Suitable for low temperature resistant steel strand for liquefied natural gas engineering and its production method
A technology of liquefied natural gas and production method, which is applied in the field of steel strands to achieve the effects of preventing crack propagation, improving strength and toughness, and refining grains
Active Publication Date: 2016-08-24
天津市新天钢中兴盛达有限公司
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The current ordinary steel strands are difficult to meet the needs of LNG storage tanks. Therefore, it is necessary to develop steel strands with good comprehensive mechanical properties such as high strength, low temperature resistance, corrosion resistance, and fatigue resistance to meet the special requirements of LNG storage tanks.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0017] (1) Preparation of wire rod:
[0018] Ingredients: The wire rod of the present invention is based on the SWRH82B wire rod by adding appropriate amounts of Ni, Cr, and V trace elements to reduce the content of harmful elements P, S, and Cu. The raw material composition by mass percentage is: C: 0.79-0.86%, Si: 0.15-0.35%, Mn: 0.60-0.90%, Ni: 0.15-0.30%, Cr: 0.13-0.23, V: 0.04-0.09%, P ≤0.025%, S≤0.025%, Cu≤0.20%, the balance is Fe.
[0019] The ingredients are made into steel billets according to the conventional method, and the qualified steel billets are heated, rough rolled, intermediate rolled, finished rolled, silk-spun, and controlled cooling to obtain a φ12.50mm wire rod. Among them, the billet heating temperature is 1050-1100°C, the spinning temperature is 860-880°C, air cooling is controlled on the roller table, and the air volume is 154,000m 3 / h, the roller table speed is 0.3-1.3m / s, and the cooling rate is 7-9°C / s, so that the sorbite transformation tempera...
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 |
|---|---|---|
| thickness | aaaaa | aaaaa |
| strength | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a low-temperature resistant steel strand suitable for liquefied natural gas engineering and a production method thereof, and provides a steel strand which is suitable for natural gas engineering and has good integrated mechanical property, namely high strength, low-temperature resistance, corrosion resistance, fatigue resistance and the like, and a preparation method thereof. The steel strand is prepared from the following raw materials in percentage by weight: 0.79%-0.86% of C, 0.15%-0.35% of Si, 0.60%-0.90% of Mn, 0.15%-0.30% of Ni, 0.13%-0.23% of Cr, 0.04%-0.09% of V, less than or equal to 0.025% of P, less than or equal to 0.025% of S, less than or equal to 0.20% of Cu and the balance of Fe. The steel strand disclosed by the invention is obtain through reasonable proportion of various elements by sufficiently considering low-temperature property and also considering sorbite phase transformation point change caused by a high-carbon steel coil rod in a rolling process and indexes, namely hardenability, grain size, strength and plasticity of an obtained structure and the like; the obtained steel strand has good integrated mechanical property, namely the high strength, the low-temperature resistance, the corrosion resistance, the fatigue resistance and the like, and is suitable for the demand of use of an LNG storage tank.
Description
technical field [0001] The invention relates to the technical field of metallurgy, in particular to a steel strand suitable for liquefied natural gas engineering and having good comprehensive mechanical properties such as high strength, low temperature resistance, corrosion resistance and fatigue resistance. Background technique [0002] In recent years, with the continuous development of national energy construction, the development of natural gas industry has ushered in unprecedented opportunities, and the growth rate of demand for natural gas is increasing year by year. Due to the shortage of natural gas resources in my country, the current shortage of domestic natural gas supply is mainly solved by importing liquefied natural gas (LNG). [0003] Importing liquefied natural gas requires the establishment of LNG receiving stations and transmission pipeline networks, and the use of LNG gas storage tanks for storage of liquefied natural gas. Liquefied natural gas (LNG) requ...
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): C22C38/46C21D8/06
CPCC21D8/065C22C38/02C22C38/04C22C38/42C22C38/46
Inventor 王文喜毛爱菊李金锁王莉王鸿利蔺秀艳潘捷董晨
Owner 天津市新天钢中兴盛达有限公司