tool and the target of optical economic benefit.

Description

Technical field [0001] The invention belongs to the technical field of special steel for hardware tools, in particular to a special steel for hardware tools and a preparation method thereof. Background technique [0002] Hardware tools are important basic parts, which are widely used in most mechanical product processing, engineering structure construction, maintenance of all products and daily life. The steel for hardware tools is a highly specialized steel grade. It should have a high-hardened surface and a low-hardness and tough core. It should also have high-speed cutting and processing performance, and a certain degree of processing red hardness, especially when it cannot be cut. Bumping, falling off, peeling, etc. Because steel grades should have these special properties, conventional hardware and tool steels mainly add a large amount of alloying elements chromium Cr, nickel Ni, molybdenum Mo, vanadium V, etc. to medium carbon steel, and even increase tungsten W, titanium ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C33/04C21D8/00
Inventor 陈庆丰张贤忠陈华强余爱华汪菊华许竹桃杜方李献忠孙晶邵兰李伟万升
Owner WUHAN IRON & STEEL GRP ECHENG IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com