2019
DOI: 10.3390/ma12081351
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Microstructure and Mechanical Properties of 34CrMo4 Steel for Gas Cylinders Formed by Hot Drawing and Flow Forming

Abstract: An integral manufacturing process with hot drawing and cold flow forming was proposed for large-diameter seamless steel gas cylinders. The main purpose of this study was to find out the effects of the manufacturing process on the microstructure and mechanical properties of gas cylinders made of 34CrMo4 steel. Two preformed cylinders were produced by hot drawing. One cylinder was then further manufactured by cold flow forming. The experiments were carried out using three types of material sample, namely, base m… Show more

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Cited by 10 publications
(6 citation statements)
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“…Therefore, the sampling direction had little influence on the FCG rate for HD and CF materials, indicating that the HD and CF materials were almost homogeneous and isotropic [17]. It was in accord with the previous work [18]. The FCG rates of HD and CF materials were significantly different from that of BM.…”
Section: Fatigue Crack Growth Testssupporting
confidence: 88%
See 1 more Smart Citation
“…Therefore, the sampling direction had little influence on the FCG rate for HD and CF materials, indicating that the HD and CF materials were almost homogeneous and isotropic [17]. It was in accord with the previous work [18]. The FCG rates of HD and CF materials were significantly different from that of BM.…”
Section: Fatigue Crack Growth Testssupporting
confidence: 88%
“…The DFP model only presented a parametric expression based on the stress intensity factor K. The experimental data obtained in current work was utilized to check the fitness of DFP model for the investigated materials. Based on the previous research results, the yield stresses and the Young's modulus of the HDL, HDT, CFL, CFT, and BM are listed in Table 4 [18]. It can be found that the yield stress of BM was obviously lower than those of HD and CF materials by 30.9-42.1% approximately.…”
Section: Discussionmentioning
confidence: 87%
“…Through such means, the cylinder wall thickness uniformity was greatly improved and the dimensional accuracy was higher. By investigating the relationship between the microstructure and mechanical properties of gas cylinders, Li et al 8 improved the mechanical properties of gas cylinders based on the manufacturing process proposed by Jin et al 7 . Zoghi and Fallahi Arezoodar 9 manufactured pressure vessels using a necking spinning process, which essentially involved forming parts by applying the required force and displacement to the rotating blank by means of one or more forming rolls.…”
Section: Introductionmentioning
confidence: 99%
“…In many countries, there are legislations which ensure compliance with current standards in cylinder manufacturing, in order to ensure material performance and avoid loss of lives due to cylinder-related accidents [1]. The 34CrMo4 steel is a widely used material for the manufacturing of gas cylinders due to its superior corrosion resistance, mechanical properties, deformation characteristics and hardenability [1][2]. The well balanced chemical composition of 34CrMo4 low carbon steel combined with good heat treatment process produces a typical fine tempered structure which provides the steel's strength [3][4].…”
Section: Introductionmentioning
confidence: 99%
“…The 34CrMo4 low carbon steel's heat treatment is usually designed to ensure that a good performance of the material at high pressure, retention of strength and ductility is obtained [5]. Despite all the enviable properties this steel has, it still experiences unexpected catastrophic failures resulting from stress corrosion cracking (SCC) and other environmental attacks [2,3,6]. The failure begins in the form of crack initiation at a given site of the component (wall) and continues with the crack propagation to an overloading point where fracture occurs within the remaining section of the wall thickness [7].…”
Section: Introductionmentioning
confidence: 99%