?? Shandong shunxinda Machinery Co., Ltd. (13969559358) is located in Liaocheng Economic Development Zone, Jiangbei water city with beautiful scenery. It is a company specializing in the production, processing and sales of precision seamless pipe, cold drawn precision seamless pipe and cold-rolled precision seamless pipe
?? Price antibacterial property of high nitrogen nickel free precision seamless pipe in microbial environment
It is difficult to guarantee that the materials have excellent corrosion resistance, antibacterial properties and processing properties at the same time. When the content of CE or La is in the range of 0.15 ~ 0.2wt%, a relatively good compromise can be achieved between these properties. The research shows that under the comprehensive fine crystallization of about 0.1wt% niobium, vacuum melting and accelerating solidification speed, silver rich phase disperses in the matrix when the silver content is 0.04 ~ 0.06wt%, which makes the price of silver containing precision seamless pipe produce excellent antibacterial performance against Staphylococcus aureus and Escherichia coli, and will not be weakened by repeated use and wear. It is found that the price of silver containing precision seamless tube can improve the corrosion resistance in microbial environment, but if the silver content is too high, the corrosion resistance of precision seamless pipe price in non microbial environment will be damaged, and the nickel release rate of precision seamless pipe price will be slightly improved. In view of the possible nickel allergy risk of s316l precision seamless tube after antibacterial modification, the material selection criteria of high nitrogen nickel free austenitic precision seamless pipe for jewelry was proposed. Based on this, the experimental steel 00cr18mn18mo2n0.55 was confirmed. It was found that the steel has excellent pitting corrosion resistance in non microbial environment, but it will form a prosperous biofilm when contacting with bacterial liquid, It can obviously promote the growth and reproduction of bacteria, and induce microbial corrosion, which indicates that the basic reason for the serious adhesion is that the price of high nitrogen precision seamless tube provides a rich nutrition base for the adhesion and growth of bacteria. It is pointed out that the price of high nitrogen nickel free precision seamless pipe is not suitable for microbial environment, and copper and silver are selected to stop antibacterial modification. It is found that the copper content of about 3.5wt% 00cr18mn18mo2n0.55 precision seamless pipe can improve the bacterial adhesion after aging at 800 ¡æ for 1 h, but the antibacterial property is weak. At the same time, the chromium nitride precipitated will obviously damage the corrosion resistance. The longer the aging time is, the more serious the corrosion resistance will be damaged. It is pointed out that copper is not suitable for the development of high nitrogen nickel free antibacterial precision seamless pipe.
? It is found that the silver content in the price of 00cr18mn18mo2n0.55 precision seamless tube can achieve antibacterial effect only when the silver content is higher than that in s316l. It is proposed that this is the result of the competition between silver antibacterial and nitrogen promoting bacteria, the formation of silver ammonia complex ion with slow-release effect and manganese improving the solid solution of silver in the matrix. The precision seamless tube price tube containing 0.13 ~ 0.15wt% silver (00cr18mn18mo2n0.55) has been designed and developed. The steel can block bacterial adhesion and biofilm development in microbial environment, and has good antibacterial and microbial corrosion resistance; In the non microbial environment, it still adheres to excellent pitting corrosion resistance and abrasion resistance, and there is no risk of nickel allergy and metal toxicity. It can meet the requirements of jewelry processing, and its comprehensive performance is better than s316l jewelry materials with promising prospects. There are two categories of chemical analysis system and instrument analysis system. The price of precision seamless tube points out that when cerium or lanthanum is used to modify s316l precision seamless tube, the modification is stopped. Among them, X-ray fluorescence analysis technology, which belongs to the instrument analysis system, has the advantages of fast, nondestructive, accurate, simple operation and reliable results in measuring the price of precision seamless pipe, and has been widely used in recent years. A portable energy dispersive X-ray fluorescence analyzer is used to analyze the main elements and interference elements of the precision seamless tube. Taking the price of the chromium nickel precision seamless tube as the research object, through theoretical research and experimental research, it is concluded that X-ray analysis technology is an efficient, non-destructive and reliable method to determine the price chemical composition of precision seamless tube, This paper mainly obtains the following results: the accuracy of ied-2000t multi-element rapid analyzer is evaluated by using relative standard deviation formula. Under the same measuring conditions, the price sample of 1659 CrNi precision seamless pipe was measured 27 times, and each measurement time was 100s. The RSD was about 0.11% by analyzing the measurement data according to the standard deviation formula, which indicated that the accuracy of XRF analyzer was very good; The good parameters of ied2000-t hand-held multi-element rapid analyzer are obtained through experiments. The best exciting pipe pressure is 17 kv-21 kV, and the best exciting pipe current is 6 ¦Ì A-10 ¦Ì A. The best measurement time is 1003. In this paper, through a variety of mathematical methods, the matrix effect of Cr Ni precision seamless pipe price, namely characteristic absorption and characteristic enhancement effect, is corrected. A group of samples with unknown price of Cr Ni precision seamless tubes were measured, and the measurement results were comparable with the chemical analysis values. The average relative error of crmnfeni is 0.22% 0.47% 0.13% 0.79%, which greatly improves the accuracy of measurement results, and basically meets the requirements of precision seamless pipe price industry. Through analysis and discussion in this paper, it is indicated that portable energy dispersive X-ray fluorescence analyzer is a fast, non-destructive, accurate and advanced detection method to detect the chemical composition of alloy precision seamless pipe.
?? The company reserves a variety of specifications of precision seamless pipe, cold drawn precision seamless pipe, cold-rolled precision seamless pipe, perennial business in Tianjin, Baotou Steel, Baosteel, Hengyang, Angang, Chengdu, Yegang, Lubao, Anyang, Jiangyin, Hongdu and other high-quality seamless steel pipe, alloy steel pipe, high-pressure boiler pipe, alloy high-pressure seamless pipe, thick wall seamless pipe, fluid pipe, structural pipe, chemical fertilizer special pipe, Petroleum cracking pipe, low pressure boiler pipe, large diameter seamless pipe, large diameter welded pipe, precision steel pipe, etc. The materials of common resources are: 10 ¡Á 10, 20 ¡Á 10, 45 ¡Á 10, 16Mn, 27SiMn, 12Cr1MoV, 15CrMo, 12Cr1MoVG, 15CrMoG, 10CrMo910, 20Cr, 40Cr, 35CrMo, 304, 316, 316L, 310S, 309S, etc.