Method for manufacturing high strength and high toughness alloy steel
A manufacturing method and alloy steel technology, applied in the field of alloy steel, can solve the problems of poor weather resistance, low tensile strength and high carbon content
Active Publication Date: 2014-12-10
JIANGSU JINYUAN FORGE
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Aiming at the problems of high carbon content, poor toughness and weather resistance, and low tensile strength in current high-strength alloy steel, the invention provides a method for manufacturing alloy steel. The alloy steel obtained by the method not only has high strength, but also has It also has excellent toughness. The microstructure and mechanical properties of the steel plate along the plate thickness direction are uniform. The tensile strength is a high-strength and high-toughness alloy steel with a tensile strength of 700MPa. The composition of the steel is designed simply. Compared with the traditional quenched and tempered high-strength steel, The carbon content of the steel is extremely low, so its structure uniformity and mechanical uniformity are better, and the toughness and weather resistance of the steel plate are excellent
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 moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0015] The manufacture method of the high-strength high-toughness alloy steel proposed by the present invention comprises the following steps:
[0016] (1) The alloy steel is smelted in a vacuum induction furnace by pre-desulfurization of molten iron. The specific chemical composition of the alloy steel is: carbon: 0.14-0.19wt%, silicon: 0.20-0.33wt%, boron: 0.02-0.05 wt%, manganese: 0.85%~1.30wt%, phosphorus: ≤0.02wt%, sulfur: 0.015~0.02wt%, chromium: 0.08~0.1wt%, vanadium: 0.6~0.2wt%, nickel: 0.30~0.50wt% , copper: 0.2-0.3wt%, molybdenum: 0.02-0.08wt%, titanium: ≤0.2wt%, niobium: ≤0.06wt%, and the balance is iron.
[0017] (2) The alloy steel obtained in step (1) is smelted and cast into an ingot, and then subjected to preliminary rolling and finishing rolling in sequence; wherein, the initial rolling start temperature is ≥1150°C, the finish rolling start temperature is ≤900°C, and the finish rolling start temperature is ≤900°C. The rolling end temperature is ≤800°C, the cu...
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
| Property | Measurement | Unit |
|---|---|---|
| tensile strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
Login to View More
Abstract
The present invention discloses a method for manufacturing high strength and high toughness alloy steel, comprising the steps of: smelting the alloy steel in a vacuum induction furnace by using molten iron pre-desulfurization; conducting first rolling and finish rolling sequentially after smelting and casting the alloy steel into ingots; cooling by air after the first rolling and the finish rolling; and conducting homogenization heat treatment, heat processing, annealing, quenching, and temper heat treatment for the air-cooled alloy steel.
Description
technical field [0001] The invention belongs to the field of alloy steel, in particular to a method for manufacturing high-strength and high-toughness alloy steel. Background technique [0002] In the prior art, the carbon content of alloy steel is relatively high, for example, 100 and 100W steel in the American Society for Testing and Materials standard ASTMA709 / A709M-01b, its carbon content is greater than 0.10%, although this alloy steel has high strength, But its toughness and welding performance are poor. Patent application number 2004100967957 discloses a kind of alloy steel. The alloy steel is produced by the TMCP+RPC+SQ method, and the high-strength steel with a tensile strength level of 800MPa is obtained, and the steel is delivered in a quenched state, but the residual stress of the alloy steel is relatively large. Alloy steel does not contain Cr, so its weather resistance is poor. Patent application number 200410061112.4 also discloses an alloy steel, but the a...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/54C21D1/26C21D1/18C21D1/25C21D8/02
Inventor 葛艳明袁志伟
Owner JIANGSU JINYUAN FORGE