High-strength and free-cutting silicon brasses designed via the zinc equivalent rule

Chao, Yang; Ding, Zhi; Tao, Qin; Li, Liang; Ding, Yanfei; Zhang, W.W.; Zhu, Quan Li

doi:10.1016/j.msea.2018.03.055

Cited by 20 publications

(11 citation statements)

References 25 publications

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“…The experimental determination of the emissivity was conducted on the brass alloy C27200. Due to the excellent mechanical properties, machinability and corrosion resistance of brass, it is widely used in pipes, valves and fittings in systems that transport water and other aqueous fluids [11]. Chemical characteristics of the chosen brass alloy are given in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Determination of Emissivity of Brass Alloy using Infrared Thermographic Technique

Lanc

Zeljković

Živković

et al. 2018

Materials and Geoenvironment

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This paper presents the experimental determination of the dependence of emissivity of brass on surface roughness and temperature. The investigation was conducted using the infrared thermographic technique on brass alloy C27200 workpieces with different degrees of surface roughness, during the continuous cooling process. The results obtained showed that the emissivity of the chosen brass alloy increases with greater surface roughness and decreases during the cooling process, its value ranging from 0.07 to 0.19. It was concluded that surface roughness has a greater influence on the increase of the emissivity at higher temperatures, which can be seen in the three-dimensional infrared images. Multiple regression analysis confirmed a strong correlation between the examined parameters and the emissivity, and an original multiple regression model was determined.

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Section: Methodsmentioning

confidence: 99%

Determination of Emissivity of Brass Alloy using Infrared Thermographic Technique

Lanc

Zeljković

Živković

et al. 2018

Materials and Geoenvironment

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“…This concept was explored by Alirezaei and Doostmohammadi and used to design a high-hardness Cu30Zn-Si brass [70]. For the design of novel Pb-free brasses the Zn equivalent rule has been used extensively to predict the formulating phases in said alloys (Equation ( 1)) [24,71].…”

Section: Novel Lead-free Brassesmentioning

confidence: 99%

“…In turn, this challenge sparked significant interest for the development of brass systems that enable the formation of said particles through the incorporation of various alloying elements such as bismuth (Bi), graphite, magnesium (Mg) silicon (Si), tin (Sn) and titanium (Ti) [21][22][23]. C. Yang et al proposed the development of novel brass compositions by including beta (β) phase stabilisers and solid-solution strengtheners while simultaneously reducing the Zn content to enable the manifestation of high-strength and proper machinability [24]. The main drawback of these design routes however is the deviation from standardised compositions, requiring for additional approval requirements by International Organizations and Regulatory Authorities to be adopted in the supply chain.…”

Section: Introductionmentioning

confidence: 99%

Machinable Leaded and Eco-Friendly Brass Alloys for High Performance Manufacturing Processes: A Critical Review

Stavroulakis

Toulfatzis²,

Pantazopoulos³

et al. 2022

Metals

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The recent environmental/health and safety regulations placed restrictions of use of hazardous substances on critical manufacturing sectors and consumers’ products. Brass alloys specifically face a challenging issue concerning the elimination of lead (Pb) which has been a critical element affecting both the machinability and overall quality and efficiency of their manufacturing process. The adaptation of novel materials and processing routes in the green economy constitutes a crucial decision for competitive business and industry growth as a worldwide perspective with substantial industrial and social impact. This paper aims to review the emergent innovative and sustainable material solutions in the manufacturing industry, in line with environmental regulations, by highlighting smart alloy design practices and promoting new and innovative approaches for material selection and manufacturing process optimisation. In this review we analyse the processing, structure and machinability aspects of leaded brasses and underline the major guidelines and research methodologies required to overcome this technical challenge and further improve the mechanical properties and machinability of lead-free brass alloys. Various alloying and processing strategies were reviewed together with the most important failure types, as they were extracted from the existing industrial and technological experience, covering more than 20 years of research in this field.

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“…Therefore, it is imperative to develop low-lead or lead-free alternative alloys. Some promising results have already been obtained when lead in brasses was substituted with bismuth [14], titanium [15] or silicon [16][17][18]. In addition, it has been reported that Mn and Si can improve the wear resistance of the alloys by forming Mn 5 Si 3 precipitated particles [19].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Microhardness and Tribological Properties of Bronze–Steel Bimetallic Composite Produced by Vacuum Diffusion Welding

et al. 2022

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In this paper, a lead–bronze/steel bimetal composite was produced by vacuum diffusion welding technology. The microstructure, hardness and tribological properties under the dry sliding condition of the bimetal structured material were investigated and compared with two reference samples, i.e., lead–bronze and Mn/Si–brass. The wear mechanism of the three materials was also analyzed in detail. It was found that the bimetallic structure possessed the best wear resistance among the three samples. When paired with the ball bearing steel, the wear rates of the lead–bronze and Mn/Si–brass were 13 and 54 times higher than that of the bimetal composite. When paired with bearing steel, the wear rates of the two materials were 13 and 54 times higher than the bimetallic composite, respectively. This is because the steel layer served as a bearing layer to decrease the plastic deformation of the bronze layer. Furthermore, the lead can accelerate the formation of a dense hardened layer at the sliding interfaces to avoid subsequent wear of the bronze surface. Nevertheless, this hardened layer caused severe scuffing on the steel balls. Therefore, lead–bronze/steel structured material is recommended to match with hard counterface material, such as cemented carbide.

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High-strength and free-cutting silicon brasses designed via the zinc equivalent rule

Cited by 20 publications

References 25 publications

Determination of Emissivity of Brass Alloy using Infrared Thermographic Technique

Determination of Emissivity of Brass Alloy using Infrared Thermographic Technique

Machinable Leaded and Eco-Friendly Brass Alloys for High Performance Manufacturing Processes: A Critical Review

Microstructure, Microhardness and Tribological Properties of Bronze–Steel Bimetallic Composite Produced by Vacuum Diffusion Welding

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