HTPro_090914_OMM.pdf
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Cooling curves of polyacrylate quenchants The cooling curves of the polyacrylate solutions can be almost straight, which is the result of the extended vapor phase and reduced heat extraction during the boiling phase. This unique property of the polyacrylate quenchants allows their applications for hardening of crack-susceptible parts made of high-hardenability steels. Applications of this kind usually are not possible with any other polymer quenchants, or else they require much higher concentrations of the polymer. Comparison of cooling curves of a polyacrylate quenchant with those of water, conventional quenching oil, and a few typical polymer quenchants is shown in the graphs. Specifically, the graphs show the cooling rates of different polymer quenchants at 20% concentration at temperatures of 25 and 60°C (80 and 140°F). PVA = polyvinyl alcohol; PAG = polyalkylene glycol; PVP = polyvinyl pyrrolidone. Volume 4A, Steel Heat Treating Fundamentals and Processes ->Steel Quenching Fundamentals and Processes -> Quenching of Steel -> Polymer Quenchants
Transcript of HTPro_090914_OMM.pdf
Cooling curves of polyacrylate quenchants
The cooling curves of the polyacrylate solutions can be almost straight, which is the result of the extended vapor phase and reduced heat extraction during the boiling phase. This unique property of the polyacrylate quenchants allows their applications for hardening of crack-susceptible parts made of high-hardenability steels. Applications of this kind usually are not possible with any other polymer quenchants, or else they require much higher concentrations of the polymer. Comparison of cooling curves of a polyacrylate quenchant with those of water, conventional quenching oil, and a few typical polymer quenchants is shown in the graphs.
Specifically, the graphs show the cooling rates of different polymer quenchants at 20% concentration at temperatures of 25 and 60°C (80 and 140°F). PVA = polyvinyl alcohol; PAG = polyalkylene glycol; PVP = polyvinyl pyrrolidone.
Volume 4A, Steel Heat Treating Fundamentals and Processes ->Steel Quenching Fundamentals and Processes -> Quenching of Steel -> Polymer Quenchants
