What is the microstructure of precipitation-hardening stainless steels, and what materials are examples of such?
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What is the microstructure of precipitation-hardening stainless steels, and what materials are examples of such?
The microstructure of precipitation-hardening stainless steel consists mainly of a martensitic matrix and dispersed precipitation phases. The characteristic of this stainless steel is that its hardness and strength are improved through precipitation hardening. Common precipitation-hardening stainless steel materials include 17-4PH, 17-7PH, etc.; the numbers represent the contents of chromium and nickel, while PH denotes precipitation hardening. Through solution treatment and subsequent aging treatment, these materials can develop fine precipitate phases such as copper, aluminum, or titanium, thereby significantly improving the mechanical properties of the material. .
Currently, there are three types: 1. Martensitic precipitation-hardening stainless steels, represented by 17-4PH; 2. Semi-austenitic precipitation-hardening stainless steels, represented by 17-7PH; 3. Austenitic precipitation-hardening stainless steels, represented by 17-10P